SP703 Datasheet, PDF (1/16 Pages) Sipex Corporation – Low Power Microprocessor Supervisory with Battery Switch-Over

®
SP703/SP704
Low Power Microprocessor Supervisory
with Battery Switch-Over
s Precision Voltage Monitor:
SP703 at 4.65V
SP704 at 4.40V
s Reset Time Delay - 200ms
s Debounced TTL/CMOS -
Compatible Manual - Reset Input
s Minimum component count
s 60µA Maximum Operating Supply Current
s 0.6µA Maximum Battery Backup Current
s 0.1µA Maximum Battery Standby Current
s Power Switching
250mA Output in V_CC Mode (0.6Ω)
25mA Output in Battery Mode (5Ω)
s Voltage Monitor for Power Fail or
Low Battery Warning
s Available in 8 pin SO and DIP packages
s RESET asserted down to V_CC = 1V
s Pin Compatible Upgrades to
MAX703/MAX704
DESCRIPTION
The SP703/704 devices are microprocessor (µP) supervisory circuits that integrate a myriad
of components involved in discrete solutions to monitor power-supply and battery-control
functions in µP and digital systems. The series will significantly improve system reliability and
operational efficiency when compared to discrete solutions. The features of the SP703/704
devices include a manual reset input, a µP reset and backup-battery switchover, and power-
failure warning. The series is ideal for applications in computers, controllers, intelligent
instruments and automotive systems. All designs where it is critical to monitor the power
supply to the µP and its related digital components will find the series to be an ideal solution.
VOUT ¹
VCC ²
GND 3
PFI 4
8 _VBATT
7 RESET
6 MR
5 PFO
VBATT ^{BATTERY SWITCHOVER}
CIRCUITRY
VOUT
VCC
RESET
RESET
GENERATOR
1.25V
MR
PFI
1.25V
PFO
PINOUT
SP703/704DS/07
INTERNAL BLOCK DIAGRAM
SP703/704 Low Power Microprocessor Supervisory
1
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