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SN75140

DUAL LINE RECEIVER

SLLS080C – JANUARY 1977 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Single 5-V Supply

±100-mV Sensitivity

For Application as:

– Single-Ended Line Receiver

– Gated Oscillator

– Level Comparator

Adjustable Reference Voltage

TTL Outputs

TTL-Compatible Strobe

Designed for Party-Line (Data-Bus)

Applications

Common Reference-Voltage Pin

Common Strobe

description

This device consists of a dual single-ended line receiver with TTL-compatible strobes and outputs. The

reference voltage (switching threshold) is applied externally and can be adjusted from 1.5 V to 3.5 V, making

it possible to optimize noise immunity for a given system design. Due to the low input current (less than 100 µA),

the device is suited ideally for party-line (data-bus) systems.

The SN75140 has a common reference-voltage pin and a common strobe.

The SN75140 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each receiver)

LINE INPUT

STROBE OUTPUT

≤ V

ref

– 100 mV L H

≥ V

ref

+ 100 mV X L

X H L

H = high level, L = low level, X = irrelevant

logic symbol

‡

COMSTRB

‡

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

1LINE

1OUT

≥1

2LINE

2OUT

≥1

COMREF

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1OUT

COMSTRB

1LINE

GND

2OUT

COMREF

2LINE

P OR PS

†

PACKAGE

(TOP VIEW)

†

The PS package is only available

left-ended taped and reeled (order

SN75140 PSR).

Summary of content (18 pages)

PAGE 1
SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 D D D D D D D D D P OR PS† PACKAGE (TOP VIEW) Single 5-V Supply ±100-mV Sensitivity For Application as: – Single-Ended Line Receiver – Gated Oscillator – Level Comparator Adjustable Reference Voltage TTL Outputs TTL-Compatible Strobe Designed for Party-Line (Data-Bus) Applications Common Reference-Voltage Pin Common Strobe 1OUT COMSTRB 1LINE GND 1 8 2 7 3 6 4 5 VCC 2OUT COMREF 2LINE † The PS package is only available left-
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 logic diagram (positive logic) COMSTRB 1LINE COMREF 2 1 3 6 7 2LINE 1OUT 2OUT 5 schematic (each receiver) 1500 LINE COMREF 750 1500 4000 4000 130 VCC To Other Line Receiver 1500 470 750 470 850 OUT 500 1000 2900 To Other Line Receiver GND To Other Line Receiver COMSTRB NOTE: Resistor values shown are nominal and in ohms.
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 recommended operating conditions MIN NOM MAX 4.5 5 5.5 V Supply voltage, VCC Reference input voltage, Vref UNIT 1.5 3.5 V Vref+0.1 0 VCC–1 Vref–0.1 V High-level strobe input voltage, VIH(S) 2 5.5 V Low-level strobe input voltage, VIL(S) 0 0.
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 PARAMETER MEASUREMENT INFORMATION ≤ 10 ns ≤ 10 ns 90% 2.5 V 2.5 V VCC LINE Output 10% 2.7 V 2.5 V 10% 2.3 V ≤ 10 ns RL = 400 Ω (see Note D) LINE COMSTRB COMSTRB (see Note B) ≤ 10 ns 1.5 V ÌÌÌ tPHL(L) 90% 10% 10% tPLH(S) VOH CL = 15 pF (see Note B) Output 1.5 V 1.5 V 1.5 V 1.
PAGE 5
SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 APPLICATION INFORMATION 5V Twisted-Pair Line Strobe Data Input OUT Strobe RT Vref 1/2 SN75372 1/2 SN75140 Figure 3. Line Receiver COMSTRB Any Series SN54/SN74 Logic N=1 1.5 V SN75140 N=2 COMSTRB N = 74 1.5 V SN75140 N = 75† † Although most series SN54/SN74 circuits have a >2.4-V output at 400 µA, they typically are capable of maintaining a >2.4-V output level under a load of 7.5 mA. Figure 4.
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 APPLICATION INFORMATION 5V RT (50 Ω to 100 Ω depending on line impedance) VCC = 5 V Data Bus Data In Data In Strobe 1/2 SN75453B VCC = 5 V 5V Data Out Vref = 1.5 V to 3.5 V Data Out Strobe 1/2 SN75140 NOTE A: Using this arrangement, as many as 100 transceivers can be connected to a single data bus. The adjustable reference-voltage feature allows the noise margin to be optimized for a given system.
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 APPLICATION INFORMATION OUTPUT VOLTAGE vs INPUT VOLTAGE 4 4 3.5 3.5 3 3 VO VO – Output Voltage – V V VO O – Output Voltage – V OUTPUT VOLTAGE vs INPUT VOLTAGE 2.5 2 1.5 1 0.5 0 ÌÌÌÌÌ ÌÌÌÌÌ ÌÌÌÌÌ 0.5 1 2 1.5 1 R1 = 6.2 kΩ RT = 3.9 kΩ RF = 16 kΩ TA = 25°C 0 2.5 0.5 0 1.5 2 2.5 3 VI – Input Voltage – V ÌÌÌÌÌ ÌÌÌÌÌ ÌÌÌÌÌ ÌÌÌÌÌ R1 = 5.9 kΩ RT = 3.9 kΩ RF = 5 kΩ TA = 25°C 0 0.5 1 1.5 2 2.
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SN75140 DUAL LINE RECEIVER SLLS080C – JANUARY 1977 – REVISED APRIL 1998 APPLICATION INFORMATION OSCILLATOR FREQUENCY vs RC TIME CONSTANT f osc – Oscillator Frequency – MHz 40 20 Vref = 1.5 V 10 7 Vref = 2.5 V 4 RF = 15 kΩ tw = 0.6 f VCC = 5 V TA = 25°C 2 0 0.1 0.2 0.4 0.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.com 7-Jun-2010 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN75140PSR Package Package Pins Type Drawing SO PS 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 8.2 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.6 2.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN75140PSR SO PS 8 2000 367.0 367.0 38.
PAGE 13
MECHANICAL DATA MCER001A – JANUARY 1995 – REVISED JANUARY 1997 JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.400 (10,16) 0.355 (9,00) 8 5 0.280 (7,11) 0.245 (6,22) 1 0.063 (1,60) 0.015 (0,38) 4 0.065 (1,65) 0.045 (1,14) 0.310 (7,87) 0.290 (7,37) 0.020 (0,51) MIN 0.200 (5,08) MAX Seating Plane 0.130 (3,30) MIN 0.023 (0,58) 0.015 (0,38) 0°–15° 0.100 (2,54) 0.014 (0,36) 0.008 (0,20) 4040107/C 08/96 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters).
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