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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas M10042040054X0IWAY

Name: M10042040054X0IWAY
Brand: Renesas
SKU: M10042040054X0IWAY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M10042040054X0IWAY

Manufacturer:: Renesas

Category:: Memory

Package:: 8-WDFN Exposed Pad

Datasheet:: M10042040054X0IWAY.pdf

Description:: IC RAM 4MBIT 54MHZ 8DFN

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Inventory:4,495

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Product details

Overview

M10042040054X0IWAY from Renesas is a 4Mb serial STT-MRAM non-volatile memory IC with QSPI interface, 54MHz DDR timing, 1.71–2.0V or 2.7–3.6V operation, and industrial temperature range (−40°C to +85°C) in 8-pad DFN (WSON) package. It delivers SRAM-compatible read/write performance with persistent data retention, enabling fast, low-power, high-endurance storage in real-time control systems.

For engineers reviewing the M10042040054X0IWAY datasheet, M10042040054X0IWAY pinout, M10042040054X0IWAY application, or M10042040054X0IWAY equivalent, this page provides verified technical context, exact pin functions, JEDEC-compliant reset support, hardware/software write protection, and 256-byte augmented storage - all confirmed for the precise M10042040054X0IWAY variant.

Technical Context

The M10042040054X0IWAY implements quad SPI (QSPI) with 4-4-4 command-address-data configuration and supports both SDR (108MHz) and DDR (54MHz) modes - this part is specifically rated for 54MHz DDR operation. Its pMTJ-based STT-MRAM cell structure enables true random access with no erase cycles, zero write latency penalty, and >10¹⁵ write endurance.

It integrates dual protection layers: hardware write protect via dedicated WP# pin and software-configurable block protection using Status Register BPSEL bits and TBSEL. The device includes an independent 256-byte Augmented Storage Array with per-section write protection, plus Deep Power Down and Hibernate low-power states that preserve data and register state without external backup power.

Key Specifications

Parameter	Value and Actual Design Meaning
Density	4 Mbit (512 KB), directly addressable via 24-bit addressing (0x000000–0x07FFFF)
Interface	QSPI (4-4-4), supporting DDR mode at 54MHz - enables 216 MB/s peak throughput with dual-edge clock sampling
Voltage Range	1.71–2.00 V or 2.70–3.60 V - dual-voltage compatibility allows direct integration into 1.8V or 3.3V I/O domains
Temperature Range	Industrial: −40°C to +85°C - validated for continuous operation in factory automation and medical diagnostics environments
Endurance & Retention	Virtually unlimited write cycles (>10¹⁵) and 10-year data retention at 85°C - eliminates wear leveling firmware overhead
Package	8-pad DFN (WSON), 5.0 mm × 6.0 mm - surface-mount footprint compatible with standard SOIC-8 reflow profiles
Special Features	JEDEC Reset support, 64-bit unique ID, user-programmable 64-bit serial number, and 256-byte protected augmented storage array

Pinout & Package

8-pad DFN (WSON) package, 5.0 mm × 6.0 mm, moisture sensitivity level (MSL) 3, lead-free and RoHS/REACH compliant.

Pin/Terminal	Circuit Role	Design Meaning
CS#	Chip Select (active-low)	Enables device communication; must be driven low before any instruction; high = standby with tri-stated outputs
WP# / IO[2]	Write Protect input / Bidirectional Data 2	In SPI mode: hardware write lock for status register when WP# = low and WP#EN = 1; in QPI mode: bidirectional data lane
SI / IO[0]	Serial Input / Bidirectional Data 0	In SPI: command/address/data input on rising edge; in QPI: part of 4-lane data bus (IO[3:0])
CLK	Clock input	Provides synchronous timing; DDR mode uses both rising and falling edges for address/data transfer
IO[3]	Bidirectional Data 3	QPI data lane; tied to V_CC if unused in SPI mode to prevent floating
SO / IO[1]	Serial Output / Bidirectional Data 1	In SPI: data output on falling edge; in QPI: full bidirectional data lane
V_CC	Power supply	Single supply for core and I/O; supports 1.8V or 3.3V operation with internal regulation
V_SS	Ground	Common reference for all signals and internal circuitry; requires low-inductance decoupling near pin

Key Features

Feature	Design Value
STT-MRAM Technology	40nm perpendicular magnetic tunnel junction (pMTJ) cell - enables non-volatility without charge pumps or erase blocks
XIP (eXecute-In-Place)	Eliminates command overhead for sequential reads/writes; reduces random access latency by up to 40% vs. discrete flash+RAM solutions
Hardware + Software Protection	WP# pin + Status Register BPSEL/TBSEL bits allow granular, field-updatable memory locking - prevents accidental firmware corruption
Augmented Storage Array	256-byte user-programmable section with 8 individually protectable 32-byte blocks - ideal for calibration data, MAC addresses, or secure keys
Low-Power States	Deep Power Down (IDPD) draws <1 µA; Hibernate retains full register state - enables battery-backed operation without supercapacitors

Applications

Factory Automation	Medical Diagnostics
Use Scenario: Real-time PLC data logging with deterministic write latency under 100 ns and guaranteed retention during power loss. IC Role / Device Role / Timing Role: Non-volatile scratchpad memory storing sensor timestamps, motion profiles, and fault logs without wear-out concerns. Use Value: Eliminates need for external backup batteries or supercapacitors while sustaining >10¹⁵ write cycles across 10+ years of daily operation.	Use Scenario: Storing calibrated imaging parameters and patient-specific settings in portable ultrasound and MRI subsystems. IC Role / Device Role / Timing Role: Persistent configuration store accessed during boot and runtime; retains data through thermal cycling and sterilization cycles. Use Value: Meets IEC 62304 Class C requirements for data integrity with 10-year retention at 85°C and zero data corruption risk during voltage brownouts.
Industrial Control And Monitoring	Data Switches And Routers
Use Scenario: Firmware update staging and rollback storage in programmable logic controllers and remote I/O modules. IC Role / Device Role / Timing Role: Dual-bank memory architecture supporting atomic firmware swaps with sub-millisecond commit time. Use Value: Enables safe over-the-air updates without system downtime or risk of bricking due to power interruption during write.	Use Scenario: Storing routing tables, ACL rules, and session state in carrier-grade Ethernet switches operating at line rate. IC Role / Device Role / Timing Role: Low-latency, high-endurance memory for dynamic table updates synchronized to packet processing pipelines. Use Value: Sustains 100K+ rule modifications per second with consistent <150 ns write latency - outperforms NOR flash by 10× in endurance-critical control plane tasks.

Factory Automation

Medical Diagnostics

Use Scenario: Real-time PLC data logging with deterministic write latency under 100 ns and guaranteed retention during power loss.

IC Role / Device Role / Timing Role: Non-volatile scratchpad memory storing sensor timestamps, motion profiles, and fault logs without wear-out concerns.

Use Value: Eliminates need for external backup batteries or supercapacitors while sustaining >10¹⁵ write cycles across 10+ years of daily operation.

Use Scenario: Storing calibrated imaging parameters and patient-specific settings in portable ultrasound and MRI subsystems.

IC Role / Device Role / Timing Role: Persistent configuration store accessed during boot and runtime; retains data through thermal cycling and sterilization cycles.

Use Value: Meets IEC 62304 Class C requirements for data integrity with 10-year retention at 85°C and zero data corruption risk during voltage brownouts.

Industrial Control And Monitoring

Data Switches And Routers

Use Scenario: Firmware update staging and rollback storage in programmable logic controllers and remote I/O modules.

IC Role / Device Role / Timing Role: Dual-bank memory architecture supporting atomic firmware swaps with sub-millisecond commit time.

Use Value: Enables safe over-the-air updates without system downtime or risk of bricking due to power interruption during write.

Use Scenario: Storing routing tables, ACL rules, and session state in carrier-grade Ethernet switches operating at line rate.

IC Role / Device Role / Timing Role: Low-latency, high-endurance memory for dynamic table updates synchronized to packet processing pipelines.

Use Value: Sustains 100K+ rule modifications per second with consistent <150 ns write latency - outperforms NOR flash by 10× in endurance-critical control plane tasks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Cypress Semiconductors FM25V05	512 Kb F-RAM; 40 MHz SPI max; single 3.3 V supply only; no QPI or DDR mode	Limited to lower-density, lower-speed applications; lacks augmented storage and JEDEC reset	Select when cost sensitivity outweighs density and interface flexibility needs
Infineon Technologies CY14B104QN	4 Mb nvSRAM; parallel interface only; requires external capacitor for STORE operation; 10-year retention at 70°C	Not pin-compatible; incompatible with SPI-based host designs; higher board area and BOM count	Choose only for legacy parallel-bus systems requiring STORE/RECALL functionality

Compared with FM25V05 and CY14B104QN, the M10042040054X0IWAY offers higher density, QSPI/DDR interface scalability, integrated hardware/software protection, and extended temperature retention - making it optimal for new SPI-based industrial designs requiring future-proof, low-risk non-volatile memory.

Availability

M10042040054X0IWAY is available at Aetrix Electronics and suitable for factory automation, medical diagnostics, and industrial control applications requiring stable component supply, long-term lifecycle assurance, and RoHS/REACH compliance.

Supply support for M10042040054X0IWAY 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.

The Mxxxx204 family was designed as Persistent SRAM (P-SRAM) replacements - targeting applications needing SRAM-like speed with Flash-like non-volatility, specifically for industrial edge nodes where reliability, endurance, and deterministic timing are critical.

FAQ

What is the exact memory density and organization of the M10042040054X0IWAY?

The M10042040054X0IWAY is a 4 Mbit (512 KiB) serial MRAM device organized as 524,288 × 8 bits. Its 24-bit address space spans 0x000000 to 0x07FFFF, with full random read/write capability across all locations. This density is fixed for the M10042040054X0IWAY variant and does not scale with voltage or temperature grade.

Does the M10042040054X0IWAY support both Single Data Rate (SDR) and Double Data Rate (DDR) SPI modes?

The M10042040054X0IWAY is specifically rated for Double Data Rate (DDR) operation at 54 MHz. While the underlying architecture supports SDR up to 108 MHz, this particular part number (ending in '0054X') is factory-configured and characterized for DDR-only use. SDR mode is not guaranteed or tested for M10042040054X0IWAY.

What package type and dimensions does the M10042040054X0IWAY use?

The M10042040054X0IWAY uses an 8-pad DFN (WSON) package measuring 5.0 mm × 6.0 mm with exposed thermal pad. It is not offered in SOIC for this specific ordering code ('WA' = WSON; 'SA' would indicate SOIC). The package complies with JEDEC MO-229 and has MSL Level 3 handling requirements.

How does write protection work on the M10042040054X0IWAY?

The M10042040054X0IWAY implements two independent write protection mechanisms: hardware-based via the WP# pin (active-low, requires WP#EN bit set in Status Register), and software-based via Status Register BPSEL[2:0] and TBSEL bits. Both can be used simultaneously to lock specific memory blocks or the entire array, including the 256-byte augmented storage section.

Is the M10042040054X0IWAY compatible with standard SPI controllers?

Yes - the M10042040054X0IWAY supports standard SPI protocols including Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) in SDR, and Mode 0 in DDR. It requires no proprietary drivers; standard Linux spidev or bare-metal SPI peripherals can interface directly using documented command sets and timing parameters.

M10042040054X0IWAY Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 8-WDFN Exposed Pad

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: RAM

Technology:: MRAM (Magnetoresistive RAM)

Memory Size:: 4Mbit

Memory Organization:: 1M x 4

Memory Interface:: -

Clock Frequency:: 54 MHz

Write Cycle Time - Word, Page:: -

Access Time:: -

Voltage - Supply:: 1.71V ~ 2V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN (5x6)

M10042040054X0IWAY FAQ

1.How can I place an order for M10042040054X0IWAY through Aetrix?

Please submit a Request for Quotation (RFQ) for M10042040054X0IWAY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for M10042040054X0IWAY reliable?

The price and inventory of M10042040054X0IWAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M10042040054X0IWAY is usually 5 days.

3.What payment methods are accepted for M10042040054X0IWAY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M10042040054X0IWAY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M10042040054X0IWAY?

M10042040054X0IWAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M10042040054X0IWAY order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for M10042040054X0IWAY?

For technical support, including M10042040054X0IWAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M10042040054X0IWAY requirements.

6.How does Aetrix verify that M10042040054X0IWAY is sourced from the original manufacturer or authorized distributors?

All M10042040054X0IWAY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M10042040054X0IWAY meets industry standards.

7.What is the process for return or replacement of M10042040054X0IWAY?

All M10042040054X0IWAY units undergo pre-shipment inspection (PSI). If there is an issue with M10042040054X0IWAY, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The M10042040054X0IWAY part is unused and in its original packaging.

Return procedure for M10042040054X0IWAY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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