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MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
T
HE
I
NFINITE
P
OWER
OF
I
N N O VAT I O N
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION The MC33164-3 and MC34164-3 are undervoltage sensing circuits designed specifically for use as reset controllers in microprocessor-based systems. They offer the designer an economical, space efficient solution for low supply voltage detection when used in combination with a single pull-up resistor. Adding one capacitor offers the functionality of a programmable delay time after power returns. The MC33164-3 and MC34164-3 consist of a temperature stable reference comparator with hysteresis, high-current clamping diode and an open collector output stage capable of sinking more than 6mA over the full temperature range. The MC33164-3 and MC34164-3's RESET output is specified to be fully functional at VIN 1V. See Product Highlight below.
K E Y F E AT U R E S
s Monitors +3.3V Supplies (VT = 2.7V Typ) s Outputs Fully Defined At VIN 1V (See Product Highlight) s Ultra-Low Supply Current (13A Max.) ! Temperature Compensated ICC For Extremely Stable Current Consumption ! P Reset Delay Programmable With 1 External Resistor And Capacitor ! Comparator Hysteresis Prevents Output Oscillation (60mV Typ.) ! Electrically Compatible With Motorola MC34164-3 ! Pin-to-Pin Compatible With Motorola MC34064 / MC34164
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
RESET OUTPUT VS. INPUT VOLTAGE
10
APPLICATIONS
s All Microprocessor Or Microcontroller Designs Using 3V/3.3V Supplies
3
RESET Output Voltage - (V)
s Simple 3V/3.3V Undervoltage Detection
2
1
Undefined
0 0 1 2 3 10
Input Voltage - (V)
PA C K A G E O R D E R I N F O R M A T I O N TA (C) 0 to 70 -40 to 85
DM Plastic SOIC 8-pin
MC34164-3DM MC33164-3DM
LP Plastic TO-92 3-pin
MC34164-3LP MC33164-3LP
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. MC34164-3DMT)
Copyright (c) 1999 Rev. 1.2 6/99
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE PIN OUTS
RESET VIN N.C. GROUND 1 2 3 4 8 7 6 5 N.C. N.C. N.C. N.C.
Input Supply Voltage (VIN) ............................................................................... -1V to 12V RESET Output Voltage (VOUT) ..................................................................................... 12V Output Sink Current (IOL) ............................................................ Internally Limited (mA) Clamp Diode Forward Current (IF), Pin 1 to pin 2 ............................................... 100mA Operating Junction Temperature Plastic (DM, LP - Packages) .................................................................................. 150C Storage Temperature Range ...................................................................... -65C to 150C Lead Temperature (Soldering, 10 seconds) ............................................................. 300C
Note 1. Values beyond which damage may occur. All voltages are specified with respect to ground, and all currents are positive into the specified terminal.
DM PACKAGE (Top View)
3. GROUND
THERMAL DATA
DM PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA LP PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 156C/W 165C/W
2. VIN 1. RESET
LP PACKAGE (Top View)
Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow
BLOCK DIAGRAM
VIN
RESET
1.2 VREF
GROUND
2
Copyright (c) 1999 Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S Parameter
Input Supply Voltage RESET Output Voltage Clamp Diode Forward Current (Note 3) Operating Ambient Temperature Range: MC34164-3 MC33164-3 Note 2. Range over which the device is guaranteed functional. Note 3. Maximum junction temperature ratings must be observed.
(Note 2)
Symbol
VIN VOUT IF TA TA
Recommended Operating Conditions Min. Typ. Max.
1 -0.3 10 10 100 70 85
Units
V V mA C C
0 -40
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0C TA 70C for the MC34164-3 and -40C TA 85C for the MC33164-3. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter Comparator Section
Threshold Voltage High State Output Low State Output Hysteresis
Symbol
Test Conditions
MC33164-3 / 34164-3 Units Min. Typ. Max.
VT+ VTVH
VIN Increasing -- 2.4V to 3.5V VIN Decreasing -- 3.5V to 2.4V (IOL = 100A) VIN = 2.4V, IOL = 8.0mA VIN = 2.4V, IOL = 1.0mA VIN = 1.0V, IOL = 0.25mA VIN , RESET = 2.4V VIN , RESET = 3.0V VIN , RESET = 10V Pin 1 to pin 2, IF = 5mA VIN = 3.0V VIN = 6.0V
2.55 2.55 0.03
2.71 2.65 0.06 0.15 0.04 0.02 24 .02 .02 0.75 9 21
2.8 2.8
V V V V V V mA A A V A A
RESET Output Section
Output Low Level Saturation Voltage VOL Output Low Level Current Output Off-State Leakage Clamp Diode Forward Voltage IOL IOH VF ICC 1.0 0.4 0.3 40 0.5 1.0 1.0 13 30
6.0
0.6
Total Device
Supply Current
Copyright (c) 1999 Rev. 1.2 6/99
3
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
GRAPH / CURVE INDEX
FIGURE INDEX
Characteristic Curves
FIGURE # 1. 2. 3. 4. 5. 6. 7. 8. 9. INPUT VOLTAGE vs. RESET OUTPUT VOLTAGE POWER-UP RESET VOLTAGE POWER-DOWN RESET VOLTAGE RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE HYSTERESIS THRESHOLD VOLTAGE vs. TEMPERATURE THRESHOLD HYSTERESIS vs. TEMPERATURE SUPPLY CURRENT vs. INPUT VOLTAGE SUPPLY CURRENT vs. TEMPERATURE LOW LEVEL OUTPUT CURRENT vs TEMPERATURE FIGURE #
Application Circuits
16. LOW VOLTAGE MICROPROCESSOR RESET 17. SWITCHING THE LOAD OFF WHEN BATTERY REACHES BELOW 2.7V 18. VOLTAGE MONITOR 19. SOLAR POWERED BATTERY CHARGER
10. LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE 11. LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE 12. CLAMP DIODE FORWARD VOLTAGE vs. FORWARD CURRENT 13. PROPAGATION DELAY -- HIGH to LOW 14. PROPAGATION DELAY -- LOW to HIGH 15. MINIMUM OPERATING VOLTAGE OVER TEMPERATURE
4
Copyright (c) 1999 Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
CHARACTERISTIC
CURVES
FIGURE 1. -- INPUT VOLTAGE and RESET OUTPUT VOLTAGE vs. TIME
10
FIGURE 2. -- POWER-UP RESET VOLTAGE
2.0
RESET - (V)
7.5 5 2.5 0
RL = 82k
Power-Up RESET Voltage - (V)
TA = 25C
1.8 1.6 1.4 1.2 1.0
RL = 10kohms TA = 25C
VIN
0.8 0.6
10
VIN - (V)
7.5 5 2.5 0 0 .2 .4 .6 .8 1.0 1.2 1.4 1.6 1.8 2.0
RESET
0.4 0.2 0 0 0.4 0.8 1.2 1.6 2.0
(t) Time - (ms)
(t) Time - (ms)
FIGURE 3. -- POWER-DOWN RESET VOLTAGE
2.0 1.8
FIGURE 4. -- RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE
3.00
(VOUT) RESET Output Voltage - (V)
Power-Down RESET Voltage - (V)
RL = 10kohms TA = 25C
1.6 1.4 1.2 1.0
2.50
2.00
RL = 82kW TA = 25C
1.50
VIN
0.8 0.6 0.4
1.00
RESET
0.2 0 0 0.4 0.8 1.2 1.6 2.0
0.50
0 2.63 2.65 2.67 2.69 2.71 2.73
(t) Time - (ms)
(VIN) Input Voltage - (V)
Copyright (c) 1999 Rev. 1.2 6/99
5
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
CHARACTERISTIC
CURVES
FIGURE 5. -- THRESHOLD VOLTAGE vs. TEMPERATURE
2.800 2.775
FIGURE 6. -- THRESHOLD HYSTERESIS vs. TEMPERATURE
100 90
(VT) Threshold Voltage - (V)
2.750 2.725 2.700 2.675 2.650 2.625 2.600 2.575 2.550 -50
(VH) Threshold Hysteresis - (mV)
80 70 60 50 40 30 20 10 0 -50
VT+ High Threshold Voltage
VT- Low Threshold Voltage
-25
0
25
50
75
100
-25
0
25
50
75
100
(TA) Ambient Temperature - (C)
(TA) Ambient Temperature - (C)
FIGURE 7. -- SUPPLY CURRENT vs. INPUT VOLTAGE
200
FIGURE 8. -- SUPPLY CURRENT vs. TEMPERATURE
25.0
160
(IIN) Quiescent Input Current - (A)
180
RL = No Load TA = 25C
No Load
20.0
(IIN) Input Current - (A)
VIN = 6V
140 120 100 80 60 40 20 0 0 2 4 6 8 10
15.0
10.0
VIN = 3V
5.0
0.0 -50
-25
0
25
50
75
100
(VIN) Input Voltage - (V)
(TA) Ambient Temperature - (C)
6
Copyright (c) 1999 Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
CHARACTERISTIC
CURVES
FIGURE 9. -- LOW LEVEL OUTPUT CURRENT vs. TEMPERATURE
40
FIGURE 10. -- LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE
100
VIN = VOUT = 2.4V
(ISINK) Output Sink Current - (mA)
35 30 25 20 15 10 5 0 -50
(VOL) Output Sink Saturation - (mV)
90 80 70 60 50 40 30 20 10 0 -50
VIN = 2.4V IOUT = 1mA
-25
0
25
50
75
100
-25
0
25
50
75
100
(TA) Ambient Temperature - (C)
(TA) Ambient Temperature - (C)
FIGURE 11. -- LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE
50
FIGURE 12. -- CLAMP DIODE FORWARD VOLTAGE vs. FORWARD CURRENT
-1.6
(VF) Clamp Diode Forward Voltage - (V)
(VOL) Output Sink Saturation - (mV)
45 40 35 30 25 20 15 10 5 0 -50
VIN = 1V IOUT = 250A
-1.5 -1.4 -1.3 -1.2 -1.1 -1 25C -0.9 -0.8 85C -0.7 -0.6
-40C
-25
0
25
50
75
100
0
10
20
30
40
50
60
70
80
90 100
(TA) Ambient Temperature - (C)
(IF) Diode Forward Current - (mA)
Copyright (c) 1999 Rev. 1.2 6/99
7
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
CHARACTERISTIC
CURVES
FIGURE 13. -- PROPAGATION DELAY -- HIGH to LOW
VIN
FIGURE 14. -- PROPAGATION DELAY -- LOW to HIGH
5.5
TA = 25C
3.5V 2.4V
10K RESET
VIN - (V)
3.0
REF
VIN - (V)
4.0
TA = 25C
4.0 3.0
2.0
2.0
2.5
2.5
RESET - (V)
1.5 0.5 0 -0.5 0 .5 1 1.5 2 2.5 3 3.5 4 4.5 5
RESET - (V)
1.5 0.5 0 -0.5 0 2 4 6 8 10
VIN 3.5V 2.4V 10K RESET
REF
12
14
16
18
20
(t) Time - (s)
(t) Time - (s)
FIGURE 15. -- MINIMUM OPERATING VOLTAGE OVER TEMPERATURE
1.000
(VIN-MIN.) Minimum Operating Voltage - (V)
0.950 0.900 0.850 0.800 0.750 0.700 0.650 0.600 0.550 0.500 -50
VIN = Ramp Down IOUT = 250A
-25
0
25
50
75
100
(TA) Ambient Temperature - (C)
8
Copyright (c) 1999 Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3 V U N D E RV O LTA G E S E N S I N G C I R C U I T
P
RODUCTION
D
ATA
S
HEET
T Y P I C A L A P P L I C AT I O N C I R C U I T S FIGURE 16. -- LOW VOLTAGE MICROPROCESSOR RESET FIGURE 17. -- SWITCHING THE LOAD OFF WHEN BATTERY REACHES BELOW 2.7V
VIN Power Supply RESET CDLY
R Microprocessor Circuit
VIN RESET
Load
1.2 VREF
A time delayed reset can be accomplished with the addition of CDLY. For systems with extremely fast power supply rise times (< 500ns) it is recommended that the RCDLY time constant be greater than 5.0s. VTH(MPU) is the microprocessor reset input threshold.
1.2VREF
tDLY = R CDLY In
1 VTH(MPU) 1- V IN
FIGURE 18. -- VOLTAGE MONITOR
FIGURE 20. -- SOLAR POWERED BATTERY CHARGER
1.0k VIN Power Supply RESET
VIN RESET SOLAR CELLS
1.2VREF
1.2VREF
LED turns on when VIN < 2.7V indicating Power Supply is low.
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright (c) 1999 Rev. 1.2 6/99
9

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