PCA9537

4-bit I2C-bus and SMBus low power I/O port with interrupt and reset


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Product description

The PCA9537 is a 10-pin CMOS device that provides 4 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push-buttons, LEDs, fans, etc.

The PCA9537 consists of a 4-bit Configuration register (input or output selection), 4-bit Input Port register, 4-bit Output Port register and a 4-bit Polarity Inversion register (active HIGH or active LOW operation). The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input Port or Output Port register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

The PCA9537 open-drain interrupt output (INT) is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine. The RESET pin causes the same reset/initialization to occur without de-powering the device.

The I2C-bus address is fixed and allows only one device on the same I2C-bus/SMBus.

Features

  • 4-bit I2C-bus GPIO with interrupt and reset
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • 5 V tolerant I/Os
  • Polarity Inversion register
  • Active LOW interrupt output
  • Active LOW reset input
  • Low standby current
  • Noise filter on SCL/SDA inputs
  • No glitch on power-up
  • Internal power-on reset
  • 4 I/O pins that default to 4 inputs
  • 0 Hz to 400 kHz clock frequency
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Offered in TSSOP10 package
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram: PCA9537DP
Block diagram: PCA9537DP

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9537DPPCA9537DP,1189352 774 95118Volume productionSOT552-1
(TSSOP10) 		Reel Pack, SMD, 13"Standard Marking

Parametrics of this product

Type numberPackage# of BitsINTERRUPTSource Current per bit(mA)Weak Pull-Up Current Source Max Sink Current per bit(mA)Operating voltage(VDC)I²C-bus(kHz)Operating
temp.(Cel)		# of AddressesMax Sink Current
per package(mA)		Reset input pin
PCA9537DPSOT552-1
(TSSOP10)		4yes10no internal pull up resistor252.3~5.5400-40~85150Yes

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
PCA9537DPPCA9537DP,118PCA9537DPweek 13, 200511
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Documentation for this product

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9537DP9352 774 95118PCA9537DP,118NADIGI-KEY CORPORATION6,2122/7/2012Buy online 
   NAAVNET ELECTRONICS MARKETING2,5272/7/2012Buy online 
   NAFUTURE ELECTRONICS2,3002/6/2012Buy online 
   JAPANCHIP ONE STOPyes02/08/2012Buy online 

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