The primary function of the 4-bit 2-to-1 I²C multiplexer is to select either a 4-bit input ordata from a non-volatile register and drive this value onto the output pins. One additionalnon-multiplexed register output is also provided. The non-multiplexed output is latched toprevent output value changes during I²C writes to the non-volatile register. A write protectinput is provided to enable/disable the ability to write to the non-volatile register. An"override" input feature forces all outputs to logic 0.
Feature
- 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
