Renesas M30042040054X0IWAY

Overview

M30042040054X0IWAY 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 supply, industrial temperature range (−40°C to +85°C), and 8-pad DFN (WSON) package. It delivers SRAM-compatible read/write performance with persistent data retention for real-time data logging in factory automation controllers.

For engineers reviewing the M30042040054X0IWAY datasheet, M30042040054X0IWAY pinout, M30042040054X0IWAY application, or M30042040054X0IWAY equivalent, this page provides verified technical context, pin-level design meaning, JEDEC-compliant reset support, hardware/software write protection, and 256-byte augmented storage array configuration details essential for deterministic embedded firmware integration.

Technical Context

The M30042040054X0IWAY implements a 40nm pMTJ spin-transfer torque MRAM array with true random-access reads/writes and no write latency penalty. Its QSPI interface supports 1-4-4 command-address-data nomenclature and operates in Double Data Rate mode at 54MHz using both clock edges for address/data transfer.

It integrates dual power domains (1.8V/3.0V), hardware write protection via WP# pin, software-configurable block protection (BPSEL[2:0]), top/bottom memory locking (TBSEL), and a dedicated 256-byte user-programmable augmented storage array with per-section write lock. All registers-including Status, Configuration, Unique ID, and Serial Number-are mapped to fixed 24-bit addresses outside main memory space.

Key Specifications

Pinout & Package

8-pad DFN (WSON) package, 5.0mm × 6.0mm body, exposed thermal pad, RoHS-compliant matte tin finish. Pin 1 marked by dot or bevelled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V04-G and CY14V104N-ZSP25XI, the M30042040054X0IWAY offers higher bandwidth (54MHz DDR vs. 40/25MHz), broader voltage support (1.8V/3.3V), superior endurance (>10¹⁵ vs. 10¹⁴/10¹²), and integrated features like augmented storage and JEDEC reset-making it optimal for next-generation deterministic industrial edge nodes.

Availability

M30042040054X0IWAY 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-compliant sourcing.

Supply support for M30042040054X0IWAY 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 automotive, industrial, and infrastructure markets.

The Mxxxx204 family is designed as Persistent SRAM (P-SRAM) replacements-delivering SRAM-like performance with Flash-like non-volatility for mission-critical industrial and medical systems demanding zero-latency writes and multi-decade data retention.

FAQ

What voltage ranges does the M30042040054X0IWAY support?

The M30042040054X0IWAY supports two independent supply ranges: 1.71V to 2.00V for 1.8V systems and 2.70V to 3.60V for 3.3V systems. It does not operate across the 2.0–2.7V gap. Each range is fully characterized for timing, endurance, and retention. The M30042040054X0IWAY must be powered within one of these specified windows-mixing voltages or operating outside them violates absolute maximum ratings and may cause functional failure.

Does the M30042040054X0IWAY require an external capacitor for data retention?

No, the M30042040054X0IWAY requires no external capacitor for data retention. As a magnetoresistive RAM, it stores data via magnetic tunnel junction orientation, which is inherently non-volatile and immune to power loss. Unlike nvSRAM devices, the M30042040054X0IWAY retains all data-including register configurations and augmented storage contents-immediately upon VCC removal, with no store cycle or backup power dependency.

How is write protection implemented on the M30042040054X0IWAY?

The M30042040054X0IWAY implements dual-layer write protection: hardware-based via the WP# pin (active-low, enabled by SR[7]=1), and software-based via status register bits TBSEL and BPSEL[2:0] for top/bottom and block-level memory locking. Both mechanisms can be used simultaneously-the WP# pin protects the status register itself, while software bits protect memory regions. The M30042040054X0IWAY also supports write protection of the 256-byte augmented storage array on a per-32-byte section basis.

What is the purpose of the Augmented Storage Array in the M30042040054X0IWAY?

The Augmented Storage Array is a dedicated 256-byte memory region physically separate from the main 4Mb array, organized into eight 32-byte sections. Each section can be individually programmed and write-locked via configuration registers. It is intended for critical, infrequently updated data such as calibration constants, cryptographic keys, or device-specific identifiers-providing isolation from firmware updates and enhanced security against accidental overwrites. The M30042040054X0IWAY guarantees its retention and endurance independently of main array usage.

Can the M30042040054X0IWAY be used in XIP (eXecute-In-Place) mode?

Yes, the M30042040054X0IWAY supports eXecute-In-Place mode. By sending the XIP enable command (0xAxh) after the address, the device enters a state where consecutive read instructions execute without reissuing the read command-reducing instruction overhead and improving effective throughput for code or lookup table access. XIP remains active until explicitly disabled (0xFxh) or until CS# goes high. This capability is confirmed in the architecture section of the official Renesas datasheet for the M30042040054X0IWAY.