ASM802M

更新时间： 2024-11-30 06:38:15

品牌	Logo	应用领域
PULSECORE		电池微处理器监控
页数	文件大小	规格书
15页	344K
描述
μP Power Supply Supervisor With Battery Backup Switch

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中文翻译

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数据手册

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ASM802M 数据手册

ASM690A/692A

ASM802L/802M

ASM805L

April 2008

rev 1.7

µP Power Supply Supervisor With Battery Backup Switch

General Description

• Short circuit protection and thermal limiting

The ASM690A / ASM692A / ASM802L / ASM802M /

ASM805L offers complete single chip solutions for power

supply monitoring and control battery functions in

microprocessor systems. Each device implements four

functions: Reset control, watchdog monitoring, battery-

backup switching and powerfailure monitoring. In addition

to microprocessor reset under power-up and power-down

conditions, these devices provide battery-backup

switching to maintain control in power loss and brown-out

situations. Additional monitoring capabilities can provide

an early warning of unregulated power supply loss before

the voltage regulator drops out. The important features of

these four functions are:

• Small 8-pin SO and 8-pin PDIP packages

• No external components

• Specified over full temperature range

Applications

• Embedded control systems

• Portable/Battery operated systems

• Intelligent instruments

• Wireless instruments

• Wireless communication systems

• PDAs and hand-held equipments

• µP / µC power supply monitoring

• Safety system

• 1.6 second watchdog timer to keep microprocessor

responsive

Typical Operating Circuit

• 4.40V or 4.65V VCC threshold for microprocessor reset

at power-up and power-down

•

SPDT (Single-pole, Double-throw) PMOS switch

connects backup power to RAM if VCC fails

• 1.25V threshold detector for power loss or general

purpose voltage monitoring

These features are pin-compatible with the industry

standard power-supply supervisors. Short-circuit and

thermal protection have also been added. The ASM690A

/ ASM802L / ASM805L generate a reset pulse when the

supply voltage drops below 4.65V and the ASM692A /

ASM802M generate a reset below 4.40V. The ASM802L /

ASM802M have power-fail accuracy to ± 2%. The

ASM805L is the same as the ASM690A except that

RESET is provided instead of RESET.

Block Diagram

Features

• Two precision supply-voltage monitor options

4.65V (ASM690A / ASM802L / ASM805L)

4.40V (ASM692A / ASM802M )

• Battery-backup power switch on-chip

• Watchdog timer: 1.6 second timeout

• Power failure / low battery detection

PulseCore Semiconductor Corporation

1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018

www.pulsecoresemi.com

Notice: The information in this document is subject to change without notice.

12 3 4 5 6 7...15

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与ASM802M相关器件

型号	品牌	获取价格	描述	数据表
ASM802MCPA	ALSC	获取价格	UP Power Supply Supervisor With Battery Backup Switch
ASM802MCPA	PULSECORE	获取价格	μP Power Supply Supervisor With Battery Backu
ASM802MCPAF	PULSECORE	获取价格	μP Power Supply Supervisor With Battery Backu
ASM802MCPAF	ONSEMI	获取价格	2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8, ROHS COMPLIANT, PLASTIC, DIP-8
ASM802MCPAF-T	ALSC	获取价格	Power Supply Management Circuit, Fixed, 2 Channel, PDIP8, ROHS COMPLIANT, PLASTIC, DIP-8
ASM802MCPAF-T	ONSEMI	获取价格	IC POWER SUPPLY MANAGEMENT CKT, Power Management Circuit
ASM802MCPA-T	ALSC	获取价格	Power Supply Management Circuit, Fixed, 2 Channel, PDIP8, PLASTIC, DIP-8
ASM802MCPA-T	ONSEMI	获取价格	IC POWER SUPPLY MANAGEMENT CKT, Power Management Circuit
ASM802MCSA	PULSECORE	获取价格	μP Power Supply Supervisor With Battery Backu
ASM802MCSA	ALSC	获取价格	UP Power Supply Supervisor With Battery Backup Switch

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