P
RODUCTION
D
ATA
S
HEET
T
HE
I
NFINITE
P
OWER OF
I
NNOVATION
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861
W
ESTERN
A
VENUE
,
G
ARDEN
G
ROVE
,
CA.
92841,
714-898-8121,
F
AX
:
714-893-2570
1
Copyright © 1999
Rev. 1.2a,2005-03-09
MC33164-3 / MC34164-3
3V
U
NDERVOLTAGE
S
ENSING
C
IRCUIT
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.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
Monitors +3.3V Supplies (V
T
=
2.7V Typ)
Outputs Fully Defined At V
IN
≥ 1V
(See Product Highlight)
Ultra-Low Supply Current (13µA
Max.)
Temperature Compensated I
CC
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
PRODUCT HIGHLIGHT
PACKAGE ORDER INFO
DM
Plastic SOIC
8-Pin
LP
Plastic TO-92
3-Pin
T
A
(°C)
RoHS Compliant / Pb-free
Transition DC: 0440
RoHS Compliant / Pb-free
Transition DC: 0509
0 to 70 MC34164-3DM MC34164-3LP
-40 to 85 MC33164-3DM MC33164-3LP
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
MC34164-3DM-TR)
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
Copyright © 1999
Rev. 1.2a 11/04
2
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
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) .................................................................................. 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
PACKAGE PIN OUTS
RESET
VIN
N.C.
GROUND
N.C.
N.C.
N.C.
N.C.
DM PACKAGE
(Top View)
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, θθ
θθ
θJA 165°C/W
LP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θθ
θθ
θJA 156°C/W
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
THERMAL DATA
BLOCK DIAGRAM
LP PACKAGE
(Top View)
3. GROUND
2. VIN
1. RESET
1.2 V
REF
V
IN
RESET
GROUND
1 8
2 7
3 6
4 5
Peak Package Solder Reflow Temp. (40 second max. exposure).......................................... 260°C (+0, -5)
RoHS / Pb-free 100% Matte Tin Lead Finish
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
3
Copyright © 1999
Rev. 1.2a 11/04
PRODUCTION DATA SHEET
Input Supply Voltage VIN
RESET Output Voltage VOUT
Clamp Diode Forward Current (Note 3) IF
Operating Ambient Temperature Range:
MC34164-3 TA
MC33164-3 TA
RECOMMENDED OPERATING CONDITIONS (Note 2)
Parameter
Symbol
Units
Recommended Operating Conditions
Min. Typ. Max.
110V
-0.3 10 V
100 mA
070°C
-40 85 °C
Note 2. Range over which the device is guaranteed functional.
Note 3. Maximum junction temperature ratings must be observed.
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.
Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions Units
Comparator Section
2.55 2.71 2.8 V
2.55 2.65 2.8 V
0.03 0.06 V
Threshold Voltage
High State Output VT+ VIN Increasing — 2.4V to 3.5V
Low State Output VT- VIN Decreasing — 3.5V to 2.4V
Hysteresis VH(IOL = 100µA)
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
Output Low Level Saturation Voltage VIN = 2.4V, IOL = 8.0mA
VOL VIN = 2.4V, IOL = 1.0mA
VIN = 1.0V, IOL = 0.25mA
Output Low Level Current IOL VIN , RESET = 2.4V
Output Off-State Leakage IOH VIN , RESET = 3.0V
VIN , RESET = 10V
Clamp Diode Forward Voltage VFPin 1 to pin 2, IF = 5mA
RESET Output Section
MC33164-3 / 34164-3
Min. Typ. Max.
Total Device 913µA
21 30 µA
Supply Current ICC VIN = 3.0V
VIN = 6.0V
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
Copyright © 1999
Rev. 1.2a 11/04
4
PRODUCTION 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
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
5
Copyright © 1999
Rev. 1.2a 11/04
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 2. — POWER-UP RESET VOLTAGE
FIGURE 3. — POWER-DOWN RESET VOLTAGE FIGURE 4. — RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE
FIGURE 1. — INPUT VOLTAGE and RESET OUTPUT
VOLTAGE vs. TIME
0.4 1.0
0
5
(t) Time - (ms)
10
RESET - (V)
2.5
7.5
10
.2 .6 .8
R
L
= 82k
T
A
= 25°C
1.2 1.4 1.6 1.8 2.0
0
5
2.5
7.5
VIN - (V)
00.8 2.0
0
0.8
(
t
)
Time -
(
ms
)
2.0
Power-Down RESET Voltage - (V)
0.4
1.2
1.6
0.4 1.2 1.6
0.2
0.6
1.0
1.4
1.8
RESET
V
IN
R
L
= 10kohms
T
A
= 25°C
2.63
0
1.00
(V
IN
) 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
R
L
= 82k
T
A
= 25°C
2.73
2.50
00.8 2.0
0
0.8
(t) Time - (ms)
2.0
Power-Up RESET Voltage - (V)
0.4
1.2
1.6
0.4 1.2 1.6
0.2
0.6
1.0
1.4
1.8
RESET
V
IN
R
L
= 10kohms
T
A
= 25°C
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
Copyright © 1999
Rev. 1.2a 11/04
6
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 6. — THRESHOLD HYSTERESIS vs. TEMPERATURE
FIGURE 7. — SUPPLY CURRENT vs. INPUT VOLTAGE
FIGURE 5. — THRESHOLD VOLTAGE vs. TEMPERATURE
2.550
2.650
(TA) Ambient Temperature - (°C)
2.800
(V
T
) Threshold Voltage - (V)
2.600
2.675
2.750
2.575
2.700
2.725
2.775
2.625
-50 -25 0255075100
V
T+
High Threshold Voltage
V
T-
Low Threshold Voltage
0
40
(T
A
) Ambient Temperature - (°C)
100
(V
H
) Threshold Hysteresis - (mV)
20
50
80
10
60
70
90
30
-50 -25 0255075100
04 10
0
80
(V
IN
) Input Voltage - (V)
200
(I
IN
) Input Current - (µA)
40
120
160
268
20
60
100
140
180
R
L
= No Load
T
A
= 25°C
0.0
10.0
(T
A
) Ambient Temperature - (°C)
25.0
(I
IN
) Quiescent Input Current - (µA)
5.0
20.0
15.0
-50 -25 0255075100
No Load
V
IN
= 3V
V
IN
= 6V
FIGURE 8. — SUPPLY CURRENT vs. TEMPERATURE
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
7
Copyright © 1999
Rev. 1.2a 11/04
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 10. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
FIGURE 12. — CLAMP DIODE FORWARD VOLTAGE
vs. FORWARD CURRENT
FIGURE 9. — LOW LEVEL OUTPUT CURRENT
vs. TEMPERATURE
FIGURE 11. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
0
10
(TA) Ambient Temperature - (°C)
35
(ISINK) Output Sink Current - (mA)
5
30
25
-50 -25 0255075100
V
IN
= V
OUT
= 2.4V
20
15
40
0
30
(T
A
) Ambient Temperature - (°C)
100
(V
OL
) Output Sink Saturation - (mV)
20
80
60
-50 -25 0255075100
V
IN
= 2.4V
I
OUT
= 1mA
10
40
50
70
90
040 100
-0.6
(I
F
) 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
0
15
(T
A
) Ambient Temperature - (°C)
50
(V
OL
) Output Sink Saturation - (mV)
10
40
30
-50 -25 0255075100
V
IN
= 1V
I
OUT
= 250µA
5
20
25
35
45
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
Copyright © 1999
Rev. 1.2a 11/04
8
PRODUCTION DATA SHEET
CHARACTERISTIC CURVES
FIGURE 14. — PROPAGATION DELAY — LOW to HIGH
FIGURE 13. — PROPAGATION DELAY — HIGH to LOW
01.5 4
0
2.5
(t) Time - (µs)
V
IN
- (V)
1.5
2.0
3.0
.5 2.51233.5
4.0
0.5
RESET - (V)
REF
10K
RESET
3.5V
2.4V
V
IN
-0.5 54.5
T
A
= 25°C
06 20
-0.5
2.5
(t) Time - (µs)
5.5
V
IN
- (V)
1.5
2.0
3.0
2104 8 12 14
4.0
0.5
RESET - (V)
0
16 18
REF
10K
RESET
3.5V
2.4V
V
IN
T
A
= 25°C
FIGURE 15. — MINIMUM OPERATING VOLTAGE OVER TEMPERATURE
0.500
(T
A
) Ambient Temperature - (°C)
(V
IN-MIN.
) Minimum Operating Voltage - (V)
-50 -25 0255075100
V
IN
= Ramp Down
I
OUT
= 250µA
0.550
0.600
0.650
0.700
0.750
0.800
0.850
0.900
0.950
1.000
3V U
NDERVOLTAGE
S
ENSING
C
IRCUIT
MC33164-3/MC34164-3
PRODUCT DATABOOK 1996/1997
9
Copyright © 1999
Rev. 1.2a 11/04
PRODUCTION DATA SHEET
TYPICAL APPLICATION CIRCUITS
FIGURE 16. — LOW VOLTAGE MICROPROCESSOR RESET
1.2V
REF
Power
Supply RESET
V
IN
1.0
k
FIGURE 18. — VOLTAGE MONITOR
FIGURE 17. — SWITCHING THE LOAD OFF WHEN
BATTERY REACHES BELOW 2.7V
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 5.0µs.
VTH(MPU) is the microprocessor reset input threshold.
VTH(MPU)
VIN
1 -
tDLY = R CDLY In 1
1.2 V
REF
V
IN
RESET
Microprocessor
Circuit
C
DLY
Power
Supply
R
Load
1.2V
REF
RESET
V
IN
LED turns on when VIN < 2.7V indicating Power Supply is low.
RESET
V
IN
SOLAR
CELLS
1.2V
REF
FIGURE 20. — SOLAR POWERED BATTERY CHARGER
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.
