Order this document by MC34164/D
MC34164
MC33164
Micropower Undervoltage
Sensing Circuits
The MC34164 series are undervoltage sensing circuits specifically
designed for use as reset controllers in portable microprocessor based
systems where extended battery life is required. These devices offer the
designer an economical solution for low voltage detection with a single
external resistor. The MC34164 series features a bandgap reference, a
comparator with precise thresholds and built–in hysteresis to prevent erratic
reset operation, an open collector reset output capable of sinking in excess
of 6.0 mA, and guaranteed operation down to 1.0 V input with extremely low
standby current. These devices are packaged in 3–pin TO–226AA, 8–pin
SO–8 and Micro–8 surface mount packages.
Applications include direct monitoring of the 3.0 or 5.0 V MPU/logic power
supply used in appliance, automotive, consumer, and industrial equipment.
• Temperature Compensated Reference
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MICROPOWER
UNDERVOLTAGE
SENSING CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–226AA)
Monitors 3.0 V (MC34164–3) or 5.0 V (MC34164–5) Power Supplies
1
Pin 1. Reset
2. Input
3. Ground
2
3
Precise Comparator Thresholds Guaranteed Over Temperature
Comparator Hysteresis Prevents Erratic Reset
Reset Output Capable of Sinking in Excess of 6.0 mA
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Internal Clamp Diode for Discharging Delay Capacitor
Guaranteed Reset Operation With 1.0 V Input
Extremely Low Standby Current: As Low as 9.0 µA
8
1
Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
Representative Block Diagram
8
1
Reset
7 N.C.
6 N.C.
Ground 4
2 (2)
8 N.C.
Input 2
N.C. 3
Input
Reset 1
5 N.C.
(Top View)
1 (1)
ORDERING INFORMATION
Device
1.2 Vref
Gnd
3 (4)
= Sink Only
Positive True Logic
Pin numbers adjacent to terminals are for the 3–pin TO–226AA package.
Pin numbers in parenthesis are for the 8–lead packages.
This device contains 28 active transistors.
MC34164D–3
MC34164D–5
MC34164DM–3
MC34164DM–5
MC34164P–3
MC34164P–5
MC33164D–3
MC33164D–5
MC33164DM–3
MC33164DM–5
MC33164P–3
MC33164P–5
© Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Operating
Temperature Range
Package
SO–8
TA = 0° to +70°C
Micro–8
TO–226AA
SO–8
TA = –40° to +125°C
Micro–8
TO–226AA
Rev 1
1
