Order this document by MC34161/D
Universal Voltage Monitors
The MC34161/MC33161 are universal voltage monitors intended for use
in a wide variety of voltage sensing applications. These devices offer the
circuit designer an economical solution for positive and negative voltage
detection. The circuit consists of two comparator channels each with
hysteresis, a unique Mode Select Input for channel programming, a pinned
out 2.54 V reference, and two open collector outputs capable of sinking in
excess of 10 mA. Each comparator channel can be configured as either
inverting or noninverting by the Mode Select Input. This allows over, under,
and window detection of positive and negative voltages. The minimum
supply voltage needed for these devices to be fully functional is 2.0 V for
positive voltage sensing and 4.0 V for negative voltage sensing.
Applications include direct monitoring of positive and negative voltages
used in appliance, automotive, consumer, and industrial equipment.
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Unique Mode Select Input Allows Channel Programming
MC34161
MC33161
UNIVERSAL VOLTAGE
MONITORS
SEMICONDUCTOR
TECHNICAL DATA
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P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
Over, Under, and Window Voltage Detection
Positive and Negative Voltage Detection
Fully Functional at 2.0 V for Positve Voltage Sensing and 4.0 V for
Negative Voltage Sensing
Pinned Out 2.54 V Reference with Current Limit Protection
Low Standby Current
Open Collector Outputs for Enhanced Device Flexibility
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
Simplified Block Diagram
(Positive Voltage Window Detector Application)
VCC
Vref
Input 1
Input 2
Gnd
2.54V
Reference
–
2
+
+
–
1.27V
3
+
+
–
1.27V
+
–
+
0.6V
Device
MC34161D
MC34161P
4
MC33161D
MC33161P
5
+
+
2.8V
6
1
2
3
4
(TOP VIEW)
8
7
6
5
VCC
Mode Select
Output 1
Output 2
8
1
VS
7
ORDERING INFORMATION
Operating
Temperature Range
TA = 0° to +70°C
Package
SO–8
Plastic DIP
SO–8
Plastic DIP
Rev 1.1
TA = –40° to +85°C
©
Motorola, Inc. 1998
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
