April 2008
rev 1.6
ASM705/706/707/708
ASM813L
Low Power µP Supervisor Circuits
General Description
The ASM705 / 706 / 707 / 708 and ASM813L are cost
effective CMOS supervisor circuits that monitors power-
supply and battery voltage level, and µP/µC operation.
Features
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Precision power supply monitor
• 4.65V threshold (ASM705/707/813L)
• 4.40V threshold (ASM706/708)
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Debounced manual reset input
Voltage monitor
• 1.25V threshold
• Battery monitor / Auxiliary supply monitor
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Watchdog timer (ASM705/706/813L)
200ms reset pulse width
Active HIGH reset output (ASM707/708/813L)
MicroSO package
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The family offers several functional options. Each device
generates a reset signal during power-up, power-down and
during brownout conditions. A reset is generated when
the supply drops below 4.65V (ASM705/707/813L) or
4.40V (ASM706/708). For 3V power supply applications,
refer to the ASM705P/R/S/T data sheet. In addition, the
ASM705/706/813L feature a 1.6 second watchdog timer.
The ASM707/708 have both active-HIGH and active-LOW
reset outputs but no watchdog function. The ASM813L
has the same pin-out and functions as the ASM705 but has
an active-HIGH reset output. A versatile power-fail circuit
has a 1.25V threshold, useful in low battery detection and
for monitoring non-5V supplies. All devices have a manual
reset (MR) input. The watchdog timer output will trigger
a reset if connected to MR.
All devices are available in 8-pin DIP, SO and MicroSO
packages.
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Application
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Computers and embedded controllers
Portable/Battery-operated systems
Intelligent instruments
Wireless communication systems
PDAs and hend-held equipment
Automative Systems
Safety Systems
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Typical Operating Circuit
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008
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Tel: 408-879-9077
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Fax: 408-879-9018
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.
PULSECORE [ PulseCore Semiconductor ]
