UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
This design monitors a 3.3-V rail and flags an undervoltage fault at the RESET output when supply rail falls approximately 12% below the nominal rail voltage. The TLV803E device has an open-drain output topology so a pull-up resistor is required and chosen such that the RESET current (IRESET) spec of ±5 mA is not violated. Pull-up resistors between 10 kΩ and 1 MΩ are recommended. If you are using the TLV809E device variant, no pull-up resistor is required because TLV809E has push-pull output topology.