MB85RS4MLYPN-GS-AWEWE1

Memory IC Overview

The MB85RS4MLYPN-GS-AWEWE1 is a 4Mbit (512 K x 8) ferroelectric random access memory (FeRAM) chip compliant with AEC-Q100 standards. It utilizes a Serial Peripheral Interface (SPI) supporting modes 0 and 3, with a maximum operating frequency of 50 MHz. The device operates within a supply voltage range of 1.7 V to 1.95 V and functions across an ambient temperature range of -40°C to +125°C. It features high endurance of 10^13 read/write operations per byte and includes a unique 64-bit serial number. Data retention is specified at 50.4 years at +85°C, 13.7 years at +105°C, and over 4.2 years at +125°C.

Memory IC Feature Summary

• AEC-Q100 automotive qualification for high-temperature reliability
• Special sector region ensuring data stability after three JEDEC MSL-3 reflow cycles
• Integrated 64-bit unique serial number stable through reflow processes
• Non-destructive write capability eliminating wait times associated with Flash or EEPROM

Memory IC Applications

• Automotive information recording systems requiring frequent data logging
• High-temperature industrial environments demanding long-term data retention
• Applications necessitating battery-free non-volatile storage with high write endurance
• Systems utilizing SPI microcontrollers for slave memory expansion

Memory IC Procurement Notes

Verify the specific ordering suffix PN-GS-AWEWE1 against official RAMXEED documentation to confirm the embossed carrier tape shipping form and minimum quantity requirements. Ensure design compatibility with the narrow 1.7 V to 1.95 V operating voltage range rather than standard 3.3 V or 5 V rails. Confirm that the 8-pin plastic DFN package dimensions align with the target PCB footprint constraints.

Memory IC Selection Notes

Select this component when the application requires extreme write endurance exceeding 10^13 cycles, which surpasses typical Flash or EEPROM capabilities. The narrow 1.7 V to 1.95 V supply voltage requirement distinguishes it from wider voltage variants. The inclusion of a special sector and unique ID makes it suitable for secure automotive identification and calibration data storage where reflow stability is critical.

Memory IC Part Context

This part belongs to the MB85RS4MLY family of SPI FeRAM devices manufactured by RAMXEED Limited, formerly Fujitsu Semiconductor Memory Solutions Limited. The series is designed specifically for automotive and high-reliability applications, offering non-volatile memory without the complexity of charge pumps required by Flash technologies. The product maintains original Fujitsu part numbering conventions while transitioning under the new corporate identity.

Memory IC Replacement Considerations

Direct replacements must match the 4Mbit capacity, SPI interface, and 1.7 V to 1.95 V voltage range. Verify if alternative packages are available, as this model uses an 8-pin plastic DFN. Cross-reference AEC-Q100 compliance and special sector availability if automotive qualification is mandatory.