Reference

Voltage

+

−

+

−

R

S

Q

+

−

RESET

GND

CT

SENSE

High:

On

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10

TL7700-SEP

SLVSF13 – MARCH 2019

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8 Detailed Description

8.1 Overview

The TL7700-SEP is a bipolar integrated circuit designed for use as a reset controller in microcomputer and

microprocessor systems. The SENSE voltage can be set to any value greater than 0.5 V using two external

resistors. The hysteresis value of the sense voltage also can be set by the same resistors. The device includes a

precision voltage reference, fast comparator, timing generator, and output driver, so it can generate a power-on

reset signal in a digital system.

The TL7700-SEP has an internal 1.5-V temperature-compensated voltage reference from which all function

blocks are supplied. Circuit function is very stable, with supply voltage in the 1.8-V to 40-V range. Minimum

supply current allows use with ac line operation and portable battery operation.

8.2 Functional Block Diagram