MC33164-3/MC34164-3
0
3V U
T HE I NFINITE P OWER OF I NNOVATION
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
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
RESET OUTPUT VS. INPUT VOLTAGE
10
3
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 V
Highlight below.
≥ 1V. See Product
IN
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
KEY FEATURES
■ Monitors +3.3V Supplies
(VT = 2.7V Typ)
■ Outputs Fully Defined At V
Product Highlight)
■ Ultra-Low Supply Current (13µA Max.)
! Temperature Compensated ICC For
Extremely Stable Current Consumption
! µP 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
APPLICATIONS
■■
■ All Microprocessor Or Microcontroller
■■
Designs Using 3V/3.3V Supplies
■■
■ Simple 3V/3.3V Undervoltage Detection
■■
IN
≥≥
≥ 1V (See
≥≥
2
1
RESET Output Voltage - (V)
Undefined
0
0
1231
Input Voltage - (V)
-40 to 85 MC33164-3DM MC33164-3LP
Note: All surface-mount packages are available in Tape & Reel.
PACKAGE ORDER INFORMATION
T
(°C)
A
Plastic SOIC
DM
8-pin
Plastic TO-92
LP
3-pin
0 to 70 MC34164-3DM MC34164-3LP
Append the letter "T" to part number. (i.e. MC34164-3DMT)
Copyright © 1999
Rev. 1.2 6/99
L INF INITY 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
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN) ............................................................................... -1V to 12V
RESET Output Voltage (V
Output Sink Current (I
Clamp Diode Forward Current (IF), Pin 1 to pin 2............................................... 100mA
Operating Junction Temperature
Plastic (DM, LP - Packages) .................................................................................. 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
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:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
LP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow
) ..................................................................................... 12V
OUT
) ............................................................ Internally Limited (mA)
OL
THERMAL DATA
θθ
θ
θθ
JA
θθ
θ
θθ
JA
165°C/W
156°C/W
PACKAGE PIN OUTS
RESET
N.C.
GROUND
1 8
V
2 7
IN
3 6
4 5
DM PACKAGE
(Top View)
LP PACKAGE
(Top View)
N.C.
N.C.
N.C.
N.C.
3. GROUND
2. V
IN
1. RESET
V
IN
1.2 V
REF
GROUND
BLOCK DIAGRAM
RESET
2
Copyright © 1999
Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
RECOMMENDED OPERATING CONDITIONS (Note 2)
Parameter
Input Supply Voltage V
RESET Output Voltage V
Clamp Diode Forward Current (Note 3) I
Operating Ambient Temperature Range:
MC34164-3 T
MC33164-3 T
Note 2. Range over which the device is guaranteed functional.
Note 3. Maximum junction temperature ratings must be observed.
Symbol
IN
OUT
F
A
A
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0°C ≤ TA ≤ 70°C for the MC34164-3 and -40°C ≤ TA ≤
85°C for the MC33164-3.
Parameter
Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Symbol
Test Conditions Units
Comparator Section
Threshold Voltage
High State Output V
Low State Output V
Hysteresis VH(IOL = 100µA)
Increasing — 2.4V to 3.5V
T+VIN
VIN Decreasing — 3.5V to 2.4V
T-
RESET Output Section
Output Low Level Saturation Voltage VIN = 2.4V, IOL = 8.0mA
V
Output Low Level Current I
Output Off-State Leakage I
Clamp Diode Forward Voltage VFPin 1 to pin 2, IF = 5mA
OL
OH
= 2.4V, IOL = 1.0mA
OLVIN
VIN = 1.0V, IOL = 0.25mA
VIN , RESET = 2.4V
VIN , RESET = 3.0V
VIN , RESET = 10V
Total Device
Supply Current I
CC
VIN = 3.0V
VIN = 6.0V
Recommended Operating Conditions
Min. Typ. Max.
110V
-0.3 10 V
100 mA
070°C
-40 85 °C
Units
MC33164-3 / 34164-3
Min. Typ. Max.
2.55 2.71 2.8 V
2.55 2.65 2.8 V
0.03 0.06 V
0.15 1.0 V
0.04 0.4 V
0.02 0.3 V
6.0 24 40 mA
.02 0.5 µA
.02 1.0 µA
0.6 0.75 1.0 V
913µA
21 30 µA
Copyright © 1999
Rev. 1.2 6/99
3
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
GRAPH / CURVE INDEX
Characteristic Curves
FIGURE #
1. INPUT VOLTAGE vs. RESET OUTPUT VOLTAGE
2. POWER-UP RESET VOLTAGE
3. POWER-DOWN RESET VOLTAGE
4. RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE HYSTERESIS
5. THRESHOLD VOLTAGE vs. TEMPERATURE
6. THRESHOLD HYSTERESIS vs. TEMPERATURE
7. SUPPLY CURRENT vs. INPUT VOLTAGE
8. SUPPLY CURRENT vs. TEMPERATURE
9. LOW LEVEL OUTPUT CURRENT vs TEMPERATURE
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
FIGURE INDEX
Application Circuits
FIGURE #
16. LOW VOLTAGE MICROPROCESSOR RESET
17. SWITCHING THE LOAD OFF WHEN BATTERY REACHES BELOW 2.7V
18. VOLTAGE MONITOR
19. SOLAR POWERED BATTERY CHARGER
4
Copyright © 1999
Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
(t)
)
2.63
0
1.00
(VIN) Input Voltage - (V)
3.00
(V
OUT
) RESET Output Voltage - (V)
0.50
1.50
2.00
2.65 2.67 2.69 2.71
RL = 82k
TA = 25°C
2.73
2.50
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 1. — INPUT VOLTAGE and RESET OUTPUT
VOLTAGE vs. TIME
10
RL = 82k
7.5
T
= 25°C
A
5
2.5
RESET - (V)
0
10
7.5
- (V)
IN
5
V
2.5
0
.2 .6 .8
0.4 1.0
1.2 1.4 1.6 1.8 2.0
FIGURE 2. — POWER-UP RESET VOLTAGE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
Power-Up RESET Voltage - (V)
0.2
RL = 10kohms
= 25°C
T
A
V
IN
0
00.8 2.0
0.4 1.2 1.6
RESET
FIGURE 3. — POWER-DOWN RESET VOLTAGE FIGURE 4. — RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE
2.0
RL = 10kohms
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
Power-Down RESET Voltage - (V)
0.2
0
= 25°C
T
A
RESET
00.8 2.0
(t) Time - (ms)
V
IN
0.4 1.2 1.6
Time - (ms
(t) Time - (ms)
Copyright © 1999
Rev. 1.2 6/99
5
PRODUCT DATABOOK 1996/1997
0
40
(TA) Ambient Temperature - (°C)
100
(V
H
) Threshold Hysteresis - (mV)
20
50
80
10
60
70
90
30
-50
-25
0255075100
0.0
10.0
(TA) Ambient Temperature - (°C)
25.0
(I
IN
) Quiescent Input Current - (µA)
5.0
20.0
15.0
-50
-25
0255075100
No Load
VIN = 3V
VIN = 6V
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 5. — THRESHOLD VOLTAGE vs. TEMPERATURE
2.800
2.775
2.750
2.725
2.700
2.675
2.650
2.625
) Threshold Voltage - (V)
T
(V
2.600
2.575
VT+ High Threshold Voltage
VT- Low Threshold Voltage
FIGURE 6. — THRESHOLD HYSTERESIS vs. TEMPERATURE
2.550
-50
-25
(TA) Ambient Temperature - (°C)
FIGURE 7. — SUPPLY CURRENT vs. INPUT VOLTAGE
200
180
160
140
120
100
80
) Input Current - (µA)
60
IN
(I
40
20
0
04 10
268
0255075100
RL = No Load
= 25°C
T
A
(VIN) Input Voltage - (V)
FIGURE 8. — SUPPLY CURRENT vs. TEMPERATURE
6
Copyright © 1999
Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
0
30
(TA) Ambient Temperature - (°C)
100
(V
OL
) Output Sink Saturation - (mV)
20
80
60
-50
-25
0255075100
VIN = 2.4V
I
OUT
= 1mA
10
40
50
70
90
040 100
-0.6
(IF) Diode Forward Current - (mA)
(V
F
) Clamp Diode Forward Voltage - (V)
20 60 8010 30 50 70 90
85°C
25°C
-40°C
-0.7
-0.8
-0.9
-1
-1.1
-1.2
-1.3
-1.4
-1.5
-1.6
MC33164-3/MC34164-3
3V U
P RODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 9. — LOW LEVEL OUTPUT CURRENT
vs. TEMPERATURE
40
VIN = V
35
30
25
20
15
10
) Output Sink Current - (mA)
SINK
(I
5
OUT
= 2.4V
NDERVOLTAGE SENSING CIRCUIT
FIGURE 10. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
0
-50
-25
0255075100
(TA) Ambient Temperature - (°C)
FIGURE 11. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
50
VIN = 1V
45
I
= 250µA
OUT
40
35
30
Copyright © 1999
Rev. 1.2 6/99
25
20
15
) Output Sink Saturation - (mV)
10
OL
(V
5
0
-50
-25
0255075100
(TA) Ambient Temperature - (°C)
FIGURE 12. — CLAMP DIODE FORWARD VOLTAGE
vs. FORWARD CURRENT
7
PRODUCT DATABOOK 1996/1997
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 13. — PROPAGATION DELAY — HIGH to LOW
V
4.0
- (V)
IN
V
3.0
2.0
2.5
1.5
RESET - (V)
0.5
0
-0.5
01.5 4
IN
TA = 25°C
.5 2.51233.5
3.5V
2.4V
REF
10K
RESET
FIGURE 14. — PROPAGATION DELAY — LOW to HIGH
5.5
TA = 25°C
4.0
- (V)
IN
V
3.0
2.0
2.5
V
1.5
RESET - (V)
0.5
0
54.5
-0.5
06 20
2104 8 12 14
IN
3.5V
2.4V
REF
16 18
10K
RESET
(t) Time - (µs)
FIGURE 15. — MINIMUM OPERATING VOLTAGE OVER TEMPERATURE
1.000
0.950
0.900
0.850
0.800
0.750
0.700
0.650
0.600
) Minimum Operating Voltage - (V)
IN-MIN.
0.550
(V
0.500
VIN = Ramp Down
I
= 250µA
OUT
-50
-25
0255075100
(TA) Ambient Temperature - (°C)
(t) Time - (µs)
8
Copyright © 1999
Rev. 1.2 6/99
PRODUCT DATABOOK 1996/1997
k
MC33164-3/MC34164-3
3V U
NDERVOLTAGE SENSING CIRCUIT
P RODUCTION DATA SHEET
TYPICAL APPLICATION CIRCUITS
FIGURE 16. — LOW VOLTAGE MICROPROCESSOR RESET
RESET
C
R
Microprocessor
Circuit
DLY
DLY
V
IN
Power
Supply
1.2 V
REF
A time delayed reset can be accomplished with the addition of C
For systems with extremely fast power supply rise times (< 500ns) it
is recommended that the RC
V
is the microprocessor reset input threshold.
TH(MPU)
time constant be greater than 5.0µs.
DLY
1
t
DLY
= R C
DLY
In
1 -
V
TH(MPU)
V
IN
FIGURE 17. — SWITCHING THE LOAD OFF WHEN
BATTERY REACHES BELOW 2.7V
V
IN
RESET
1.2V
.
REF
Load
FIGURE 18. — VOLTAGE MONITOR
1.0
V
IN
Power
Supply
1.2V
REF
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.
RESET
FIGURE 20. — SOLAR POWERED BATTERY CHARGER
V
IN
RESET
1.2V
REF
SOLAR
CELLS
Copyright © 1999
Rev. 1.2 6/99
9
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