47L04T-I/ST

Overview

The Microchip Technology 47L04T-I/ST is a 4-kilobit (4Kbit) synchronous Electrically Erasable Random Access Memory (EERAM) device. It features a memory organization of 512 kilowords by 8 bits, accessed via an I2C interface with a maximum clock frequency of 1 MHz. The component operates within a supply voltage range of 2.7 V to 3.6 V and draws a maximum power current of 400 uA. It supports a write cycle time of 1 ms per word or page and has an access time of 400 ns. The device is housed in an 8-pin TSSOP package and is rated for industrial temperature operation from -40 °C to +85 °C.

Feature Summary

• Combines SRAM speed with EEPROM non-volatility using synchronous EERAM technology
• Supports standard I2C communication protocol with high-speed 1 MHz clock capability
• Provides low-power consumption suitable for battery-operated applications

Applications

• Industrial control systems requiring persistent data storage
• Consumer electronics needing configuration parameter retention
• Automotive modules operating in harsh thermal environments

Procurement Notes

Verify the specific suffix 'I/ST' confirms the industrial temperature grade (-40°C to +85°C) and TSSOP-8 surface mount package. Ensure compatibility with the host system's I2C bus voltage levels, as the device requires a 2.7V to 3.6V supply. Confirm that the synchronous nature of the interface aligns with the master controller's timing requirements for reliable data transfer.

Selection Notes

Select this component when non-volatile storage with SRAM-like performance is required in a small footprint. The 4Kbit capacity is ideal for storing calibration data or user settings. Consider the TSSOP package for space-constrained PCB designs. Verify that the 1 MHz I2C speed meets the system's data throughput needs compared to slower asynchronous alternatives.

Part Context

This part belongs to the Microchip 47L04 series of serial EERAM devices. The series integrates the endurance of EEPROM with the speed of SRAM, eliminating the need for complex wear-leveling algorithms typically required in flash-based solutions. The 'T' suffix indicates tape-and-reel packaging, while 'I' denotes the industrial temperature range.

Replacement Considerations

Direct substitutes include other parts within the Microchip 47L04 family, such as the 47L04-I/ST (tube packaging) or 47L04-E/SN (extended temperature). Cross-vendor replacements require careful verification of pinout compatibility, I2C address configurations, and electrical characteristics to ensure functional equivalence.