MCP102/103/121/131
Micropower Voltage Supervisors
Features
• Ultra low supply current: 1.75 µA (steady state max.)
• Precision monitoring options of:
- 1.90V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V
and 4.63V
• Resets microcontroller in a power-loss event
• RST pin (Active-low):
-
MCP121:
Active-low, open-drain
-
MCP131:
Active-low, open-drain with internal
pull-up resistor
-
MCP102
and
MCP103:
Active-low, push-pull
• Reset Delay Timer (120 ms delay typical)
• Available in SOT23-3, TO-92 and SC70 packages
• Temperature Range:
- Extended: -40°C to +125°C
(except
MCP1XX-195)
- Industrial: -40°C to +85°C (MCP1XX-195
only)
• Lead Free Packaging
Package Types
SOT23-3/SC-70
MCP102/121/131
RST 1
TO-92
3 V
SS
RST
V
DD
V
SS
V
DD
2
SOT23-3/SC-70
V
SS
1
MCP103
3 V
DD
RST 2
Applications
• Critical Microcontroller and Microprocessor Power
Monitoring Applications
• Computers
• Intelligent Instruments
• Portable Battery-Powered Equipment
Block Diagram
V
DD
R
(1)
Comparator
+
–
Band Gap
Reference
V
SS
Note 1: MCP131 Only
Reset
Delay
Circuit
Output
Driver
General Description
The MCP102/103/121/131 are voltage supervisor
devices designed to keep a microcontroller in reset
until the system voltage has reached and stabilized at
the proper level for reliable system operation. The table
below shows the available features for these devices.
RST
TABLE 1:
Device
DEVICE FEATURES
Output
Type
Reset
Package Pin Out
(Pin # 1, 2, 3)
Pull-up Resistor Delay (typ)
120 ms
120 ms
120 ms
No
No
RST, V
DD
, V
SS
V
SS
, RST, V
DD
RST, V
DD
, V
SS
RST, V
DD
, V
SS
V
OUT
, V
SS
, V
DD
V
OUT
, V
SS
, V
DD
See MCP111/112 Data Sheet
(DS21889)
See MCP111/112 Data Sheet
(DS21889)
Comment
MCP102
Push-Pull
MCP103
Push-Pull
No
No
MCP121
Open-Drain External
MCP111
Open-Drain External
MCP112
Push-Pull
No
MCP131
Open-Drain Internal (~95 kΩ) 120 ms
2004 Microchip Technology Inc.
DS-21906A-page 1
MCP102/103/121/131
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
Absolute Maximum Ratings†
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V
Input current (V
DD
) . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Output current (RST) . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Rated Rise Time of V
DD
. . . . . . . . . . . . . . . . . . . . . . 100V/µs
All inputs and outputs w.r.t. V
SS
. . . . . –0.6V to (V
DD
+ 1.0V)
Storage temperature . . . . . . . . . . . . . . . . . . –65°C to + 150°C
Ambient temp. with power applied . . . . . . . –40°C to + 125°C
Maximum Junction temp. with power applied . . . . . . . . 150°C
ESD protection on all pins
. . . . . . . . . . . . . . . . . . . . . . . . . ≥
2 kV
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 kΩ (MCP121 only), T
A
= -40°C to +125°C.
Parameters
Operating Voltage Range
Specified V
DD
Value to RST low
Operating Current
MCP102,
MCP103,
MCP121
MCP131
I
DD
Sym
V
DD
V
DD
I
DD
Min
1.0
1.0
—
—
—
—
—
V
DD
Trip Point
MCP1XX-195
V
TRIP
1.872
1.853
MCP1XX-240
2.285
2.262
MCP1XX-270
2.591
2.564
MCP1XX-300
2.886
2.857
MCP1XX-315
3.034
3.003
MCP1XX-450
4.314
4.271
MCP1XX-475
4.561
4.514
V
DD
Trip Point Tempco
Note 1:
2:
3:
4:
T
TPCO
—
Typ
—
—
<1
—
<1
—
—
1.900
1.900
2.320
2.320
2.630
2.630
2.930
2.930
3.080
3.080
4.380
4.380
4.630
4.630
±100
1.75
20.0
1.75
75
90
1.929
1.948
2.355
2.378
2.670
2.696
2.974
3.003
3.126
3.157
4.446
4.490
4.700
4.746
—
Max
5.5
Units
V
V
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
I
RST
= 10 uA, V
RST
< 0.2V
Reset Power-up Timer (t
RPU
) Inactive
Reset Power-up Timer (t
RPU
) Active
V
DD
> V
TRIP
and Reset Power-up
Timer (t
RPU
) Inactive
V
DD
< V
TRIP
and Reset Power-up
Timer (t
RPU
) Inactive
(Note 3)
Reset Power-up Timer (t
RPU
) Active
(Note 4)
T
A
= +25°C
(Note 1)
T
A
= -40°C to +85°C
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
T
A
= +25°C
(Note 1)
(Note 2)
Conditions
Trip point is ±1.5% from typical value.
Trip point is ±2.5% from typical value.
RST output is forced low. There is a current through the internal pull-up resistor.
This includes the current through the internal pull-up resistor and the reset power-up timer.
DS-21906A-page 2
2004 Microchip Technology Inc.
MCP102/103/121/131
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 kΩ (MCP121 only), T
A
= -40°C to +125°C.
Parameters
Threshold
Hysteresis
(min.
= 1%,
max = 6%)
MCP1XX-195
MCP1XX-240
MCP1XX-270
MCP1XX-300
MCP1XX-315
MCP1XX-450
MCP1XX-475
RST Low-level Output Voltage
RST High-level Output Voltage
(MCP102 and MCP103 only)
Internal Pull-up Resistor
(MCP131 only)
Open-Drain Output Leakage Current
(MCP121 only)
Note 1:
2:
3:
4:
V
OL
V
OH
R
PU
I
OD
Sym
V
HYS
Min
0.019
0.023
0.026
0.029
0.031
0.044
0.046
—
V
DD
– 0.6
—
—
Typ
—
—
—
—
—
—
—
—
—
95
0.1
Max
0.114
0.139
0.158
0.176
0.185
0.263
0.278
0.4
—
—
—
Units
V
V
V
V
V
V
V
V
V
kΩ
µA
I
OL
= 500 µA, V
DD
= V
TRIP(MIN)
I
OH
= 1 mA, For
MCP102/MCP103
only (push-pull output)
V
DD
= 5.5V
T
A
= +25°C
Conditions
Trip point is ±1.5% from typical value.
Trip point is ±2.5% from typical value.
RST output is forced low. There is a current through the internal pull-up resistor.
This includes the current through the internal pull-up resistor and the reset power-up timer.
2004 Microchip Technology Inc.
DS-21906A-page 3
MCP102/103/121/131
V
TRIP
1V
V
DD
t
RPU
t
RPD
V
OH
1V
RST
t
RT
V
OL
FIGURE 1-1:
Timing Diagram.
AC CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 kΩ (MCP121 only), T
A
= -40°C to +125°C.
Parameters
V
DD
Detect to RST Inactive
V
DD
Detect to RST Active
Sym
t
RPU
t
RPD
Min
80
—
Typ
120
130
Max
180
—
Units
ms
µs
Conditions
Figure 1-1
and C
L
= 50 pF
V
DD
ramped from V
TRIP(MAX)
+
250 mV down to V
TRIP(MIN)
–
250 mV, per
Figure 1-1,
C
L
= 50 pF
(Note 1)
For RST 10% to 90% of final value
per
Figure 1-1,
C
L
= 50 pF
(Note 1)
RST Rise Time After RST Active
(MCP102 and MCP103 only)
Note 1:
t
RT
—
5
—
µs
These parameters are for design guidance only and are not 100% tested.
TEMPERATURE CHARACTERISTICS
Electrical Specifications:
Unless otherwise noted, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 kΩ (MCP121 only), T
A
= -40°C to +125°C.
Parameters
Temperature Ranges
Specified Temperature Range
Specified Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Package Thermal Resistances
Thermal Resistance, 3L-SOT23
Thermal Resistance, 3L-SC-70
Thermal Resistance, 3L-TO92
θ
JA
θ
JA
θ
JA
—
—
—
336
340
131.9
—
—
—
ºC/W
ºC/W
ºC/W
T
A
T
A
T
J
T
A
-40
-40
—
-65
—
—
—
—
+85
+125
+150
+150
ºC
ºC
ºC
ºC
MCP1XX-195
Except MCP1XX-195
Sym
Min
Typ
Max
Units
Conditions
DS-21906A-page 4
2004 Microchip Technology Inc.
MCP102/103/121/131
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note:
Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 kΩ (MCP121 only; see
Figure 4-1),
T
A
= -40°C to +125°C.
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
20
40
60
80
100
120
-40
-20
Temperature (°C)
16
MCP102-195
5.5V
5.0V
4.0V
2.8V
2.1V
1.7V
1.0V
MCP102-195
5.5V
5.0V
14
12
I
DD
(uA)
10
8
6
4
2
0
0
20
40
60
80
100
120
120
-40
-20
4.0V
2.8V
2.1V
I
DD
(uA)
140
Temperature (°C)
FIGURE 2-1:
I
DD
vs. Temperature (Reset
Power-up Timer Inactive) (MCP102-195).
35
30
25
I
DD
(uA)
20
15
10
5
0
0
20
40
60
80
100
120
140
-40
-20
1.0V
3.3V, 4.0V, 5.0V, 5.5V
FIGURE 2-4:
I
DD
vs. Temperature (Reset
Power-up Timer Active) (MCP102-195).
80
MCP131-315
2.9V
70
60
I
DD
(uA)
50
40
30
20
10
0
0
20
40
60
80
MCP131-315
5.5V
5.0V
4.5V
4.0V
3.3V
100
Temperature (°C)
Temperature (°C)
I
DD
vs. Temperature (Reset
FIGURE 2-2:
Power-up Timer Inactive) (MCP131-315).
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
I
DD
vs. Temperature (Reset
FIGURE 2-5:
Power-up Timer Active) (MCP131-315).
16
MCP121-450
5.5V
MCP121-450
5.5V
5.0V
4.8V
4.6V
14
12
10
8
6
4
2
0
5.0V
4.8V
4.6V
3.0V
1.0V
I
DD
(uA)
4.1V
0
20
40
60
80
100
120
140
I
DD
(uA)
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
FIGURE 2-3:
I
DD
vs. Temperature (Reset
Power-up Timer Inactive) (MCP121-450).
FIGURE 2-6:
I
DD
vs. Temperature (Reset
Power-up Timer Active) (MCP121-450).
2004 Microchip Technology Inc.
DS-21906A-page 5
140
-40
-20
-40
-20
140
-40
-20
140
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