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Datasheet Microchip MCP121-270E/TO

Part NumberMCP121-270E/TO

The MCP121 Series of CMOS voltage detectors are well suited for many portable and consumer electrics applications due to the extremely low 1uA operating current and small surface-mount packaging


  • Download » Datasheet PDF, 676 Kb, Revision: 02-28-2014
    MCP102/103/121/131 Data Sheet
    Docket ↓
    Micropower Voltage Supervisors
    Features: General Description: Ultra-Low Supply Current: 1.75 ВµA
    (steady-state maximum) 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 SOT-23, TO-92 and SC70 Packages Temperature Range:
    -Extended: -40В°C to +125В°C
    (except MCP1XX-195)
    -Industrial: -40В°C to +85В°C (MCP1XX-195 only) Pb-free Devices The MCP102/103/121/131 devices 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. Package Types RST 1 VDD 2 3 VSS RST VDD VSS SOT-23/SC70 Applications: VSS 1
    MCP103 Critical Microcontroller and Microprocessor
    Power-monitoring Applications Computers Intelligent Instruments Portable Battery-powered Equipment TO-92 MCP102/121/131 SOT-23/SC70 RST 3 VDD 2 Block Diagram
    R (1)
    + ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




Manual ResetNo
Nominal Reset Voltage1.95 (I-Temp), 2.4, 2.7, 3, 3.15, 4.5, 4.75 V
Operating Temp. Range-40 to 125 °C
Operating Temperature Range-40 to +125 °C
Power FailNo
Product TypeSupervisor
Reset TypeActive Low
Typical Reset Pulse Width120 ms
Typical Supply Current1 µA
VCC Range1 - 5.5 V
Watchdog TimerNo

Eco Plan


Other Options

MCP102 MCP103 MCP131

Moldel Line

Series: MCP121 (30)

Manufacturer's Classification

  • Power Management > Voltage Detectors

Other Names:

MCP121270E/TO, MCP121 270E/TO

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