Renesas M30042040054X0PSAY

Overview

M30042040054X0PSAY from Renesas is a 4Mb serial STT-MRAM non-volatile memory with QSPI interface, 54MHz DDR timing, industrial-plus temperature rating (−40°C to +105°C), and 8-pad DFN (WSON) package. It delivers SRAM-compatible random read/write latency, zero write endurance limit, and data retention exceeding 20 years - ideal for real-time data logging in medical diagnostics equipment.

For engineers reviewing the M30042040054X0PSAY datasheet, M30042040054X0PSAY pinout, M30042040054X0PSAY application, or M30042040054X0PSAY equivalent, key selection considerations include its 1.71–2.0V/2.7–3.6V dual-voltage support, hardware/software write protection, 256-byte augmented storage array, and JEDEC reset compatibility.

Technical Context

This MRAM implements spin-transfer torque (STT) technology on a 40nm pMTJ process, enabling true byte-addressable non-volatility with no erase cycles. Its QSPI interface supports x4 I/O (1-4-4) configuration and both SDR and DDR modes - with DDR operation at 54MHz using both clock edges for address/data transfer.

The device integrates dedicated registers for status control, block-level software write protection (BP[2:0]), top/bottom memory segmentation, and configurable deep power-down/hibernate entry/exit timing (≤3µs entry, ≤450µs exit). All operations are initiated via an 8-bit instruction register with CS#-synchronized command latching.

Key Specifications

Pinout & Package

Package: 8-pad DFN (WSON), 5.0 mm × 6.0 mm, 0.5 mm pitch, exposed thermal pad - compatible with standard SOIC-8 reflow profiles and PCB assembly lines.

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 CY14B104N-ZSP25XI, M30042040054X0PSAY uniquely combines QPI DDR timing, dual-voltage operation, and integrated augmented storage - making it the only option supporting high-throughput, multi-rail, and secure configuration storage in a single 5×6 mm WSON package.

Availability

M30042040054X0PSAY is available at Aetrix Electronics and suitable for factory automation, medical diagnostics, and industrial control applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M30042040054X0PSAY 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 family was designed as a drop-in persistent SRAM (P-SRAM) replacement - delivering non-volatility without sacrificing SRAM-like performance, specifically targeting high-reliability embedded systems where data integrity and write endurance are mission-critical.

FAQ

What voltage ranges does the M30042040054X0PSAY support?

M30042040054X0PSAY supports two independent supply rails: 1.71–2.00 V and 2.70–3.60 V. This dual-voltage capability allows direct integration into mixed-signal systems without external level shifters. The device automatically detects and operates within either range - verified per JEDEC JESD8-12E and JESD8-13 standards. Both rails power core logic and I/O simultaneously; no separate VIO rail is required.

Does the M30042040054X0PSAY require an external crystal or clock source?

No, the M30042040054X0PSAY does not require an external crystal. It operates synchronously with the host-provided CLK signal, which must be supplied by the controller (e.g., MCU or FPGA). The device accepts clock frequencies up to 54 MHz in DDR mode or 108 MHz in SDR mode, with timing compliance verified across −40°C to +105°C. Internal regulation ensures stable internal timing regardless of VCC variation within spec.

How is data protected against unintended writes on the M30042040054X0PSAY?

M30042040054X0PSAY implements dual-layer write protection: hardware-based via the WP# pin (active-low lock for status register), and software-based via BP[2:0] bits in the status register that enable selectable 1/2/4/8 KB block protection. The TBSEL bit further allows top- or bottom-sector locking. All protections persist through power cycles and deep power-down states - confirmed in Table 31 of the datasheet under Endurance and Data Retention specifications.

What is the purpose of the Augmented Storage Array in the M30042040054X0PSAY?

The Augmented Storage Array is a dedicated 256-byte memory region divided into eight 32-byte sections, each individually programmable and write-protectable. It is used to store critical system data such as calibration constants, device serial numbers, cryptographic keys, or firmware version stamps - isolated from the main 4Mb array to prevent corruption during bulk updates. Its contents survive all power-loss events and retain validity for ≥20 years at 105°C.

Can the M30042040054X0PSAY be used in place of standard SPI flash in existing designs?

Yes, the M30042040054X0PSAY is pin-compatible and electrically compatible with industry-standard 8-pin SOIC and 8-pad DFN SPI flash devices, including identical CS#/CLK/SO/SI/WP#/HOLD# pin assignments. However, firmware must be updated to leverage MRAM-specific features like XIP mode, DDR timing, and block protection register layout. No PCB changes are needed for migration from flash to M30042040054X0PSAY in either package variant.