Information as of 2000-01-10
 Latest information online 

PCA8550; 4-bit multiplexed/1-bit latched 5-bit I²C-bus EEPROM

• Description • Features • Datasheet • Products, packages, availability and ordering • Find similar products •

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Description

The primary function of the 4-bit 2-to-1 I²PC multiplexer is to select either a 4-bit input or data from a non-volatile register and drive this value onto the output pins. One additional non-multiplexed register output is also provided. The non-multiplexed output is latched to prevent output value changes during I²PC writes to the non-volatile register. A write protect input is provided to enable/disable the ability to write to the non-volatile register. An 'override' input feature forces all outputs to logic 0.

Features

• 4-bit 2-to-1 multiplexe, 1-bit latch
• 5-bit internal non-volatile register
• Override input forces all outputs to logic 0
• Internal non-volatile register write/readable via I²PC-bus
• Write-protect pin enables/disables I²C writes to register
• 2.5V multiplexed outputs
• 3.3V non-multiplexed output (latched)
• 5V tolerant inputs
• Useful for ’jumperless’ configuration of PC motherboards
• Designed for use in Pentium Pro/Pentium II^TM systems Pentium II is a registered trademark of Intel Corporation

Datasheet

Type nr.	Title	Publication release date	Datasheet status	Page count	File size (kB)	Datasheet
PCA8550	4-bit multiplexed/1-bit latched 5-bit I2C-bus EEPROM	29-Sep-98	Product Specification	12	87	Open

Products, packages, availability and ordering

Partnumber	Order code (12nc)	marking/packing	package	device status	buy online
PCA8550D	9352 614 57118	Standard marking * reel pack, SMD, 13"	DJD	RFS
PCA8550DB	9352 614 58112	Standard marking * tube	DJF	RFS	-
	9352 614 58118	Standard marking * reel pack, SMD, 13"	DJF	RFS	-
PCA8550PW	9352 598 70112	Standard marking * tube	DJW	RFS
	9352 598 70118	Standard marking * reel pack, SMD, 13"	DJW	RFS

Please note, devices listed in the "Products, packages, availability and ordering" table marked with "WIT" are discontinued. Devices marked with "DOD" will be in the near future.
Contact your nearest sales or distributor office for the latest information on product status and availability.

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