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, typ.)
• Available in SOT23-3, TO-92 and SC-70
packages
• Temperature Range:
- Extended: -40°C to +125°C
(except
MCP1XX-195)
- Industrial: -40°C to +85°C (MCP1XX-195
only)
• Pb-free devices
Package Types
SOT23-3/SC-70
RST 1
MCP102/121/131
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
Block Diagram
V
DD
R
(1)
Comparator
+
–
Band Gap
Reference
V
SS
Note 1:
MCP131 Only
Reset
Delay
Circuit
Output
Driver
Applications
• Critical Microcontroller and Microprocessor
Power-monitoring Applications
• Computers
• Intelligent Instruments
• Portable Battery-powered Equipment
RST
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. Table 1
shows the available features for these devices.
TABLE 1:
Device
DEVICE FEATURES
Output
Type
Reset
Package Pinout
(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
©
2005 Microchip Technology Inc.
DS21906B-page 1
MCP102/103/121/131
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum
Ratings” 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.
Exposure 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 (except RST) w.r.t. V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (V
DD
+ 1.0V)
RST output w.r.t. V
SS
. . . . . . . . . . . . . . . . . . . -0.6V to 13.5V
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
—
—
—
—
—
Note 1:
2:
3:
4:
5:
Typ
—
—
<1
—
<1
—
—
1.75
20.0
1.75
75
90
Max
5.5
Units
V
V
µA
µA
µA
µA
µA
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)
Conditions
6:
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.
This specification allows this device to be used in PICmicro
®
microcontroller applications that require In-Circuit Serial
Programming™ (ICSP™) (see device-specific programming specifications for voltage requirements). This specification
DOES NOT allow a continuos high voltage to be present on the open-drain output pin (V
OUT
). The total time that the
V
OUT
pin can be above the maximum device operational voltage (5.5V) is 100s. Current into the V
OUT
pin should be
limited to 2 mA and it is recommended that the device operational temperature be maintained between 0°C to 70°C
(+25°C preferred). For additional information, please refer to Figure 2-33.
This parameter is established by characterization and not 100% tested.
DS21906B-page 2
©
2005 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
V
DD
Trip Point
MCP1XX-195
Sym
V
TRIP
Min
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
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 High Voltage on Output
(MCP121 only)
V
OL
V
OH
R
PU
V
ODH
T
TPCO
V
HYS
—
0.019
0.023
0.026
0.029
0.031
0.044
0.046
—
V
DD
– 0.6
—
—
Typ
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
—
—
—
—
—
—
—
—
—
95
—
Max
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
—
0.114
0.139
0.158
0.176
0.185
0.263
0.278
0.4
—
—
13.5
(5)
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
V
V
V
V
V
V
V
V
V
kΩ
V
I
OL
= 500 µA, V
DD
= V
TRIP(MIN)
I
OH
= 1 mA, For
MCP102/MCP103
only (push-pull output)
V
DD
= 5.5V
V
DD
= 3.0V, Time voltage > 5.5V
applied
≤
100s,
current into pin limited to 2 mA, 25°C
operation recommended
(Note 5, Note 6)
T
A
= +25°C
Conditions
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
Open-drain Output Leakage Current
(MCP121 only)
Note 1:
2:
3:
4:
5:
I
OD
—
0.1
—
µA
6:
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.
This specification allows this device to be used in PICmicro
®
microcontroller applications that require In-Circuit Serial
Programming™ (ICSP™) (see device-specific programming specifications for voltage requirements). This specification
DOES NOT allow a continuos high voltage to be present on the open-drain output pin (V
OUT
). The total time that the
V
OUT
pin can be above the maximum device operational voltage (5.5V) is 100s. Current into the V
OUT
pin should be
limited to 2 mA and it is recommended that the device operational temperature be maintained between 0°C to 70°C
(+25°C preferred). For additional information, please refer to Figure 2-33.
This parameter is established by characterization and not 100% tested.
©
2005 Microchip Technology Inc.
DS21906B-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-TO-92
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
DS21906B-page 4
©
2005 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
100
120
-40
-20
0
20
40
60
80
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
100
120
120
-40
-20
0
20
40
60
80
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
100
120
140
-40
-20
0
20
40
60
80
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
MCP131-315
5.5V
5.0V
4.5V
4.0V
3.3V
100
Temperature (°C)
Temperature (°C)
FIGURE 2-2:
I
DD
vs. Temperature
(Reset 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
FIGURE 2-5:
I
DD
vs. Temperature
(Reset 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
20
40
60
80
100
120
140
I
DD
(uA)
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
I
DD
vs. Temperature
FIGURE 2-3:
(Reset Power-up Timer Inactive) (MCP121-450).
I
DD
vs. Temperature
FIGURE 2-6:
(Reset Power-up Timer Active) (MCP121-450).
©
2005 Microchip Technology Inc.
DS21906B-page 5
140
0
-40
-20
-40
-20
0
140
-40
-20
0
20
40
60
80
140
PCB Design
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