PCA9558

General 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 DIP switch, an 8-bit I/O expander and a 2-kbit 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 DIP switch ? 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.

2-kbit 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.

Features

• 5-bit 2-to-1 multiplexer, 1-bit latch DIP switch
• 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 to 3.6 V
• SMBus compliance with fixed 3.3 V levels
• 2.5 V to 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

Products/packages

Pricing/ordering/availability

Applications

Related applications
Digital media adapters
LCD display - discretes focus
PDA - discretes focus
Motherboard components
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Mid-range integrated DTV (TV810)
Intelligent washing machine
PCI analog/DVB-T stereo TV receiver
Nexperia UMA-enabled GSM/GPRS/EDGE VAS system solution (6100)
Cellular phone - MMS functionality
LCD TV - MMS functionality
Set-top box - MMS functionality

Block diagrams/pinning

Technical documents

Application Notes

AN10216_1; I2C manual (27-Mar-03)

AN10441_1; Level shifting techniques in I (20-Jun-07)

AN250_1; PCA8550 4-bit multiplexed/1-bit latched 5-bit I2C EEPROM (01-Oct-98)

AN469_2; I2C/SMBus general purpose I/O expanders (20-Jan-05)

Support Documents

design_con_2003_tecforum_i2c_bus_overview; DesignCon 2003 TecForum I 2 C Bus Overview (2003-01-27)

75013239; I 2 C Logic Selection Guide (2005-01-12)

75011212; I2C 2002-1A Evaluation Board Kit (01-Mar-03)

75012744; I2C Bus Solutions 2004 (2004-02-01)

UM10206_1; I2C Demonstration Board 2005-1 Quick Start Guide (13-Jun-06)

philips_i2c_handbook; I2C Handbook (2004-01-01)

39340011_21; I2C-bus specification (version 2.1) (2000-01-01)

UM10204_3; I2C-bus specification and user manual (26-Jun-07)

pca9558; IBIS model of PCA9558 5-bit multiplexed/1-bit latched 6-bit I2C TSSOP 28-pin Package (2001-01-18)

75016022; NXP 8/16-bit I2C/SMBus GPIO expanders PCA9554/54A/55 (2007-06-01)

75010652; PCA9558 (2001-12-01)

75008211; PCA9558 5-bit Multiplexed/1-bit Latched 6-bit I 2 C EEPROM and Octal SMBus Register Interface with 256 Byte I 2 C EEPROM (2002-04-22)

75015669; Your complete choice for I2C-bus peripherals (01-Dec-07)

75014395; Your connection to I 2 C,UART,CAN,and USB Connecting with Philips Wired Connectivity (2005-04-01)

Parametrics/similar products

Similar products

PCA9558 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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