Renesas AT45DB081D-SSU-2.5-SL383

Overview

AT45DB081D-SSU-2.5-SL383 from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, 256/264-byte configurable page size, dual 256-/264-byte SRAM buffers, and industrial temperature support. It delivers up to 66 MHz read throughput for code shadowing and firmware storage in resource-constrained embedded systems.

For engineers reviewing the AT45DB081D-SSU-2.5-SL383 datasheet, AT45DB081D-SSU-2.5-SL383 pinout, AT45DB081D-SSU-2.5-SL383 application, or AT45DB081D-SSU-2.5-SL383 equivalent, key selection criteria include its dual-buffered sequential access architecture, hardware/software sector protection, 100,000 program/erase cycles, and 2.5V single-supply operation with deep power-down current of 15 µA.

Technical Context

The AT45DB081D-SSU-2.5-SL383 implements a serial flash architecture with two independent 256-/264-byte SRAM buffers enabling concurrent data reception and main memory reprogramming. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, with continuous array read bypassing buffers to enable seamless code execution from flash.

Memory organization comprises 4,096 pages (256 or 264 bytes each), grouped into 16 sectors (sector 0 split into 0a/0b), with flexible erase granularity: page (256 B), block (2 KB), sector (64 KB), or chip (8 Mbit). All program and erase operations are internally self-timed and require no external high-voltage supply.

Key Specifications

Pinout & Package

AT45DB081D-SSU-2.5-SL383 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard 150-mil body width and RoHS-compliant green finish. Pin 1 is marked with a beveled corner or dot; the package is lead-free and halide-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-SSU-2.5-SL383 uniquely integrates dual SRAM buffers for zero-latency streaming, configurable page formats for EEPROM compatibility, and on-die security features - making it optimal for secure, field-upgradable embedded systems where concurrent read/write and tamper resistance are mandatory.

Availability

AT45DB081D-SSU-2.5-SL383 is available at Aetrix Electronics and suitable for firmware storage, code shadowing, secure data logging, and industrial configuration storage requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT45DB081D-SSU-2.5-SL383 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

Adesto Technologies (now part of Dialog Semiconductor, a Renesas company) specialized in low-power, high-performance nonvolatile memory and analog solutions for IoT and industrial edge devices.

The AT45DB081D-SSU-2.5-SL383 belongs to the DataFlash® family, designed specifically for embedded systems needing efficient serial flash with built-in buffers, flexible erase, and hardware security - targeting applications where parallel NOR/NAND interfaces are impractical due to pin count or power constraints.

FAQ

What is the maximum operating frequency of the AT45DB081D-SSU-2.5-SL383 serial interface?

The AT45DB081D-SSU-2.5-SL383 supports a maximum RapidS™ serial clock frequency of 66 MHz for Continuous Array Read (opcodes 0BH and E8H) and Main Memory Page Read (D2H). This applies to both 256-byte and 264-byte page configurations. The device remains fully SPI-compatible in Modes 0 and 3 at this rate, enabling high-throughput firmware loading and code shadowing in performance-critical applications.

Does the AT45DB081D-SSU-2.5-SL383 support true byte-level writes like EEPROM?

The AT45DB081D-SSU-2.5-SL383 does not support true random byte writes. However, it enables EEPROM emulation via a self-contained three-step read-modify-write operation using its dual SRAM buffers. A page is read into a buffer, modified, and written back - all managed by host firmware. This avoids external RAM buffering and maintains data integrity during partial updates, making it suitable for parameter storage where byte-alterability is functionally required.

How does the WP pin interact with software-based sector protection on the AT45DB081D-SSU-2.5-SL383?

On the AT45DB081D-SSU-2.5-SL383, the WP pin provides hardware-level override protection: when asserted (low), it blocks all program and erase operations on sectors marked in the Sector Protection Register - even if software protection is disabled. Crucially, WP does not inhibit the Enable Sector Protection or Sector Lockdown commands themselves, allowing dynamic configuration of protected regions before hardware lock activation.

What package type and footprint does the AT45DB081D-SSU-2.5-SL383 use?

The AT45DB081D-SSU-2.5-SL383 uses an 8-pin SOIC (Small Outline Integrated Circuit) package with 150-mil body width (standard JEDEC MS-012AC), designated by the "-SSU" suffix. It is RoHS-compliant, lead-free, and halide-free. Pin 1 is identified by a beveled corner or dot; no thermal pad is present, distinguishing it from MLF/VDFN variants.

Can the AT45DB081D-SSU-2.5-SL383 operate from a 2.5V supply only, or does it require 2.7V minimum?

The AT45DB081D-SSU-2.5-SL383 is explicitly rated for single-supply operation at either 2.5V ±0.2V (2.3V–2.7V) or 2.7V–3.6V. The "-2.5" in the part number confirms 2.5V nominal compatibility. All specifications - including 66 MHz operation, 7 mA read current, and 100,000 endurance cycles - are guaranteed across the full 2.5V range, enabling direct integration with 2.5V FPGA I/O banks and low-voltage microcontrollers without level shifters.