Renesas AT45DB041E-MHN-Y

Overview

AT45DB041E-MHN-Y from Renesas Electronics is a 4-Mbit serial DataFlash memory with 2,048 pages (256 or 264 bytes each), dual 256/264-byte SRAM buffers, SPI interface (modes 0 and 3), and RapidS™ high-speed operation up to 85 MHz. It operates from 1.65 V–3.6 V, supports page/block/sector/chip erase, and delivers 6 ns clock-to-output timing for embedded firmware storage and real-time data logging.

For engineers reviewing the AT45DB041E-MHN-Y datasheet, AT45DB041E-MHN-Y pinout, AT45DB041E-MHN-Y application, or AT45DB041E-MHN-Y equivalent, key selection criteria include its dual-buffer interleaved write capability, ultra-deep power-down current (400 nA), factory-programmable OTP security register, and industrial temperature support (−40 °C to +85 °C).

Technical Context

The AT45DB041E-MHN-Y implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent read-while-write operations-critical for continuous data streaming in telemetry and audio buffering. Its RapidS™ mode supports high-frequency SPI commands (0Bh/1Bh opcodes) for sub-10 ns tV timing and 85 MHz clock rates.

It features hardware/software sector protection, 128-byte OTP Security Register (64 bytes factory-unique ID + 64 bytes user-programmable), and programmable page size (256 vs. 264 bytes). Erase granularity spans page (256/264 B), block (2 kB), sector (64 kB), and full chip (4 Mbits), with suspend/resume for program/erase operations.

Key Specifications

Pinout & Package

AT45DB041E-MHN-Y uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm) with exposed thermal pad (NC or GND). Pin functions are defined per JEDEC-compliant layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial Flash memory applications.

Compared with AT45DB041D-MHN-Y, the AT45DB041E-MHN-Y delivers 29% faster clock rate, 400 nA ultra-deep power-down, and RapidS™ timing - critical for battery-constrained real-time systems. Versus W25Q40EWBYIG, it offers deterministic dual-buffer concurrency and hardware-enforced sector lockdown, but trades quad I/O for simpler SPI wiring and lower pin count.

Availability

AT45DB041E-MHN-Y is available at Aetrix Electronics and suitable for firmware storage, data logging, audio buffering, and secure identity storage requiring stable component supply across industrial, medical, and connected-device programs.

Supply support for AT45DB041E-MHN-Y 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 IoT markets.

The AT45DB041E-MHN-Y belongs to Renesas' DataFlash® family, designed specifically for high-reliability, low-pin-count, low-voltage serial memory applications where sequential access, dual-buffer concurrency, and robust security features are required.

FAQ

What is the page size configuration for AT45DB041E-MHN-Y?

The AT45DB041E-MHN-Y supports user-configurable page sizes: 256 bytes (factory pre-configured option) or 264 bytes (default). Configuration is performed via Buffer and Page Size Configuration Commands (Table 22), and the setting persists across power cycles. This flexibility enables optimization for E2PROM emulation (256-byte alignment) or legacy DataFlash compatibility (264-byte format).

Does AT45DB041E-MHN-Y support true read-while-write operation?

Yes, AT45DB041E-MHN-Y implements true read-while-write using two fully independent 256/264-byte SRAM buffers. While one buffer receives incoming data via SPI, the other can simultaneously transfer content to main memory or be read out - enabling uninterrupted data streaming in telemetry and audio applications without CPU intervention.

What security features does AT45DB041E-MHN-Y provide?

AT45DB041E-MHN-Y includes individual sector protection, permanent sector lockdown (via WP pin or command), and a 128-byte OTP Security Register with 64 bytes factory-programmed unique ID and 64 bytes user-programmable space. These features enable secure boot key binding, device identity attestation, and tamper-resistant firmware partitioning.

How does RapidS™ mode improve performance over standard SPI in AT45DB041E-MHN-Y?

RapidS™ mode in AT45DB041E-MHN-Y enables 85 MHz operation and reduces clock-to-output time to 6 ns maximum - significantly faster than standard SPI Flash. It uses dedicated opcodes (0Bh/1Bh) and optimized internal timing, eliminating setup/hold bottlenecks and supporting deterministic high-throughput reads for real-time firmware execution and audio playback.

What is the industrial temperature rating for AT45DB041E-MHN-Y?

AT45DB041E-MHN-Y is rated for full industrial temperature operation from −40 °C to +85 °C, with guaranteed performance including 100,000 program/erase cycles and 20-year data retention within this range. It complies with green (Pb/Halide-free/RoHS) packaging standards and is qualified for deployment in harsh environments without thermal derating.