ASM705 Datasheet, PDF (1/15 Pages) Alliance Semiconductor Corporation – Low Power UP Supervisor Circuits

April 2008
rev 1.6
ASM705/706/707/708
ASM813L
Low Power µP Supervisor Circuits
General Description
Features
The ASM705 / 706 / 707 / 708 and ASM813L are cost
• Precision power supply monitor
effective CMOS supervisor circuits that monitors power-
• 4.65V threshold (ASM705/707/813L)
supply and battery voltage level, and µP/µC operation.
• 4.40V threshold (ASM706/708)
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
• Debounced manual reset input
• 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
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.
Application
• Computers and embedded controllers
• Portable/Battery-operated systems
• Intelligent instruments
• Wireless communication systems
• PDAs and hend-held equipment
• Automative Systems
All devices are available in 8-pin DIP, SO and MicroSO
• Safety Systems
packages.
Typical Operating Circuit
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: [phone] • Fax: [phone]
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.