PCA9501 datasheet(2/22 Pages) PHILIPS

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Philips Semiconductors

Product data

PCA9501

8-bit I2C and SMBus I/O port with interrupt,

2-kbit EEPROM and 6 address pins

2003 Sep 12

FEATURES

• 8 general purpose input/output expander/collector

• Replacement for PCF8574 with integrated 2-kbit EEPROM

• Internal 256 × 8 EEPROM

• Self timed write cycle (5 ms typ)

• 16 byte page write operation

• I2C and SMBus interface logic

• Internal power-on reset

• Noise filter on SCL/SDA inputs

• Active low interrupt output

• 6 address pins allowing up to 64 devices on the I2C/SMBus

• No glitch on power-up

• Supports hot insertion

• Power-up with all channels configured as inputs

• Low standby current

• Operating power supply voltage range of 2.5 V to 3.6 V

• 5 V tolerant inputs/outputs

• 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

• Packages offered: SO20, TSSOP20, HVQFN20

DESCRIPTION

The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit

EEPROM.

The I/O expandable eight quasi bidirectional data pins can be

independently assigned as inputs or outputs to monitor board level

status or activate indicator devices such as LEDs. The system

master writes to the I/O configuration bits in the same way as for the

PCF8574. The data for each Input or Output is kept in the

corresponding Input or Output register. The system master can read

all registers.

The EEPROM can be used to store error codes or board

manufacturing data for read-back by application software for

diagnostic purposes and are included in the I/O expander package.

The PCA9501 Active-LOW open-drain interrupt output is activated

when any input state differes from its corresponding input port

input state has changed and the device needs to be interrogated.

The PCA9501 has six address pins with internal pull-up resistors

allowing up to 64 devices to share the common two wire I2C

software protocol serial data bus. The fixed GPIO address starts

with “1” and the fixed EEPROM I2C address starts with “0”, so the

PCA9501 appears as two separate devices to the bus master.

The PCA9501 supports hot insertion to facilitate usage in removable

cards on backplane systems.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

TOPSIDE MARK

DRAWING NUMBER

20-pin plastic SO

-40 to +85

°C

PCA9501D

SOT163-1

20-Pin Plastic TSSOP

-40 to +85

°C

PCA9501PW

PCA9501

SOT360-1

20-Pin Plastic HVQFN

-40 to +85

°C

PCA9501BS

9501

SOT662-1

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

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

I2C is a trademark of Philips Semiconductors Corporation.

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