MB85RS256TYPNF-G-AWERE2

Memory IC Overview

The MB85RS256TYPNF-G-AWERE2 is a 256Kbit (32 K x 8) Ferroelectric Random Access Memory (FeRAM) integrated circuit manufactured by RAMXEED. It utilizes the Serial Peripheral Interface (SPI) for communication, supporting SPI modes 0 and 3 with a maximum operating frequency of 33 MHz. The device operates within a supply voltage range of 1.8 V to 3.6 V and is designed for high-temperature environments, featuring an ambient temperature range from -40°C to +125°C. It offers high endurance of 10^13 read/write operations per byte and data retention exceeding 3.38 years at +125°C. The component is housed in an 8-pin plastic SOP package.

Memory IC Feature Summary

• Nonvolatile memory architecture utilizing ferroelectric process technology eliminates the need for backup batteries.
• Serial Peripheral Interface (SPI) compatibility supports standard mode 0 and mode 3 configurations.
• High endurance capability allows for 10^13 read/write cycles per byte, surpassing traditional Flash and E2PROM limits.
• Integrated block protection and write protect mechanisms manage access via status register control bits.

Memory IC Applications

• Automotive electronic systems requiring operation in high-temperature environments up to +125°C.
• Industrial control applications needing frequent data logging without write latency.
• Embedded systems utilizing microcontrollers equipped with SPI ports for slave memory expansion.

Memory IC Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm assembly site and shipping form. The suffix indicates whether the unit is supplied in tubes or embossed carrier tape. Confirm moisture sensitivity level requirements and reflow soldering profiles prior to procurement to ensure compliance with handling standards.

Memory IC Selection Notes

Select this component when nonvolatile storage requires high-speed write performance without erase cycles. The SPI interface simplifies integration with standard microcontrollers. Ensure the design accommodates the 1.8 V to 3.6 V supply range and the 8-pin SOP footprint. Consider the high endurance rating for applications involving frequent data updates.

Memory IC Part Context

This part belongs to the MB85RS256TY series of FeRAM devices produced by RAMXEED Limited, formerly Fujitsu Semiconductor Memory Solutions Limited. The series maintains original Fujitsu part numbering conventions while continuing support for existing product lines. The device represents a specialized memory solution optimized for reliability and speed in demanding operational conditions.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Verify pinout and electrical specifications carefully if considering alternative FeRAM or SPI Flash components from other manufacturers.

Memory IC FAQ

What SPI modes does the MB85RS256TYPNF-G-AWERE2 support?

The device supports SPI mode 0 (CPOL=0, CPHA=0) and SPI mode 3 (CPOL=1, CPHA=1).

How is the hold operation managed during serial 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 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, the WP pin level, and the WEL latch state. Specific combinations of these signals determine if the register is writable or protected.