8-channel sequencer for multi-rail power-up control
The UCD9081RHBR is an 8-channel voltage sequencer from Texas Instruments, designed to manage the power-up and power-down order of multiple supply rails in a system. It monitors eight independent voltage thresholds, each adjustable or selectable, allowing the designer to set the sequence and timing for each rail without external components. The active-low reset output asserts when any monitored voltage falls below its threshold, with a minimum reset timeout of 2 µs — fast enough to catch glitches on sensitive digital loads.