PCA8550PW,118

专用接口, I2C, I2C-Bus系统, 3 V, 3.6 V, TSSOP, 16 引脚

Overview

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. 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.

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## Features

* 4-bit 2-to-1 multiplexer, 1-bit latch DIP switch

* 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

* 2.5 V multiplexed outputs

* 3.3 V non-multiplexed output latched

* 5 V tolerant inputs

* Useful for "jumperless" configuration of PC motherboards

* Designed for use in Pentium Pro/Pentium II systems

## Features