Renesas AT45DB041E-SSHNHA-T

Overview

AT45DB041E-SSHNHA-T from Renesas Electronics is a 4-Mbit serial DataFlash memory with extra 128 kbits of OTP security space, operating from 1.65 V to 3.6 V, supporting SPI modes 0 and 3 up to 85 MHz, featuring two independent 256/264-byte SRAM buffers and RapidS™ high-speed read capability. It enables continuous data streaming in embedded voice, firmware storage, and industrial logging systems.

For engineers reviewing the AT45DB041E-SSHNHA-T datasheet, AT45DB041E-SSHNHA-T pinout, AT45DB041E-SSHNHA-T application, or AT45DB041E-SSHNHA-T equivalent, key selection criteria include buffer-interleaved write throughput, ultra-deep power-down current (400 nA), page/block/sector/chip erase flexibility, hardware/software sector protection, and 20-year data retention at industrial temperature range (-40 °C to +85 °C).

Technical Context

The AT45DB041E-SSHNHA-T implements a sequential-access Flash architecture with dual SRAM buffers enabling concurrent receive-and-program operation - eliminating write latency bottlenecks in real-time data capture. Its RapidS™ mode supports high-frequency continuous array reads using opcodes 0Bh and 1Bh, achieving ≤6 ns clock-to-output timing.

It integrates configurable page size (256 or 264 bytes, factory-set), programmable sector protection, permanent sector lockdown, and a 128-byte OTP security register with 64-byte factory-unique ID. All erase and program operations are self-timed with suspend/resume capability for system-level task arbitration.

Key Specifications

Pinout & Package

AT45DB041E-SSHNHA-T is packaged in an 8-pad Ultra-thin DFN (5 × 6 × 0.6 mm) with exposed thermal pad (NC or GND). Pin functions are fully SPI-compliant and optimized for minimal PCB footprint and noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q40EW and SST26VF040A, the AT45DB041E-SSHNHA-T uniquely delivers buffer-interleaved sequential writes, RapidS™-accelerated reads, and integrated OTP-based device identity - making it optimal for resource-constrained, security-aware, and real-time streaming applications where write latency and tamper resistance are design-critical.

Availability

AT45DB041E-SSHNHA-T is available at Aetrix Electronics and suitable for firmware storage, industrial data logging, secure identity modules, and audio voice recording requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for AT45DB041E-SSHNHA-T 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 belongs to Renesas' DataFlash® family - designed specifically for high-reliability, low-pin-count, sequential-access Flash applications demanding concurrent read/write, ultra-low power, and embedded security.

FAQ

What is the maximum SPI clock frequency supported by the AT45DB041E-SSHNHA-T?

The AT45DB041E-SSHNHA-T supports up to 85 MHz in RapidS™ mode using opcodes 0Bh or 1Bh. In standard SPI mode, it operates up to 66 MHz. The 6 ns maximum clock-to-output time (tV) ensures timing compliance at these speeds. This high-frequency capability makes the AT45DB041E-SSHNHA-T suitable for fast firmware loading and real-time audio streaming applications.

Does the AT45DB041E-SSHNHA-T support true concurrent read and write operations?

Yes - the AT45DB041E-SSHNHA-T features two independent 256/264-byte SRAM buffers that allow simultaneous data reception (into one buffer) while reprogramming the main memory array (from the other buffer). This interleaving eliminates write stalls and enables continuous data streams, a capability not found in standard SPI NOR Flash devices like the AT45DB041E-SSHNHA-T's alternatives.

How is data security implemented in the AT45DB041E-SSHNHA-T?

The AT45DB041E-SSHNHA-T includes a 128-byte One-Time Programmable (OTP) Security Register with 64 bytes factory-programmed with a unique identifier and 64 bytes user-programmable. It also supports individual sector lockdown - permanently making any sector read-only - and software/hardware sector protection. These features collectively provide tamper-resistant identity binding and firmware partitioning for the AT45DB041E-SSHNHA-T.

What erase granularities does the AT45DB041E-SSHNHA-T support?

The AT45DB041E-SSHNHA-T supports four erase levels: page (256/264 bytes), block (2 kB), sector (64 kB), and chip (4 Mbit). This flexibility enables precise wear leveling, incremental firmware updates, and field patching without full device reprogramming - a key advantage over uniform-erase NOR Flash devices in the same density class as the AT45DB041E-SSHNHA-T.

Is the AT45DB041E-SSHNHA-T compatible with standard SPI controllers?

Yes - the AT45DB041E-SSHNHA-T is fully compatible with standard 3-wire SPI interfaces and supports both SPI mode 0 and mode 3. It uses standard opcodes for read, program, and erase commands, and its pinout (CS, SCK, SI, SO, WP, RESET, VCC, GND) aligns with common SPI peripheral layouts. No special controller firmware or hardware is required to integrate the AT45DB041E-SSHNHA-T into existing SPI-based designs.