Reset supervisor for a 5 V rail — 170 ms hold-off, open-drain output
The TPS3851H50EDRBT is a single-channel voltage supervisor from Texas Instruments, monitoring a 5 V supply rail and asserting a reset signal when the voltage drops below the threshold.
The 5 V threshold is fixed, so the part is a direct fit for any 5 V rail that needs supervision. The 170 ms reset timeout is longer than the 130 ms minimum on the TLV803EA29VDBZR, which can be an advantage when the 5 V rail has a slow ramp or a large output capacitor. The open-drain output lets the reset signal be pulled up to a different voltage (e.g., 3.3 V) if the processor I/O operates at a lower level, without needing a level shifter.
The base product number TPS3851 covers the family, and the part is ROHS3 compliant.