Datasheet > X45620

X45620

更新时间： 2022-11-25 17:28:42

品牌	Logo	应用领域
英特矽尔 - INTERSIL		电池开关监控可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
20页	369K
描述
Dual Voltage Monitor with Integrated System Battery Switch and EEPROM

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X45620 数据手册

X45620

Data Sheet

July 29, 2005

FN8250.0

• 2.7V to 5.5V power supply operation

• Available package — 20-lead TSSOP

• Dual supervisor

Dual Voltage Monitor with Integrated

System Battery Switch and EEPROM

• Battery switch and output

FEATURES

• Dual voltage monitoring

• Active low reset outputs

DESCRIPTION

The Intersil X45620 combines power-on reset control,

battery switch circuit, watchdog timer, supply voltage

supervision, secondary voltage supervision, block lock

protect and serial EEPROM in one package. This

combination lowers system cost, reduces board space

requirements, and increases reliability.

• Two standard reset threshold voltages

—Factory programmable threshold

• Lowline Output — zero delayed POR

• Reset signal valid to V = 1V

• System battery switch-over circuitry

• Selectable watchdog timer

—(0.15s, 0.4s, 0.8s, off)

• 256Kbits of EEPROM

• Built-in inadvertent write protection

—Power-up/power-down protection circuitry

—Protect 0, 1/4, 1/2 or all of EEPROM array with

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

stabilize before the processor can execute code.

™

programmable Block Lock protection

A system battery switch circuit compares V (V1MON)

—In circuit programmable ROM mode

• Minimize EEPROM programming time

—64 byte page write mode

with V

input and connects V

to whichever is

BATT

OUT

higher. This provides voltage to external SRAM or other

circuits in the event of main power failure. The X45620

—Self-timed write cycle

can drive 50mA from V and 250µA from V

. The

BATT

—5ms write cycle time (typical)

• 400kHz 2-wire Interface

device switches to V

when V

drops below the

BATT

low V voltage threshold and V

BATT > CC

BLOCK DIAGRAM

OUT

V2FAIL

WDO

V2MON

TRIP2

V2 Monitor

Logic

Watchdog Transition

Detector

Watchdog

Timer Reset

Protect Logic

Data

Status

SDA

SCL

Reset &

Watchdog

Timebase

Command

Decode, Test

& Control

Logic

EEPROM

Array

BATT-ON

512 X 512

(32K X 8 Bit)

Device

Select

Logic

RESET/MR

Power-on,

Low Voltage

Reset

OUT

LOWLINE

(V1MON)

TRIP1

Generation

Monitor

Logic

System

Battery

Switch

OUT

BATT

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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