CAT28F001G-12T

Memory IC Overview

The CAT28F001G-12T is a 1 Megabit (128K x 8) CMOS Boot Block Flash Memory manufactured by onsemi. It features a blocked architecture with an 8 KB boot block, two 4 KB parameter blocks, and a 112 KB main block. The device supports fast asynchronous read access times of 90 ns or 120 ns depending on the specific speed grade. It operates on a single 5V supply voltage ranging from 4.5 V to 5.5 V for read operations, while programming and erasing require a 12.0 V ± 5% supply on the VPP pin. The memory offers high endurance of 100,000 program/erase cycles and retains data for 10 years. It includes hardware data protection, deep power-down mode, and electronic signature capabilities.

Memory IC Feature Summary

• Blocked architecture with dedicated 8 KB boot block featuring write lock-out for secure code storage
• Embedded Write State Machine automates program and erase algorithms without external processor intervention
• Hardware data protection via boot block lockout and status register polling for error detection
• Deep power-down mode significantly reduces current consumption for low-power applications

Memory IC Applications

• In-system code updates for embedded systems
• Storage of secure boot code in microcontroller systems
• After-sale firmware upgrades for industrial equipment
• Parameter storage in automotive electronics

Memory IC Procurement Notes

Verify the exact suffix 'G-12T' against the official datasheet to confirm package type (PLCC-32) and temperature range. Confirm that the component meets RoHS requirements if applicable, as older batches may differ. Check for obsolescence status as this series has been superseded by newer generations. Ensure the supplier provides valid traceability documentation for critical applications.

Memory IC Selection Notes

Select this component when a protected boot block is required to prevent accidental overwriting of startup code. The PLCC-32 package is suitable for surface mount applications requiring robust mechanical stability. Consider the 120 ns access time for systems with moderate clock speeds. Verify that the system can provide the necessary 12V programming voltage or utilize appropriate level shifting circuits.

Memory IC Part Context

This part belongs to the CAT28F001 family of 1-Megabit Flash memories. It is a licensed second source for the Intel 28F001. The 'G' suffix typically denotes the PLCC-32 package, while '12' indicates the 120 ns access speed. The 'T' often refers to tape and reel packaging. This family is designed for general-purpose non-volatile storage where code integrity is critical.

Memory IC Replacement Considerations

Direct substitutes include the Intel 28F001J3-B75 and AMD Am29F001B. Verify pin compatibility and electrical characteristics before substitution. Newer alternatives from onsemi such as the CAT28F010 series offer higher density but may require software adaptation.