SG3546(1996) データシートの表示（PDF） - Microsemi Corporation
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SG3546 Datasheet PDF : 7 Pages
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PRODUCT DATABOOK 1996/1997
3 . 3 V UNDERVOLTAGE S ENSING C IRCUIT
PR O D U C T I O N D ATA S H E E T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
SG3546
2
1.2 VREF
4
1
RESET
LOAD
FIGURE 7. — SWITCHING THE LOAD OFF WHEN
BATTERY VOLTAGE REACHES BELOW VTH
2
POWER
SUPPLY
R
1
RESET MICROPROCESSOR
CIRCUIT
CDLY
1.2 VREF
3
A time-delayed reset can be accomplished with the addition of C .
DLY
For systems with extremely fast power supply rise times (< 500ns),
it is recommended that the RCDLY time constant be greater than
5.0µs. VTH(MPU) is the microprocessor reset input threshold.
1
tDLY = R CDLY In
1
-
VTH(MPU)
VIN
FIGURE 8. — LOW VOLTAGE MICROPROCESSOR RESET
2
POWER
SUPPLY
1.0k
1
RESET
1.2 VREF
3
FIGURE 9. — VOLTAGE MONITOR
Copyright © 1994
Rev. 1.3 2/96
7
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