MB85RQ4MLPF-G-BCERE1

Memory IC Overview

The MB85RQ4MLPF-G-BCERE1 is a 4 Mbit (512 K x 8) Ferroelectric Random Access Memory (FeRAM) IC manufactured by RAMXEED. It utilizes a Quad Serial Peripheral Interface (Quad SPI) to achieve high bandwidth data transfer rates up to 54 MB/s using four bidirectional I/O pins. The device operates on a single power supply voltage ranging from 1.7 V to 1.95 V and supports an operating frequency of up to 108 MHz for most commands, excluding standard READ operations which are limited to 40 MHz. Encased in a 16-pin plastic Small Outline Package (SOP), it offers nonvolatile data retention without backup batteries and provides high endurance with 10^13 read/write cycles per byte.

Memory IC Feature Summary

• Supports Quad SPI interface with XIP mode for direct execution-in-place capabilities
• High endurance rating of 10^13 read/write operations per byte
• Nonvolatile memory cells retain data without requiring backup power supplies
• Configurable block protection and write protect mechanisms via status register

Memory IC Applications

• Networking equipment requiring fast data logging
• Industrial computing systems needing high cycle reliability
• RAID controllers for persistent storage applications
• Gaming hardware utilizing high-bandwidth memory access

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package and tape/reel configuration. Confirm that the system power supply strictly adheres to the 1.7 V to 1.95 V range, as this component does not support wider voltage tolerances like 3.3 V or 5 V variants. Ensure ESD precautions are taken during handling due to moisture sensitivity classification.

Memory IC Selection Notes

Select this part when high-speed Quad SPI communication and extreme write endurance are prioritized over standard SPI interfaces. Note that the operating voltage is restricted to the 1.7 V–1.95 V range; designs requiring 3.3 V or 5 V operation must select alternative models from the MB85RS or MB85RC series. Verify compatibility with the host controller's ability to handle 108 MHz clock frequencies for optimal performance.

Memory IC Part Context

This component belongs to the MB85RQ4ML family of FeRAM devices produced by RAMXEED, formerly Fujitsu Semiconductor Memory Solutions Limited. The manufacturer continues to support existing products while maintaining original part numbering conventions. This specific variant integrates the Quad SPI interface within a 16-pin SOP package, distinguishing it from standard SPI or parallel interface versions in the broader memory portfolio.

Memory IC Replacement Considerations

Direct replacements must match the 4 Mbit capacity, Quad SPI interface, and 1.7 V–1.95 V voltage range. Standard SPI-only FeRAMs may require firmware changes to accommodate single-bit I/O latency differences.