Philips Semiconductors

Product data

PCA9535

2

2003 Jun 27

FEATURES

MM per JESD22-A115, and 1000 V CDM per JESD22-C101

exceeds 100 mA

HVQFN24

DESCRIPTION

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

General Purpose parallel Input/Output (GPIO) expansion for

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

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.

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

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

DRAWING NUMBER

24-Pin Plastic SO

-40 to +85

°C

PCA9535D

PCA9535D

SOT137-1

24-Pin Plastic TSSOP

-40 to +85

°C

PCA9535PW

PCA9535PW

SOT355-1

24-Pin Plastic HVQFN

-40 to +85

°C

PCA9535BS

9535

SOT616-1

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