MCP102/103/121/131
Micropower Voltage Supervisors
Features
Package Types
SOT23-3/SC-70
• Ultra low supply current: 1.75 µA (steady state max.)
TO-92
•
Precision monitoring options of:
- 1.90V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V
and 4.63V
1
2
RST
VDD
• Resets microcontroller in a power-loss event
• RST pin (Active-low):
VSS
3
RST
VSS
VDD
- MCP121: Active-low, open-drain
- MCP131: Active-low, open-drain with internal
pull-up resistor
SOT23-3/SC-70
- MCP102 and MCP103: Active-low, push-pull
• Reset Delay Timer (120 ms delay typical)
VSS
1
• Available in SOT23-3, TO-92 and SC70 packages
•
Temperature Range:
VDD
3
- Extended: -40°C to +125°C
(except MCP1XX-195)
RST
2
- Industrial: -40°C to +85°C (MCP1XX-195 only)
• Lead Free Packaging
Applications
Block Diagram
• Critical Microcontroller and Microprocessor Power
Monitoring Applications
VDD
R (1)
• Computers
• Intelligent Instruments
• Portable Battery-Powered Equipment
Comparator
+
–
Reset
Delay
Circuit
Output
Driver
General Description
RST
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.
Band Gap
Reference
VSS
Note 1: MCP131 Only
Comment
TABLE 1:
Device
DEVICE FEATURES
Output
Reset
Delay (typ)
Package Pin Out
(Pin # 1, 2, 3)
Type
Pull-up Resistor
MCP102 Push-Pull
MCP103 Push-Pull
No
No
120 ms
120 ms
120 ms
RST, VDD, VSS
VSS, RST, VDD
RST, VDD, VSS
RST, VDD, VSS
VOUT, VSS, VDD
MCP121 Open-Drain External
MCP131 Open-Drain Internal (~95 kΩ) 120 ms
MCP111 Open-Drain External
No
See MCP111/112 Data Sheet
(DS21889)
MCP112 Push-Pull No
No
VOUT, VSS, VDD
See MCP111/112 Data Sheet
(DS21889)
2004 Microchip Technology Inc.
DS-21906A-page 1