Order this document by MC34164/D
MC34164
MC33164
Micropower Undervoltage
Sensing Circuits
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
MICROPOWER
UNDERVOLTAGE
SENSING CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–226AA)
1
2
3
•
•
•
•
•
•
•
•
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
Pin 1. Reset
2. Input
3. Ground
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
8
1
Representative Block Diagram
Input
2 (2)
Reset
1 (1)
Reset 1
Input 2
N.C. 3
Ground 4
(Top View)
8 N.C.
7 N.C.
6 N.C.
5 N.C.
ORDERING INFORMATION
Device
1.2 Vref
MC34164D–3
MC34164D–5
MC34164DM–3
MC34164DM–5
MC34164P–3
MC34164P–5
MC33164D–3
MC33164D–5
MC33164DM–3
MC33164DM–5
MC33164P–3
MC33164P–5
©
Motorola, Inc. 1996
Operating
Temperature Range
Package
SO–8
TA = 0° to +70°C
Micro–8
TO–226AA
SO–8
Gnd
3 (4)
= 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.
TA = –40° to +125°C
Micro–8
TO–226AA
Rev 1
MOTOROLA ANALOG IC DEVICE DATA
1
MC34164 MC33164
MAXIMUM RATINGS
Rating
Power Input Supply Voltage
Reset Output Voltage
Reset Output Sink Current
Clamp Diode Forward Current, Pin 1 to 2 (Note 1)
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
Operating Junction Temperature
Operating Ambient Temperature Range
MC34164 Series
MC33164 Series
Storage Temperature Range
NOTE:
ESD data available upon request.
Symbol
Vin
VO
ISink
IF
Value
–1.0 to 12
–1.0 to 12
Internally
Limited
100
Unit
V
V
mA
mA
PD
R
θJA
PD
R
θJA
PD
R
θJA
TJ
TA
700
178
700
178
520
240
+150
0 to +70
– 40 to + 85
mW
°C/W
mW
°C/W
mW
°C/W
°C
°C
Tstg
– 65 to +150
°C
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
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis (ISink = 100
µA)
RESET OUTPUT
Output Sink Saturation
(Vin = 2.4 V, ISink = 1.0 mA)
(Vin = 1.0 V, ISink = 0.25 mA)
Output Sink Current (Vin, Reset = 2.4 V)
Output Off–State Leakage
(Vin, Reset = 3.0 V)
(Vin, Reset = 10 V)
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 5.0 mA)
TOTAL DEVICE
Operating Input Voltage Range
Quiescent Input Current
Vin = 3.0 V
Vin = 6.0 V
Vin
Iin
–
–
9.0
24
15
40
1.0 to 10
–
–
V
µA
VOL
–
–
ISink
IR(leak)
–
–
VF
6.0
0.02
0.02
0.9
0.5
1.0
1.2
V
6.0
0.14
0.1
12
0.4
0.3
30
mA
µA
V
V
VIH
VIL
VH
2.55
2.55
0.03
2.71
2.65
0.06
2.80
2.80
–
Symbol
Min
Typ
Max
Unit
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
2
MOTOROLA ANALOG IC DEVICE DATA
MC34164 MC33164
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
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis (ISink = 100
µA)
RESET OUTPUT
Output Sink Saturation
(Vin = 4.0 V, ISink = 1.0 mA)
(Vin = 1.0 V, ISink = 0.25 mA)
Output Sink Current (Vin, Reset = 4.0 V)
Output Off–State Leakage
(Vin, Reset = 5.0 V)
(Vin, Reset = 10 V)
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 5.0 mA)
TOTAL DEVICE
Operating Input Voltage Range
Quiescent Input Current
Vin = 5.0 V
Vin = 10 V
Vin
Iin
–
–
12
32
20
50
1.0 to 10
–
–
V
µA
VOL
–
–
ISink
IR(leak)
–
–
VF
0.6
0.02
0.02
0.9
0.5
2.0
1.2
V
7.0
0.14
0.1
20
0.4
0.3
50
mA
µA
V
V
VIH
VIL
VH
4.15
4.15
0.02
4.33
4.27
0.09
4.45
4.45
–
Symbol
Min
Typ
Max
Unit
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
Figure 1. MC3X164–3 Reset Output
Voltage versus Input Voltage
10
RL = 82 k to Vin
TA = 25°C
10
Figure 2. MC3X164–5 Reset Output
Voltage versus Input Voltage
VO , OUTPUT VOLTAGE (V)
VO , OUTPUT VOLTAGE (V)
8.0
6.0
4.0
2.0
0
0
8.0
6.0
4.0
2.0
0
RL = 82 k to Vin
TA = 25°C
2.0
4.0
6.0
8.0
10
0
2.0
4.0
6.0
8.0
10
Vin, INPUT VOLTAGE (V)
Vin, INPUT VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
3
MC34164 MC33164
Figure 3. MC3X164–3 Reset Output
Voltage versus Input Voltage
5.0
V O , OUTPUT VOLTAGE (V)
V O , OUTPUT VOLTAGE (V)
4.0
3.0
2.0
1.0
RL = 82 k to Vin
TA = 25°C
0
2.62
2.66
2.70
Vin, INPUT VOLTAGE (V)
2.74
2.78
0
4.22
4.26
5.0
4.0
3.0
2.0
1.0
RL = 82 k to Vin
TA = 25°C
4.30
Vin, INPUT VOLTAGE (V)
4.34
4.38
Figure 4. MC3X164–5 Reset Output
Voltage versus Input Voltage
Figure 5. MC3X164–3 Comparator Threshold
Voltage versus Temperature
2.76
V in , THRESHOLD VOLTAGE (V)
V in , THRESHOLD VOLTAGE (V)
Upper Threshold
High State Output
2.72
4.36
Figure 6. MC3X164–5 Comparator Threshold
Voltage versus Temperature
4.32
Upper Threshold
High State Output
2.68
4.28
2.64
Lower Threshold
Low State Output
4.24
Lower Threshold
Low State Output
2.60
– 50
– 25
0
25
50
75
100
125
4.20
– 50
– 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
TA, AMBIENT TEMPERATURE (°C)
Figure 7. MC3X164–3 Input Current
versus Input Voltage
50
40
30
20
10
0
TA = 0°C
TA = 70°C
TA = 25°C
50
40
30
20
10
0
Figure 8. MC3X164–5 Input Current
versus Input Voltage
I in, INPUT CURRENT (
µ
A)
I in, INPUT CURRENT (
µ
A)
TA = 25°C
TA = 0°C
TA = 70°C
0
2.0
4.0
6.0
8.0
10
0
2.0
4.0
6.0
8.0
10
Vin, INPUT VOLTAGE (V)
Vin, INPUT VOLTAGE (V)
4
MOTOROLA ANALOG IC DEVICE DATA
MC34164 MC33164
Figure 9. MC3X164–3 Reset Output
Saturation versus Sink Current
4.0
V OL, OUTPUT SATURATION (V)
V OL, OUTPUT SATURATION (V)
Vin = 2.4 V
3.0
TA = 70°C
TA = 25°C
2.0
TA = 25°C
TA = 0°C
TA = 70°C
0
0
4.0
8.0
12
16
20
VSink, SINK CURRENT (mA)
TA = 0°C
4.0
Vin, Reset = 4 V
3.0
TA = 25°C
TA = 25°C
TA = 70°C
TA = 0°C
Figure 10. MC3X164–5 Reset Output
Saturation versus Sink Current
2.0
1.0
1.0
TA = 0°C
TA = 70°C
0
0
4.0
8.0
12
16
20
ISink, SINK CURRENT (mA)
Figure 11. Clamp Diode Forward Current
versus Voltage
32
I F , FORWARD CURRENT (mA)
Figure 12. Reset Delay Time
(MC3X164–5 Shown)
Reset
Vin = 5.0 V to 4.0 V
RL = 43 k
TA = 25°C
24
Vin = 0 V
TA = 25°C
90%
Vin
5.0 V
4.0 V
Vin
43k
Reset
16
8.0
10
%
5.0V
4.0V
Ref
0
0
0.4
0.8
VF , FORWARD VOLTAGE (V)
1.2
1.6
5.0
µs/DIV
Figure 13. Low Voltage Microprocessor Reset
2 (2)
Power
Supply
1 (1)
R
Reset
CDLY
Microprocessor
Circuit
1.2 Vref
tDLY = RCDLY In
3 (4)
1–
1
Vth(MPU)
Vin
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
µs.
Vth(MPU) is
the microprocessor reset input threshold.
MOTOROLA ANALOG IC DEVICE DATA
5
