Automotive 3.3V rail supervisor in 6-WSON
The TPS3870J4330DSERQ1 is a single-channel voltage supervisor from Texas Instruments, part of the Automotive AEC-Q100 series, designed to monitor a 3.3V supply rail and assert an active-low reset signal when the voltage drops below threshold. The open-drain output allows wired-OR connection with other fault signals. Typical application is reset generation for microcontrollers, DSPs, or ASICs in automotive ECUs, ADAS modules, and body-control units.
Threshold and timeout for supply sequencing
With a voltage threshold of 3.3V, this supervisor monitors a nominal 3.3V rail. That 140ms window is longer than the TLV803EA29VDBZR's 130ms minimum, which can matter if the upstream regulator has a slow soft-start ramp.
The part is ROHS3 compliant. Date-code spread and packaging condition are confirmed at quote time.