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參數(shù)資料
| 型號： | ASM692ACSA |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 549K |
| 代理商： | ASM692ACSA |
ASM690A/692A and ASM802L/802M and ASM805L
μP Power Supply Supervisor
With Battery Backup Switch
2010 SCILLC. All rights reserved.
Publication Order Number:
January 2010 – Rev. 2
ASM690/D
General Description
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:
1.6 second watchdog timer to keep microprocessor
responsive
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.
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
Short circuit protection and thermal limiting
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
Typical Operating Circuit
Block Diagram
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