ASM705/706/707/708 and ASM813L
Low Power μP
Supervisor Circuits
General Description
Features
The ASM705 / 706 / 707 / 708 and ASM813L are cost
effective CMOS supervisor circuits that monitor powersupply and battery voltage level, and μP/μC operation.
Precision power supply monitor
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.
Debounced manual reset input
All devices are available in 8-pin DIP, SO and MicroSO
packages.
4.65V threshold (ASM705/707/813L)
4.40V threshold (ASM706/708)
Voltage monitor
1.25V threshold
Battery monitor / Auxiliary supply monitor
Watchdog timer (ASM705/706/813L)
200ms reset pulse width
Active HIGH reset output (ASM707/708/813L)
MicroSO package
Application
Computers and embedded controllers
Portable/Battery-operated systems
Intelligent instruments
Wireless communication systems
PDAs and hend-held equipment
Automative Systems
Safety Systems
Typical Operating Circuit
©2010 SCILLC. All rights reserved.
JANUARY 2010 – Rev. 2
Publication Order Number:
ASM705/D
