MB85RS256TYPNF-GS-BCERE1

Memory IC Overview

The MB85RS256TYPNF-GS-BCERE1 is a 256 Kbit Ferroelectric Random Access Memory (FeRAM) IC manufactured by RAMXEED. It features a 32 K x 8 bit organization and utilizes a Serial Peripheral Interface (SPI) compatible with modes 0 and 3. The device operates within a supply voltage range of 1.8 V to 3.6 V and supports maximum clock frequencies up to 40 MHz at higher voltages. Designed for automotive applications, it holds AEC-Q100 Grade 1 certification and functions reliably across an ambient temperature range of -40°C to +125°C. The component is housed in an 8-pin plastic SOP package.

Memory IC Feature Summary

• High endurance capability supporting 10^13 read/write operations per byte without requiring backup batteries.
• Fast write cycle times that eliminate the waiting periods associated with Flash memory or E2PROM technologies.
• Integrated block protection and write protect mechanisms controlled via status register bits and hardware pins.
• Low power consumption characteristics including standby and sleep modes to minimize energy usage.

Memory IC Applications

• Automotive electronic systems requiring high-temperature reliability and AEC-Q100 compliance.
• Data logging applications necessitating frequent write cycles and long-term data retention.
• Industrial control systems operating in harsh environments with wide temperature variations.

Memory IC Procurement Notes

Verify the specific ordering suffix to confirm the assembly site and shipping form, as RAMXEED offers variants such as tube or embossed carrier tape configurations. Ensure compatibility with moisture sensitivity level 3 requirements during storage and handling. Confirm that the selected packaging quantity aligns with production needs, noting that minimum shipping quantities may apply for certain forms. Cross-reference the datasheet version to ensure all electrical parameters match the design specifications.

Memory IC Selection Notes

Select this component when designing systems that demand high durability and fast non-volatile storage without battery support. The SPI interface allows for straightforward integration with microcontrollers supporting standard serial protocols. Consider the operating voltage range and temperature specifications to ensure suitability for the target environment. The AEC-Q100 qualification makes it appropriate for automotive-grade designs where reliability under stress is critical.

Memory IC Part Context

This FeRAM device is part of the MB85RS256TY series produced by RAMXEED Limited, formerly Fujitsu Semiconductor Memory Solutions Limited. The product line maintains original part numbering while transitioning manufacturing support. It represents a solution for non-volatile memory applications requiring superior endurance compared to traditional flash technologies. The series is engineered for robust performance in demanding industrial and automotive sectors.

Memory IC Replacement Considerations

Direct substitutes include other parts within the MB85RS256TY family, such as MB85RS256BPNF-G-JNERE1, though differences in operating temperature ranges must be verified. Check pinout compatibility and voltage specifications before swapping components. Ensure that any replacement maintains the required SPI mode support and package dimensions for physical fitment.

Memory IC FAQ

How does the hold operation function during active communication?

The HOLD pin allows interruption of serial input/output without deselecting the chip. When held low, SO becomes High-Z and SCK/SI inputs are ignored, preserving the command state until the pin returns high.

What is the mechanism for protecting the status register from writes?

Status register writing is protected by the WPEN bit combined with the WP pin level. Specific combinations of these signals can enable or disable write access to the nonvolatile bits within the status register.