

SEMICONDUCTOR
TECHNICAL DATA
MICROPOWER
UNDERVOLTAGE
SENSING CIRCUITS
Order this document by MC34164/D
MC34164D–3
Device Operating
Temperature Range Package
ORDERING INFORMATION
TA = 0° to +70°C
SO–8
TA = –40° to +125°C
MC34164D–5
MC34164DM–3
MC34164DM–5
MC33164D–3
MC33164D–5
MC33164DM–3
MC33164DM–5
Micro–8
SO–8
Micro–8
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–226AA)
12
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
3
Pin 1. Reset
2. Input
3. Ground
8
1
(Top View)
3
1N.C.
Ground
N.C.
N.C.
2
4
8
7
6
5N.C.
N.C.
Input
Reset
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
8
1
MC34164P–3
MC34164P–5 TO–226AA
MC33164P–3
MC33164P–5 TO–226AA
1
MOTOROLA ANALOG IC DEVICE DATA
  
 
The MC34164 series are undervoltage sensing circuits specifically
designed for use as reset controllers in portable microprocessor based
systems where extended battery life is required. These devices offer the
designer an economical solution for low voltage detection with a single
external resistor. The MC34164 series features a bandgap reference, a
comparator with precise thresholds and built–in hysteresis to prevent erratic
reset operation, an open collector reset output capable of sinking in excess
of 6.0 mA, and guaranteed operation down to 1.0 V input with extremely low
standby current. These devices are packaged in 3–pin TO–226AA, 8–pin
SO–8 and Micro–8 surface mount packages.
Applications include direct monitoring of the 3.0 or 5.0 V MPU/logic power
supply used in appliance, automotive, consumer, and industrial equipment.
•Temperature Compensated Reference
•Monitors 3.0 V (MC34164–3) or 5.0 V (MC34164–5) Power Supplies
•Precise Comparator Thresholds Guaranteed Over Temperature
•Comparator Hysteresis Prevents Erratic Reset
•Reset Output Capable of Sinking in Excess of 6.0 mA
•Internal Clamp Diode for Discharging Delay Capacitor
•Guaranteed Reset Operation With 1.0 V Input
•Extremely Low Standby Current: As Low as 9.0 µA
•Economical TO–226AA, SO–8 and Micro–8 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 3–pin TO–226AA package.
Pin numbers in parenthesis are for the 8–lead packages.
This device contains 28 active transistors.
Motorola, Inc. 1996 Rev 1
MC34164 MC33164
2MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Input Supply Voltage Vin –1.0 to 12 V
Reset Output Voltage VO–1.0 to 12 V
Reset Output Sink Current ISink Internally
Limited mA
Clamp Diode Forward Current, Pin 1 to 2 (Note 1) IF100 mA
Power Dissipation and Thermal Characteristics
P Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
D Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
DM Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
PD
RθJA
PD
RθJA
PD
RθJA
700
178
700
178
520
240
mW
°C/W
mW
°C/W
mW
°C/W
Operating Junction Temperature TJ+150 °C
Operating Ambient Temperature Range
MC34164 Series
MC33164 Series
TA0 to +70
– 40 to + 85
°C
Storage Temperature Range Tstg – 65 to +150 °C
NOTE: ESD data available upon request.
MC34164–3, MC33164–3 SERIES
ELECTRICAL CHARACTERISTICS (For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range
that applies [Notes 2 & 3], unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis (ISink = 100 µA)
VIH
VIL
VH
2.55
2.55
0.03
2.71
2.65
0.06
2.80
2.80
–
V
RESET OUTPUT
Output Sink Saturation
(Vin = 2.4 V, ISink = 1.0 mA)
(Vin = 1.0 V, ISink = 0.25 mA)
VOL –
–0.14
0.1 0.4
0.3
V
Output Sink Current (Vin, Reset = 2.4 V) ISink 6.0 12 30 mA
Output Off–State Leakage
(Vin, Reset = 3.0 V)
(Vin, Reset = 10 V)
IR(leak) –
–0.02
0.02 0.5
1.0
µA
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 5.0 mA) VF6.0 0.9 1.2 V
TOTAL DEVICE
Operating Input Voltage Range Vin 1.0 to 10 – – V
Quiescent Input Current
Vin = 3.0 V
Vin = 6.0 V
Iin –
–9.0
24 15
40
µA
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 MC34164 Thigh =+70°C for MC34164
3.Tlow = –40°C for MC33164 Thigh =+85°C for MC33164
MC34164 MC33164
3
MOTOROLA ANALOG IC DEVICE DATA
MC34164–5, MC33164–5 SERIES
ELECTRICAL CHARACTERISTICS (For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range
that applies [Notes 2 & 3], unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis (ISink = 100 µA)
VIH
VIL
VH
4.15
4.15
0.02
4.33
4.27
0.09
4.45
4.45
–
V
RESET OUTPUT
Output Sink Saturation
(Vin = 4.0 V, ISink = 1.0 mA)
(Vin = 1.0 V, ISink = 0.25 mA)
VOL –
–0.14
0.1 0.4
0.3
V
Output Sink Current (Vin, Reset = 4.0 V) ISink 7.0 20 50 mA
Output Off–State Leakage
(Vin, Reset = 5.0 V)
(Vin, Reset = 10 V)
IR(leak) –
–0.02
0.02 0.5
2.0
µA
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 5.0 mA) VF0.6 0.9 1.2 V
TOTAL DEVICE
Operating Input Voltage Range Vin 1.0 to 10 – – V
Quiescent Input Current
Vin = 5.0 V
Vin = 10 V
Iin –
–12
32 20
50
µA
NOTES: 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 MC34164 Thigh =+70°C for MC34164
3.Tlow = –40°C for MC33164 Thigh =+85°C for MC33164
0Vin, INPUT VOLTAGE (V)
RL = 82 k to Vin
TA = 25
°
C
2.0 4.0 6.0 8.0 10
VO, OUTPUT VOLTAGE (V)
Figure 1. MC3X164–3 Reset Output
Voltage versus Input Voltage
0Vin, INPUT VOLTAGE (V)
Figure 2. MC3X164–5 Reset Output
Voltage versus Input Voltage
RL = 82 k to Vin
TA = 25
°
C
2.0 4.0 6.0 8.0 10
VO, OUTPUT VOLTAGE (V)
10
8.0
6.0
4.0
2.0
0
10
8.0
6.0
4.0
2.0
0
MC34164 MC33164
4MOTOROLA ANALOG IC DEVICE DATA
Iin, INPUT CURRENT ( A)
µ
Vin, THRESHOLD VOLT AGE (V)
VO, OUTPUT VOLTAGE (V)
Figure 3. MC3X164–3 Reset Output
Voltage versus Input Voltage
–50 T
A
, AMBIENT TEMPERATURE (
°
C)
– 25 0 25 50 75 100 125
Vin, THRESHOLD VOLT AGE (V)
Upper Threshold
High State Output
Lower Threshold
Low State Output
Figure 4. MC3X164–5 Reset Output
Voltage versus Input Voltage
4.22 Vin, INPUT VOLTAGE (V)
4.26 4.30 4.34 4.3
8
Figure 5. MC3X164–3 Comparator Threshold
Voltage versus Temperature Figure 6. MC3X164–5 Comparator Threshold
Voltage versus Temperature
Figure 7. MC3X164–3 Input Current
versus Input Voltage
VO, OUTPUT VOLTAGE (V)
Figure 8. MC3X164–5 Input Current
versus Input Voltage
2.62 Vin, INPUT VOLTAGE (V)
RL = 82 k to Vin
TA = 25
°
C
2.66 2.70 2.74 2.78
–50 T
A
, AMBIENT TEMPERATURE (
°
C)
– 25 0 25 50 75 100 125
Upper Threshold
High State Output
Lower Threshold
Low State Output
Vin, INPUT VOLTAGE (V)
2.0 4.0 6.0 8.0 10
TA = 0
°
CTA = 70
°
C
Iin, INPUT CURRENT ( A)
µ
0Vin, INPUT VOLTAGE (V)
2.0 4.0 6.0 8.0 10
RL = 82 k to Vin
TA = 25
°
C
4.36
4.32
4.28
4.24
4.20
5.0
4.0
3.0
2.0
1.0
0
5.0
4.0
3.0
2.0
1.0
0
2.76
2.72
2.68
2.64
2.60
50
40
30
20
10
00
50
40
30
20
10
0
TA = 25
°
C
TA = 0
°
CTA = 70
°
C
TA = 25
°
C
MC34164 MC33164
5
MOTOROLA ANALOG IC DEVICE DATA
TA = 0
°
C
VOL, OUTPUT SATURATION (V)
0ISink, SINK CURRENT (mA)
4.0 8.0 12 16 20
TA = 70
°
C
TA = 0
°
C
Vin, Reset = 4 V
Figure 9. MC3X164–3 Reset Output
Saturation versus Sink Current Figure 10. MC3X164–5 Reset Output
Saturation versus Sink Current
Figure 11. Clamp Diode Forward Current
versus Voltage
VOL, OUTPUT SATURATION (V)
Figure 12. Reset Delay Time
(MC3X164–5 Shown)
0VSink, SINK CURRENT (mA)
4.0 8.0 12 16
, FORWARD VOLTAGE (V)
0.4 0.8 1.2 1.6
IF, FORWARD CURRENT (mA)
20
TA = 25
°
C
Figure 13. Low Voltage Microprocessor Reset
Power
Supply
1.2 Vref
Microprocessor
Circuit
2 (2) R
1 (1)
3 (4)
Reset
CDLY
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
µ
s. Vth(MPU) is
the microprocessor reset input threshold.
tDLY = RCDLY In
1 –
Vth(MPU)
1
Vin
ǒǓ
T
A
= 25
°
C
TA = 0
°
C
TA = 70
°
C
TA = 25
°
C
Vin = 0 V
TA = 25
°
C
VF
Vin = 2.4 V
TA = 70
°
C
TA = 0
°
C
TA = 25
°
C
Reset
Vin
Vin = 5.0 V to 4.0 V
RL = 43 k
TA = 25
°
C
Reset
Vin
5.0V
4.0V
Ref
43k
90%
5.0 V
4.0 V
5.0
µ
s/DIV
10
%
4.0
3.0
2.0
1.0
0
4.0
3.0
2.0
1.0
0
32
24
16
8.0
00
TA = 70
°
C
MC34164 MC33164
6MOTOROLA ANALOG IC DEVICE DATA
Figure 14. Low Voltage Microprocessor Reset With Additional Hysteresis
(MC3X164–5 Shown)
Power
Supply
1.2 Vref
Microprocessor
Circuit
2 (2) RL
1 (1)
3 (4)
Reset
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 Vin crosses the comparator threshold (Figure 8). An increase of the lower threshold
∆
Vth(lower) will be observed due to Iin which is typically 10
µ
A at 4.3 V. The
equations are accurate to
±
10% with RH less than 1.0 k
Ω
and RL between 4.3 k
Ω
and 43 k
Ω
.
VH
≈4.3 RH
RH
MC3X164–5
Iin Vin
Test Data
VH
(mV) ∆Vth
(mV) RH
(Ω)RL
(kΩ)
60
103
123
160
155
199
280
262
306
357
421
530
0
1.0
1.0
1.0
2.2
2.2
2.2
4.7
4.7
4.7
4.7
4.7
0
100
100
100
220
220
220
470
470
470
470
470
43
10
6.8
4.3
10
6.8
4.3
10
8.2
6.8
5.6
4.3
RL
+ 0.06
∆
Vth(lower)
≈
10 RH x 10 –6
where: RH
≤
1.0 k
Ω
43 k
Ω ≥
RL
≥
4.3 k
Ω
Figure 15. Voltage Monitor Figure 16. Solar Powered Battery Charger
Figure 17. MOSFET Low Voltage Gate Drive Protection Using the MC3X164–5
1.2 Vref
2 (2)
270
1 (1)
3 (4)
Power
Supply
1.2 V ref
2 (2) 1.0 k
1 (1)
3 (4)
1.2 V ref
2 (2)
1 (1)
3 (4)
Solar
Cells
RL
MTP3055EL
MC3X164–5
VCC
4.3V
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 4.3 V threshold of the MC3X164–5, its
output grounds the gate of the L2 MOSFET.
MC34164 MC33164
7
MOTOROLA ANALOG IC DEVICE DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29–04
(TO–226AA)
ISSUE AD
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SO–8)
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 X–X
C
V
D
N
N
XX
SEATING
PLANE DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.175 0.205 4.45 5.20
B0.170 0.210 4.32 5.33
C0.125 0.165 3.18 4.19
D0.016 0.022 0.41 0.55
F0.016 0.019 0.41 0.48
G0.045 0.055 1.15 1.39
H0.095 0.105 2.42 2.66
J0.015 0.020 0.39 0.50
K0.500 ––– 12.70 –––
L0.250 ––– 6.35 –––
N0.080 0.105 2.04 2.66
P––– 0.100 ––– 2.54
R0.115 ––– 2.93 –––
V0.135 ––– 3.43 –––
1
SEATING
PLANE
14
58
C
K
4X P
A0.25 (0.010) MTBSS
0.25 (0.010) MBM
8X D
R
M
J
X 45
_
_
F
–A–
–B–
–T–
DIM MIN MAX
MILLIMETERS
A4.80 5.00
B3.80 4.00
C1.35 1.75
D0.35 0.49
F0.40 1.25
G1.27 BSC
J0.18 0.25
K0.10 0.25
M0 7
P5.80 6.20
R0.25 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
MC34164 MC33164
8MOTOROLA ANALOG IC DEVICE DATA
DM SUFFIX
PLASTIC PACKAGE
CASE 846A–02
(Micro–8)
ISSUE B
S
B
M
0.08 (0.003) A S
TDIM MIN MAX MIN MAX
INCHESMILLIMETERS
A2.90 3.10 0.114 0.122
B2.90 3.10 0.114 0.122
C––– 1.10 ––– 0.043
D0.25 0.40 0.010 0.016
G0.65 BSC 0.026 BSC
H0.05 0.15 0.002 0.006
J0.13 0.23 0.005 0.009
K4.75 5.05 0.187 0.199
L0.40 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
HJL
OUTLINE DIMENSIONS
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
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, 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
applications intended 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
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Af firmative Action Employer.
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MC34164/D
*MC34164/D*
◊