sx150x_89b-datasheet

ManualsBrandsSmart Prototyping ManualsIO Expansion & ADCsZio Qwiic IO Expander (16 Channels)

ADVANCED COMMUNICATIONS & SENSING

Rev 4 – 26

April 2011 1 www.semtech.com

SX1508B/SX1509B

World’s Lowest Voltage Level Shifting GPIO

with LED Driver and Keypad Engine

SX1508B/SX1509B

World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine

ENERAL

ESCRIPTION

The SX1508B and SX1509B are complete ultra low

voltage General Purpose parallel Input/Output (GPIO)

expanders ideal for low power handheld battery

powered equipment. This family of GPIOs comes in

8-, 16-channel configuration and allows easy serial

expansion of I/O through a standard 400kHz I

interface. GPIO devices can provide additional control

and monitoring when the microcontroller or chipset

has insufficient I/O ports, or in systems where serial

communication and control from a remote location is

advantageous.

These devices can also act as a level shifter to

connect a microcontroller running at one voltage level

to a component running at a different voltage level,

thus eliminating the need for extra level translating

circuits. The core is operating as low as 1.425V while

the dual I/O banks can operate between 1.2V and

3.6V independent of the core voltage and each other

(5.5V tolerant).

The SX1508B and SX1509B feature a fully

programmable LED Driver with internal oscillator for

enhanced lighting control such as intensity (via 256-

step PWM), blinking and breathing (fade in/out) make

them highly versatile for a wide range of LED

applications.

In addition, keypad applications are also supported

with an on-chip scanning engine that enables

continuous keypad monitoring up to 64 keys without

any additional host interaction reducing bus activity.

The SX1508B and SX1509B have the ability to

generate mask-programmable interrupts based on a

falling/rising edge of any of its GPIO lines. A

dedicated pin (NINT) indicates to a host controller

that a state change occurred on one or more of the

lines. Each GPIO is programmable via a bank of 8-bit

configuration registers that include data, direction,

pull-up/pull-down, interrupt mask and interrupt

registers. These I/O expanders feature small footprint

packages and are rated from -40°C to +85°C

temperature range.

RDERING

NFORMATION

Part Number I/Os

Package Marking

SX1508BIULTRT

8 QFN-UT-20 GAA2

SX1509BIULTRT

16 QFN-UT-28 GBA3

SX1508BEVK 8 Evaluation Kit

SX1509BEVK 16 Evaluation Kit

RODUCT

EATURES

• 1.2V to 3.6V Low Operating Voltage with Dual

Independent I/O Rails (VCC1, VCC2)

 Enable Direct Level Shifting Between I/O

Banks and Host Controller

• 5.5V Tolerant I/Os, Up to 15mA Output Sink on

All I/Os (No Total Sink Current Limit)

• Integrated LED Driver for Enhanced Lighting

 Intensity Control (256-step PWM)

 Blink Control (224 On/Off values)

 Breathing Control (224 Fade In/Out values)

• On-Chip Keypad Scanning Engine

 Support Up to 8x8 Matrix (64 Keys)

 Configurable Input Debouncer

• 8/16 Channels of True Bi-directional Style I/O

 Programmable Pull-up/Pull-down

 Push/Pull or Open-drain outputs

 Programmable Polarity

• Open Drain Active Low Interrupt Output (NINT)

 Bit Maskable

 Programmable Edge Sensitivity

• Built-in Clock Management (Internal 2MHz

Oscillator/External Clock Input, 7 clock values)

 OSCIO can be Configured as GPO

• 400kHz I

C Compatible Slave Interface

• 4 User-Selectable I²C Slave Addresses

• Power-On Reset and Reset Input (NRESET)

• Ultra Low Current Consumption: 1uA Typ

• -40°C to +85°C Operating Temperature Range

• Up to 2kV HBM ESD Protection

• Small Footprint Packages

• Pb & Halogen Free, RoHS/WEEE compliant

YPICAL

PPLICATIONS

• Cell phones, PDAs, MP3 players

• Digital camera, Notebooks, GPS Units

• Any battery powered equipment

I2C

NRESET

NINT

VDDM

425

3.6V

VCC1

1.2

3.6V

VCC2

1.2

3.6V

SX1508

FULL LED DRIVE

KEYPAD SCANNING

BUTTON CONTROL

Host

Controller

IO0

IO1

IO2

IO3

IO4

IO5

IO6

IO7

ADDR0

ADDR1

OSCIO

LEVEL SHIFTING

Summary of content (37 pages)

PAGE 1
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine GENERAL DESCRIPTION KEY PRODUCT FEATURES The SX1508B and SX1509B are complete ultra low voltage General Purpose parallel Input/Output (GPIO) expanders ideal for low power handheld battery powered equipment.
PAGE 2
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Table of Contents GENERAL DESCRIPTION ..................................................................................................................... 1 ORDERING INFORMATION................................................................................................................... 1 KEY PRODUCT FEATURES....................................................................
PAGE 3
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 7.3 7.4 QFN-UT 28-pin Outline Drawing QFN-UT 28-pin Land Pattern 34 34 8 SOLDERING PROFILE .............................................................................................................. 35 9 MARKING INFORMATION ......................................................................................................... 36 th Rev 4 – 26 April 2011 3 www.
PAGE 4
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 1 1.
PAGE 5
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 1.
PAGE 6
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 1.3 I/Os Feature Summary SX1508B LED Driver I/O PWM 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 √ √ √ √ √ √ √ √ Blink √ √ √ √ Breathe Row √ √ √ √ √ √ SX1509B LED Driver Keypad Col. √ √ √ √ PWM Blink √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Keypad Breathe Row √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Col.
PAGE 7
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 2 ELECTRICAL CHARACTERISTICS 2.1 Absolute Maximum Ratings Stress above the limits listed in the following table may cause permanent failure. Exposure to absolute ratings for extended time periods may affect device reliability. The limiting values are in accordance with the Absolute Maximum Rating System (IEC 134). All voltages are referenced to ground (GND).
PAGE 8
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Symbol Description tPV Output data valid timing NINT (Output) VOL Low level output voltage IOLM Low level output sink current tIV Interrupt valid timing tIR Interrupt reset timing Conditions Cf. Figure 8 Min - Typ - Max 425 Unit ns VDDM >= 2V VDDM < 2V From input data change From RegInterruptSource clearing -0.4 - - 0.
PAGE 9
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Symbol fSCL Description SCL clock frequency Hold time (repeated) START tHD;STA condition tLOW LOW period of the SCL clock tHIGH HIGH period of the SCL clock Set-up time for a repeated tSU;STA START condition tHD;DAT Data hold time tSU;DAT Data set-up time tr Rise time of both SDA and SCL tf Fall time of both SDA and SCL tSU;STO Set-up time for STOP condition Bus free time between
PAGE 10
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 3 TYPICAL OPERATING CHARACTERISTICS SX1509B IDDM vs.VDDM (Oscillator Enabled) SX1509B IDDM vs.VDDM (Oscillator Enabled) 360 340 340 320 320 300 300 280 280 260 260 ID D M (u A ) I D D M (u A ) 360 240 240 220 220 200 200 180 180 160 160 140 140 120 120 100 100 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 1.3 1.5 1.7 1.9 2.1 2.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 4 4.
PAGE 12
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 4.3 Reset 4.3.1 Hardware (NRESET) The SX1508B and SX1509B generate their own power on reset signal after a power supply is connected to the VDDM pin. NRESET input pin can be used to reset the chip anytime, it must be connected to VDDM (or greater) either directly (if not used), or via a resistor.
PAGE 13
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 2 2 The SX1508B and SX1509B are read-write slave-mode I C devices and comply with the Philips I C standard Version 2.1 dated January, 2000. The SX1508B and SX1509B have a few user-accessible internal 8-bits registers to set the various parameters of operation (Cf. §5 for detailed configuration registers description).
PAGE 14
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Figure 9 - 2-Wire Serial Interface, Read Operation When successive register data (RD1...RDn) is read by the master, the register address will be automatically incremented or kept fixed depending on the setting programmed in RegMisc. 4.5 4.5.1 I/O Banks Input Debouncer Each input can be individually debounced by setting corresponding bits in RegDebounce register.
PAGE 15
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING • The row data will be stored in RegKeyData[3:0] (Note: row indication is active low) • When RegKeyData is read, this data along with the interrupt is automatically cleared (same behavior as reading RegData) and the key scan continues to the next row. 5. Restart from point 4.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING IO Input Delay vs. Supply Voltage 10.000 9.000 8.000 (ns) 6.000 Tdelay 7.000 5.000 4.000 3.000 2.000 1.000 0.000 1.000 1.500 2.000 2.500 3.000 3.500 VCCx (V) Typical Worst Case SX1509B Digital Core Delay vs. Supply Voltage 26 26 24 24 (ns) 22 22 20 Tdelay (ns) 28 28 Tdelay SX1508B Digital Core Delay vs. Supply Voltage 20 18 18 16 16 14 14 1 1.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING RegInterruptMask =“XXXXXX0X” 2. We set edge sense for I/O[1] in RegSense RegSenseLow =“XXXX01XX” Please note that independently from the “user defined” process described above the keypad engine, when enabled, also uses NINT to indicate a key press. Hence we have NINT = “user defined condition occurred” OR “keypad engine condition occurred”. 4.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING RegData[X] 1 0 t IO[X] Intensity (PWM value) 100% ON IOnX Fade In Fade Out OFF IOffX 0 TRiseX TOnX TFallX t TOffX Figure 14 – LED Driver Overview Each IO[X] has its own set of programmable registers (Cf §5 for more detailed information): RegTOnX (blinking capable I/Os only): TOnX, ON time of IO[X] RegIOnX (all I/Os): IOnX, ON intensity of IO[X] RegOffX (blinki
PAGE 19
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING RegData(X) On intensity(max) IOLED(X) level Off intensity(min) Fade in rate determined by register RegTRiseX Minimum intensity duration determined by register RegData(x) Fade out rate determined by register RegTFallX Figure 16 – LED Driver Single Shot Mode 4.8.4 Blink Mode Invoked when TOnX != 0 and TOffX != 0.
PAGE 20
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 7 7 7 8 8 8 8 9 9 9 9 10 10 10 10 11 11 12 12 77 18 109 36 141 65 173 104 78 19 110 38 142 65 174 104 79 19 111 38 143 65 175 104 80 20 112 39 144 69 176 110 81 20 113 39 145 69 177 110 82 21 114 41 146 69 178 110 83 21 115 41 1
PAGE 21
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING - Enable open drain (RegOpenDrain) Set direction to output (RegDir) – by default RegData is set high => LED OFF Enable oscillator (RegClock) Configure LED driver clock and mode if relevant (RegMisc) Enable LED driver operation (RegLEDDriverEnable) Configure LED driver parameters (RegTOn, RegIOn, RegOff, RegTRise, RegTFall) Set RegData bit low => LED driver started th Rev 4 – 26
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 5 5.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Addr Name Default Bits 7:6 5:4 3:2 1:0 7:6 5:4 3:2 1:0 Disables the input buffer of each IO 0 : Input buffer is enabled (input actually being used) 1 : Input buffer is disabled (input actually not being used or LED connection) Enables increased slew rate of the output buffer of each [output-configured] IO 0 : Increased slew rate is disabled 1 : Increased slew rate is enabled E
PAGE 24
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 6:4 3 2 1 0 0x11 RegLEDDriverEnable 0x00 7:0 7:3 0x12 RegDebounceConfig 0x00 0x13 RegDebounceEnable 0x00 2:0 7:0 7 6:5 4:3 0x14 RegKeyConfig 0x00 2:0 0x15 RegKeyData 0xFF 7:0 7:5 0xXX RegTOnX 0x00 0xXX RegIOnX 0xFF 0xXX RegOffX 0x00 4:0 7:0 7:3 2:0 7:5 0xXX RegTRiseX th Rev 4 – 26 April 2011 0x00 4:0 Frequency of the LED Driver clock ClkX
PAGE 25
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 7:5 0xXX RegTFallX 0x00 0x2A RegHighInput 0x00 7:0 0x7D RegReset 0x00 7:0 4:0 Unused Fade Out setting of IO[X] 0 : OFF 1 - 15 : TFallX = (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX) 16 - 31 : TFallX = 16 * (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX) Enables high input mode for each [input-configured] IO 0 : OFF. VIH max = 3.6V and VCCx min = 1.2V 1 : ON.
PAGE 26
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 5.
PAGE 27
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Address Name 0x39 RegTFall4 0x3A RegTOn5 0x3B RegIOn5 0x3C RegOff5 0x3D RegTRise5 0x3E RegTFall5 0x3F RegTOn6 0x40 RegIOn6 0x41 RegOff6 0x42 RegTRise6 0x43 RegTFall6 0x44 RegTOn7 0x45 RegIOn7 0x46 RegOff7 0x47 RegTRise7 0x48 RegTFall7 0x49 RegTOn8 0x4A RegIOn8 0x4B RegOff8 0x4C RegTOn9 0x4D RegIOn9 0x4E RegOff9 0x4F RegTOn10 0x50 RegIOn10 0x51 RegOff10 0x52 RegTOn11 0x53 RegIOn11
PAGE 28
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING Addr Name Default Bits 0x00 RegInputDisableB 0x00 7:0 0x01 RegInputDisableA 0x00 7:0 0x02 RegLongSlewB 0x00 7:0 0x03 RegLongSlewA 0x00 7:0 0x04 RegLowDriveB 0x00 7:0 0x05 RegLowDriveA 0x00 7:0 0x06 RegPullUpB 0x00 7:0 0x07 RegPullUpA 0x00 7:0 0x08 RegPullDownB 0x00 7:0 0x09 RegPullDownA 0x00 7:0 0x0A RegOpenDrainB 0x00 7:0 0x0B RegOp
PAGE 29
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 5:4 3:2 1:0 0x18 0x19 0x1A 0x1B RegInterruptSourceB RegInterruptSourceA RegEventStatusB RegEventStatusA 0x00 0x00 0x00 0x00 0x1C RegLevelShifter1 0x00 0x1D RegLevelShifter2 0x00 7:0 Edge sensitivity of RegData[2] Edge sensitivity of RegData[1] Edge sensitivity of RegData[0] Interrupt source (from IOs set in RegInterruptMask) 0 : No interrupt has been triggered b
PAGE 30
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 0x21 RegLEDDriverEnableA 0x00 7:0 7:3 0x22 RegDebounceConfig 0x00 0x23 RegDebounceEnableB 0x00 7:0 0x24 RegDebounceEnableA 0x00 7:0 2:0 7 6:4 0x25 RegKeyConfig1 0x00 3 2:0 7:6 5:3 0x26 RegKeyConfig2 0x00 2:0 0x27 RegKeyData1 0xFF 7:0 0x28 RegKeyData2 0xFF 7:0 7:5 0xXX RegTOnX 0x00 0xXX RegIOnX 0xFF th Rev 4 – 26 April 2011 4:0 7:0 Enabl
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 7:3 0xXX RegOffX 0x00 2:0 7:5 0xXX RegTRiseX 0x00 4:0 7:5 0xXX RegTFallX 0x00 0x69 RegHighInputB 0x00 7:0 0x6A RegHighInputA 0x00 7:0 0x7D RegReset 0x00 7:0 4:0 OFF Time of IO[X]: 0 : Infinite (Single shot mode, TOff directly controlled by RegData, Cf §4.8.
PAGE 32
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 6 6.1 APPLICATION INFORMATION Typical Application Circuit OSCIO 3.3V VCC1 I/O[0] I/O[1] I/O[2] I/O[3] VDDM Host controller I/O 2.5V NRESET SX1508B SCL SCL SDA SDA I/O 5V 5V 1.2V VCC2 I/O[4] I/O[5] I/O[6] I/O[7] ADDR1 ADDR0 NINT GND Optional (depends on the application) Figure 19 - Typical Application Schematic 6.
PAGE 33
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 7 PACKAGING INFORMATION 7.1 QFN-UT 20-pin Outline Drawing QFN-UT 20-pin, 3 x 3 mm, 0.4 mm pitch Figure 21 - QFN-UT 20-pin Outline Drawing 7.2 QFN-UT 20-pin Land Pattern Figure 22 - QFN-UT 20-pin Land Pattern th Rev 4 – 26 April 2011 33 www.semtech.
PAGE 34
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 7.3 QFN-UT 28-pin Outline Drawing QFN-UT 28-pin, 4 x 4 mm, 0.4 mm pitch Figure 23 - QFN-UT 28-pin Outline Drawing 7.4 QFN-UT 28-pin Land Pattern Figure 24 - QFN-UT 28-pin Land Pattern th Rev 4 – 26 April 2011 34 www.semtech.
PAGE 35
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 8 SOLDERING PROFILE The soldering reflow profile for the SX1508B and SX1509B is described in the standard IPC/JEDEC J-STD020C. For detailed information please go to http://www.jedec.org/download/search/jstd020c.pdf Figure 25 - Classification Reflow Profile (IPC/JEDEC J-STD-020C) th Rev 4 – 26 April 2011 35 www.semtech.
PAGE 36
SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING 9 MARKING INFORMATION GAA2 yyww xxxx yyww = Date Code xxxx = Semtech Lot No. Figure 26 – SX1508B Marking Information GBA3 yyww xxxxx xxxxx yyww = Date Code xxxxx = Semtech Lot No. xxxxx Figure 27 – SX1509B Marking Information th Rev 4 – 26 April 2011 36 www.semtech.
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SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine ADVANCED COMMUNICATIONS & SENSING © Semtech 2011 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.