STC813L datasheet, PDF - EEWORLD Datasheet

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STC813L: DescriptionUP Supervisor Circuits; File Size57KB，7 Pages; ManufacturerETC

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STC813L Overview

UP Supervisor Circuits

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Data Sheet

STC705-706/706P-707-708-708T/S/R-813L

P Supervisor Circuits

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Features

• Precision supply-voltage monitor

- 4.63V (STC706L/705, 813L, 708L/707)

- 4.38V (STC706M/706, 813M, 708M/708)

- 3.08V (STC706T, 813T, 708T)

- 2.93V (STC706S, 813S, 708S)

- 2.63V (STC706R, 813R/706P, 708R)

- 2.32V (STC706Z, 813Z, 708Z)

- 2.20V (STC706Y, 813Y, 708Y)

• 200ms reset pulse width

• Debounced TTL/CMOS-compatible manual-

reset input

• Independent watchdog timer 1.6sec time-out (not

available for STC707/708/708T/708S/R/Z/Y)

• Reset output signal:

- Active-low only (STC705/706/706T/S/R/Z/Y)

- Active-high only (STC813L/M/T/S/R/706P)

- Active-high and active-low (707/708/708T/S/R)

• Voltage monitor for power-fail or low battery warning

• Guaranteed RESET/RESET valid at V

= 1.2V

Introduction

The STC706X/813X/708X family microprocessor

(µP) supervisory circuits are targeted to improve

reliability and accuracy of power-supply circuitry in

µP systems. These devices reduce the complexity and

number of components required to monitor power-

supply and battery functions.

The main functions are:

1. Asserting reset output during power-µp, power-

down and brownout conditions for µP system;

2. Detecting power failure or low-battery conditions

with a 1.25V threshold detector;

3. Watchdog functions (not for STC708x).

Applications

• Power-supply circuitry in µP systems

STC

Ver1.0

Data Sheet

STC705-706/706P-707-708-708T/S/R-813L

P Supervisor Circuits

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Contents

Features ....................................................................................................................................................... 1

Block Diagram ............................................................................................................................................ 1

Introduction ................................................................................................................................................. 1

Pin Information ........................................................................................................................................... 4

Pin Configuration .............................................................................................................................. 4

Pin Description .................................................................................................................................. 4

Functional Description ................................................................................................................................ 5

Reset Output ...................................................................................................................................... 5

Watchdog Timer ................................................................................................................................ 5

Manual Reset ..................................................................................................................................... 5

Power-Fail Comparator ..................................................................................................................... 5

Function Reference Table .................................................................................................................. 6

Detailed Specifications ................................................................................................................................ 7

Absolute Maximum Ratings .............................................................................................................. 7

Recommended Operation Condition ................................................................................................. 7

DC Electrical Characteristics ............................................................................................................. 8

AC Electrical Characteristics ............................................................................................................. 9

Ordering Information ................................................................................................................................ 10

Mechanical Information ............................................................................................................................ 11

Notes ......................................................................................................................................................... 12

STC

Ver1.0

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