24LC04BT-I/ST

Memory IC Overview

The Microchip Technology 24LC04BT-I/ST 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, with a maximum access time of 900 ns. The device utilizes an 8-lead TSSOP package and is rated for industrial temperatures from -40°C to +85°C. Key electrical characteristics include a standby current of 5 µA maximum and an operating write current of 3 mA maximum.

Memory IC Feature Summary

• Supports page write operations with a 16-byte on-chip buffer to enhance bus throughput efficiency.
• Includes hardware write protection via the WP pin to inhibit memory writes when tied to VCC.
• Features Schmitt trigger inputs and noise suppression filters on SDA and SCL lines for reliable operation in noisy environments.

Memory IC Applications

• Embedded systems requiring persistent storage for configuration parameters.
• Device calibration data retention in industrial control units.
• Firmware version tracking and logging in microcontroller-based designs.

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' confirms the Industrial temperature grade (-40°C to +85°C) and TSSOP-8 packaging. Confirm RoHS compliance status as required by project specifications. Ensure the ordering quantity matches available reel or cut-tape options provided by distributors. Cross-reference the datasheet revision date to ensure compatibility with latest electrical specifications.

Memory IC Selection Notes

Select this component when a low-pin-count non-volatile memory solution is needed for small data sets. The 24LC04B variant specifically requires a minimum supply voltage of 2.5V, distinguishing it from the 24AA04 which supports 1.7V. Consider the 16-byte page buffer for applications requiring frequent small writes to reduce internal programming cycle overhead.

Memory IC Part Context

This part belongs to the 24XX04 family of 4-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA04 and 24FC04, differentiated primarily by operating voltage ranges and maximum clock speeds. The 24LC04B series is optimized for standard 2.5V to 5.5V logic systems.

Memory IC Replacement Considerations

Direct substitutes within the same package and specification include the 24LC04BT-I/SN (SOIC-8) or 24LC04BT-I/MS (MSOP-8). Verify that any replacement maintains the 2.5V minimum voltage requirement and 400 kHz interface speed.

Memory IC FAQ

How does the A0, A1, and A2 pin configuration affect addressing?

For the 24LC04B device, pins A0, A1, and A2 are not internally connected. They may be left floating or tied to VSS or VCC without affecting the device's client address, which relies on the B0 bit in the control byte for block selection.

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

If a page write command attempts to write across 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.