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.
   
Features and benefits
■ 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