PCA9537 查看數據表（PDF） - Philips Electronics

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PCA9537

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

Philips Electronics 

Philips Semiconductors

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

with interrupt and reset

Product data sheet

PCA9537

FEATURES

• 4-bit I2C GPIO with interrupt and reset

• Operating power supply voltage range of 2.3 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

• 4 I/O pins which default to 4 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 JEDEC Standard JESD78 which

exceeds 100 mA

• Offered in TSSOP10 package

DESCRIPTION

The PCA9537 is a 10-pin CMOS device that provide 4 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 I@C 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 PCA9537 consists of a 4-bit Configuration register (Input or

Output selection); 4-bit Input register, 4-bit Output 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 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 PCA9537 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.

The I2C address is fixed and allows only one device on the same

I2C/SMBus.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

10-Pin Plastic TSSOP

–40 °C to +85 °C

PCA9537DP

9537

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

SOT552-1

2004 Nov 29

2

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