MT28F400B5SP-8 T

Memory IC Overview

The Micron MT28F400B5SP-8T is a 4Mb (512K x 8 or 256K x 16) Smart 5 boot block Flash memory. It features an 80ns access time and operates on a single 5V supply with VPP programming at 5V. The device utilizes a 0.18µm CMOS process and offers 100,000 erase cycle endurance. It includes a hardware-protected 16KB boot block, two 8KB parameter blocks, and four main memory blocks. The component is housed in a 44-pin SOP package.

Memory IC Feature Summary

• Hardware-protected boot block secured by super-voltage or write protect pin
• Smart 5 technology enabling 5V-only application and production programming
• Internal State Machine automating write and erase algorithms
• Selectable bus width for byte or word-wide operations

Memory IC Applications

• System firmware storage requiring code protection
• Low-level system recovery applications
• In-system programmable read-only memory designs

Memory IC Procurement Notes

Verify the specific suffix 'SP' corresponds to the 44-pin SOP package and 'T' indicates tape and reel packaging. Confirm the '-8' timing grade matches the required 80ns access speed. Ensure the 'B' or 'T' boot block configuration aligns with the target processor architecture requirements before procurement.

Memory IC Selection Notes

Select this component when a hardware-protected boot block is necessary for critical firmware security. The 5V-only operation simplifies power supply design compared to dual-supply alternatives. Consider the 44-pin SOP footprint for board layout constraints. Verify compatibility with existing command sets if migrating from older 0.3µm devices.

Memory IC Part Context

This part belongs to the MT28F004B5/MT28F400B5 family of Smart 5 Flash memories. It shares architectural similarities with the MT28F800B5 but offers lower density. The series is designed for embedded systems requiring reliable non-volatile storage with robust write protection mechanisms for boot code.

Memory IC Replacement Considerations

Direct replacements include other MT28F400B5 variants with different packages (WG, WP) or boot block positions (B suffix). Cross-generation upgrades may involve MT28EW series parts, though interface and voltage differences require circuit redesign.