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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.