Power-On Reset Generator

Automatic Reset Generation After Voltage

Drop

Low Standby Current . . . 20 μA

RESET Output Defined When VCC

Exceeds 1 V

Precision Threshold Voltage

4.55 V ±120 mV

High Output Sink Capability . . . 20 mA

Comparator Hysteresis Prevents Erratic

Resets

description/ordering information

The TL7757 is a supply-voltage supervisor

designed for use in microcomputer and

microprocessor systems. The supervisor

monitors the supply voltage for undervoltage

conditions. During power up, when the supply

voltage, VCC, attains a value approaching 1 V, the

RESET output becomes active (low) to prevent

undefined operation. If the supply voltage drops

below threshold voltage level (VIT−), the RESET

output goes to the active (low) level until the

supply undervoltage fault condition is eliminated.