MCP121 Datasheet, PDF (1/24 Pages) Microchip Technology – Micropower Voltage Supervisors

MCP102/103/121/131
Micropower Voltage Supervisors
Features
Package Types
• 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 typical)
• Available in SOT23-3, TO-92 and SC70 packages
• Temperature Range:
- Extended: -40°C to +125°C
(except MCP1XX-195)
- Industrial: -40°C to +85°C (MCP1XX-195 only)
• Lead Free Packaging
SOT23-3/SC-70
TO-92
RST 1
V_DD 2
3 V_SS
RST
V_DD ^VSS
SOT23-3/SC-70
V_{SS 1}
3 V_DD
RST 2
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.
TABLE 1: DEVICE FEATURES
Block Diagram
V_DD
Comparator
+
Reset
Delay
–
Circuit
Output
Driver
R ⁽¹⁾
RST
Band Gap
Reference
V_{SS Note 1: MCP131 Only}
Device
Output
Reset Package Pin Out
Type Pull-up Resistor ^{Delay (typ) (Pin # 1, 2, 3)}
Comment
MCP102 Push-Pull No
120 ms
MCP103 Push-Pull No
120 ms
MCP121 Open-Drain External
120 ms
MCP131 Open-Drain Internal (~95 kΩ) 120 ms
MCP111 Open-Drain External
No
MCP112 Push-Pull No
No
RST, V_DD, V_SS
VSS, 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)
 2004 Microchip Technology Inc.
DS-21906A-page 1