ASM705 Datasheet, PDF (1/13 Pages) Alliance Semiconductor Corporation – Low Power UP Supervisor Circuits

ASM705, ASM706, ASM707,
ASM708, ASM813L
Low Power mP Supervisor
Circuits
Description
The ASM705 / 706 / 707 / 708 and ASM813L are cost effective
CMOS supervisor circuits that monitor power−supply and battery
voltage level, and mP/mC operation.
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 4.65 V
(ASM705/707/813L) or 4.40 V (ASM706/708). For 3 V 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 1.25 V threshold, useful in low
battery detection and for monitoring non−5 V 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.
Features
• Precision Power Supply Monitor
4.65 V Threshold (ASM705/707/813L)
4.40 V Threshold (ASM706/708)
• Debounced Manual Reset Input
• Voltage Monitor
1.25 V Threshold
Battery Monitor / Auxiliary Supply Monitor
• Watchdog Timer (ASM705/706/813L)
• 200 ms Reset Pulse Width
• Active HIGH Reset Output (ASM707/708/813L)
• MicroSO Package
Applications
• Computers and Embedded Controllers
• Portable/Battery−operated Systems
• Intelligent Instruments
• Wireless Communication Systems
• PDAs and Hand−held Equipment
• Automotive Systems
• Safety Systems
http://onsemi.com
PDIP−8
P SUFFIX
CASE 646AA
MICRO−8
U SUFFIX
CASE 846AA
SOIC−8
S SUFFIX
CASE 751BD
PIN CONFIGURATIONS
1
MR
RESET
V_CC
GND
ASM707
ASM708
RESET
NC
PFI
PFO
1
MR
V_CC
GND
PFI
ASM705
ASM706
(ASM813L)
WDO
RESET (RESET)
WDI
PFO
DIP/SO
(Top Views)
1
RESET
RESET
ASM707
MR
ASM708
V_CC
NC
PFO
PFI
GND
RESET (RESET)
WDO
MR
V_CC
1
ASM705
ASM706
(ASM813L)
MicroSO
(Top Views)
WDI
PFO
PFI
GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
1
August, 2011 − Rev. 3
Publication Order Number:
ASM705/D