CONFIDENTIAL TFT-LCD TV/MONITOR Chassis NK15N* NK17N* Training TFT-LCD TV/MONITOR Model LTM1575W LTM1775W Manual CONTENTS 1. Introduction of TFT-LCD 2. Specifications 3. Alignment & Adjustments 4. Block Diagram 5. Troubleshooting 6. IC Specifications 7. Samsung LCD TV's sales points 8. General Informations of LCD 9.
Samsung Electronics Co.,Ltd. 416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea. Printed in Korea Published by S.K.
CONFIDENTIAL 2. Product Specifications 1 Specifications Description Item LTM1575W LTM1775W LCD Panel TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable, 0.2895 mm pixel pitch TFT-LCD panel, RGB vertical stripe, normaly white, 17-Inch viewable, 0.2895 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic) Vertical : 56 Hz ~ 75 Hz (Automatic) Display Colors 16.
CONFIDENTIAL Product Specifications 2 Pin Assignments 2-1 D-SUB Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2-2 DVD, DTV Separate Red Green Blue GND GND (DDC Return) GND-Red GND-Green GND-Blue No Connection GND-Sync./Self Test GND DDC Data H-Sync. V-Sync.
CONFIDENTIAL Product Specifications 3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals.
CONFIDENTIAL Product Specifications 3-2 Supported Modes (1) µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs LTM1575W/LTM1775W
CONFIDENTIAL Product Specifications 3-2 Supported Modes (2) µs µs µs µs µs µs µs µs LTM1575W/LTM1775W µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs µs
CONFIDENTIAL Product Specifications 3-2 Supported Modes (3) µs µs µs µs µs µs µs µs 2-6 µs µs µs µs µs µs µs µs LTM1575W/LTM1775W
Alignments and Adjustments 3. Factory Mode Adjustments 1 Entering Factory Mode 1.
Alignments and Adjustments LTM1575W/LTM1775W
■ The Block diagram of TFT-LCD Monitor Main Board FRC SDRAM Scaler OSD IAMGE CONTROL L V D S To Panel Inverter To Func. Brd. Micom ADC EEP ROM To LED & IR. To Panel Ctr.
■ Analog To Digital Converting 255 254 253 ADC . . . 2 1 0 T1 T2 T3 T4 T5 T6 T7 T8 ■ T1 T2 . . T5 . . T7 : 0 : 2 ■ ADC(Analog to Digital Converter) : 255 It is a device to convert analog signal to digital signal and applied 80MHz-120MHz : 2 FRC(Frame Rate Conversion): ■ FRC(Frame Rate Controller) : It is a converting part/method that constantly converts the various vertical frequencies (50-95Hz) of various modes inputted in diversity.
■ Scaling concept: It converts the resolution signal inputted in various forms to WXGA 1280x768 We have an historic mission national of restoration mission ■ Scaling We have an historic mission of national restoration ■ Image Scaler : A technique to change the inputted resolution to the other resolution. ( EX. 640x480 → 1024x768 ) mission Fine adjustment c:\program files...\pc2.
■ Adjustment of Coarse c:\program files...\pc2.
NIKE-LCD TV NTSC BLOCK DIAGRAM Tuner Sound AMP MSP3421 TCPJ9081PA27D CN808 L TA1101B RESET IC501 IC919 (KIA7029) IC604 I2C SDA55xx ( Micom) (1Mbyte) Caption TTX EEPROM IC601 IC603 EPROM IC620 Video In ▶ ▶ ▶ ▶ ▶ V-in L-in R-in S-Y S-C Y/C Vin COMPONENT (480i/p) ▶ ▶ ▶ ▶ ▶ Comp-Y Comp-Pb Comp-Pr L R I2C CVBS Y/Pb/Pr(480i) 480I/P,720P,1080I X201 14.3MHZ COMPONENT (480p,720P1 080i ) ▶ ▶ ▶ ▶ ▶ Comp-Y Comp-Pb Comp-Pr L R CXA2151 - V_Switch - Sync Sep.
Block Diagrams
■ NIKE LCD-TV NTSC adjustment RESISTOR Input analog LVDS p.4 05h Noise threshold p.4 08h Luma contrast p.4 09h Luma brightness RF/CVBS/S-VHS p.4 0AhChroma Saturation p.4 0Bh Chroma hue phase p.4 0Ch Chroma AGC Main Display p.1 1Fh Brightness p.1 20h[5:0] Contrast p.1 27h[4:0] sat sin p.1 28h[4:0] sat cos DVD 480I/P Synthesis DTV 1080i sw p.5 65h Pb scale AD9883 DVD/DTV/PC p.5 66h Pr scale 08h R gain /Cr gain p.5 67h Y scale 09h G gain /Y gain p.
1.Full white level setting 1) Pattern in use: full white (100% IRE) (1)CVBS (Measured at AV JECK) 1V P-P Input terminal: SIDE AV,VIDEO (3) Controlled by measuring instrument : video gain 140％(100％IRE) -When video gain is 100%, it is 70%IRE. (2) (TOCHIBA PATTERN) 2)MN82860 GAMMA : OFF (1) iw dc 71 07 iw dc 71 00 GAMMA DATA(GAMMA OFF) MN82860 SUB ADRESS GAMMA ON Order MN82860 SLAVE ADRESS 3) Highlight adjustment (x:282 y:283 T:10,000K) Pattern adjustment : FULL WHITE PATTERN (VIDEO GAIN 140％) -.
2. Set the low light level 1) Pattern in use: Toshiba ABL pattern Low Light Area (1)Turn On the gamma correction of NM82860.(iw dc 71 00) -There was a trial and error. In the state of gamma-off, the Toshiba pattern's cut-off is broken down because the gray pattern touches the gamma. Therefore, it is necessary to align the Cut-off of the Toshiba pattern to the first/second row of the gray pattern. gray pattern.
3)The adjustment sequence of the gray scale (1) Drive the 11 gray patterns (2) Measured the input/output gain voltage (Adjust the video gain to 100%) -->point :dptv의 G-OUT (R315) * As mentioned above, check the gain voltage when you change the pattern, then adjust. * 0.9v~ 1v (3)After perform the factory mode, spread the gamma data.(iw dc 71 00) (4)Adjust the each steps to match with the adjustment spec (x:282, y:283) -Adjust by using the sub address in Do not adjust 45 & 63 the above.
2.Gamma Correction Setting 1)MN82860 Gamma Correction Setting Gamma Correction (17") Gamma Correction (15") Subaddress Spl1 Spl2 Spl3 Spl4 Spl5 Spl1 Spl2 Spl3 Spl4 Spl5 Remarks 33h' 95 A0 Contrast control 36h' 1C 10 Brightness Control 3Bh' E1 DD Red Gain 3Ch' C7 C8 3Dh' FF FF RGB Gain Control Y cd/m2 98.1 Green Gain Blue Gain Condition of the full white gamma off 3Eh' 7E 86 Red Cut-off 3Fh' 75 77 40h' 80 80 Y cd/m 2.0 3.
5. Troubleshooting 1 No Power Does proper DC 14V appear at DC jack connected to CN801? No WAVEFORMS Check SMPS PCB and Adapter. 1 IC811 #2 2 IC805 #1 3 IC812 #2 Yes Does proper DC 3.3V_A appear at FT852? No Check IC811. Yes Does proper DC 2.5V_A appear at Pin 3 of IC802? No Check IC802. Yes Does proper DC 3.3V_B appear at FT822? No Check IC805. Yes Does proper DC 2.5V_B appear at Pin 4 of IC806? Yes Check IC812. LTM1575W/LTM1775W No Check IC806.
CONFIDENTIAL Troubleshooting 2 No Video (PC Signal) Power indicator is green. Yes Does the signal appear at C491, C489, C488 of R, G, B input? No Check CN401 and cable. Yes Does the clock pulse appear at output of RA351 ~ RA356? No Check related circuit of IC350. Yes Does the clock pulse appear at R354? No WAVEFORMS Check R354 and related circuit of R354. 4 X201 Yes Does the clock pulse appear at X201? No Check X201 and related circuit of X201.
CONFIDENTIAL Troubleshooting 3 No Picture (TV, Video, S-Video, DVD, DTV) Check Pin 185, 196 (S-Video) and Pin 184 (VCR) and Pin 183 (RF-CVBS) of IC200 (DPTV_3D). No Check the CN888 (Tuner) and the CN702-1 (VCR connector). No Check the IC200 and related circuit of IC200. Yes Does the signal appear at IC200 and +3.3V_BA? Yes Check the IC200, C285, C241 and C249.
CONFIDENTIAL Troubleshooting 4 No Sound Does the signal appear at Pin 67 (Tuner sound signal) and Pin 47, 48 (PC sound) and Pin 56, 57 (VCR sound) and Pin 53, 54 (DVD) Pin 50, 51 (DTV) of IC 919 (MSP3421)? No Check the CN403 (PC conector) and the CN402 (VCR connector) and the CN200 (DVD) and the CN888 (Tuner). No Check the IC919 and related circuit of IC919. No Check the IC501 (Audio amp) and related circuit of IC501.
Extra TROUBLESHOOTING If the TV seems to have a problem, first try this list of possible problems and solutions. If none of these troubleshooting tips apply, call your nearest service center. Identifying Problems Problem Poor picture Poor sound quality. No picture or sound. No color, wrong colors or tints. Picture rolls vertically. The TV operates erratically. The TV won’t turn on. Blurred or snowy picture, distorted sound Remote control malfunctions “Check Signal Cable” message.
TROUBLESHOOTING Problem “Not Supported Mode!” message. The image is too light or too dark. Horizontal bars appear to flicker, jitter or shimmer on the image. Vertical bars appear to flicker, jitter or shimmer on the image. Screen is black and power indicator light blinks steadily. Image is not stable and may appear to vibrate. Image is not centered on the screen. You need the Monitor driver software. TROUBLESHOOTING Possible Solution Check the maximum resolution and the frequency of the video Adapter.
8. General Informations of LCD 1. History of the LCD (Liquid Crystal Display) LCD, a display device, has been started to adapt for a calculator, display part of watch, and electronic note-book, and nowadays, it is adapted for a PC, Workstation, Liquid crystal color TV, monitor, game device, and so on with a tendency of larger size, larger capacity, and colorization. Liquid crystal has been starting to use as a display device since R. Williams at RCA co.
☞ Viewing angle: The LCD has a characteristic that the contrast ratio is changed by angle of the viewing point. The changing degree is shown by the viewing angle. The viewing angle is expressed as an angle over than certain value of the contrast ratio according to top, bottom, right, and left position. In a LCD cell, the transmissivity is sharply changed due to the angle of the incoming light.
screen. Therefore, the STN (Super TN) LCD is developed. STN LCD has several merits compare to TN such as higher productive efficiency, suitable for lager screen, wider viewing angle, and higher contrast. The Sharp presented the word processor “WD-250” with STN LCD in 1986. It was the beginning to rapidly distribute the LCD and to develop the word processor and PC. Nevertheless, the STN LCD uses two display colors, yellow and blue, to get enough luminosity for high contrast.
the gray scale. With the only On and Off state, just 8 colors can be displayed, but with the gray scale, more colors can be displayed. The capacity of it is still not as good as CRT. Because LCD has passive matrix construction, it is not suitable for moving pictures in fact of high quality picture, high contrast, and high-speed response. Development of the high capacity color LCD is needed for emulating the existing screen.
TFT_LCD has to be twice more than STN_LCD to make differences between the signals (On/Off), so it must be under 8ms. Nevertheless, it is a just theoretical numerical value. For driving moving picture, actually it has to be 2 or 3 times faster than that. ☞ Contrast ratio: The contrast ratio(C/R) is the scale to decide whether the image is clearly appeared or not. It will be clearer when the difference of the luminance is bigger.
☞ LC cell: It consists of two glass plates, and it is a construction part of LCD element inserted between the plates. Inside of the plates, transparent electrodes exist to construct picture element, and above it, an alignment film plate exists for aligning LC molecule in one direction. The active procession LCD is formed at the lower substrate, and the active elements (diode and transistor) are formed at the side of the picture element.
words, making one characteristic better would make other characteristic worth. Therefore, there is a limit to make all characteristics highly efficient. The worst weakness is a problem of cross-talking, but active matrix can enhance the ability of display by adding a switch element into each picture element. ☞ Cross Talk: It is a signal interruption between elements. For example, the display signal is distorted in the unselected picture element row, and it makes low C/R value.
molecules are arranged in parallel near to the both substrate surfaces, and both substrates are twisted 90 degree against each other (called ‘twisted molecule arrangement’). Therefore, the liquid crystal molecules are twisted 90 degree between both substrates in succession, and the light advances in the same direction with the molecules. As shown in the figure, if the molecules are twisted 90 degrees, the light takes same direction with the molecules in twisted 90 degrees.
☞ Polarizing film: Light is vibrated by electromagnetic wave, and the electronic field and magnetic field are vibrated vertically to the operating direction. The vibrating direction of the light from the backlight of the LCD module has same probability to the all direction. The polarizing film transmits the light vibrated same direction of the polarizing axis, and it absorbs with proper medium or reflects the rest of the light vibrated to other directions to make the light in specific direction.
green and blue, to express colors. The RGB color filters are arranged closely to each other, and each color signal is applied to the color filter for controlling the brightness to express colors. The voltage applied to the element is controlled for managing the brightness to express various colors. If the liquid crystal has only two functions such as cutting off light and passing light completely (red, green, blue = 1bit respectively), 8 colors (2 to the third power) can be expressed.
the limit. Due to the fact, there are more possibilities of creating signal distortion and EMI. In addition, as vertical resolution is getting higher, time allowed for one horizontal line becomes shorter. Time for charging data voltage into picture element is the same as time for one horizontal line. If the time gets shorter than a certain level, charging process cannot be achieved completely which leads to bad picture quality.
Assembly composed of these units is called TFT_LCD module. ☞ Backlight: Light is sent from backside. Liquid crystal cannot make light itself, so it controls the amount of light from backlight to display various colors. Therefore, the backlight function has deep relation with luminance. As backlight is better, luminance is higher. Two tubes looks like fluorescent lamp are installed horizontally, and send light over the screen evenly.
TFT_LCD module has display function, and it is a subsystem of the systems such as a notebook PC, TV, or monitor. [Construction of the TFT-LCD module] * Principle of LCD drive* 1) a) Black Matrix: It cuts off the light from the R,G, and B element. It is formed in among pixels of color filters and absorbs the light coming from the outside to prevent the reflection. b) Color Filter: It is a resin film containing dyeing stuff or pigments of primary colors (red, green, and blue).
h) Picture element electrode: It is transparent and made of electric-conductive ITO . It adds the signal voltage given by TFT to liquid crystal cells. i) TFT: It is a switching element to give or cut off the signal voltage to liquid crystal. j) Storage Capacitor: It maintains the signal voltage given to pixel ITO more than a certain time. 2) Backlight unit It makes a plane light with even luminosity from a fluorescent lamp used as the light resource.
follows. 1) TFT array process to make switch elements, which give pixel unit signal. 2) Color filter process to make color array of red, green, and blue for expression of colors. 3) Liquid crystal process to make liquid crystal cells in between TFT substrate and color filter substrates. The STN LCD is adopted for the LC cellular phone or car navigation, monitors, and so on, and the TFT LCD is adopted for Note PC monitor, desktop monitor, and so on.
☞ Viewing angle: It is one of LCD’s weakness. It is no problem to watch the 120°of right and left and 110°of top and bottom. But, if many people watch one screen, the color is turning over due to the changing viewing point with moving a head little bit to the top, bottom, right, or left. Especially, as size is larger, the viewing angle must be bigger; therefore, the technical development is necessary for larger screen.
☞ Consumption power: If CRT has 105w and LCD has 35w, the LCD’s consumption power is 33% of the CRT’s. For example, If PC is used 8 hours per a day for year, the consumption power of the CRT monitor will be 306,600w (105x8x365=306,600w), and the consumption power of the LCD monitor will be 102,200w (35x8x365=102,200w). If the average electric charge is 75won per 1kw/h, the consumption power for year will be 22,995won (306,600x75=22,995) for CRT and 7,665won (102,200x75=7,665) for LCD.
has thicker glass of panel. It means that the weight is heavier for the female user and children user. ☞ Size: It is a just numeric value. CRT monitor: 420x443x466=86,703,960 LCD monitor: 405x182x361=26,609,310 The size ratio of the LCD monitor is about 30% of the CRT monitor, so it saves a space as much as the percentage.
there are some problems, it could be about the unequal brightness or unequal white, or missing pixel due to inferiority of TFT at each picture element. ☞ Managing surface: The general management of CRT surface is anti reflection and anti static management. There are two methods, coating and attaching film. The coating method is difficult to coat over the flat evenly, so film method is invented. The surface of the Samtron 75DF is treated with Multi-layer film with ARAS.
▶ Clean image at every part of the screen. (Even at the edge) - In comparison with CRT monitor, it expresses an image vividly. It is comfortable to use visually for long time use. ▶ No screen flickering - There is no flickering screen because individual active elements exist in each picture element. There is no tiredness of eyes for long-term work. ▶ Almost no electron wave is occurred. - In comparison with the CRT monitor, almost no electron wave, which may harm human body, is occurred.
CDT such as thinner thickness, no flickering screen, etc. 4. Analog monitor and Digital monitor ▶ The trend of the monitor market in the world Desktop monitor is divided into two big parts, CRT monitor and TFT_LCD monitor. According to the statistics in 1999, CRT monitor owns 95% of market share, and the LCD owns only 5%. According to the statistics, the 15% (which is not small percentage) of reason to choose it is for digital interface.
▶ Relationship in changing signals between Digital monitor and analog monitor. The LCD monitor with analog input method converts the data from PC to analog at the graphic board, and coverts it to the digital to the LCD monitor. Such processes occur the information loss and make to adopt unnecessary parts, which is the fact to raise its price. It is reasonable that low demand of LCD due to such additional cost.
trend, the digital monitor is introduced from North America, Japan, and Europe. Domestic manufacturin g companies also make digital monitors. The digital monitor’s market share will be expanded in the future. ▶ Why aren’t there many digital monitors? The reasons that the digital monitor cannot be popular are: first, as mentioned above, the analog market is too big, and the manufacturing companies don’t invest for it. Second, there is no standardization for wider use.
Recently, to make up for such weaknesses, DVI (Digital Video Interface) is being watched for VGA interface and counting on for marketability. DVI is developed by DWG (digital display working group), which includes many companies related in DFP. DVI has possibility to be a standard due to its interface using TMDS protocol as P&D and DFP.
will be improved by skipping two signal conversions. ▶ Products with DVI Let’s see digital monitors introduced in Comdex show on Nov., 1999. All prices are standardization on Nov., 1999. The digital CRT monitor produced by Samsung is 21 Syncmaster 990 DVI. The 21 Syncmaster 990 DVI is CRT monitor, and it supports high resolution (UXGA level (1600x1280)) and either of digital signal and analog signal. Price is about 1,450,000 won.
Nevertheless, the importance of digital monitor is getting serious as all information is getting digitalized. The demand of monitor for digital interface is getting bigger over the world. 5. Summery of TFT_LCD monitor terms TFT-LCD (Thin film transistor liquid crystal display) is a display method of that liquid crystal is filled in between two glass plates.
horizontal and vertical Sync to the green among the hue signals. It is mainly used for workstation. ☞ Saturation - It is a degree of difference determined from white (standard) to own color. As the saturation is bigger, color is getting near to its own color. ☞ Hue - Red, green and blue ☞ Vertical frequency - Monitor repeats the same picture several tens in a second like fluorescent lamp. The repeating degree to express picture in a second is called vertical frequency or reflash rate. Unite is Hz.
Example) If resolution is 1,024x768, it is consisted of 1,024 dots (horizontal resolution) and 768 lines (vertical resolution). ☞ Back Light - LCD cannot make light itself, so it needs light from external. It is a light source located in the backside of liquid crystal panel. ☞ Aperture Ratio - It tells possible area ratio of LCD for displaying information out of whole screen. As the aperture ratio is larger, picture elements take more area, so luminosity becomes better.
CONFIDENTIAL 9. Schematic Diagrams 1 CPU Block & Signal Processing Part Schematic Diagram TO DPTV PARALLEL COMM TO DPTV DIGITAL INPUT MCAD(0:7) MCAD(0:7) MCA(0:19) C620 100nF E-PROM DGND #40 ex3 22 FROM DPTV R355 22 R367 22 #RESET IC OUTPUT DCLK HS 4 #41 ex4 RA608 RA609 C612 16V 10uF VS GND_D CVBS_OUT R604 560 1/16W R609 10K C609 100nF R944 2K 1/16W C608 5.6nF 50V MO R612 R613 1.5K 1.
CONFIDENTIAL Schematic Diagrams 2 LCDTV DPTV & 82860 Part Schematic Diagram A 2 1 B FT221 +2.5_BA B 2 1 A FT222 A B 1 2 A FT253 C294 33pF 50V MO 1 2 B FT254 A C293 33pF 50V MO C292 33pF 50V MO 1 2 B FT223 C291 33pF 50V MO C290 33pF 50V MO +3.3V_BD 1 A 2 B FT255 +3.3V_BD GND_D 1 C202 100nF 3 C B2 T903 C 3 T902 C201 100nF B A T901 1 1 +3.
CONFIDENTIAL Schematic Diagrams 3 LCDTV DC Power Input, Sound, Tuner, ETC Part Schematic Diagram TO SPEAKER CN501 slcon2p CN502 slcon3p + - C849 D 3 2 VIN 1 C815 120uF 6.3V SD SENSE C828 22uF 17 BLM41P600S VOUT 3 T801 T501 15 100 1/16W +5V_A 1 1 T502 R512 5.1KOHM 6.8KOHM CN01 slcon12p R513 5.1KOHM 6.8KOHM Q002 2SC2412K-Q C003 22uF 16V C B HS_EMI 1 SUPLVAL 4 C827 120uF 6.3V GND 5 D805 MBRM130LT3 2K 1/16W FT851 IC802 LP3961EMP-2.5 2 1 1 100uH R807 R806 1.
CONFIDENTIAL 10 Schematic Diagrams 1 IC811 #2 LTM1575W/LTM1775W 2 IC805 #1 3 IC812 #2 10-5
24C02C 2K 5.0V I2C™ Serial EEPROM FEATURES PDIP/SOIC A0 1 A1 2 A2 3 Vss 4 24C02C 8 Vcc 7 WP 6 SCL 5 SDA TSSOP A0 A1 1 A2 VSS 3 4 24C02C • Single supply with operation from 4.5 to 5.5V • Low power CMOS technology - 1 mA active current typical - 10 µA standby current typical at 5.
24C02C 1.0 1.1 ELECTRICAL CHARACTERISTICS TABLE 1-1: PIN FUNCTION TABLE Name Maximum Ratings* VCC ........................................................................7.0V All inputs and outputs w.r.t. VSS .....-0.6V to VCC +1.0V Storage temperature ..........................-65°C to +150°C Ambient temp. with power applied......-65°C to +125°C Soldering temperature of leads (10 seconds) .. +300°C ESD protection on all pins .....................................
24C02C TABLE 1-3: AC CHARACTERISTICS All parameters apply across the specified operating ranges unless otherwise noted. Parameter Symbol Vcc = 4.5V to 5.5V Commercial (C): Industrial (I): Automotive (E): Tamb = 0°C to +70°C Tamb = -40°C to +85°C Tamb = -40°C to +125°C Tamb > +85°C -40°C ≤ Tamb ≤ +85°C Min. Max. Min. Max.
Multimedia ICs Input selector switch for high definition displays BA7657F / BA7657S The BA7657F and BA7657S are for high definition displays, and have internal switches for switching between broadband RGB signals and HD / VD signals, as well as an internal synchronization separator. These ICs simplify the designing of input units for deluxe displays. Applications •CRT display, HDTV, video board for personal computer, etc. •1)Features Operates on a single 5V power supply. 3) Internal HD / VD switch.
Multimedia ICs BA7657F / BA7657S •Block diagram 24 HD 1 input 2 23 HD 2 input Green 1 input 3 22 HD output Ground 4 21 Red output 20 VCC 19 Green output 18 Composite video input (Sync on Green) 17 Composite sync output 16 CTL (H: IN1, L: IN2) 15 Blue output 14 VD output 13 VD 2 input Red 1 input 1 HD Sync signal detector 1 2 1 2 Blue 1 input 5 Ground 6 DET 1 2 Red 2 input 7 Syncsepa Ground 8 Green 2 input 9 Logic 1 Ground 10 Blue 2 input 11 2 1 2 VD 1
Multimedia ICs BA7657F / BA7657S •Pin descriptions Pin No. Pin name 1 Red 1 input 2 Function Pin No.
Multimedia ICs BA7657F / BA7657S Control HD. VD output VCC 2.0k VCC 100 35k 1k 16pin 15k 14, 22pin 50k 15k 1.
Revised January 2001 FST3125 4-Bit Bus Switch General Description Features The Fairchild Switch FST3125 provides four high-speed CMOS TTL-compatible bus switches. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. ■ 4Ω switch connection between two ports. The device is organized as four 1-bit switches with separate OE inputs. When OE is LOW, the switch is ON and Port A is connected to Port B.
FST3125 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 3) Supply Voltage (VCC ) −0.5V to +7.0V DC Switch Voltage (VS) −0.5V to +7.0V Power Supply Operating (VCC) DC Input Voltage (VIN)(Note 2) −0.5V to +7.0V Input Voltage (VIN) 0V to 5.5V 0V to 5.5V DC Input Diode Current (lIK) VIN<0V −50mA Output Voltage (VOUT) DC Output (IOUT ) Sink Current 128mA Input Rise and Fall Time (tr, tf) +/− 100mA DC VCC/GND Current (ICC/IGND) Storage Temperature Range (TSTG) 4.
TA = −40 °C to +85 °C, CL = 50pF, RU = RD = 500Ω Symbol Parameter VCC = 4.5 – 5.5V Min tPHL,tPLH Prop Delay Bus to Bus (Note 6) tPZH, tPZL Output Enable Time VCC = 4.0V Max Min Units Conditions Max 0.25 0.25 ns VI = OPEN 5.0 5.5 ns VI = 7V for tPZL 1.0 Figures 1, 2 VI = OPEN for tPZH tPHZ, tPLZ Output Disable Time 1.5 Figure No. 5.3 5.6 ns VI = 7V for tPLZ VI = OPEN for tPHZ Figures 1, 2 Figures 1, 2 Note 6: This parameter is guaranteed by design but is not tested.
DS90C385/DS90C365 +3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display (FPD) Link-85 MHz, +3.3V Programmable LVDS Transmitter 18-Bit Flat Panel Display (FPD) Link-85 MHz General Description The DS90C385 transmitter converts 28 bits of LVCMOS/ LVTTL data into four LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link.
DS90C385/DS90C365 Absolute Maximum Ratings (Note 1) DS90C385SLC Package Derating: DS90C385MTD Package Derating: DS90C365MTD DS90C385SLC ESD Rating (HBM, 1.5kΩ, 100pF) (EIAJ, 0Ω, 200 pF) Latch Up Tolerance @ 25˚C If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) −0.3V to +4V CMOS/TTL Input Voltage −0.5V to (VCC + 0.3V) LVDS Driver Output Voltage −0.3V to (VCC + 0.
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ESMT Synchronous Graphic RAM ! ! ! ! ! ! ! ! ! ! $ ( ( (,#" ) ::-) - ( & % !"$ % ; ( !"# :(-) (..
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M74HC32 QUAD 2-INPUT OR GATE ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 8ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC = 1µA(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = V NIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 32 DESCRIPTION The M74HC32 is an high speed CMOS QUAD 2-INPUT OR GATE fabricated with silicon gate C2MOS technology.
M74HC32 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL 1, 4, 9, 12 2, 5, 10, 13 3, 6, 8, 11 7 1A to 4A 1B to 4B 1Y to 4Y GND VCC 14 NAME AND FUNCTION Data Inputs Data Inputs Data Outputs Ground (0V) Positive Supply Voltage TRUTH TABLE A B Y L L H H L H L H L H H H ABSOLUTE MAXIMUM RATINGS Symbol V CC Parameter Supply Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.
M74HC32 DC SPECIFICATIONS Test Condition Symbol VIH V IL VOH VOL II ICC Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Quiescent Supply Current Value TA = 25°C VCC (V) Min. 2.0 4.5 6.0 2.0 Typ. Max. 1.5 3.15 4.2 -40 to 85°C -55 to 125°C Min. Min. Max. 1.5 3.15 4.2 4.5 6.0 Max. 1.5 3.15 4.2 V 0.5 0.5 0.5 1.35 1.8 1.35 1.8 1.35 1.8 2.0 IO=-20 µA 1.9 2.0 1.9 1.9 4.5 IO=-20 µA 4.4 4.
SDA 55xx Overview Preliminary & Confidential CMOS 1.5 Features General • Feature selection via special function register • Simultaneous reception of TTX, VPS, PDC, and WSS (line 23) • Supply Voltage 2.5 and 3.3 V • ROM version package P-SDIP 52, P-MQFP64 • Romless version package P-MQFP100,P-LCC84 P-SDIP-52 External Crystal and Programmable clock speed • Single external 6MHz crystal, all necessary clocks are generated internally • CPU clock speed selectable via special function registers.
SDA 55xx Overview Preliminary & Confidential Memory • • • • • • • Non-multiplexed 8-bit data and 16 … 20-bit address bus (ROMless Version) Memory banking up to 1Mbyte (Romless version) Up to 128 Kilobyte on Chip Program ROM Eight 16-bit data pointer registers (DPTR) 256-bytes on-chip Processor Internal RAM (IRAM) 128bytes extended stack memory.
SDA 55xx Overview Preliminary & Confidential Acquisition Features • • • • • • • • • • • Multistandard Digital Data Slicer Parallel Multi-norm Slicing (TTX, VPS, WSS, CC, G+) Four Different Framing Codes Available Data Caption only Limited by available Memory Programmable VBI-buffer Full Channel Data Slicing Supported Fully Digital Signal Processing Noise Measurement and Controlled Noise Compensation Attenuation Measurement and Compensation Group Delay Measurement and Compensation Exact Decoding of Echo Di
SDA 55xx Overview Preliminary & Confidential 1.6 Logic Symbol vcc(2.5,3.
Semiconductor Group 16 6)5V 8$57 3RUW /RJLF 3:0 &DSWXUH FRQWURO :'7 6\VWHP 6\QF &ORFN ,QWHUIDFH %XV 3HULSKHUDO LQWHUIDFH $'& ; ,5$0 Counter 1 Counter 0 ; 0HPRU\ ([WHQVLRQ 6WDFN A[16 to A20] Interrupt Controller Core 0 6 Memory Extension Unit ADCX4 .
TFT-LCD Monitor 1. What is TFT-LCD TV (Monitor)? It is a TV (Monitor) with display element of TFT-LCD. It is a new concept TV (Monitor) compared to the existing CRT TV (Monitor) in the fact of reducing space and consumption power. 2. Construction of the TFT-LCD TV (Monitor) TFT-LCD Panel Module Inverter SDRAM FRC L V D S Scaler To Panel To Panel Inverter To Func. Brd. ADC Micom DC-DC From PC 3.
Common transparent electrode Polarizing film Glass substrate TN liquid crystal TFT substrate Transparent display electrode Polarizing film 1) Panel의 기능은 Backlignt Unit에서 입사된 백색 평면관을 구동 회로 Unit으로부터 입력된 개개 화소의 신호전압에 따라 화소에 투과되는 빛을 제어하여 Color영상을 표현하는 역할을 한다. 2)BackLight Unit It makes a plane light, which has even luminosity, from a fluorescent lamp used as the light resource.
■ ADC (Analog to Digital Converter) It is a circuit to covert the inputted analog signal from PC to the digital signal for using it at the end of ADC. It is important to determine a picture quality. parts: AMP unit, AD unit, and PLL unit. adjust the gain. ADC consists of three AMP unit amplifies the inputted analog signal to AMP is necessary for expressing the precise gray because the difference of gain among PCs is existed.
