MC34164DM Microsemi Analog Mixed Signal Group, MC34164DM Datasheet - Page 7

• Manufacturer Part Number: MC34164DM
• Description: IC UNDERVOLTAGE SENSING 8SOIC
• Manufacturer: Microsemi Analog Mixed Signal Group
• Type: Simple Reset/Power-On Resetr

Specifications of MC34164DM

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Voltage - Threshold: 4.3V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Reset Timeout: -

Copyright © 1997
Rev. 1.5a 9/17/2004
POWER
SUPPLY
FIGURE 7. — SWITCHING THE LOAD OFF WHEN
2
1.2 V
BATTERY VOLTAGE REACHES BELOW 4.3V
4
REF
FIGURE 9. — VOLTAGE MONITOR
2
1.2 V
3
REF
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
5 V U
1
RESET
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
P
R O D U C T I O N
N D E R V O L T A G E
RESET
1
1.0k
LOAD
D
S
4.3V
POWER
SUPPLY
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
Overheating of the logic level power MOSFET due to insufficient
gate voltage can be prevented with the above circuit. When the
input signal is below the 4.3 volt threshold of the MC34164, its
output grounds the gate of the L
E N S I N G
TH(MPU)
A T A
FIGURE 10. — MOSFET LOW-VOLTAGE GATE DRIVE PROTECTION
FIGURE 8. — LOW-VOLTAGE MICROPROCESSOR RESET
is the microprocessor reset input threshold.
S
2
H E E T
1.2 V
C
t
I R C U I T
DLY
2
3
REF
1.2 V
= R C
MC33164/MC34164
3
REF
DLY
DLY
In
time constant be greater than 5.0µs.
2
1 -
270
MOSFET.
V
1
TH(MPU)
V
1
IN
1
R
RESET
C
DLY
MICROPROCESSOR
V
CIRCUIT
CC
R
SMP60N03-10L
L
DLY
.
7