AT24C256C-SSHL-T

Overview

The AT24C256C-SSHL-T is a 256-Kbit (32,768 x 8) I²C-compatible serial EEPROM manufactured by Microchip Technology. It operates within a supply voltage range of 1.7V to 5.5V and supports clock frequencies up to 1 MHz in Fast Mode Plus at voltages between 2.5V and 5.5V. The device features a write-protect pin for hardware data protection, 64-byte page write mode with partial page writes allowed, and self-timed write cycles completing within 5 ms maximum. It is housed in an 8-lead SOIC package and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• I²C-compatible two-wire serial interface supporting Standard, Fast, and Fast Mode Plus speeds
• Hardware write-protect capability via the WP pin for full array protection
• High endurance rated for one million write cycles with 100-year data retention
• Supports up to eight devices on a single bus through dedicated address pins

Applications

• Industrial control systems requiring low-power non-volatile storage
• Commercial applications needing reliable parameter logging
• Embedded systems utilizing I²C communication protocols

Procurement Notes

Verify that the ordering suffix matches the required package type and tape/reel specifications. Confirm the specific revision level aligns with your design requirements. Ensure compatibility with the host controller's I²C voltage levels and pull-up resistor configurations before finalizing procurement orders.

Selection Notes

Select this component when a 256-Kbit capacity is required alongside strict low-voltage operation down to 1.7V. The 8-lead SOIC package is suitable for surface-mount assembly processes. Consider the Fast Mode Plus support if higher bus speeds are necessary within the specified voltage constraints.

Part Context

This part belongs to the AT24C256C series of serial EEPROMs from Microchip Technology. It shares architectural similarities with other members of the family but is distinguished by its specific 8-lead SOIC packaging and tape-and-reel delivery format. It serves as a non-volatile memory solution for embedded applications.

Replacement Considerations

Compatible substitutes include AT24C256C-SSHM-T and AT24C256C-XHL-B. Verify package dimensions and electrical characteristics match before substitution.

FAQ

How does the Write-Protect pin function?

Connecting the WP pin to VCC inhibits all write operations to the protected memory array. Connecting it to GND allows normal write operations.

What is the maximum clock frequency supported?

The device supports up to 1 MHz in Fast Mode Plus, provided the supply voltage is between 2.5V and 5.5V.