24LC04B-I/SNG

Memory IC Overview

The Microchip Technology 24LC04B-I/SNG is a 4-Kbit (512 x 8) serial EEPROM featuring an I²C-compatible two-wire interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device utilizes an 8-lead SOIC package and functions across an industrial temperature range of -40°C to +85°C. Key electrical characteristics include a maximum access time of 900 ns, a page write time of 5 ms, and standby current of 5 µA at extended temperatures.

Memory IC Feature Summary

• Supports standard and fast-mode I²C communication protocols with Schmitt trigger inputs for noise suppression.
• Includes a 16-byte page write buffer to optimize data transfer efficiency.
• Features hardware write protection via the WP pin to secure memory contents.
• Provides high reliability with over one million erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Embedded systems requiring non-volatile storage for configuration parameters.
• Industrial control devices needing reliable data logging in harsh environments.
• Consumer electronics utilizing low-power memory for calibration data.
• Automotive modules requiring AEC-Q100 qualified components.

Memory IC Procurement Notes

Verify the specific suffix 'I/SNG' confirms the Industrial temperature grade (-40°C to +85°C) and SOIC-8 surface mount package. Confirm RoHS compliance status as per the latest datasheet revision. Ensure design-in compatibility with existing I²C bus voltage levels and pull-up resistor requirements before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a 4-Kbit capacity is required with strict industrial temperature constraints. The 2.5V minimum operating voltage distinguishes it from lower-voltage variants like the 24AA04. The SOIC-8 package is suitable for standard PCB layouts where space allows for through-hole or larger surface-mount footprints compared to MSOP or DFN options.

Memory IC Part Context

This part belongs to the 24XX04 family of serial EEPROMs, which also includes the 24AA04 and 24FC04. While sharing the same core architecture and interface, the 24LC04B variant is specifically optimized for 2.5V to 5.5V operation, unlike the 1.7V capable 24AA04. The 'I' designation indicates industrial temperature rating, while 'E' denotes extended temperature capability.

Memory IC Replacement Considerations

Direct functional substitutes within the same package and specification include the 24LC04BT-I/SNG (Extended Temperature). For broader compatibility, other members of the 24XX04 family such as the 24AA04T-I/SN or 24FC04T-I/SN may be considered if voltage ranges and speed requirements align with the application design.

Memory IC FAQ

How does the Write Protect (WP) pin function?

When the WP pin is tied to VCC, all write operations are inhibited, protecting the entire memory array. When tied to VSS, normal read and write operations are enabled.

What happens if a page write crosses a physical page boundary?

If a page write command attempts to cross a physical page boundary, the data wraps around to the beginning of the current page, overwriting previously stored data, rather than proceeding to the next page.

Can the A0, A1, and A2 pins be used for addressing?

No, these pins are not internally connected on the 24XX04 devices. They may be left floating or tied to either VSS or VCC without affecting device operation.