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PCA8550 Datasheet 4-bit Multiplexed/1-bit Latched 5-bit I2c Eeprom

Manufacturer: NXP Semiconductors

Overview: INTEGRATED CIRCUITS PCA8550 4-bit multiplexed/1-bit latched 5-bit I2C EEPROM Product specification 1998 Sep 29 Philips Semiconductors Philips Semiconductors Product specification 4-bit multiplexed/1-bit latched 5-bit.

General Description

The primary function of the 4-bit 2-to-1 I2C 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 I2C writes to the non-volatile register.

Key Features

  • 4-bit 2-to-1 multiplexer, 1-bit latch.
  • 5-bit internal non-volatile register.
  • Override input forces all outputs to logic 0.
  • Internal non-volatile register write/readable via I2C 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/Pe.

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