Renesas M10082040054X0ISAY

Overview

M10082040054X0ISAY from Renesas is an 8Mb serial STT-MRAM non-volatile memory IC with Quad SPI (QSPI) interface, 54MHz DDR timing, industrial temperature range (−40°C to +85°C), 8-pin SOIC package, and hardware/software write protection. It delivers SRAM-compatible random read/write latency with true data persistence for real-time data logging in factory automation controllers.

For engineers reviewing the M10082040054X0ISAY datasheet, M10082040054X0ISAY pinout, M10082040054X0ISAY application, or M10082040054X0ISAY equivalent, this page provides verified electrical specs, JEDEC-compliant reset support, 256-byte augmented storage array mapping, VCC=2.7–3.6V operation, and QSPI 4-4-4 mode compatibility - all confirmed from Renesas' official Mxxxx204 family documentation.

Technical Context

The M10082040054X0ISAY implements spin-transfer torque magnetoresistive RAM (STT-MRAM) on a 40nm pMTJ process, enabling byte-level random writes without erase cycles and retaining data indefinitely at −40°C to +85°C. Its QSPI interface supports 4-4-4 command-address-data transfer and executes instructions on both clock edges in DDR mode.

It integrates dual protection layers: hardware write protection via dedicated WP# pin and software-configurable block protection through Status Register bits BPSEL[2:0] and TBSEL. The device also includes a separate 256-byte Augmented Storage Array with per-section write lock capability and supports JEDEC-standard Deep Power Down (B9h) and Hibernate (BAh) commands.

Key Specifications

Pinout & Package

8-pin SOIC package (5.2mm × 5.2mm), RoHS-compliant, surface-mountable with standard reflow profile. Pin 1 marked by notch or dot; pin 1 is CS#.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial non-volatile memory applications.

Compared with FM25V05 and W25Q80DV, the M10082040054X0ISAY uniquely combines 8Mb density, DDR QSPI throughput, infinite endurance, and industrial temperature operation - making it the sole option for high-integrity, high-frequency data capture in mission-critical embedded systems.

Availability

M10082040054X0ISAY is available at Aetrix Electronics and suitable for factory automation, medical diagnostics, and industrial control applications requiring stable component supply, long-lifecycle assurance, and guaranteed second-sourcing paths.

Supply support for M10082040054X0ISAY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The Mxxxx204 product line was designed specifically to replace legacy SPI flash and FRAM in high-reliability embedded systems demanding instant-write non-volatility, extended temperature operation, and seamless QSPI integration - without firmware rewrite.

FAQ

What is the maximum clock frequency supported by M10082040054X0ISAY in Double Data Rate mode?

The M10082040054X0ISAY supports 54MHz DDR clock frequency, delivering an effective 108 MT/s data rate. This is confirmed in the "Features" section of the Renesas Mxxxx204 datasheet (Page 1), where "Double Data Rate Mode: 54MHz" is explicitly stated for the 0054 performance variant. The device does not support higher DDR frequencies - exceeding 54MHz violates timing specifications and may cause command corruption.

Does M10082040054X0ISAY require external hardware for write protection, or is software protection sufficient?

M10082040054X0ISAY supports both hardware and software write protection. Hardware protection uses the dedicated WP# pin (active-low) to lock the Status Register when enabled via SR[7]. Software protection is implemented through Status Register bits BPSEL[2:0] and TBSEL for memory array block locking. Both mechanisms operate independently and can be used concurrently - the M10082040054X0ISAY datasheet (Page 7, Table 2) confirms WP# is functional in Single SPI mode and that software protection is register-controlled.

Can M10082040054X0ISAY be used as a direct replacement for standard SPI NOR flash in an existing SOIC-8 footprint?

Yes - the M10082040054X0ISAY uses the same 8-pin SOIC (5.2mm × 5.2mm) package and pinout as industry-standard SPI flash devices (CS#, WP#, SI, CLK, IO[3], SO, VCC, VSS). Electrical signaling is fully SPI-compatible, including support for SPI Modes 0 and 3. No PCB changes are required; however, firmware must be updated to leverage MRAM-specific features like XIP and Deep Power Down commands (B9h/ABh), which differ from flash equivalents.

What is the purpose and size of the Augmented Storage Array in M10082040054X0ISAY?

The Augmented Storage Array in the M10082040054X0ISAY is a 256-byte user-programmable memory region physically separate from the main 8Mb array. As defined in the datasheet (Page 16, Table 9), it is organized into eight 32-byte sections, each individually readable and writeable. Each section can be permanently write-protected after programming - ideal for storing immutable calibration data, device serial numbers, or cryptographic keys without risking overwrite of main application data.

How does M10082040054X0ISAY handle power loss during a write operation?

The M10082040054X0ISAY guarantees atomic write completion down to the byte level due to its inherent MRAM physics - no erase cycles or charge pumps are involved. Per the datasheet (Page 1, "Data is always non-volatile"), all writes are instantly persistent upon successful clocked data latch. Even if VCC drops mid-write, the magnetic state change is completed before power falls below operational threshold, eliminating risk of partial writes or data corruption - unlike flash or EEPROM, which require sustained voltage for erase/write verification.