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9535

16-bit I2C and SMBus/ low power I/O port with interrupt

Philips Electronics 

Philips Semiconductors

16-bit I2C and SMBus, low power I/O port with interrupt

Product data

PCA9535

FEATURES

• Operating power supply voltage range of 2.3 V-5.5 V

• 5 V tolerant I/Os

• Polarity inversion register

• Active LOW interrupt output

• Low stand-by current

• Noise filter on SCL/SDA inputs

• No glitch on power-up

• Internal power-on reset

• 16 I/O pins which default to 16 inputs

• 0 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 JESDEC Standard JESD78 which

exceeds 100 mA

• Offered in three different packages: SO24, TSSOP24, and

HVQFN24

I2C/SMBus applications and was developed to enhance the Philips

family of I2C I/O expanders. The improvements include higher drive

capability, 5 V I/O tolerance, lower supply current, individual I/O

configuration, and smaller packaging. I/O expanders provide a

simple solution when additional I/O is needed for ACPI power

switches, sensors, pushbuttons, LEDs, fans, etc.

The PCA9535 consist of two 8-bit Configuration (Input or Output

selection); Input, Output and Polarity inversion (Active HIGH or

Active LOW operation) registers. 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 or Output register. The polarity of the read register can be

inverted with the Polarity Inversion Register. All registers can be

read by the system master. Although pin-to-pin and I2C address

compatible with the PCF8575, software changes are required due to

the enhancements and are discussed in Application Note AN469.

The PCA9535 is identical to the PCA9555 except for the removal of

the internal I/O pull-up resistor which greatly reduces power

consumption when the I/Os are held LOW.

The PCA9535 open-drain interrupt output 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.

Three hardware pins (A0, A1, A2) vary the fixed I2C address and

allow up to eight devices to share the same I2C/SMBus. The fixed

I2C address of the PCA9535 is the same as the PCA9554 allowing

up to eight of these devices in any combination to share the same

I2C/SMBus.

DESCRIPTION

The PCA9535 is a 24-pin CMOS device that provide 16 bits of

General Purpose parallel Input/Output (GPIO) expansion for

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

24-Pin Plastic SO

-40 to +85 °C

PCA9535D

PCA9535D

24-Pin Plastic TSSOP

-40 to +85 °C

PCA9535PW

PCA9535PW

24-Pin Plastic HVQFN

-40 to +85 °C

PCA9535BS

9535

Standard packing quantities and other packing data are available at www.philipslogic.com/packaging.

I2C is a trademark of Philips Semiconductors Corporation.

SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I2C patent.

DRAWING NUMBER

SOT137-1

SOT355-1

SOT616-1

2003 Jun 27

2

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