M34D64-WMN6T

Memory IC Overview

The M34D64-W is a 64 Kbit serial I²C bus EEPROM organized as 8192 x 8 bits. It operates on a single supply voltage of 2.5 to 5.5 V and supports the 400 kHz I²C protocol. The device features hardware write control for the top quarter of memory via the WC pin, byte and page write capabilities (up to 32 bytes), and random/sequential read modes. It includes enhanced ESD/latch-up protection, over 1,000,000 write cycles endurance, and more than 40-year data retention.

Memory IC Feature Summary

• Hardware write control protects the top quarter of memory from inadvertent writes via the WC pin
• Supports byte and page write operations with automatic address incrementing
• Includes power-on-reset circuitry to prevent inadvertent writes during power transitions
• Offers enhanced ESD and latch-up protection for robust operation

Memory IC Applications

• Data storage in industrial systems requiring write protection for critical parameters
• Consumer electronics needing non-volatile memory configuration storage
• Automotive applications utilizing hardware-controlled memory sectors for safety-critical data

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package type, as the datasheet indicates SO8N availability. Confirm RoHS compliance status through official STMicroelectronics documentation or authorized distributors. Ensure the procurement channel provides valid traceability for the ECOPACK® packaging. Cross-reference the part number with the latest revision history to confirm component specifications have not changed.

Memory IC Selection Notes

Select this component when hardware-enforced write protection for a specific memory segment is required. It is suitable for designs operating within the 2.5 V to 5.5 V supply range. Consider the 400 kHz I²C speed limit and the 32-byte page write constraint. Verify that the system can accommodate the open-drain SDA/SCL interface requirements and pull-up resistor configurations specified in the electrical characteristics.

Memory IC Part Context

This device belongs to the M34 series of serial EEPROMs from STMicroelectronics. It utilizes the standard I²C two-wire interface for communication. The M34D64-W specifically distinguishes itself by integrating a dedicated Write Control pin to manage access to the upper memory region, offering a security feature not present in all standard EEPROM variants.

Memory IC Replacement Considerations

Check for direct substitutes within the M34D64 family that may offer different package options or temperature ranges. Verify compatibility with existing I²C bus addressing schemes if replacing multiple devices on the same bus. Ensure any replacement maintains the same hardware write control functionality if sector protection is critical to the design.