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MCP79410T-I/SN

MCHPMCP79410T-I/SN

Microchip Technology
Real Time Clock (RTC) IC Clock/Calendar 64B, 1Kb I2C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width)
Active30,740 in stock
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Overview

The MCP79410T-I/SN is a highly integrated Real-Time Clock and Calendar (RTCC) that includes 64 bytes of SRAM and 1Kb of EEPROM. It features automatic battery switchover for timekeeping during power loss and a power-fail timestamp that records the exact moment power was lost and restored.

Why Choose This Part

This IC offers a unique combination of volatile and non-volatile memory alongside RTCC functions, reducing component count. The integrated digital trimming allows for software-based accuracy compensation, while the wide 1.8V to 5.5V operating range ensures compatibility with both low-voltage battery systems and standard 5V rails.

Applications

Data Logging
Utilizing the 128 bytes of EEPROM and power-fail timestamps to log system events and sensor data with accurate time markers.
Smart Energy Meters
Maintaining accurate time for multi-tariff billing using the on-chip digital trimming for clock calibration.
White Goods
Providing scheduled operation and user clock displays in appliances with low standby power requirements.
Industrial Controllers
Ensuring system synchronization and event sequencing in environments where power stability may be inconsistent.

Key Specifications

Type Clock/Calendar
Features Alarm, Leap Year, Square Wave Output, SRAM, Unique ID
Interface I2C, 2-Wire Serial
Date Format YY-MM-DD-dd
Memory Size 64B, 1Kb
Time Format HH:MM:SS (12/24 hr)
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 1.8V ~ 5.5V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 8-SOIC
Voltage - Supply, Battery 1.3V ~ 5.5V
Current - Timekeeping (Max) 1.2uA @ 3.3V

Getting Started

Interface the device via the I2C bus using a standard 32.768 kHz crystal connected to the X1 and X2 pins. Implement a backup power source, such as a coin cell or supercapacitor, to the VBAT pin to enable the automatic power-fail switchover circuitry.

MCP7941 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
MCP79410T-I/SN (this part) SOIC-8 30,740
MCP79410T-I/MS TSSOP-8 9,289
MCP79411-I/MS TSSOP-8 5,683
Also available as: MCP79410-I/SN

Also Consider

DS1307 Analog Devices / Maxim Integrated - A widely used I2C RTC that is ideal for 5V systems requiring a simpler feature set without EEPROM.

Categories

Memory & Storage > EEPROM IoT & Smart Devices > IoT Security & Crypto