PCA9538D datasheet(2/18 Pages) PHILIPS

2 / 18 page

Philips Semiconductors

Product data sheet

PCA9538

8-bit I2C and SMBus low power I/O port

with interrupt and reset

2004 Oct 05

FEATURES

• 8-bit I2C 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 stand-by current

• Noise filter on SCL/SDA inputs

• No glitch on power-up

• Internal power-on reset

• 8 I/O pins which default to 8 inputs

• 0 kHz 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: SO16, TSSOP16, and

HVQFN16

DESCRIPTION

The PCA9538 is a 16-pin CMOS device that provide 8 bits of

General Purpose parallel Input/Output (GPIO) expansion with

interrupt and reset for I2C/SMBus applications and was developed

to enhance the Philips family of I2C I/O expanders. I/O expanders

provides a simple solution when additional I/O is needed for ACPI

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

The PCA9538 consists of an 8-bit Configuration register (Input or

Output selection); 8-bit Input register, 8-bit Output register and an

8-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 or Output 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 PCA9538 is identical to the PCA9554 except for the removal of

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

consumption when the I/Os are held LOW, replacement of A2 with

RESET and different address range.

The PCA9538 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. The RESET pin

causes the same reset/initialization to occur without depowering the

device.

Two hardware pins (A0 and A1) vary the fixed I2C address and allow

up to four devices to share the same I2C/SMBus.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

DRAWING NUMBER

16-Pin Plastic SO (wide)

–40

°C to +85 °C

PCA9538D

SOT162-1

16-Pin Plastic TSSOP

–40

°C to +85 °C

PCA9538PW

PCA9538

SOT403-1

16-Pin Plastic HVQFN

–40

°C to +85 °C

PCA9538BS

9538

SOT629-1

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

I2C-bus 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.

PCA9538D Datasheet(PDF) 2 Page - NXP Semiconductors

PCA9538D Datasheet(HTML) 2 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Datasheet Download

Link URL