MB85RS256APNF-G-JNERE1

Memory IC Overview

The RAMXEED MB85RS256APNF-G-JNERE1 is a 256 Kbit (32 K × 8) Ferroelectric Random Access Memory (FRAM) integrated circuit. It utilizes the Serial Peripheral Interface (SPI) for communication, supporting maximum operating frequencies of 25 MHz. The device operates within a supply voltage range of 3.0 V to 3.6 V and functions reliably across an industrial temperature range of -40 °C to +85 °C. It features high endurance with 10^10 read/write cycles and retains data for at least 10 years at 55 °C without backup power.

Memory IC Feature Summary

• Non-volatile ferroelectric memory architecture eliminates the need for battery backup while providing rapid write speeds comparable to SRAM.
• Serial Peripheral Interface (SPI) compatibility supports Mode 0 and Mode 3 clock configurations for flexible microcontroller integration.
• High endurance capability allows up to 10 billion read/write operations, significantly exceeding standard Flash or EEPROM limitations.

Memory IC Applications

• Data logging systems requiring frequent updates
• Industrial control equipment needing reliable non-volatile storage
• Smart metering applications

Memory IC Procurement Notes

Verify the specific suffix JNERE1 indicates embossed carrier tape packaging when sourcing. Confirm RoHS compliance status as documented in the official datasheet. Ensure the operating environment remains within the specified 3.0 V to 3.6 V voltage range and -40 °C to +85 °C temperature limits to maintain guaranteed performance and data retention.

Memory IC Selection Notes

Select this component for designs prioritizing high write endurance over traditional flash technologies. The SPI interface simplifies PCB routing compared to parallel buses. Verify that the 3.0 V minimum supply voltage aligns with the system's power rails, as lower voltage options are not available in this specific part number configuration.

Memory IC Part Context

This FRAM chip belongs to the MB85RS256A series manufactured by RAMXEED. It serves as a drop-in replacement for legacy Fujitsu Semiconductor parts within the same family. The technology combines the speed of volatile memory with the non-volatility of flash, targeting applications where write latency and endurance are critical design constraints.

Memory IC Replacement Considerations

MB85RS256BPNF-G-JNERE1

Memory IC FAQ

Does the HOLD pin interrupt active commands?

Yes, asserting the HOLD pin low interrupts serial input/output without deselecting the chip, placing SO in a High-Z state while retaining the command context.

What is the data retention period?

The datasheet specifies a data retention capability of at least 10 years at an ambient temperature of 55 °C.