PCA9558 datasheet(2/18 Pages) PHILIPS

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Philips Semiconductors

Product data

PCA9558

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit

latched 6-bit I2C EEPROM and 2 k bit EEPROM

2002 May 24

853-2235 28310

FEATURES

• 5-bit 2-to-1 multiplexer, 1-bit latch

• 6-bit MUX_OUTx and NON_MUXED_OUT EEPROM

programmable and readable via I2C-bus

• 5 V tolerant open drain MUX_OUTx and NON_MUXED_OUT

outputs

• Active-LOW override input forces all MUX_OUTx outputs to logic 0

• I2C readable MUX_INx inputs

• 5 V tolerant open drain I/Ox pins, power-up default as outputs

• 1 address pin, allowing up to 2 devices on the I2C-bus

• Active-LOW reset input with internal pull-up for the 8 I/O pins

• 2048-bit EEPROM programmable and readable via the I2C or I/Os

• Operating power supply voltage range of 3.0 V – 3.6 V

• SMBus compliance with fixed 3.3 V levels

• 2.5 V – 5 V tolerant inputs

• 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

DESCRIPTION

The PCA9558 is a highly integrated, multi-function device that is

composed of a 5-bit multiplexed/1-bit latched 6-bit I2C/SMBus

EEPROM, an 8-bit I/O expander and a 2K serial EEPROM with write

protect. The PCA9558 integrates these commonly used components

into a single chip to reduce component count and board space

requirements and is useful in computer, server and

telecom/networking applications.

Multiplexed/latched EEPROM — used to select digital information

between a set of 5-bits of default hardware inputs and an alternative

set of inputs provided by the I2C/SMBus interface and stored in the

EEPROM. Examples of this type of selection include processor

voltage configuration or processor vendor identification (VID). The

multiplexed/latched EEPROM can also be used to replace DIP

switches or jumpers, since the settings can be easily changed via

I2C/SMBus without having to power down the equipment to open the

cabinet. The non-volatile memory retains the most current setting

selected before the power is turned off.

8-bit I/O expander — used to control, monitor or collect remote

information or power LEDs. Monitored or collected information can

be read through the I2C/SMBus or can be stored in the internal

EEPROM.

2K serial EEPROM — used to store information such as card

identification or revision/maintenance history on every

motherboard/linecard and can be read or written via I2C/SMBus

when required.

The PCA9558 has 1 address pin allowing up to 2 devices to be

placed on the same I2C bus or SMBus.

PIN CONFIGURATION

SCL

SDA

I/O_OUT_LOW

MUX_INA

MUX_INB

MUX_INC

MUX_IND

MUX_INE

GND

I/O0

VDD

MUX_OUT_LOW

NON_MUXED_OUT

MUX_OUTA

MUX_OUTB

MUX_OUTC

MUX_OUTE

MUX_OUTD

MUX_SELECT

I/O7

I/O6

I/O1

16 I/O5

I/O2

15 I/O4

I/O3

SW00614

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

28-Pin Plastic TSSOP

0 to +70

°C

PCA9558PW

SOT361-1

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

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