LinearVoltageRegulators Motorola Semiconductor Products, LinearVoltageRegulators Datasheet - Page 35

• Manufacturer Part Number: LinearVoltageRegulators
• Description: Analog And Interface Integratedcircuits Selector Guide & Cross Reference
• Manufacturer: Motorola Semiconductor Products

Supervisory Circuits
Universal Voltage Monitor
MC34161P, D
T A = 0 to +70 C, Case 626, 751
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.
negative voltages used in appliance, automotive, consumer,
and industrial equipment.
Input V S2
Input –V S1
Pins 5, 6
MOTOROLA
64
Voltage
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
Pinned Out 2.54 V Reference with Current Limit Protection
Low Standby Current
Open Collector Outputs for Enhanced Device Flexibility
Output
4.0 V for Negative Voltage Sensing
The MC34161, MC33161 series are universal voltage
Applications include direct monitoring of positive and
V CC
Gnd
Gnd
V 4
V 3
V 1
V 2
V CC (>2.0 V)
Mode Select
Pin 7
GND
V ref
(continued)
POSITIVE AND NEGATIVE OVERVOLTAGE DETECTOR
Input 1
Pin 2
V Hys1
V Hys2
0
1
0
1
0
1
LED “On”
Output 1
Pin 6
0
1
0
1
1
0
TRUTH TABLE
Input 2
Pin 3
0
1
0
1
0
1
MC33161P, D
T A = –40 to +85 C, Case 626, 751
Input 1
Input 2
Select
Mode
Output 2
V ref
–V S1
ANALOG AND INTERFACE INTEGRATED CIRCUITS
V S2
Pin 5
0
1
1
0
1
0
1
7
2
3
R 2
R 3
R 1
R 4
SELECTOR GUIDE & CROSS REFERENCE
Channels 1 & 2: Noninverting
Channel 1: Noninverting
Channel 2: Inverting
Channels 1 & 2: Inverting
1.27 V
1.27 V
1
7
2
3
+
+
Comments
Gnd
1.27 V
1.27 V
+
–
+
–
Reference
2.54 V
V CC
2.8 V
0.6 V
Reference
+
+
8
4
4
2.54 V
0.6 V
+
–
+
2.8 V
–
V CC
8
Channel 1
Channel 2
6
5
5
6
Output 1
Output 2