MC34161P [MOTOROLA]
UNIVERSAL VOLTAGE MONITORS; 通用电压监测器
| 型号： | MC34161P |
| 厂家： | 
MOTOROLA |
| 描述： | UNIVERSAL VOLTAGE MONITORS |
| 文件： | 总16页 (文件大小：296K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by MC34161/D
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.
UNIVERSAL VOLTAGE
MONITORS
SEMICONDUCTOR
TECHNICAL DATA
Applications include direct monitoring of positive and negative voltages
used in appliance, automotive, consumer, and industrial equipment.
P SUFFIX
PLASTIC PACKAGE
CASE 626
• Unique Mode Select Input Allows Channel Programming
• Over, Under, and Window Voltage Detection
• Positive and Negative Voltage Detection
8
1
• 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
D SUFFIX
PLASTIC PACKAGE
8
CASE 751
(SO–8)
1
PIN CONNECTIONS
Simplified Block Diagram
(Positive Voltage Window Detector Application)
V
1
2
3
4
8
7
6
5
V
CC
ref
V
CC
Input 1
Mode Select
Output 1
Input 2
Gnd
8
Output 2
1
2.54V
Reference
(TOP VIEW)
V
S
7
2
–
+
6
5
+
2.8V
+
–
+
+
1.27V
–
ORDERING INFORMATION
Operating
+
+
3
0.6V
+
Temperature Range
Device
Package
–
MC34161D
MC34161P
SO–8
1.27V
T
A
= 0° to +70°C
Plastic DIP
MC33161D
MC33161P
SO–8
4
T
A
= –40° to +85°C
Plastic DIP
Motorola, Inc. 1998
Rev 1.1
MC34161 MC33161
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
V
Power Supply Input Voltage
V
CC
40
– 1.0 to +40
20
Comparator Input Voltage Range
Comparator Output Sink Current (Pins 5 and 6) (Note 1)
Comparator Output Voltage
V
in
V
I
mA
V
Sink
V
out
40
Power Dissipation and Thermal Characteristics (Note 1)
P Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ T = 70°C
Thermal Resistance, Junction–to–Air
D Suffix, Plastic Package, Case 751
P
800
100
mW
°C/W
A
D
R
θJA
Maximum Power Dissipation @ T = 70°C
Thermal Resistance, Junction–to–Air
P
450
178
mW
°C/W
A
D
R
θJA
Operating Junction Temperature
T
+150
°C
°C
J
Operating Ambient Temperature (Note 3)
MC34161
MC33161
T
A
0 to +70
– 40 to +85
Storage Temperature Range
T
stg
– 55 to +150
°C
ELECTRICAL CHARACTERISTICS (V
= 5.0 V, for typical values T = 25°C, for min/max values T is the operating
A A
CC
ambient temperature range that applies [Notes 2 and 3], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
COMPARATOR INPUTS
Threshold Voltage, V Increasing (T = 25°C)
V
th
1.245
1.235
1.27
–
1.295
1.295
V
in
A
Threshold Voltage, V Increasing (T = T
to T
)
max
in
A
min
Threshold Voltage Variation (V
= 2.0 V to 40 V)
∆V
th
–
15
–
7.0
25
15
35
mV
mV
mV
V
CC
Threshold Hysteresis, V Decreasing
in
V
H
Threshold Difference |V
– V
|
V
D
1.0
1.27
15
th1
th2
Reference to Threshold Difference (V – V ), (V – V
)
V
RTD
1.20
1.32
ref in1 ref in2
Input Bias Current (V = 1.0 V)
Input Bias Current (V = 1.5 V)
in
I
IB
–
–
40
85
200
400
nA
in
MODE SELECT INPUT
Mode Select Threshold Voltage (Figure 5) Channel 1
Mode Select Threshold Voltage (Figure 5) Channel 2
V
V
V
+0.15
0.3
V
+0.23
0.63
V
+0.30
0.9
V
th(CH 1)
th(CH 2)
ref
ref
ref
COMPARATOR OUTPUTS
Output Sink Saturation Voltage (I
Output Sink Saturation Voltage (I
Output Sink Saturation Voltage (I
= 2.0 mA)
= 10 mA)
= 0.25 mA, V
V
OL
–
–
–
0.05
0.22
0.02
0.3
0.6
0.2
V
Sink
Sink
Sink
= 1.0 V)
CC
Off–State Leakage Current (V
= 40 V)
I
–
0
1.0
µA
OH
OH
REFERENCE OUTPUT
Output Voltage (I = 0 mA, T = 25°C)
V
2.48
–
2.54
0.6
5.0
–
2.60
15
V
O
A
ref
Reg
Load Regulation (I = 0 mA to 2.0 mA)
mV
mV
V
O
load
Line Regulation (V
CC
= 4.0 V to 40 V)
Reg
–
15
line
Total Output Variation over Line, Load, and Temperature
Short Circuit Current
∆V
2.45
–
2.60
30
ref
I
8.5
mA
SC
TOTAL DEVICE
Power Supply Current (V
Power Supply Current (V
, V , V
= Gnd) (V
= 5.0 V)
= 40 V)
I
CC
–
–
450
560
700
900
µA
Mode in1 in2
CC
CC
, V 1, V 2 = Gd) (V
Mode in in
Operating Voltage Range (Positive Sensing)
Operating Voltage Range (Negative Sensing)
V
CC
2.0
4.0
–
–
40
40
V
NOTES: 1. Maximum package power dissipation must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. T
=
0°C for MC34161
–40°C for MC33161
T
= +70°C for MC34161
+85°C for MC33161
low
high
2
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 2. Comparator Input Bias Current
versus Input Voltage
Figure 1. Comparator Input Threshold Voltage
6.0
500
400
300
200
100
V
R
= 5.0 V
= 10 k to V
CC
L
CC
V
V
CC
5.0
4.0
3.0
2.0
1.0
T
A = 25°C
T
A
T
= 85
= 25
°
°
C
C
A
T
= 85
= 25
= –40
°
°
C
C
A
T
A
T
A
T
= –40°C
T
°C
A
A
0
1.22
0
1.23
1.24
1.25
1.26
1.27
1.28
1.29
0
1.0
2.0
V , INPUT VOLTAGE (V)
in
3.0
4.0
5.0
V
, INPUT VOLTAGE (V)
in
Figure 3. Output Propagation Delay Time
versus Percent Overdrive
Figure 4. Output Voltage versus Supply Voltage
3600
3000
2400
8.0
V
T
= 5.0 V
= 25°C
Undervoltage Detector
Programmed to trip at 4.5 V
CC
A
1. V
2. V
3. V
4. V
= Gnd, Output Falling
Mode
Mode
Mode
Mode
= V , Output Rising
CC
R
R
= 1.8 k, R = 4.7 k
= 10 k to V
CC
= V , Output Falling
CC
1
L
2
6.0
4.0
2.0
0
= Gnd, Output Rising
Refer to Figure 16
1800
1200
1
2
T
= –40
= –25
= –85°C
°
°
C
C
A
3
T
A
A
T
4
600
0
2.0
4.0
6.0
8.0
10
0
2.0
4.0
, SUPPLY VOLTAGE (V)
6.0
8.0
PERCENT OVERDRIVE (%)
V
CC
Figure 6. Mode Select Input Current
versus Input Voltage
Figure 5. Mode Select Thresholds
6.0
40
V
= 5.0 V
= 25°C
Channel 2 Threshold
Channel 1 Threshold
CC
35
30
25
20
15
10
5.0
4.0
3.0
2.0
1.0
0
T
A
V
R
= 5.0 V
= 10 k to V
CC
L
CC
T
T
T
= 85°C
= 25°C
= –40°C
A
A
A
T
= 85
= 25
°
C
C
A
T
= –40°C
A
T
°
A
5.0
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
1.0
2.0
3.0
4.0
5.0
V
, MODE SELECT INPUT VOLTAGE (V)
V , MODE SELECT INPUT VOLTAGE (V)
Mode
Mode
3
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 7. Reference Voltage
versus Supply Voltage
Figure 8. Reference Voltage
versus Ambient Temperature
2.8
2.610
2.578
2.546
2.514
V
Max = 2.60 V
ref
2.4
2.0
1.6
1.2
0.8
V
Typ = 2.54 V
ref
V
V
= 5.0 V
CC
= Gnd
Mode
2.482
2.450
V
= Gnd
Mode
= 25
0.4
0
T
°C
V
Min = 2.48 V
A
ref
0
10
20
30
40
8.0
40
–55
–25
0
25
50
75
100
125
V
, SUPPLY VOLTAGE (V)
T , AMBIENT TEMPERATURE (°C)
CC
A
Figure 9. Reference Voltage Change
versus Source Current
Figure 10. Output Saturation Voltage
versus Output Sink Current
0
–2.0
–4.0
–6.0
0.5
0.4
0.3
V
V
= 5.0 V
CC
= Gnd
Mode
T
= 85°C
A
T
= 25°C
A
V
V
= 5.0 V
CC
= Gnd
Mode
0.2
0.1
0
T
= –40°C
A
–8.0
–10
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0
4.0
8.0
12
16
I
, REFERENCE SOURCE CURRENT (mA)
I , OUTPUT SINK CURRENT (mA)
out
ref
Figure 11. Supply Current versus
Supply Voltage
Figure 12. Supply Current
versus Output Sink Current
1.6
0.8
V
= V
CC
Mode
Pins 2, 3 = Gnd
V
= Gnd
Mode
Pins 2, 3 = 1.5 V
0.6
0.4
1.2
0.8
V
= V
ref
Mode
Pin 1 = 1.5 V
Pin 2 = Gnd
V
V
= 5.0 V
CC
0.2
0
= Gnd
0.4
Mode
I
T
measured at Pin 8
CC
= 25°C
T
= 25
°C
A
A
0
0
10
20
, SUPPLY VOLTAGE (V)
30
0
4.0
8.0
12
16
V
I
, OUTPUT SINK CURRENT (mA)
CC
out
4
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 13. MC34161 Representative Block Diagram
V
CC
8
2.54V
Reference
V
ref
1
Channel 1
Mode Select
Input 1
–
7
2
+
+
Output 1
2.8V
+
6
5
–
+
+
1.27V
Channel 2
–
+
+
Output 2
0.6V
Input 2
+
3
–
1.27V
4
Gnd
Figure 14. Truth Table
Mode Select
Pin 7
Input 1
Pin 2
Output 1
Pin 6
Input 2
Pin 3
Output 2
Pin 5
Comments
GND
0
1
0
1
0
1
0
1
Channels 1 & 2: Noninverting
V
ref
0
1
0
1
0
1
1
0
Channel 1: Noninverting
Channel 2: Inverting
V
CC
(>2.0 V)
0
1
1
0
0
1
1
0
Channels 1 & 2: Inverting
5
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
FUNCTIONAL DESCRIPTION
Introduction
Reference
To be competitive in today’s electronic equipment market,
new circuits must be designed to increase system reliability
with minimal incremental cost. The circuit designer can take a
significant step toward attaining these goals by implementing
economical circuitry that continuously monitors critical circuit
voltages and provides a fault signal in the event of an
out–of–tolerance condition. The MC34161, MC33161 series
are universal voltage monitors intended for use in a wide
variety of voltage sensing applications. The main objectives
of this series was to configure a device that can be used in as
many voltage sensing applications as possible while
minimizing cost. The flexibility objective is achieved by the
utilization of a unique Mode Select input that is used in
conjunction with traditional circuit building blocks. The cost
objective is achieved by processing the device on a standard
Bipolar Analog flow, and by limiting the package to eight pins.
The device consists of two comparator channels each with
hysteresis, a mode select input for channel programming, a
pinned out reference, and two open collector outputs. Each
comparator channel can be configured as either inverting or
noninverting by the Mode Select input. This allows a single
device to perform over, under, and window detection of
positive and negative voltages. A detailed description of each
section of the device is given below with the representative
block diagram shown in Figure 13.
The 2.54 V reference is pinned out to provide a means for
the input comparators to sense negative voltages, as well as
a means to program the Mode Select input for window
detection applications. The reference is capable of sourcing
in excess of 2.0 mA output current and has built–in short
circuit protection. The output voltage has a guaranteed
tolerance of ±2.4% at room temperature.
The 2.54 V reference is derived by gaining up the internal
1.27 V reference by a factor of two. With a power supply
voltage of 4.0 V, the 2.54 V reference is in full regulation,
allowing the device to accurately sense negative voltages.
Mode Select Circuit
The key feature that allows this device to be flexible is the
Mode Select input. This input allows the user to program
each of the channels for various types of voltage sensing
applications. Figure 14 shows that the Mode Select input has
three defined states. These states determine whether
Channel 1 and/or Channel 2 operate in the inverting or
noninverting mode. The Mode Select thresholds are shown in
Figure 5. The input circuitry forms a tristate switch with
thresholds at 0.63 V and V + 0.23 V. The mode select input
ref
current is 10 µA when connected to the reference output, and
42 µA when connected to a V
of 5.0 V, refer to Figure 6.
CC
Output Stage
Input Comparators
The output stage uses a positive feedback base boost
circuit for enhanced sink saturation, while maintaining a
relatively low device standby current. Figure 10 shows that
the sink saturation voltage is about 0.2 V at 8.0 mA over
temperature. By combining the low output saturation
characteristics with low voltage comparator operation, this
The input comparators of each channel are identical, each
having an upper threshold voltage of 1.27 V ±2.0% with 25
mV of hysteresis. The hysteresis is provided to enhance
output switching by preventing oscillations as the comparator
thresholds are crossed. The comparators have an input bias
current of 60 nA at their threshold which approximates a
21.2 MΩ resistor to ground. This high impedance minimizes
loading of the external voltage divider for well defined trip
points. For all positive voltage sensing applications, both
device is capable of sensing positive voltages at a V
1.0 V. These characteristics are important in undervoltage
sensing applications where the output must stay in a low
of
CC
state as V
approaches ground. Figure 4 shows the Output
CC
comparator channels are fully functional at a V
of 2.0 V. In
CC
Voltage versus Supply Voltage in an undervoltage sensing
application. Note that as V drops below the programmed
order to provide enhanced device ruggedness for hostile
industrial environments, additional circuitry was designed
into the inputs to prevent device latch–up as well as to
suppress electrostatic discharges (ESD).
CC
4.5 V trip point, the output stays in a well defined active low
state until V drops below 1.0 V.
CC
APPLICATIONS
The following circuit figures illustrate the flexibility of this
device. Included are voltage sensing applications for over,
under, and window detectors, as well as three unique
configurations. Many of the voltage detection circuits are
shown with the open collector outputs of each channel
connected together driving a light emitting diode (LED). This
‘ORed’ connection is shown for ease of explanation and it is
only required for window detection applications. Note that
many of the voltage detection circuits are shown with a
dashed line output connection. This connection gives the
inverse function of the solid line connection. For example, the
solid line output connection of Figure 15 has the LED ‘ON’
when input voltage V is above trip voltage V , for
S
2
overvoltage detection. The dashed line output connection
has the LED ‘ON’ when V is below trip voltage V , for
S
2
undervoltage detection.
6
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 15. Dual Postive Overvoltage Detector
V
CC
8
V
V
2
2.54V
Reference
Input V
Output
V
S
Hys
1
7
2
V
S1
1
–
+
+
+
R
2
Gnd
2.8V
+
–
6
5
V
V
+
+
CC
S2
R
1
Voltage
Pins 5, 6
1.27V
–
+
LED ‘ON’
Gnd
R
2
0.6V
+
–
3
R
1
1.27V
4
The above figure shows the MC34161 configured as a dual positive overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’ when
or V exceeds V . With the dashed line output connection, the circuit becomes a dual positive undervoltage detector. As the input voltage decreases from the
V
S1
S2
2
peak towards ground, the LED will turn ‘ON’ when V or V falls below V .
S1 S2
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
th
R
R
R
V
R
R
V
V
2
1
2
1
2
1
1
2
1
2
V
(V
V )
1
V
V
1
1
1
1
th
H
2
V
V
H
th
th
Figure 16. Dual Postive Undervoltage Detector
V
CC
8
2.54V
Reference
V
V
2
1
Input V
Output
S
V
Hys
V
S1
–
+
2.8V
1
7
2
+
+
R
2
+
–
6
5
Gnd
+
+
V
S2
R
V
1
1.27V
CC
–
+
0.6V
Voltage
Pins 5, 6
LED ‘ON’
R
2
Gnd
+
–
3
R
1
1.27V
4
The above figure shows the MC34161 configured as a dual positive undervoltage detector. As the input voltage decreases towards ground, the LED will turn ‘ON’
when V or V falls below V . With the dashed line output connection, the circuit becomes a dual positive overvoltage detector. As the input voltage increases from
S1
S2
1
ground, the LED will turn ‘ON’ when V or V exceeds V .
S1 S2
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
V
R
R
V
V
R
R
R
R
2
1
1
2
1
2
2
1
2
1
1
1
V
(V
V )
1
V
V
th
1
1
th
H
2
V
V
H
th
th
7
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 17. Dual Negative Overvoltage Detector
V
CC
8
2.54V
Reference
Gnd
1
R
2
–
7
2
V
1
+
+
+
2.8V
R1
Input –V
V
+
–
S
Hys
6
5
–V
S1
+
+
V
2
1.27V
–
+
R
2
Output
Voltage
Pins 5, 6
V
CC
Gnd
R1
0.6V
+
–
–V
S2
LED ‘ON’
3
1.27V
4
The above figure shows the MC34161 configured as a dual negative overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’ when
–V or –V exceeds V . With the dashed line output connection, the circuit becomes a dual negative undervoltage detector. As the input voltage decreases from
S1
S2
2
the peak towards ground, the LED will turn ‘ON’ when –V or –V falls below V .
S1
S2
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
R
R
V
V
V
R
R
V
V
V
V
V
1
2
1
2
1
2
1
th
1
2
2
th
H
H
V
(V
V
)
V
V
(V
V
V
)
V
V
H
1
th
ref
th
2
th
H
ref
th
V
V
th
ref
th
ref
Figure 18. Dual Negative Undervoltage Detector
V
CC
8
2.54V
Reference
1
R
2
Gnd
–
+
2.8V
7
2
+
+
R1
V
1
+
–
6
5
–V
S1
V
+
+
Hys
Input –V
S
1.27V
V
–
+
0.6V
2
R
R1
2
Output
Voltage
Pins 5, 6
V
CC
–V
S2
+
–
3
LED ‘ON’
1.27V
Gnd
4
The above figure shows the MC34161 configured as a dual negative undervoltage detector. As the input voltage decreases towards ground, the LED will turn ‘ON’
when –V or –V falls below V . With the dashed line output connection, the circuit becomes a dual negative overvoltage detector. As the input voltage increases
S1
S2
1
from ground, the LED will turn ‘ON’ when –V or –V exceeds V .
S1
S2
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
R
R
V
V
V
R
R
V
V
V
V
V
1
2
1
2
1
2
1
th
1
2
2
th
H
H
V
(V
V
)
V
V
(V
V
V
)
V
V
H
1
th
ref
th
2
th
H
ref
th
V
V
th
ref
th
ref
8
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 19. Positive Voltage Window Detector
V
CC
8
2.54V
Reference
V
V
4
3
CH2
CH1
V
Hys2
V
1
7
2
S
Input V
Output
S
–
V
V
2
1
V
Hys1
+
+
R
3
2.8V
+
–
6
5
+
+
Gnd
1.27V
R
–
+
0.6V
2
1
V
+
CC
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
LED ‘ON’
Voltage
Pins 5, 6
+
–
3
Gnd
R
1.27V
4
The above figure shows the MC34161 configured as a positive voltage window detector. This is accomplished by connecting channel 1 as an undervoltage detector,
and channel 2 as an overvoltage detector. When the input voltage V falls out of the window established by V and V , the LED will turn ‘ON’. As the input voltage
S
2
1
4
falls within the window, V increasing from ground and exceeding V , or V decreasing from the peak towards ground and falling below V , the LED will turn ‘OFF’.
S
S
3
With the dashed line output connection, the LED will turn ‘ON’ when the input voltage V is within the window.
S
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
3
R
R
R
R
V (V
3
V
V
)
)
R
R
V (V
V
V
)
H1
2
3
2
1
th2
th1
H2
H1
3
1
3
1
th1
V
V
(V
V
)
1
V
V
(V
V )
H2
1
1
1
2
th1
H1
3
4
th2
R
R
R
1
V (V
V (V
V
)
1
2
1
1
1
th2
H2
R
R
R
R
R
V
V
x
V
R
R
V (V
V
V
)
3
2
3
2
1
4
2
th2
3
1
4
2
th1
V
1
V
1
th1
th2
R
R
R
1
x
V
V
x
2
1
2
th1
th2
V
CC
Figure 20. Negative Voltage Window Detector
8
2.54V
Reference
1
Gnd
–
+
2.8V
V
V
1
CH2
CH1
V
Hys2
7
2
+
+
R
R
R
3
2
Input –V
+
–
S
6
5
V
V
+
3
4
V
Hys1
1.27V
–
+
0.6V
2
V
Output
Voltage
CC
Gnd
+
–
‘ON’
LED ‘OFF’
LED ‘ON’
‘OFF’
LED ‘ON’
3
+
1
Pins 5, 6
1.27V
–V
S
4
The above figure shows the MC34161 configured as a negative voltage window detector. When the input voltage –V falls out of the window established by V and
S
1
V , theLEDwillturn‘ON’. Astheinputvoltagefallswithinthewindow, –V increasingfromgroundandexceedingV , or–V decreasingfromthepeaktowardsground
4
S
2
S
and falling below V , the LED will turn ‘OFF’. With the dashed line output connection, the LED will turn ‘ON’ when the input voltage –V is within the window.
3
S
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R (V
1
V
)
R
R
R
R
V
V
th2
th2
2
ref
1
1
3
3
1
V
V
V
V
V
1
2
3
4
th2
)
R
R
R
R
R
R
R
R
R
R
V
V
3
2
2
1
1
3
3
2
2
th2
ref
R (V
1
V
V
V
V
V
H2
th2
R
H2
R
ref
2
th2
V
V
th2
H2
th1
V
V
V
2
3
th2
H2
ref
(R
1
R )(V
2
V
V
)
V
V
th1
ref
th1
ref
V
th1
)
R
V
V
th1
3
3
(R
1
R )(V
V
V
V
V
2
th1
R
H1
ref
th1
H1
ref
V
V
H1
V
V
V
th1
3
4
H1
9
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 21. Positive and Negative Overvoltage Detector
V
CC
8
V
V
4
2.54V
Reference
Input V
V
Hys2
S2
1
7
2
3
–
+
2.8V
Gnd
+
+
R
4
–V
+
–
S1
V
V
6
5
1
2
V
R
3
Input –V
+
+
Hys1
S1
1.27V
–
+
0.6V
Output
Voltage
Pins 5, 6
V
CC
R2
LED ‘ON’
+
–
V
S2
3
Gnd
R
1
1.27V
4
The above figure shows the MC34161 configured as a positive and negative overvoltage detector. As the input voltage increases from ground, the LED will turn ‘ON’
when either –V exceeds V , or V exceeds V . With the dashed line output connection, the circuit becomes a positive and negative undervoltage detector. As the
S1
2
S2
4
input voltage decreases from the peak towards ground, the LED will turn ‘ON’ when either V falls below V , or –V falls below V .
S2 S1
3
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
(V
(V
V
)
th1
R
3
R
R
R
R
V
4
3
4
1
2
1
2
1
V
V
(V
(V
V
V
)
V
V
V
(V
V
V
)
1
1
1
2
th1
th1
ref
th1
3
4
th2
H2
V
)
R
V
th1
ref
4
th2
R
R
(V
V
V
)
H1
R
R
R
R
R
R
V
3
3
4
2
th1
3
4
2
2
1
V
)
V
V
1
1
(V
V
V
)
H1
ref
th1
H1
th2
V
V
th1
H1
ref
1
th2
H2
Figure 22. Positive and Negative Undervoltage Detector
V
CC
8
V
V
2
1
2.54V
Reference
V
Input V
Hys1
S1
1
7
–
+
2.8V
Gnd
+
+
R
4
V
3
+
–
6
5
Input –V
V
2
V
S2
+
+
S1
Hys2
R
3
1.27V
V
–
+
0.6V
4
R
2
V
Output
Voltage
Pins 5, 6
CC
+
–
LED ‘ON’
3
R
1
1.27V
Gnd
–V
S2
4
The above figure shows the MC34161 configured as a positive and negative undervoltage detector. As the input voltage decreases toward ground, the LED will turn
‘ON’when either V falls below V , or –V falls below V . With the dashed line output connection, the circuit becomes a positive and negative overvoltage detector.
S1
1
S2
3
As the input voltage increases from the ground, the LED will turn ‘ON’ when either V exceeds V , or –V exceeds V .
S1 S1
2
1
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
R
R
V
R
R
V
V
V
th2
4
3
1
2
4
3
2
1
2
4
H2
V
V
(V
V
)
1
V
V
(V
(V
V
V
)
V
1
1
2
th1
H1
3
4
th
th
ref
th2
)
V
V
V
V
V
V
th1
th2
H2
ref
R
R
R
R
R
R
V
R
R
V
V
th2
V
4
1
2
4
3
1
1
2
3
V
1
V
V
V
H2
1
th1
H2
ref
th2
V
3
th1
H1
th2
ref
10
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 23. Overvoltage Detector with Audio Alarm
V
CC
8
R
A
2.54V
Reference
V
V
2
Piezo
1
7
2
V
Input V
Output
Hys
V
S
S
–
+
2.8V
1
R
+
+
2
+
–
Gnd
6
5
+
+
R
1
V
1.27V
CC
–
+
0.6V
Voltage
Pins 5, 6
Osc ‘ON’
Gnd
+
–
3
1.27V
4
R
C
B
T
The above figure shows the MC34161 configured as an overvoltage detector with an audio alarm. Channel 1 monitors input voltage V while channel 2 is connected
S
as a simple RC oscillator. As the input voltage increases from ground, the output of channel 1 allows the oscillator to turn ‘ON’ when V exceeds V .
S
2
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
R
R
V
R
R
V
V
2
1
2
1
2
1
1
2
1
2
V
(V
V )
1
V
V
th
1
1
1
1
th
H
2
V
V
H
th
th
Figure 24. Microprocessor Reset with Time Delay
V
8
CC
2.54V
Reference
1
V
V
2
1
Input V
Output
V
S
Hys
R
3
–
7
+
2.8V
+
+
Gnd
+
–
6
5
2
V
+
+
S
V
CC
1.27V
Voltage
Pin 5
–
+
R
DLY
Gnd
R
2
0.6V
+
–
t
DLY
3
R
Output
Voltage
Pin 6
V
1
CC
1.27V
Reset LED ‘ON’
Gnd
4
C
DLY
The above figure shows the MC34161 configured as a microprocessor reset with a time delay. Channel 2 monitors input voltage V while channel 1 performs the time
S
delayfunction.Astheinputvoltagedecreasestowardsground,theoutputofchannel2quicklydischargesC
whenV fallsbelowV .Astheinputvoltageincreases
DLY
S 1
from ground, the output of channel 2 allows R
to charge C when V exceeds V .
DLY S 2
DLY
For known resistor values, the voltage trip points are:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
R
R
V
R
R
V
V
2
1
2
1
2
1
1
2
1
2
V
(V
V )
H
1
V
V
th
1
1
1
1
th
2
V
V
H
th
th
1
V
For known R
C
values, the reset time delay is:
t
DLY
= R
C
In
DLY DLY
DLY DLY
th
1 –
V
CC
11
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 25. Automatic AC Line Voltage Selector
B+
+
+
220
250V
75k
75k
MAC
228A6FP
MR506
T
Input
92 Vac to
276 Vac
8
220
250V
10k
3.0A
2.54V
RTN
Reference
1.2k
1
10k
–
+
7
2
+
+
2.8V
+
–
6
5
+
+
1.27V
100k
–
+
0.6V
1.6M
+
–
3
1.27V
+
10
+
1N
4742
47
4
10k
3W
The above circuit shows the MC34161 configured as an automatic line voltage selector. The IC controls the triac, enabling the circuit to function
as a fullwave voltage doubler or a fullwave bridge. Channel 1 senses the negative half cycles of the AC line voltage. If the line voltage is less
than150 V, the circuit will switch from bridge mode to voltage doubling mode after a preset time delay. The delay is controlled by the 100 kΩ resistor
and the 10 µF capacitor. If the line voltage is greater than 150 V, the circuit will immediately return to fullwave bridge mode.
12
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Figure 26. Step–Down Converter
470µH
MPS750
V
V
in
12V
O
+
5.0V/250mA
+
8
330
1000
1N5819
470
2.54V
Reference
1.8k
0.01
1
7
2
–
+
+
+
0.01
4.7k
1.6k
2.8V
+
–
6
+
+
1.27V
–
+
0.6V
+
–
5
3
1.27V
47k
4
0.005
Test
Conditions
= 9.5 V to 24 V, I = 250 mA
Results
Line Regulation
V
in
V
in
V
in
V
in
40 mV = ±0.1%
2.0 mV = ±0.2%
50 mVpp
O
Load Regulation
Output Ripple
Efficiency
= 12 V, I = 0.25 mA to 250 mA
O
= 12 V, I = 250 mA
O
= 12 V, I = 250 mA
87.8%
O
The above figure shows the MC34161 configured as a step–down converter. Channel 1 monitors the output voltage while Channel 2
performs the oscillator function. Upon initial power–up, the converters output voltage will be below nominal, and the output of Channel
1 will allow the oscillator to run. The external switch transistor will eventually pump–up the output capacitor until its voltage exceeds the
input threshold of Channel 1. The output of Channel 1 will then switch low and disable the oscillator. The oscillator will commence
operation when the output voltage falls below the lower threshold of Channel 1.
13
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
OUTLINE DIMENSIONS
P SUFFIX
PLASTIC PACKAGE
CASE 626–05
ISSUE K
8
5
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
–B–
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
1
4
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
F
MILLIMETERS
INCHES
–A–
NOTE 2
DIM
A
B
C
D
F
MIN
9.40
6.10
3.94
0.38
1.02
MAX
10.16
6.60
4.45
0.51
1.78
MIN
MAX
0.400
0.260
0.175
0.020
0.070
L
0.370
0.240
0.155
0.015
0.040
C
G
H
J
K
L
2.54 BSC
0.100 BSC
0.76
0.20
2.92
1.27
0.30
3.43
0.030
0.008
0.115
0.050
0.012
0.135
J
–T–
SEATING
PLANE
N
7.62 BSC
0.300 BSC
M
M
N
–––
10
–––
10
D
K
0.76
1.01
0.030
0.040
G
H
M
M
M
0.13 (0.005)
T
A
B
D SUFFIX
PLASTIC PACKAGE
CASE 751–06
(SO–8)
ISSUE T
NOTES:
D
A
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
C
2. DIMENSIONS ARE IN MILLIMETER.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
8
1
5
M
M
0.25
B
H
E
4
h X 45
MILLIMETERS
B
e
DIM
A
A1
B
C
D
E
e
H
h
MIN
1.35
0.10
0.35
0.19
4.80
3.80
MAX
1.75
0.25
0.49
0.25
5.00
4.00
A
C
SEATING
PLANE
L
1.27 BSC
0.10
5.80
0.25
0.40
0
6.20
0.50
1.25
7
A1
B
L
M
S
S
0.25
C
B
A
14
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arisingoutof,directlyorindirectly,anyclaimofpersonalinjuryordeathassociatedwithsuchunintendedorunauthorizeduse,evenifsuchclaimallegesthatMotorola
was negligent regarding the design or manufacture of the part. Motorola and
Opportunity/Affirmative Action Employer.
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
15
MOTOROLA ANALOG IC DEVICE DATA
MC34161 MC33161
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