X28HC64J-90

Memory IC Overview

The X28HC64J-90 is a 64-kbit (8k x 8) electrically erasable programmable read-only memory (EEPROM) manufactured by Renesas Electronics Corporation. It utilizes CMOS technology and operates on a single 5V supply with a voltage range of 4.5V to 5.5V. The device features a parallel interface and offers an access time of 90 nanoseconds. It is housed in a PLCC-32 package and supports byte-alterable operations without requiring external high voltages or complex programming algorithms.

Memory IC Feature Summary

• Supports 64-byte page write operations for efficient data programming
• Includes software data protection modes alongside hardware write protect capabilities
• Features DATA Polling and Toggle Bit Polling for early end-of-write detection

Memory IC Applications

• Industrial control systems requiring non-volatile data storage
• Consumer electronics utilizing standard RAM-compatible pinouts
• Embedded applications needing extended endurance and data retention

Memory IC Procurement Notes

Verify the specific suffix designation against official Renesas documentation to confirm exact speed grade and package variant, as generic part numbers may encompass multiple revisions. Ensure compliance with RoHS directives if lead-free versions are required for the target assembly process. Cross-reference the manufacturer's current lifecycle status to confirm availability for new designs.

Memory IC Selection Notes

Select this component when a JEDEC-approved byte-wide pinout compatible with industry-standard RAMs is necessary. It is suitable for designs requiring self-timed write cycles and low power consumption with maximum active currents of 40mA. Consider the 100-year data retention and 100,000-cycle endurance specifications for long-life applications.

Memory IC Part Context

This device belongs to the X28HC64 series of 5V-only EEPROMs fabricated using floating gate CMOS technology. The series is designed for applications demanding high reliability and simple operation. It eliminates the need for erase-before-write steps and overerase problems common in older memory technologies.

Memory IC Replacement Considerations

Check for X28HC64 variants with different access times (70ns, 120ns) or packaging options (SOICW) if physical footprint or speed requirements differ. Verify compatibility with other 64k-bit parallel EEPROMs from alternative manufacturers ensuring identical pinouts and voltage levels.