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MCP121
  • MCP121
  • MCP121
  • MCP121

MCP121

In Production

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. These devices are designed to hold the microcontroller in reset until the supply voltage reaches a predetermined operating level. These devices also protect against brownout conditions that occur as a result of the supply voltage dropping below a tolerable level.

Microchip Technology MCP121 Product Info

16 April 2026 0

Parameters

Driver Type

Supervisor

Min Operating Voltage (V)

1

Max Operating Voltage (V)

5.5

Nominal Reset Voltage Min

1.9

Nominal Reset Voltage Max

4.63

Watchdog Timer

No

Manual Reset

No

Power Fail

No

Min Operating Ambient Temperature (°C)

-40

Max Operating Ambient Temperature (°C)

125

Features

  • Operating current: 1.75uA (max)
  • Wide Voltage range: 1.0V to 5.5V
  • Available Trip Points: 1.9V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V, 4.63V
  • Trip point accuracy: +/- 1.5%
  • Output Options: Open-Drain
  • Package options: SOT23-3, SC70-3, TO92-3

Description

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. These devices are designed to hold the microcontroller in reset until the supply voltage reaches a predetermined operating level. These devices also protect against brownout conditions that occur as a result of the supply voltage dropping below a tolerable level.

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