MC34161, MC33161,
NCV33161
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.
Features
http://onsemi.com
MARKING
DIAGRAMS
8
PDIP−8
P SUFFIX
CASE 626
1
1
8
SOIC−8
D SUFFIX
CASE 751
1
8
Micro8t
DM SUFFIX
CASE 846A
1
1
x
= 3 or 4
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
x161
AYW
G
G
3x161
ALYW
G
MC3x161P
AWL
YYWWG
•
•
•
•
•
•
•
•
•
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
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available
V
CC
8
1
2.54V
Reference
−
2
+
+
−
1.27V
3
+
+
−
1.27V
+
−
+
0.6V
5
+
+
2.8V
6
1
PIN CONNECTIONS
V
ref
Input 1
Input 2
GND
1
2
3
4
(TOP VIEW)
8
7
6
5
V
CC
Mode Select
Output 1
Output 2
V
S
7
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
4
This device contains
141 transistors.
Figure 1. Simplified Block Diagram
(Positive Voltage Window Detector Application)
©
Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 9
Publication Order Number:
MC34161/D
ONSEMI [ ON SEMICONDUCTOR ]
