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See Technical Specifications

MCP7940NT-I/SN

Battery-Backed I2C Real-Time Clock/Calendar with SRAM

Manufacturer:

Microchip
Mfr.Part #:

MCP7940NT-I/SN
Datasheet:

MCP7940NT-I/SN Datasheet (PDF)
RTC Bus Interface:

Serial, 2-Wire, I2C
Date Format:

YY-MM-DD-dd
Time Format:

HH:MM:SS (12 hr, 24 hr)
RTC Memory Size:

64 B
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MCP7940NT-I/SN General Description

The MCP7940NT-I/SN is a real-time clock (RTC) with EEPROM memory designed by Microchip Technology. This RTC IC operates on low power consumption, making it ideal for use in battery-powered devices. It features a clock calendar with alarm functions, automatic leap year adjustment, power-fail timestamp, and a watchdog timer.The MCP7940NT-I/SN has 64 bytes of EEPROM memory for storing user data and settings. It communicates with the host system via an I2C interface, allowing for easy integration into various applications. The programmable square-wave output can be used for timing or synchronization purposes.This RTC IC is housed in a small 8-pin SOIC package, making it suitable for space-constrained designs. It operates over a wide voltage range of 1.8V to 5.5V, ensuring compatibility with different power supplies.

Key Features

Real-time clock/calendar with battery backup

SRAM for clock and alarm settings

I2C interface for communication

Configurable output frequency

Power-fail timestamp

Automatic leap year compensation

Time-stamp event marker

64 bytes of non-volatile SRAM

Low power consumption

0. Wide operating voltage range

Application

The MCP7940NT-I/SN is a Real-Time Clock/Calendar (RTCC) IC that can be used in various applications including: time-keeping in consumer electronics, industrial automation systems, data logging devices, medical equipment, and security systems

It is also commonly used in IoT devices, wearables, and automotive applications

Specifications

Product Category	Real Time Clock	RTC Bus Interface	Serial, 2-Wire, I2C
Date Format	YY-MM-DD-dd	Time Format	HH:MM:SS (12 hr, 24 hr)
RTC Memory Size	64 B	Battery Backup Switching	Backup Switching
Supply Voltage - Min	1.8 V	Supply Voltage - Max	5.5 V
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT	Function	Alarm, Calendar, Clock
Moisture Sensitive	Yes	Product Type	Real Time Clocks
Factory Pack Quantity	3300	Subcategory	Clock & Timer ICs
Unit Weight	0.008113 oz