MCP7940N-I/P - Microchip Technology

Manufacturer Part Number

MCP7940N-I/P

Manufacturer

Microchip Technology

Introduction

Real-time clock/calendar optimized for low power consumption and precise timekeeping

Product Features and Performance

Alarm functionality

Leap year compensation

Square wave output

64 bytes of battery-backed SRAM

12/24 hour time format

YY-MM-DD-dd date format

I2C, 2-Wire Serial interface for communication

Wide voltage supply range from 1.8V to 5.5V

Battery voltage supply range from 1.3V to 5.5V

Maximum timekeeping current of 1.2µA at 3.3V

Product Advantages

Low power consumption for battery-powered applications

Integrated alarms for event-driven actions

Square wave output for external devices synchronization

SRAM for additional data storage

Simple integration with microcontroller systems via I2C

Operation across a broad range of voltages

Key Technical Parameters

Interface: I2C, 2-Wire Serial

Memory Size: 64B SRAM

Time Format: HH:MM:SS (12/24 hr)

Date Format: YY-MM-DD-dd

Voltage Supply: 1.8V to 5.5V

Voltage Supply, Battery: 1.3V to 5.5V

Current Timekeeping (Max): 1.2µA at 3.3V

Operating Temperature: -40°C to 85°C

Through Hole mounting

Quality and Safety Features

AEC-Q100 qualified for automotive applications

Compatibility

Compatible with I2C, 2-Wire Serial interfaced microcontrollers and systems

Application Areas

Automotive electronics

Industrial systems

Portable medical devices

Consumer electronics

Product Lifecycle

Product status: Active

Not nearing discontinuation

Replacements or upgrades available

Several Key Reasons to Choose This Product

Highly reliable with automotive-grade AEC-Q100 qualification

Flexible power supply options to accommodate varying design needs

Low power design ideal for battery-dependent operations

Additional memory storage with SRAM

Advanced timekeeping features including alarms and leap year handling

Easy firmware integration through industry-standard I2C protocol