MIC706R_11 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – μP Supervisory Circuit

MIC706P/R/S/T, MIC708R/S/T
Micrel, Inc.
MIC706P/R/S/T, MIC708R/S/T
µP Supervisory Circuit
General Description
The MIC705, MIC706, MIC707, and MIC708 are inexpensive
mircoprocessor supervisory circuit that monitors power sup-
plies in microprocessor based systems. The circuit functions
include a watchdog timer, microprocessor reset, backup
battery switchover, power failure warning and a debounced
manual reset input.
The MIC705 and MIC706 offer a watchdog timer function
while the MIC707 and MIC708 have an active high reset
output in addition to the active low reset output.
Supply voltage monitor levels of 4.65V and 4.4V are available.
The MIC705 and MIC707 have a nominal reset threshold level
of 4.65V while the MIC706 and MIC708 have a 4.4V nominal
threshold level. When the supply voltage drops below the
respective reset threshold level, /RESET is asserted.
Features
• 30µA Maximum Supply Current
• Debounced manual reset input is TTL/CMOS
Compatible
• Reset Pulse Width, 200ms
• Watchdog timer, 1.6s (MIC706)
• Precision supply voltage monitor
• Early power fail warning or low battery detect
Applications
• Laptop computers
• Intelligent systems
• Critical microprocessor power monitoring
• Printers
• Computers
• Controllers
Ordering Information
Part Number
Standard
Pb-Free
MIC70_ _N MIC70_ _NY
MIC70_ _M MIC70_ _MY
Temperature Range
–40ºC to +85ºC
–40ºC to +85ºC
Package
8-Pin PDIP
8-Pin SOIC
Typical Application
Manual
Reset
DC Voltage
(Unregulated)
+3.0 or +3.3V (Regulated)
VCC
MR RESET
MIC706
WDI
WDO
PFI PFO
VCC
RESET
µP
I/O Line
NMI
Interrupt
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
January 2006
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MIC706P/R/S/T, MIC708R/S/T