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MCP79410-I/SN

MCHPMCP79410-I/SN

Microchip Technology
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID
6,765 in stock
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Overview

The MCP79410-I/SN is a low-power Real-Time Clock and Calendar (RTCC) from Microchip that integrates 1Kb of EEPROM and 64 bytes of battery-backed SRAM. It features a versatile power management system that automatically switches to a backup battery during power loss, maintaining timekeeping with a low current draw of 1.2uA at 3.3V.

Why Choose This Part

This device offers a unique combination of high-density memory integration and digital trimming, allowing engineers to compensate for crystal frequency drift. Its wide operating voltage range of 1.8V to 5.5V and low timekeeping current make it ideal for battery-operated systems requiring a unique ID and reliable timekeeping.

Applications

Data Logging
Providing accurate timestamps for sensor data using the integrated SRAM for temporary buffering and EEPROM for non-volatile configuration storage.
Utility Metering
Utilizing the power-fail timestamp feature to log exactly when a device lost and regained main power.
Industrial Controllers
Implementing scheduled maintenance alerts or operation cycles using the dual programmable alarms and square wave output.

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

To evaluate this RTC, use the MCP79410 RTCC PICtail Plus Daughter Board (AC164140) which connects to Microchip Explorer development kits. Implementation requires a 32.768 kHz crystal and a standard I2C bus master to interface with the internal registers and memory blocks.

MCP7941 Family

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

Part Number Package Stock
MCP79410-I/SN (this part) SOIC-8 6,765
MCP79410T-I/SN SOIC-8 30,740
MCP79410T-I/MS TSSOP-8 9,289
MCP79411-I/MS TSSOP-8 5,683

Also Consider

DS1307 Analog Devices - A widely used 5V I2C RTC with 56 bytes of NV RAM, though it lacks the integrated EEPROM found in the MCP79410.