1.4V rail monitor with fast reset assertion
The TPS3803G15DCKR is a single-channel voltage supervisor from TI's Simple Reset family, designed to hold a processor or logic device in reset until the monitored supply rises above 1.4V. Propagation delay is 5 µs typical, which means the reset pin responds quickly to a brownout or power-down edge, reducing the chance of the downstream MCU/FPGA executing garbage code on a failing rail.
SC-70-5 package and operating range
Mounting is surface-mount only; the small package pitch suits 2-layer boards with careful fan-out, but a 4-layer stack-up with a dedicated ground plane eases routing for the open-drain pull-up trace.
No last-time-buy notice or end-of-life window is in effect, so standard lead times and volume pricing apply through authorized distribution. The base product number TPS3803 covers multiple threshold variants, but this 1.4V version is the specific BOM fit for low-voltage core rails.