CAT1161LI42G datasheet, PDF - EEWORLD Datasheet

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CAT1161LI42G: DescriptionSupervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller; File Size145KB，13 Pages; ManufacturerON Semiconductor; Websitehttp://www.onsemi.cn

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CAT1161LI42G Overview

Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller

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CAT1161, CAT1162

Supervisory Circuits with

C Serial CMOS EEPROM,

Precision Reset Controller

and Watchdog Timer (16K)

Description

http://onsemi.com

The CAT1161/2 is a complete memory and supervisory solution for

microcontroller−based systems. A serial EEPROM memory (16K)

with hardware memory write protection, a system power supervisor

with brown out protection and a watchdog timer are integrated

together in low power CMOS technology. Memory interface is via an

C bus.

The 1.6−second watchdog circuit returns a system to a known good

state if a software or hardware glitch halts or “hangs” the system. The

CAT1161 watchdog monitors the SDA line, making an additional PC

board trace unnecessary. The lower cost CAT1162 does not have a

watchdog timer.

The power supply monitor and reset circuit protects memory and

system controllers during power up/down and against brownout

conditions. Five reset threshold voltages support 5 V, 3.3 V and 3 V

systems. If power supply voltages are out of tolerance reset signals

become active, preventing the system microcontroller, ASIC or

peripherals from operating. Reset signals become inactive typically

200 ms after the supply voltage exceeds the reset threshold level. With

both active high and low reset signals, interface to microcontrollers

and other ICs is simple. In addition, a reset pin can be used as a

debounced input for pushbutton manual reset capability.

The CAT1161/2 memory features a 16−byte page. In addition,

hardware data protection is provided by a write protect pin WP and by

a V

sense circuit that prevents writes to memory whenever V

falls

below the reset threshold or until V

reaches the reset threshold

during power up.

Available packages include an 8−pin DIP and a surface mount,

8−pin SO package.

Features

PDIP−8

CASE 646AA

SOIC−8

CASE 751BD

PIN CONFIGURATION

RESET

GND

CAT1161

CAT1162

RESET

SCL

SDA

PIN FUNCTIONS

Pin Name

RESET

GND

SDA

SCL

RESET

Function

Do Not Connect

Active Low Reset I/O

Write Protect

Ground

Serial Data/Address

Clock Input

Active High Reset I/O

Power Supply

•

Watchdog Monitors SDA Signal (CAT1161)

400 kHz I

C Bus Compatible

2.7 V to 6 V Operation

Low Power CMOS Technology

16−Byte Page Write Buffer

Built−in Inadvertent Write Protection

♦

Lock Out

♦

Write Protection Pin, WP

•

Active High or Low Reset

♦

Precision Power Supply Voltage Monitor

♦

5 V, 3.3 V and 3 V Systems

♦

Five Threshold Voltage Options

ORDERING INFORMATION

For Ordering Information details, see page 11.

•

1,000,000 Program/Erase Cycles

Manual Reset

100 Year Data Retention

8−Pin DIP or 8−Pin SOIC

Commercial and Industrial Temperature Ranges

These Devices are Pb−Free, Halogen Free/BFR Free

and are RoHS Compliant

Semiconductor Components Industries, LLC, 2012

July, 2012

−

Rev. 12

Publication Order Number:

CAT1161/D

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