CAT28F020GI-90T

Memory IC Overview

The CAT28F020GI-90T is a 2 Megabit (256K x 8-bit) CMOS Flash memory manufactured by onsemi. It features a 32-pin PLCC package and supports asynchronous parallel interfaces with 90 ns access time. The device operates within a voltage range of 4.75 V to 5.5 V for VCC and requires 12.0 V ± 5% for VPP during programming and erasure. It offers high endurance of 100,000 program/erase cycles per byte and retains data for 10 years. The component supports commercial temperature ranges and includes internal stop timers for program and erase operations.

Memory IC Feature Summary

• Supports in-system and after-sale code updates via electrical erasure and reprogramming
• Compatible with standard EPROM and E2PROM pinouts and read timing
• Includes integrated address and data latches to free buses during write operations
• Features electronic signature identification using a two-write cycle scheme

Memory IC Applications

• In-system firmware updates
• After-sale code storage and modification
• Non-volatile code storage requiring frequent rewriting

Memory IC Procurement Notes

Verify the specific suffix 'G' confirms the lead-free and halogen-free PLCC package variant. Confirm the '-90' designation matches the required 90 ns access speed. Ensure the manufacturer source is recognized as onsemi or authorized distributor. Check for end-of-life status as this series may be discontinued.

Memory IC Selection Notes

Select this part when a 2 Mbit capacity with 8-bit width is required. Choose the 90 ns speed grade for faster read cycles compared to the 120 ns variant. Ensure the design accommodates the 12V VPP requirement for programming. Verify that the 32-pin PLCC footprint fits the PCB layout constraints.

Memory IC Part Context

This component belongs to the CAT28F020 family of 2 Megabit Flash memories. It is electrically compatible with JEDEC standard 28F020 devices. The product line includes variations in package types such as TSOP and DIP, and different speed grades like 120 ns. It utilizes advanced CMOS floating gate technology for reliability.

Memory IC Replacement Considerations

Direct substitutes include other 28F020-90 variants from different manufacturers that adhere to JEDEC standards. Cross-reference pinouts for PLCC packages to ensure compatibility. Verify voltage levels and command set alignment before substitution.