MC34064
MC33064
SEMICONDUCTOR
TECHNICAL DATA
UNDERVOLTAGE
SENSING CIRCUIT
ORDERING INFORMATION
Order this document by MC34064/D
Device
Operating
Temperature Range
Package
MC34064D5
TA = 0
to +70
C
TA = 40
to +85
C
SO8
MC34064P5
TO226AA
MC33064DM5
Micro8
MC33064P5
TO226AA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO226AA)
1
2
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO8)
3
Pin 1. Reset
2. Input
3. Ground
8
1
(Top View)
3
1
N.C.
Ground
N.C.
N.C.
2
4
8
7
6
5
N.C.
N.C.
Input
Reset
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro8)
8
1
MC34064DM5
Micro8
MC33064D5
SO8
1
MOTOROLA ANALOG IC DEVICE DATA
Undervoltage Sensing Circuit
The MC34064 is an undervoltage sensing circuit specifically designed for
use as a reset controller in microprocessor-based systems. It offers the
designer an economical solution for low voltage detection with a single
external resistor. The MC34064 features a trimmed-in-package bandgap
reference, and a comparator with precise thresholds and built-in hysteresis
to prevent erratic reset operation. The open collector reset output is capable
of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V
input with low standby current. These devices are packaged in 3-pin
TO-226AA, 8-pin SO8 and Micro8 surface mount packages.
Applications include direct monitoring of the 5.0 V MPU/logic power
supply used in appliance, automotive, consumer and industrial equipment.
Trimmed-In-Package Temperature Compensated Reference
Comparator Threshold of 4.6 V at 25
C
Precise Comparator Thresholds Guaranteed Over Temperature
Comparator Hysteresis Prevents Erratic Reset
Reset Output Capable of Sinking in Excess of 10 mA
Internal Clamp Diode for Discharging Delay Capacitor
Guaranteed Reset Operation with 1.0 V Input
Low Standby Current
Economical TO226AA, SO8 and Micro8 Surface Mount Packages
Representative Block Diagram
1.2 Vref
2 (2)
1 (1)
3 (4)
Reset
Gnd
Input
=
Sink Only
Positive True Logic
Pin numbers adjacent to terminals are for the 3pin TO226AA package.
Pin numbers in parenthesis are for the 8lead packages.
This device contains 21 active transistors.
Motorola, Inc. 1996
Rev 2
MC34064 MC33064
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Input Supply Voltage
Vin
1.0 to 10
V
Reset Output Voltage
VO
10
V
Reset Output Sink Current (Note 1)
ISink
Internally
Limited
mA
Clamp Diode Forward Current, Pin 1 to 2 (Note 1)
IF
100
mA
Power Dissipation and Thermal Characteristics
P Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25
C
Thermal Resistance, JunctiontoAir
D Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25
C
Thermal Resistance, JunctiontoAir
DM Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25
C
Thermal Resistance, JunctiontoAir
PD
R
JA
PD
R
JA
PD
R
JA
625
200
625
200
520
240
mW
C/W
mW
C/W
mW
C/W
Operating Junction Temperature
TJ
+150
C
Operating Ambient Temperature
MC34064
MC33064
TA
0 to +70
40 to +85
C
Storage Temperature Range
Tstg
65 to +150
C
NOTE:
ESD data available upon request.
ELECTRICAL CHARACTERISTICS
(For typical values TA = 25
C, for min/max values TA is the operating ambient temperature range
that applies [Notes 2 and 3] unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis
VIH
VIL
VH
4.5
4.5
0.01
4.61
4.59
0.02
4.7
4.7
0.05
V
RESET OUTPUT
Output Sink Saturation
(Vin = 4.0 V, ISink = 8.0 mA)
(Vin = 4.0 V, ISink = 2.0 mA)
(Vin = 1.0 V, ISink = 0.1 mA)
VOL
0.46
0.15
1.0
0.4
0.1
V
Output Sink Current (Vin, Reset = 4.0 V)
ISink
10
27
60
mA
Output Off-State Leakage (Vin, Reset = 5.0 V)
IOH
0.02
0.5
A
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 10 mA)
VF
0.6
0.9
1.2
V
TOTAL DEVICE
Operating Input Voltage Range
Vin
1.0 to 6.5
V
Quiescent Input Current (Vin = 5.0 V)
Iin
390
500
A
NOTES: 1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. Tlow =
0
C for MC34064
Thigh = +70
C for MC34064
40
C for MC33064
+85
C for MC33064
MC34064 MC33064
3
MOTOROLA ANALOG IC DEVICE DATA
V
O
, OUTPUT
VOL
T
AGE
(V)
V
O
, OUTPUT
VOL
T
AGE
(V)
Figure 1. Reset Output Voltage versus
Input Voltage
Figure 2. Reset Output Voltage versus
Input Voltage
Figure 3. Comparator Threshold Voltage
versus Temperature
Figure 4. Input Current versus Input Voltage
Figure 5. Reset Output Saturation versus
Sink Current
Figure 6. Reset Delay Time
Vin, INPUT VOLTAGE (V)
1
0
8.0
6.0
4.0
2.0
0
0
2.0
4.0
6.0
8.0
1
0
RL = 10 k to Vin
TA = 25
C
Vin, INPUT VOLTAGE (V)
5.0
4.0
3.0
2.0
1.0
0
4.56
0
4.58
0
4.60
0
4.62
0
4.64
0
RL = 10 k to Vin
TA = 25
C
TA, AMBIENT TEMPERATURE (
C)
th
, THRESHOLD
VOL
T
AGE (V)
4.630
4.620
4.610
4.600
4.590
4.580
4.570
55
25
0
25
50
75
100
125
V
RL = 10 k to Vin
Upper Threshold
High State Output
Lower Threshold
Low State Output
Vin, INPUT VOLTAGE (V)
in
, INPUT
CURRENT
(mA)
1.0
0.8
0.6
0.4
0.2
0
0
2.0
4.0
6.0
8.0
10
I
TA = +25
C
40
C
TA = +25
C
+85
C
40
C
V
OL
, OUTPUT
SA
TURA
TION
(V)
ISink, SINK CURRENT (mA)
2.0
1.5
1.0
0.5
0
0
10
20
30
40
Vin = 4.0 V
TA = 85
C
TA = 25
C
TA = 40
C
90%
5.0 V
4.0 V
10%
+85
C
Reset
Vin
5.0V
4.0V
REF
10k
200 ns/DIV
Reset
Vin
Vin = 5.0 V to 4.0 V
RL = 10 k
TA = 25
C
Figure 7. Clamp Diode Forward Current
versus Voltage
Figure 8. Low Voltage Microprocessor Reset
Figure 9. Low Voltage Microprocessor Reset with Additional Hysteresis
80
60
40
20
0
0
0.4
0.8
1.2
1.6
VF , FORWARD VOLTAGE (V)
, FOR
W
ARD
CURRENT
(mA)
FI
Vin = 0 V
TA = 25
C
A time delayed reset can be accomplished with the
addition of CDLY. For systems with extremely fast
power supply rise times (<500 ns) it is recommended
that the RCDLY time constant be greater than 5.0
s.
Vth(MPU) is the microprocessor reset input threshold.
tDLY = RCDLY In
1
1
Vth(MPU)
Power
Supply
+
2 (2)
R
1 (1)
Reset
CDLY
Microprocessor
Circuit
1.2 Vref
3 (4)
+
Power
Supply
+
2 (2)
RL
1 (1)
Reset
Microprocessor
Circuit
1.2Vref
3 (4)
+
VH
4.6 RH
+ 0.02
Vth(lower)
340 RH x 106
Where: RH
150
Where:
RL
1.5
,
10 k
Comparator hysteresis can be increased with the addition of resistor RH. The hysteresis equation has been
simplified and does not account for the change of input current Iin as VCC crosses the comparator threshold
(Figure 4). An increase of the lower threshold
Vth(lower) will be observed due to Iin which is typically 340
A at
4.59 V. The equations are accurate to
10% with RH less than 150
and RL between 1.5 k
and 10 k
.
Iin
RH
Vin
RL
MC34064 MC33064
4
MOTOROLA ANALOG IC DEVICE DATA
Test Data
VH
(mV)
Vth
(mV)
RH
(
)
RL
(k
)
20
0
0
0
51
3.4
10
1.5
40
6.8
20
4.7
81
6.8
20
1.5
71
10
30
2.7
112
10
30
1.5
100
16
47
2.7
164
16
47
1.5
190
34
100
2.7
327
34
100
1.5
276
51
150
2.7
480
51
150
1.5
Figure 10. Voltage Monitor
Figure 11. Solar Powered Battery Charger
Figure 12. Low Power Switching Regulator
Figure 13. MOSFET Low Voltage Gate Drive Protection
Overheating of the logic level power MOSFET due to insufficient gate voltage can be prevented with the above
circuit. When the input signal is below the 4.6 V threshold of the MC34064, its output grounds the gate of the L2
MOSFET.
270
4.6V
VCC
RL
MTP3055EL
2 (2)
1 (1)
3 (4)
+
1.2Vref
2 (2)
1 (1)
3 (4)
+
1.2Vref
Power
Supply
+
1.0k
2 (2)
1 (1)
3 (4)
+
1.2Vref
+
Solar
Cells
2 (2)
1 (1)
3 (4)
+
1.2Vref
Vin = 11.5
to 14.5V
470
+
MPSW51A
25
H
VO = 5.0 V
IO = 50 mA
470
+
680
22
+
1N5819
1.2k
330
1N756
4.7k
MC34064 MC33064
5
MOTOROLA ANALOG IC DEVICE DATA
Test
Conditions
Results
Line Regulation
Vin = 11.5 V to 14.5 V, IO = 50 mA
35 mV
Load Regulation
Vin = 12.6 V, IO = 0 mA to 50 mA
12 mV
Output Ripple
Vin = 12.6 V, IO = 50 mA
60 mVpp
Efficiency
Vin = 12.6 V, IO = 50 mA
77%
MC34064 MC33064
6
MOTOROLA ANALOG IC DEVICE DATA
P SUFFIX
PLASTIC PACKAGE
CASE 2904
(TO226AA)
ISSUE AD
D SUFFIX
PLASTIC PACKAGE
CASE 75105
(SO8)
ISSUE P
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.
R
A
P
J
L
F
B
K
G
H
SECTION XX
C
V
D
N
N
X X
SEATING
PLANE
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.175
0.205
4.45
5.20
B
0.170
0.210
4.32
5.33
C
0.125
0.165
3.18
4.19
D
0.016
0.022
0.41
0.55
F
0.016
0.019
0.41
0.48
G
0.045
0.055
1.15
1.39
H
0.095
0.105
2.42
2.66
J
0.015
0.020
0.39
0.50
K
0.500
12.70
L
0.250
6.35
N
0.080
0.105
2.04
2.66
P
0.100
2.54
R
0.115
2.93
V
0.135
3.43
1
SEATING
PLANE
1
4
5
8
C
K
4X
P
A
0.25 (0.010)
M
T B
S
S
0.25 (0.010)
M
B
M
8X
D
R
M
J
X 45
_
_
F
A
B
T
DIM
MIN
MAX
MILLIMETERS
A
4.80
5.00
B
3.80
4.00
C
1.35
1.75
D
0.35
0.49
F
0.40
1.25
G
1.27 BSC
J
0.18
0.25
K
0.10
0.25
M
0
7
P
5.80
6.20
R
0.25
0.50
_
_
G
NOTES:
1. DIMENSIONS A AND B ARE DATUMS AND T IS A
DATUM SURFACE.
2. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
3. DIMENSIONS ARE IN MILLIMETER.
4. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
5. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
6. DIMENSION D DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE D DIMENSION AT MAXIMUM MATERIAL
CONDITION.
OUTLINE DIMENSIONS
MC34064 MC33064
7
MOTOROLA ANALOG IC DEVICE DATA
DM SUFFIX
PLASTIC PACKAGE
CASE 846A02
(Micro8)
ISSUE B
S
B
M
0.08 (0.003)
A
S
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
2.90
3.10
0.114
0.122
B
2.90
3.10
0.114
0.122
C
1.10
0.043
D
0.25
0.40
0.010
0.016
G
0.65 BSC
0.026 BSC
H
0.05
0.15
0.002
0.006
J
0.13
0.23
0.005
0.009
K
4.75
5.05
0.187
0.199
L
0.40
0.70
0.016
0.028
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT
EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION D DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.25 (0.010)
PER SIDE.
B
A
D
K
G
PIN 1 ID
8 PL
0.038 (0.0015)
T
SEATING
PLANE
C
H
J
L
OUTLINE DIMENSIONS
MC34064 MC33064
8
MOTOROLA ANALOG IC DEVICE DATA
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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
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
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MC34064/D
*MC34064/D*
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