© Semiconductor Components Industries, LLC, 2012

August, 2012 − Rev. 2

1

Publication Order Number:

PCA9535E/D

PCA9535E, PCA9535EC

16-bit Low-Power I/O

Interrupt

The PCA9535E and PCA9535EC devices provide 16 bits of

General Purpose parallel Input / Output (GPIO) expansion through the

The PCA9535E and PCA9535EC consist of two 8−bit

Configuration (Input or Output selection); Input, Output and Polarity

Inversion (active−HIGH or active−LOW operation) registers. At

power on, all I/Os default to inputs. Each I/O may be configured as

either input or output by writing to its corresponding I/O configuration

bit. The data for each Input or Output is kept in its corresponding Input

or Output register. The Polarity Inversion register may be used to

invert the polarity if the read register. All registers can be read by the

system master.

The PCA9535E, identical to the PCA9655E but with the internal

I/O pull−up resistors removed, has greatly reduced power

consumption when the I/Os are held LOW.

The PCA9535EC is identical to the PCA9535E but with

high−impedance open−drain outputs at all the I/O pins.

The PCA9535E and PCA9535EC provide an open−drain interrupt

output which is activated when any input state differs from its

corresponding input port register state. The interrupt output 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 (AD0, AD1, AD2) are used to configure the

the PCA9535E and PCA9535EC are the same as the PCA9655E. This

allows up to 64 of these devices in any combination to share the same

Features

Address Pins

Standard Mode: 100 kHz

Fast Mode: 400 kHz

Fast Mode +: 1 MHz

Machine Model

SOIC−24

DW SUFFIX

CASE 751E

See detailed ordering and shipping information in the package

dimensions section on page 17 of this data sheet.

ORDERING INFORMATION

MARKING

DIAGRAMS

http://onsemi.com

TSSOP−24

DT SUFFIX

CASE 948H

1

WQFN24

MT SUFFIX

CASE 485BG

PCA

9535E(C)

ALYWG

G

PCA95

35E(C)

AWLYYWWG

PCA9535E(C)

AWLYYWWG

XXXX

= Specific Device Code

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

G or G = Pb−Free Package

(Note: Microdot may be in either location)