2004 Microchip Technology Inc.
DS-21906A-page 1
MCP102/103/121/131
Features
Ultra low supply current: 1.75 A (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: -40C to +125C
(except MCP1XX-195)
- Industrial: -40C to +85C (MCP1XX-195 only)
Lead Free Packaging
Applications
Critical Microcontroller and Microprocessor Power
Monitoring Applications
Computers
Intelligent Instruments
Portable Battery-Powered Equipment
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.
Package Types
Block Diagram
TABLE 1:
DEVICE FEATURES
SOT23-3/SC-70
V
SS
RST
M
C
P102
/12
1
/1
31
1
2
3
V
DD
RST
TO-92
SOT23-3/SC-70
V
DD
V
SS
MCP
1
03
1
2
3
RST
V
DD
V
SS
V
DD
Comparator
+
Output
Driver
RST
Band Gap
Reference
V
SS
Reset
Delay
Circuit
R
(1)
Note 1: MCP131 Only
Device
Output
Reset
Delay (typ)
Package Pin Out
(Pin # 1, 2, 3)
Comment
Type
Pull-up Resistor
MCP102 Push-Pull
No
120 ms
RST, V
DD
, V
SS
MCP103 Push-Pull
No
120 ms
V
SS
, RST, V
DD
MCP121 Open-Drain External
120 ms
RST, V
DD
, V
SS
MCP131 Open-Drain Internal (~95 k
)
120 ms
RST, V
DD
, V
SS
MCP111 Open-Drain External
No
V
OUT
, V
SS
, V
DD
See MCP111/112 Data Sheet
(DS21889)
MCP112 Push-Pull
No
No
V
OUT
, V
SS
, V
DD
See MCP111/112 Data Sheet
(DS21889)
Micropower Voltage Supervisors
MCP102/103/121/131
DS-21906A-page 2
2004 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
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/s
All inputs and outputs w.r.t. V
SS
. . . . . 0.6V to (V
DD
+ 1.0V)
Storage temperature . . . . . . . . . . . . . . . . . . 65C to + 150C
Ambient temp. with power applied . . . . . . . 40C to + 125C
Maximum Junction temp. with power applied . . . . . . . . 150C
ESD protection on all pins
. . . . . . . . . . . . . . . . . . . . . . . . .
2 kV
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.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 k
(MCP121 only), T
A
= -40C to +125C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Operating Voltage Range
V
DD
1.0
--
5.5
V
Specified V
DD
Value to RST low
V
DD
1.0
--
V
I
RST
= 10 uA, V
RST
< 0.2V
Operating Current
MCP102,
MCP103,
I
DD
--
< 1
1.75
A
Reset Power-up Timer (t
RPU
) Inactive
MCP121
--
--
20.0
A
Reset Power-up Timer (t
RPU
) Active
MCP131
I
DD
--
< 1
1.75
A
V
DD
> V
TRIP
and Reset Power-up
Timer (t
RPU
) Inactive
--
--
75
A
V
DD
< V
TRIP
and Reset Power-up
Timer (t
RPU
) Inactive (Note 3)
--
--
90
A
Reset Power-up Timer (t
RPU
) Active
(Note 4)
V
DD
Trip Point
MCP1XX-195
V
TRIP
1.872
1.900
1.929
V
T
A
= +25C (Note 1)
1.853
1.900
1.948
V
T
A
= -40C to +85C (Note 2)
MCP1XX-240
2.285
2.320
2.355
V
T
A
= +25C (Note 1)
2.262
2.320
2.378
V
(Note 2)
MCP1XX-270
2.591
2.630
2.670
V
T
A
= +25C (Note 1)
2.564
2.630
2.696
V
(Note 2)
MCP1XX-300
2.886
2.930
2.974
V
T
A
= +25C (Note 1)
2.857
2.930
3.003
V
(Note 2)
MCP1XX-315
3.034
3.080
3.126
V
T
A
= +25C (Note 1)
3.003
3.080
3.157
V
(Note 2)
MCP1XX-450
4.314
4.380
4.446
V
T
A
= +25C (Note 1)
4.271
4.380
4.490
V
(Note 2)
MCP1XX-475
4.561
4.630
4.700
V
T
A
= +25C (Note 1)
4.514
4.630
4.746
V
(Note 2)
V
DD
Trip Point Tempco
T
TPCO
--
100
--
ppm/C
Note
1:
Trip point is 1.5% from typical value.
2:
Trip point is 2.5% from typical value.
3:
RST output is forced low. There is a current through the internal pull-up resistor.
4:
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
Threshold
Hysteresis
(
min. = 1%,
max = 6%)
MCP1XX-195
V
HYS
0.019
--
0.114
V
T
A
= +25C
MCP1XX-240
0.023
--
0.139
V
MCP1XX-270
0.026
--
0.158
V
MCP1XX-300
0.029
--
0.176
V
MCP1XX-315
0.031
--
0.185
V
MCP1XX-450
0.044
--
0.263
V
MCP1XX-475
0.046
--
0.278
V
RST Low-level Output Voltage
V
OL
--
--
0.4
V
I
OL
= 500 A, V
DD
= V
TRIP(MIN)
RST High-level Output Voltage
(MCP102 and MCP103 only)
V
OH
V
DD
0.6
--
--
V
I
OH
= 1 mA, For MCP102/MCP103
only (push-pull output)
Internal Pull-up Resistor
(MCP131 only)
R
PU
--
95
--
k
V
DD
= 5.5V
Open-Drain Output Leakage Current
(MCP121 only)
I
OD
--
0.1
--
A
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 k
(MCP121 only), T
A
= -40C to +125C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note
1:
Trip point is 1.5% from typical value.
2:
Trip point is 2.5% from typical value.
3:
RST output is forced low. There is a current through the internal pull-up resistor.
4:
This includes the current through the internal pull-up resistor and the reset power-up timer.
MCP102/103/121/131
DS-21906A-page 4
2004 Microchip Technology Inc.
FIGURE 1-1:
Timing Diagram.
AC CHARACTERISTICS
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 k
(MCP121 only), T
A
= -40C to +125C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
V
DD
Detect to RST Inactive
t
RPU
80
120
180
ms
Figure 1-1 and C
L
= 50 pF
V
DD
Detect to RST Active
t
RPD
--
130
--
s
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)
RST Rise Time After RST
Active
(MCP102 and MCP103 only)
t
RT
--
5
--
s
For RST 10% to 90% of final value
per Figure 1-1, C
L
= 50 pF
(Note 1)
Note
1:
These parameters are for design guidance only and are not 100% tested.
1V
1V
V
TRIP
V
DD
RST
t
RPU
V
OH
t
RT
t
RPD
V
OL
Electrical Specifications: Unless otherwise noted, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 k
(MCP121 only), T
A
= -40C to +125C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Temperature Ranges
Specified Temperature Range
T
A
-40
--
+85
C
MCP1XX-195
Specified Temperature Range
T
A
-40
--
+125
C
Except MCP1XX-195
Maximum Junction Temperature
T
J
--
--
+150
C
Storage Temperature Range
T
A
-65
--
+150
C
Package Thermal Resistances
Thermal Resistance, 3L-SOT23
JA
--
336
--
C/W
Thermal Resistance, 3L-SC-70
JA
--
340
--
C/W
Thermal Resistance, 3L-TO92
JA
--
131.9
--
C/W
2004 Microchip Technology Inc.
DS-21906A-page 5
MCP102/103/121/131
2.0
TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, all limits are specified for:
V
DD
= 1V to 5.5V, R
PU
= 100 k
(MCP121 only; see Figure 4-1), T
A
= -40C to +125C.
FIGURE 2-1:
I
DD
vs. Temperature (Reset
Power-up Timer Inactive) (MCP102-195).
FIGURE 2-2:
I
DD
vs. Temperature (Reset
Power-up Timer Inactive) (MCP131-315).
FIGURE 2-3:
I
DD
vs. Temperature (Reset
Power-up Timer Inactive) (MCP121-450).
FIGURE 2-4:
I
DD
vs. Temperature (Reset
Power-up Timer Active) (MCP102-195).
FIGURE 2-5:
I
DD
vs. Temperature (Reset
Power-up Timer Active) (MCP131-315).
FIGURE 2-6:
I
DD
vs. Temperature (Reset
Power-up Timer Active) (MCP121-450).
Note:
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.
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
-4
0
-2
0
0
20
40
60
80
10
0
12
0
14
0
Temperature (C)
I
DD
(u
A
)
1.7V
1.0V
2.1V
2.8V
4.0V
5.0V
5.5V
MCP102-195
0
5
10
15
20
25
30
35
-4
0
-2
0
0
20
40
60
80
10
0
12
0
14
0
Temperature (C)
I
DD
(u
A
)
1.0V
2.9V
MCP131-315
3.3V, 4.0V, 5.0V, 5.5V
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
-40
-20
0
20
40
60
80
100
120
140
Temperature (C)
I
DD
(u
A
)
3.0V
1.0V
4.6V
4.1V
5.0V
5.5V
MCP121-450
4.8V
0
2
4
6
8
10
12
14
16
-4
0
-2
0
0
20
40
60
80
10
0
12
0
14
0
Temperature (C)
I
DD
(u
A
)
2.1V
2.8V
4.0V
5.0V
5.5V
MCP102-195
0
10
20
30
40
50
60
70
80
-4
0
-2
0
0
20
40
60
80
10
0
12
0
14
0
Temperature (C)
I
DD
(u
A
)
3.3V
4.0V
4.5V
5.0V
MCP131-315
5.5V
0
2
4
6
8
10
12
14
16
-40
-20
0
20
40
60
80
100
120
140
Temperature (C)
I
DD
(u
A
)
4.6V
5.0V
5.5V
MCP121-450
4.8V
PDF 
ZIP