MC34161 Datasheet, PDF (1/16 Pages) ON Semiconductor – Universal Voltage Monitors

MC34161, MC33161
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.
• Unique Mode Select Input Allows Channel Programming
• Over, Under, and Window Voltage Detection
• Positive and Negative Voltage Detection
• Fully Functional at 2.0 V for Positive 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
Simplified Block Diagram
(Positive Voltage Window Detector Application)
VCC
8
1
2.54V
Reference
VS
7
–
++
6
2
+
2.8V
+–
1.27V
–
3
++
5
+
0.6V
+–
1.27V
4
http://onsemi.com
8
1
8
1
PDIP–8
P SUFFIX
CASE 626
SO–8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
MC3x161P
AWL
YYWW
1
8
3x161
ALYW
1
x
= 3 or 4
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
Vref 1
Input 1 2
Input 2 3
Gnd 4
8 VCC
7 Mode Select
6 Output 1
5 Output 2
(TOP VIEW)
ORDERING INFORMATION
Device
Package
Shipping
MC34161D
SO–8
98 Units/Rail
MC34161DR2
SO–8
2500 Tape & Reel
MC34161P
PDIP–8
50 Units/Rail
MC33161D
SO–8
98 Units/Rail
MC33161DR2
SO–8
2500 Tape & Reel
MC33161P
PDIP–8
50 Units/Rail
© Semiconductor Components Industries, LLC, 2000
1
April, 2000 – Rev. 2
Publication Order Number:
MC34161/D