AEC-Q100 qualified supervisor for three-rail automotive systems
Texas Instruments TPS37043A8OFDDFRQ1 is a multi-voltage supervisor in the Automotive, AEC-Q100 series, designed to monitor three supply rails in one package. The three voltage thresholds — 1V, 1.8V, 3.3V — cover the core, I/O, and auxiliary rails common in automotive microcontrollers and SoCs without external resistor dividers. The active-low, open-drain reset output allows wired-OR connection with other supervisors or a shared pull-up, simplifying the system reset architecture.
Temperature grade and package constraints for board layout
The TSOT-23-8 package routes the three monitored inputs and the open-drain output. The 10 ms typical reset timeout is a fixed delay that masks short supply glitches; if a shorter or longer timeout is needed, an external RC or a supervisor with adjustable timing must be used.
Comparing the TPS37043 to a simple reset IC
The TPS37043 monitors three voltages with a single 10 ms timeout; a simple reset IC like the TLV803EA29VDBZR monitors one voltage with a 130 ms minimum timeout. Where the TLV803ED29DBZR targets single-rail power-on reset, the TPS37043 handles multi-rail sequencing supervision in a single TSOT-23-8 footprint.