Why a 1.08V threshold matters for today's core rails
The TPS3124J12DBVT is a Texas Instruments Simple Reset/Power-On Reset supervisor that monitors a single voltage rail with a 1.08V threshold. That threshold targets low-voltage core supplies—1.0V to 1.2V—common in modern processors, FPGAs, and SoCs. If the rail dips below 1.08V, the reset output asserts and holds for a minimum 100ms timeout, giving the supply time to stabilize before the system restarts. The output is push-pull, totem-pole, configurable as either Active High or Active Low. This flexibility means it can directly drive a reset input without an external pull-up resistor, saving a component on the BOM.
The device is ROHS3 compliant, simplifying compliance with current environmental regulations.
Active production status and sourcing posture
Production continues, which means no urgency to stockpile or qualify a second source. The base product number is TPS3124. Multiple threshold and package variants exist under that family, but this specific J12 suffix locks the 1.08V threshold and the SOT-23-5 package.