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
MICROCHIP [ MICROCHIP TECHNOLOGY ]
