MC33164-3_05 MICROSEMI [Microsemi Corporation], MC33164-3_05 Datasheet - Page 9

• Manufacturer Part Number: MC33164-3_05
• Description: 3V UNDERVOLTAGE SENSING CIRCUIT
• Manufacturer: MICROSEMI [Microsemi Corporation]

Copyright © 1999
Rev. 1.2a 11/04
A time delayed reset can be accomplished with the addition of C
For systems with extremely fast power supply rise times (< 500ns) it
is recommended that the RC
V
Supply
TH(MPU)
Power
LED turns on when V
FIGURE 16. — LOW VOLTAGE MICROPROCESSOR RESET
Supply
Power
is the microprocessor reset input threshold.
FIGURE 18. — VOLTAGE MONITOR
V
IN
t
DLY
1.2 V
V
= R C
IN
REF
1.2V
IN
< 2.7V indicating Power Supply is low.
REF
DLY
DLY
In
time constant be greater than 5.0µs.
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
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P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
V
1
TH(MPU)
V
3 V U
IN
T Y P I C A L A P P L I C A T I O N C I R C U I T S
P
RESET
C
R O D U C T I O N
DLY
N D E R V O L T A G E
RESET
R
Microprocessor
1.0k
Circuit
DLY
.
S
D
E N S I N G
A T A
FIGURE 20. — SOLAR POWERED BATTERY CHARGER
FIGURE 17. — SWITCHING THE LOAD OFF WHEN
V
IN
V
S
IN
1.2V
MC33164-3/MC34164-3
1.2V
C
H E E T
REF
I R C U I T
BATTERY REACHES BELOW 2.7V
REF
RESET
RESET
SOLAR
CELLS
Load
9