CAT28C256GI-15T

Memory IC Overview

The CAT28C256GI-15T is a 256 Kbit (32K x 8) CMOS Parallel EEPROM manufactured by onsemi. It operates at 5 V with a maximum access time of 150 ns and features self-timed write cycles up to 5 ms. The device supports hardware and software write protection, including DATA Polling and Toggle status bits for end-of-write detection. It offers 100,000 program/erase cycles and 100-year data retention. Operating temperature range is -40°C to +85°C. Active current is max 25 mA; standby is max 150 µA. Package is PLCC-32.

Memory IC Feature Summary

• Self-timed write cycle with auto-clear and power-up/down write protection
• Hardware and software write protection mechanisms
• DATA Polling and Toggle bit status signals for write completion
• Automatic page write operation supporting 1 to 64 bytes

Memory IC Applications

• In-system programming applications requiring simple interface
• Data storage in industrial control systems
• Configuration memory in automotive electronics
• General-purpose non-volatile data logging

Memory IC Procurement Notes

Verify the specific suffix 'G' indicates lead-free and halogen-free compliance per manufacturer documentation. Confirm the 'I' suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure the '15' speed grade matches system timing requirements of 150 ns access. Check for tape and reel packaging specifications if automated assembly is planned.

Memory IC Selection Notes

Select this component when a parallel interface is required for direct microcontroller connection without serial protocol overhead. The 150 ns access time suits moderate-speed applications. Consider the PLCC-32 package constraints for PCB layout. Evaluate the need for page write capabilities versus byte-only writes to optimize programming efficiency.

Memory IC Part Context

This part belongs to the CAT28C256 family of 256 Kbit parallel EEPROMs from onsemi. Variants differ by access speed (120 ns or 150 ns), package type (PLCC, PDIP, TSOP), and temperature rating (Commercial, Industrial, Automotive). The 'G' suffix denotes environmental compliance, while 'I' specifies industrial grade.

Memory IC Replacement Considerations

CAT28C256NI-15T: Same capacity and speed but commercial temperature range. CAT28C256N-12T: Faster 120 ns access time. CAT28C256GI-12T: Lead-free package with faster 120 ns access. Verify pin compatibility and electrical characteristics before substitution.