MOTOROLA MC34064 MC33064 Data Sheet
Summary
This undervoltage sensing circuit is a specialized reset controller designed for microprocessor-based systems requiring highly reliable low voltage detection. Featuring a precise bandgap reference and built-in comparator hysteresis, it ensures stable operation down to 1.0 V while offering an economical design solution. The accompanying manual provides comprehensive technical data, electrical characteristics, temperature ranges, and varied package options (SO–8, TO–226AA, Micro–8). It is ideal for engineers designing fault-tolerant industrial, automotive, and consumer equipment that requires dependable monitoring of logic power supplies.
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The MC34064 is an undervoltage sensing circuit specifically designed for use as a reset controller in microprocessor-based systems. It offers the
UNDERVOLTAGE
designer an economical solution for low voltage detection with a single external resistor. The MC34064 features a trimmed-in-package bandgap SENSING CIRCUIT reference, and a comparator with precise thresholds and built-in hysteresis to prevent erratic reset operation. The open collector reset output is capable
SEMICONDUCTOR
of sinking in excess of 10 m A, and operation is guaranteed down to 1.0 V
input with low standby current. These devices are packaged in 3-pin TECHNICAL DATA
TO-226AA, 8-pin SO–8 and Micro–8 surface mount packages. Applications include direct monitoring of the 5.0 V MPU/logic power supply used in appliance, automotive, consumer and industrial equipment. Trimmed-In-Package Temperature Compensated Reference Comparator Threshold of 4.6 V at 25°C
P SUFFIX
Precise Comparator Thresholds Guaranteed Over Temperature
PLASTIC PACKAGE
Comparator Hysteresis Prevents Erratic Reset Pin 1. Reset
CASE 29
2. Input
(TO–226AA)
Reset Output Capable of Sinking in Excess of 10 m A
3. Ground
Internal Clamp Diode for Discharging Delay Capacitor Guaranteed Reset Operation with 1.0 V Input Low Standby Current Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages
D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8)
DM SUFFIX PLASTIC PACKAGE Representative Block Diagram CASE 846A (Micro–8)
Input 2 (2)
Reset
Reset N.C.
1 (1) Input N.C.
Ground N.C.
(Top View)
1.2 Vref
ORDERING INFORMATION
Operating Device Temperature Range Package
Gnd 3 (4)
Sink Only MC34064D–5 SO–8
Positive True Logic
MC34064DM–5 TA = 0° to +70°C Micro–8 MC34064P–5 TO–226AA
Pin numbers adjacent to terminals are for the 3–pin TO–226AA package.
MC33064D–5 SO–8
Pin numbers in parenthesis are for the 8–lead packages.
MC33064DM–5 TA = – 40° to +85°C Micro–8
This device contains 21 active transistors.
MC33064P–5 TO–226AA
Motorola, Inc. 1996 Rev 2
1MOTOROLA ANALOG IC DEVICE DATA
Page Summary Contents For MOTOROLA MC34064 MC33064 Data Sheet
Manual Details
| Brand | Motorola |
|---|---|
| Pages | 8 |
| File Size | 145.94 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What voltage range can the device monitor?
It is guaranteed to operate down to a low input of 1.0 V.
Is there built-in protection against erratic resets?
Yes, it features internal hysteresis in the comparator to prevent erratic reset operation.
Which packaging options are available for this circuit?
The devices come in 3-pin TO-226AA, 8-pin SO–8, and Micro–8 surface mount packages.
What is the maximum sink current capacity of the reset output?
The open collector reset output is capable of sinking in excess of 10 mA.