EM1344V143DL8A+

Overview

The EM1344V143DL8A+ is a real-time clock (RTC) and battery-backed SRAM device manufactured by Microchip Technology, formerly part of the Dallas Semiconductor portfolio. It integrates a low-power RTC with a crystal oscillator and a battery switch for continuous timekeeping during main power loss. The device includes 14 kilobits of battery-backed static RAM accessible via a standard I2C serial interface. It operates within a voltage range of 1.9 to 5.5 volts and supports industrial temperature ranges, ensuring reliable data retention and accurate time synchronization in embedded systems requiring persistent memory and clocking capabilities.

Feature Summary

• Integrates a real-time clock with calendar counters and a dedicated battery switch mechanism
• Provides 14-kilobit battery-backed static random-access memory for non-volatile data storage
• Communicates through a two-wire I2C serial interface compatible with multiple voltage levels
• Features an interrupt output pin configurable for periodic updates or alarm events

Applications

• Embedded systems requiring precise timekeeping and persistent data logging
• Industrial control units needing backup memory for configuration parameters
• Consumer electronics utilizing I2C buses for system management functions
• Automotive infotainment systems requiring clock synchronization and event recording

Procurement Notes

Verify the specific suffix designation against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure the I2C address matches the system design requirements. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Check for any recent obsolescence notices or lifecycle changes from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when both real-time clock functionality and substantial battery-backed storage are required on a single chip. It is suitable for designs where space constraints prevent separate RTC and EEPROM components. Consider the I2C bus speed limitations and voltage compatibility with the host microcontroller. Evaluate the power consumption characteristics relative to the system's sleep modes and active duty cycles.

Part Context

This device belongs to the class of integrated real-time clocks with battery-backed memory, originally developed under the Dallas Semiconductor brand and now managed by Microchip Technology. These components are widely used in legacy and modern embedded designs to replace discrete clock and memory solutions. The family is known for its robust data retention capabilities and simple serial interface integration, serving as a standard solution for time-stamping and configuration storage in various electronic applications.

Replacement Considerations

Direct replacements include other I2C-based RTCs with comparable SRAM sizes, such as the DS1344 series variants. Verify pinout compatibility and register mapping when substituting with similar devices from different manufacturers. Ensure the alternative component supports the same voltage range and temperature specifications required by the original design.