47L04-I/ST

Overview

The Microchip Technology 47L04-I/ST is a 4-kbit synchronous Electrically Erasable RAM (EERAM) device organized as 512K words by 8 bits. It operates within a supply voltage range of 2.7 V to 3.6 V and supports an I²C interface with a maximum clock frequency of 1 MHz. The component features a 400 ns access time and draws a maximum power supply current of 400 µA. Designed for industrial applications, it functions reliably between -40 °C and +85 °C. The device is housed in an 8-pin Thin Shrink Small Outline Package (TSSOP).

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.
• Operates on low voltage supplies ranging from 2.7 V to 3.6 V.
• Provides rapid data retention without requiring external backup batteries.

Applications

• Industrial sensor data logging systems.
• Configuration storage in embedded controllers.
• Non-volatile parameter retention in battery-powered devices.

Procurement Notes

Verify the specific suffix 'I/ST' to confirm the industrial temperature grade (-40°C to +85°C) and surface-mount TSSOP-8 package. Ensure the design accommodates the 2.7V to 3.6V operating voltage range. Confirm that the I²C bus timing requirements align with the 1 MHz maximum clock specification before finalizing procurement.

Selection Notes

Select this component when a small, fast, non-volatile memory solution is required for I²C-based designs. It serves as a direct replacement for traditional EEPROMs where write endurance and speed are critical. Consider the 512K x 8 organization for applications needing granular data storage. Verify that the system voltage matches the 2.7V to 3.6V operational limits.

Part Context

The 47L04 belongs to Microchip's 47Lxx series of serial EERAMs. This family integrates the performance of static RAM with the non-volatility of EEPROM. The 47L04 specifically offers 4-kbit capacity. It is part of a broader lineup including 16-kbit variants like the 47L16, providing scalable storage options for various embedded memory needs.

Replacement Considerations

The 47C04-I/ST is a confirmed substitute offering identical functionality but operating at a higher voltage range of 4.5V to 5.5V. Designers must verify voltage compatibility when substituting the 47C04 for the 47L04. Other family members like the 47L16 offer larger capacities but may not fit space-constrained designs.