MCP111/112
Micropower Voltage Detector
Features
Package Types
• Ultra-low supply current: 1.75 µA (max.)
• Precision monitoring options of:
3-Pin SOT23-3/SC-70
3-Pin SOT-89
VDD
- 1.90V, 2.32V, 2.63V, 2.90V, 2.93V, 3.08V,
4.38V and 4.63V
VOUT
1
2
• Resets microcontroller in a power-loss event
• Active-low VOUT pin:
VDD
3
MCP111/112
- MCP111 active-low, open-drain
- MCP112 active-low, push-pull
VSS
1
2
3
VOUT V
DD VSS
• Available in SOT23-3, TO-92, SC-70 and
SOT-89-3 packages
3-Pin TO-92
• Temperature Range:
- Extended: -40°C to +125°C
(except MCP1XX-195)
- Industrial: -40°C to +85°C (MCP1XX-195 only)
VOUT
VSS
VDD
• Pb-free devices
Applications
Block Diagram
• Critical Microcontroller and Microprocessor
Power-Monitoring Applications
VDD
• Computers
• Intelligent Instruments
• Portable Battery-Powered Equipment
Comparator
VOUT
+
–
Output
Driver
Description
The MCP111/112 are voltage-detecting devices
designed to keep a microcontroller in reset until the
system voltage has stabilized at the appropriate level
for reliable system operation. These devices also
operate as protection from brown-out conditions when
the system supply voltage drops below the specified
threshold voltage level. Eight different trip voltages are
available.
Band Gap
Reference
VSS
TABLE 1:
DEVICE FEATURES
Output
Reset Delay Package Pin Out
(typ) (Pin # 1, 2, 3)
Device
Comment
Type
Pull-up Resistor
MCP111 Open-drain
MCP112 Push-pull
MCP102 Push-pull
External
No
No
No
V
, V , V
OUT SS
DD
V
, V , V
OUT SS
DD
No
120 ms
120 ms
120 ms
120 ms
RST, V , V
See MCP102/103/121/131 Data Sheet
(DS21906)
DD
SS
MCP103 Push-pull
MCP121 Open-drain
No
VSS, RST, V
See MCP102/103/121/131 Data Sheet
(DS21906)
DD
External
RST, V , V
See MCP102/103/121/131 Data Sheet
(DS21906)
DD
SS
MCP131 Open-Drain Internal (~95 kΩ)
RST, V , V
See MCP102/103/121/131 Data Sheet
DD
SS
(DS21906)
© 2005 Microchip Technology Inc.
DS21889D-page 1