PCA9536 Datasheet, PDF (1/22 Pages) NXP Semiconductors – 4-bit I2C and SMBus I/O port

PCA9536
4-bit I²C-bus and SMBus I/O port
Rev. 05 — 25 January 2010
Product data sheet
1. General description
The PCA9536 is an 8-pin CMOS device that provides 4 bits of General Purpose parallel
Input/Output (GPIO) expansion 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 PCA9536 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 read
register can be inverted with the Polarity Inversion register. All registers can be read by
the system master.
The power-on reset sets the registers to their default values and initializes the device state
machine.
The I²C-bus address is fixed and allows only one device on the same I²C-bus/SMBus.
2. Features
„ 4-bit I²C-bus GPIO
„ Operating power supply voltage range of 2.3 V to 5.5 V
„ 5 V tolerant I/Os
„ Polarity Inversion register
„ Low standby current
„ Noise filter on SCL/SDA inputs
„ No glitch on power-up
„ Internal power-on reset
„ 4 I/O pins which default to 4 inputs with 100 kΩ internal pull-up resistor
„ 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
„ Packages offered: SO8, TSSOP8 (MSOP8), HVSON8