MBM29F400TC-70PFTN

Memory IC Overview

The MBM29F400TC-70PFTN is a 4 Megabit CMOS Flash memory device manufactured by Fujitsu. It is organized as 512K x 8 bits or 256K x 16 bits and operates on a single 5.0 V supply. The component features a maximum access time of 70 ns, enabling high-speed microprocessor operation without wait states. It utilizes embedded erase and program algorithms to eliminate the need for external programming voltage. The device supports sector erase architecture with top boot code sectors and includes data polling and toggle bit features for cycle detection.

Memory IC Feature Summary

• Single 5.0 V power supply requirement for read, write, and erase operations
• Compatible with JEDEC-standard commands and worldwide pinouts
• Supports in-system programming using standard system voltage
• Features embedded erase and program algorithms for automated execution

Memory IC Applications

• High-performance microprocessor systems requiring fast access times
• Storage for boot code in embedded applications
• General-purpose non-volatile data storage in consumer electronics
• Industrial control systems utilizing sector erase capabilities

Memory IC Procurement Notes

Verify the specific suffix 'C' against official Fujitsu documentation to confirm exact electrical characteristics and package orientation. Ensure the 'PFTN' designation matches the required normal bend type for TSOP-32 mounting. Cross-reference the manufacturer history, as Fujitsu semiconductor assets were acquired by Spansion and subsequently Micron. Confirm RoHS compliance status through current datasheets rather than assuming legacy specifications.

Memory IC Selection Notes

Select this component when a 4 Mbit capacity with 70 ns access speed is required for 5 V logic systems. The top boot sector configuration makes it suitable for firmware storage where code execution from the start of memory is necessary. Compare against the MBM29F800TA series if higher density is needed, noting that the 8 Mbit version shares similar command sets but differs in organization and sector sizes. Ensure the design accommodates the TSOP-32 package dimensions.

Memory IC Part Context

This part belongs to the MBM29F series of 5 V-only Flash memories. It is functionally related to the MBM29F800TA, which offers 8 Mbit density, and the MBM29F400BA, which features bottom boot sectors. The 'C' variant typically denotes specific timing or temperature grades within the family. These devices are designed to replace EPROMs in existing designs due to their compatibility with standard software commands.

Memory IC Replacement Considerations

The MBM29F400BC-70PFTN serves as a direct alternative with identical specifications but utilizes a bottom boot sector architecture instead of top boot. Other compatible parts include the MBM29F800TA series for increased density, provided the memory map differences are accounted for in the firmware.