MCP7940NT-I/MNY - Microchip Technology

Manufacturer Part Number

MCP7940NT-I/MNY

Manufacturer

Microchip Technology

Introduction

The MCP7940NT-I/MNY is a highly integrated real-time clock/calendar (RTC) IC.

Product Features and Performance

Integrated RTC/Calendar for hour, minutes, seconds, days, months, years, weekday

Alarm function to trigger events at specified times

Leap year compensation

Square wave output for clock reference

64-byte SRAM for scratchpad data storage

HH:MM:SS (12/24 hr) time format

YY-MM-DD-dd date format

I2C, 2-Wire Serial Interface for simple communication with a microcontroller

Compatible with a wide voltage supply range: 1.8V to 5.5V

Battery backup operation from 1.3V to 5.5V

Product Advantages

Low timekeeping current of 1.2µA at 3.3V enhances battery life for portable devices

AEC-Q100 qualification makes it suitable for automotive applications

Wide operating temperature range from -40°C to 85°C

The compact 8-WFDFN exposed pad and 8-TDFN (2x3) package options for flexible PCB designs

Key Technical Parameters

Supply Voltage: 1.8V 5.5V

Supply Voltage for Battery: 1.3V 5.5V

Timekeeping current: Max 1.2µA @ 3.3V

Operating Temperature: -40°C to 85°C

Mounting Type: Surface Mount

Automotive Grade, AEC-Q100 Qualified

Quality and Safety Features

Stable timekeeping across the specified voltage and temperature ranges

Manufactured and tested under strict quality control standards

Compatibility

Easily interfaced with most microcontrollers via I2C protocol

Application Areas

Automotive systems

Portable electronics

Energy management

Consumer electronics

Industrial and medical devices

Product Lifecycle

This product is currently active with no near-term discontinuation date. Replacements or upgrades are provided as part of Microchip Technology's ongoing support.

Several Key Reasons to Choose This Product

Versatile power supply and low power consumption suitable for battery-operated devices

Comprehensive timekeeping features including alarm and leap year compensation

High reliability and quality assurance with AEC-Q100 automotive qualification

Wide operating temperature range suits harsh environment applications

Simple integration with existing designs thanks to its compact footprint and I2C interface