47L04-I/SN

Overview

The Microchip Technology 47L04-I/SN is a 4-kbit Electrically Erasable RAM (EERAM) device utilizing I2C serial interface technology. It combines the speed and random access capabilities of SRAM with the non-volatility of EEPROM, organized as 512k words by 8 bits. The component operates within a supply voltage range of 2.7 V to 3.6 V, supporting a maximum clock frequency of 1 MHz and an access time of 400 ns. Designed for industrial applications, it functions reliably across a temperature range of -40°C to +125°C and is housed in an 8-pin SOIC surface-mount package.

Feature Summary

• Integrates SRAM performance with EEPROM non-volatility for instant data retention without backup power requirements
• Supports standard I2C two-wire serial communication protocol for simplified system integration
• Operates effectively across extended industrial temperature ranges up to +125°C

Applications

• Industrial control systems requiring persistent configuration storage
• Data logging applications needing frequent write cycles
• Embedded systems with limited board space for memory components

Procurement Notes

Verify the specific suffix 'I/SN' corresponds to the Industrial temperature grade (-40°C to +125°C) and SOIC-8 package variant. Confirm that the I2C address matches the target system design, as addresses may vary based on hardware pins. Ensure compatibility with the host controller's voltage levels and bus timing constraints before finalizing procurement orders.

Selection Notes

Select this component when a design requires high endurance writing combined with fast read speeds in a compact footprint. The I2C interface reduces pin count compared to parallel memories. Consider the 400 ns access time for system latency requirements. Verify that the 512k x 8 organization fits the application's data structure needs without excessive overhead.

Part Context

This part belongs to the Microchip 47L04 series of synchronous EERAM devices. The series offers a bridge between volatile and non-volatile memory technologies, eliminating the need for complex battery-backed circuits. The 47L04 specifically provides 4-kbit capacity, making it suitable for small-scale data storage tasks in microcontroller-based environments.

Replacement Considerations

Direct substitutes include other parts from the Microchip 47L04 family with compatible suffixes, such as 47L04-E/SN for commercial temperature grades or 47L04-I/ST for TSSOP packaging. Cross-brand replacements require careful verification of I2C timing parameters and physical pinout compatibility.