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PDF MC33161 Data sheet ( Hoja de datos )
| Número de pieza | MC33161 | |
| Descripción | UNIVERSAL VOLTAGE MONITORS | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC33161 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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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 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
Order this document by MC34161/D
MC34161
MC33161
UNIVERSAL VOLTAGE
MONITORS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Simplified Block Diagram
(Positive Voltage Window Detector Application)
VCC
8
1 2.54V
Reference
VS 7
–
2
+
++
2.8V
+–
1.27V
–
3
+
++
0.6V
+–
1.27V
6
5
4
MOTOROLA ANALOG IC DEVICE DATA
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
MC34161D
MC34161P
Operating
Temperature Range
TA = 0° to +70°C
Package
SO–8
Plastic DIP
MC33161D
MC33161P
TA = –40° to +85°C
SO–8
Plastic DIP
© Motorola, Inc. 1998
Rev 1.1
1
1 page  
MC34161 MC33161
Figure 13. MC34161 Representative Block Diagram
Vref
1
Mode Select
7
Input 1
2+
+
–
1.27V
Input 2
3+
+
–
1.27V
VCC
8
2.54V
Reference
–
++
2.8V
Channel 1
Output 1
6
–
++
0.6V
Channel 2
Output 2
5
Gnd 4
Mode Select
Pin 7
GND
Vref
VCC (>2.0 V)
Figure 14. Truth Table
Input 1
Pin 2
0
1
0
1
0
1
Output 1
Pin 6
0
1
0
1
1
0
Input 2
Pin 3
0
1
0
1
0
1
Output 2
Pin 5
0
1
1
0
1
0
Comments
Channels 1 & 2: Noninverting
Channel 1: Noninverting
Channel 2: Inverting
Channels 1 & 2: Inverting
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page 
MC34161 MC33161
Figure 23. Overvoltage Detector with Audio Alarm
Input VS
V2
V1
Output
Voltage
Pins 5, 6
Gnd
VCC
Gnd
VHys
Osc ‘ON’
VS
R2
R1
VCC
8
2.54V
1 Reference
7
+
2+ –
1.27V
+
3+ –
1.27V
–
++
2.8V
–
++
0.6V
4
RA
Piezo
6
5
CT RB
The above figure shows the MC34161 configured as an overvoltage detector with an audio alarm. Channel 1 monitors input voltage VS while channel 2 is connected
as a simple RC oscillator. As the input voltage increases from ground, the output of channel 1 allows the oscillator to turn ‘ON’ when VS exceeds V2.
For known resistor values, the voltage trip points are:
+ * ǒ ) Ǔ + ǒ ) ǓV1
(Vth
VH)
R2
R1
1 V2
Vth
R2
R1
1
For a specific trip voltage, the required resistor ratio is:
+ * * + *R2
R1
V1
Vth VH
1
R2
R1
V2
Vth
1
Input VS
V2
V1
Output
Voltage
Pin 5
Gnd
VCC
Gnd
Output
Voltage
Pin 6
VCC
Gnd
Figure 24. Microprocessor Reset with Time Delay
VCC
8
VHys
tDLY
Reset LED ‘ON’
VS
R2
R1
2.54V
1 Reference
7
+
2+ –
1.27V
+
3+ –
1.27V
–
++
2.8V
–
++
0.6V
4
R3
6
RDLY
5
CDLY
The above figure shows the MC34161 configured as a microprocessor reset with a time delay. Channel 2 monitors input voltage VS while channel 1 performs the time
delay function. As the input voltage decreases towards ground, the output of channel 2 quickly discharges CDLY when VS falls below V1. As the input voltage increases
from ground, the output of channel 2 allows RDLY to charge CDLY when VS exceeds V2.
For known resistor values, the voltage trip points are:
+ * ǒ ) Ǔ + ǒ ) ǓV1
(Vth
VH)
R2
R1
1
V2
Vth
R2
R1
1
For a specific trip voltage, the required resistor ratio is:
+ * * + *R2
R1
V1
Vth VH
1
R2
R1
V2
Vth
1
For known RDLY CDLY values, the reset time delay is:
tDLY = RDLYCDLY In
1
1
–
Vth
VCC
MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MC33161.PDF ] | |
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