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MC34064 Datasheet, PDF (1/8 Pages) ON Semiconductor – UNDERVOLTAGE SENSING CIRCUIT | |||
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Undervoltage Sensing Circuit
The MC34064 is an undervoltage sensing circuit specifically designed for
use as a reset controller in microprocessor-based systems. It offers the
designer an economical solution for low voltage detection with a single
external resistor. The MC34064 features a trimmed-in-package bandgap
reference, and a comparator with precise thresholds and built-in hysteresis
to prevent erratic reset operation. The open collector reset output is capable
of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V
input with low standby current. These devices are packaged in 3-pin
TO-226AA, 8-pin SOâ8 and Microâ8 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
⢠Precise Comparator Thresholds Guaranteed Over Temperature
⢠Comparator Hysteresis Prevents Erratic Reset
⢠Reset Output Capable of Sinking in Excess of 10 mA
⢠Internal Clamp Diode for Discharging Delay Capacitor
⢠Guaranteed Reset Operation with 1.0 V Input
⢠Low Standby Current
⢠Economical TOâ226AA, SOâ8 and Microâ8 Surface Mount Packages
Order this document by MC34064/D
MC34064
MC33064
UNDERVOLTAGE
SENSING CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TOâ226AA)
123
Pin 1. Reset
2. Input
3. Ground
D SUFFIX
PLASTIC PACKAGE 8
CASE 751
1
(SOâ8)
Representative Block Diagram
Input 2 (2)
Reset
1 (1)
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Microâ8)
8
1
Reset 1
Input 2
N.C. 3
Ground 4
8 N.C.
7 N.C.
6 N.C.
5 N.C.
(Top View)
1.2 Vref
Gnd 3 (4)
=
Sink Only
Positive True Logic
Pin numbers adjacent to terminals are for the 3âpin TOâ226AA package.
Pin numbers in parenthesis are for the 8âlead packages.
This device contains 21 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34064Dâ5
MC34064DMâ5
MC34064Pâ5
TA = 0° to +70°C
SOâ8
Microâ8
TOâ226AA
MC33064Dâ5
SOâ8
MC33064DMâ5 TA = â 40° to +85°C Microâ8
MC33064Pâ5
TOâ226AA
© Motorola, Inc. 1996
Rev 2
1
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