X40626S14-4.5A datasheet, PDF - EEWORLD Datasheet

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X40626S14-4.5A: DescriptionRTC Module With CPU Supervisor; Categoryaccessories; File Size840KB，22 Pages; ManufacturerIntersil ( Renesas ); Websitehttp://www.intersil.com/cda/home/

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X40626S14-4.5A Overview

RTC Module With CPU Supervisor

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DATASHEET

X40626

64K, 8K x 8 Bit Dual Voltage CPU Supervisor with 64K Serial EEPROM

FEATURES

• Dual voltage monitoring

—V

2Mon

operates independent of V

• Watchdog timer with selectable timeout intervals

• Low V

detection and reset assertion

—Four standard reset threshold voltages

—User programmable V

TRIP

threshold

—Reset signal valid to V

=1V

• Low power CMOS

—20µA max standby current, watchdog on

—1µA standby current, watchdog OFF

• 64Kbits of EEPROM

—64 byte page size

• Built-in inadvertent write protection

—Power-up/power-down protection circuitry

—Protect 0, 1/4, 1/2, all or 64, 128, 256 or 512

bytes of EEPROM array with programmable

Block Lock

™

protection

• 400kHz 2-wire interface

—Slave addressing supports up to 4 devices on

the same bus

FN8119

Rev 0.00

March 28, 2005

• 2.7V to 5.5V power supply operation

• Available Packages

—14-lead SOIC

—14-lead TSSOP

DESCRIPTION

The X40626 combines four popular functions, Power-on

Reset Control, Watchdog Timer, Dual Supply Voltage

Supervision, and Serial EEPROM Memory in one pack-

age. This combination lowers system cost, reduces

board space requirements, and increases reliability.

Applying power to the device activates the power-on

reset circuit which holds RESET active for a period of

time. This allows the power supply and oscillator to stabi-

lize before the processor can execute code.

The Watchdog Timer provides an independent protec-

tion mechanism for microcontrollers. When the micro-

controller fails to restart a timer within a selectable time-

out interval, the device activates the RESET signal. The

user selects the interval from three preset values. Once

selected, the interval does not change, even after cycling

the power.

BLOCK DIAGRAM

V2FAIL

V2MON

V2 Monitor

Logic

Watchdog Transition

Detector

SDA

Data

Command

Decode &

Control

Logic

Threshold

Reset logic

Block Lock Control

Protect Logic

TRIP2

Watchdog

Timer Reset

RESET

Status

Reset &

Watchdog

Timebase

SCL

64KB

EEPROM

Array

TRIP

Power-on and

Low Voltage

Reset

Generation

FN8119 Rev 0.00

March 28, 2005

Page 1 of 22

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