MCP111 Datasheet, PDF (1/22 Pages) Microchip Technology – Micropower Voltage Detector

MCP111/112
Micropower Voltage Detector
Features
• Ultra-low supply current: 1.75 µA (max.)
• Precision monitoring options of:
- 1.90V, 2.32V, 2.63V, 2.90V, 2.93V, 3.08V,
4.38V and 4.63V
• Resets microcontroller in a power-loss event
• Active-low V_OUT pin:
- MCP111 active-low, open-drain
- MCP112 active-low, push-pull
• 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)
Applications
• Critical µC and µP Power-monitoring Applications
• Computers
• Intelligent Instruments
• Portable Battery-Powered Equipment
Block Diagram
V_DD
Comparator
+
–
Output
Driver
V_OUT
Band Gap
Reference
V_SS
Description
The MCP111/112 are voltage-detecting devices
designed to keep a microcontroller in reset until the
system voltage has reached, and 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 a safe operating level. The MCP111 and
MCP112 are available in eight different trip voltages.
The MCP111 has an open-drain output with an active-
low pin (V_OUT). This device will assert V_OUT when the
voltage on the V_DD pin is below the trip-point voltage.
The MCP112 has a push-pull output and will assert an
active-low signal (V_OUT pin) when the voltage on the
V_DD pin is below the trip-point voltage.
During operation, the output (V_OUT) remains at a logic-
high as long as V_DD is greater than the specified
threshold voltage. When V_DD falls below the voltage
trip point, V_OUT is driven low.
Package Types
SOT23-3/SC-70
V_OUT 1
V_{SS 2}
3 ^V_DD
TO-92
V_OUT
V_DD ^VSS
 2004 Microchip Technology Inc.
DS21889B-page 1