Renesas AT25DF011-DWF

Overview

AT25DF011-DWF from Renesas Electronics is a 1-Mbit SPI serial Flash memory IC designed for code shadowing and embedded data storage in resource-constrained systems. It operates from 1.65 V to 3.6 V, supports SPI Modes 0/3 and Dual-Output Read at up to 50 MHz, delivers 6 ns clock-to-output timing, and features flexible erase granularity (256-byte page, 4-kByte/32-kByte blocks) - enabling efficient mixed code+data partitioning in IoT edge nodes and portable medical devices.

For engineers reviewing the AT25DF011-DWF datasheet, AT25DF011-DWF pinout, AT25DF011-DWF application, or AT25DF011-DWF equivalent, this page provides verified electrical specs, validated dual-I/O timing behavior, OTP security register architecture, low-power Deep/ Ultra-Deep Power-Down modes, and real-world erase/program cycle endurance across industrial temperature ranges.

Technical Context

The AT25DF011-DWF implements a dedicated SPI interface with hardware-controlled write protection via WP pin and suspend/resume capability via HOLD pin. Its memory array uses uniform 4-kByte and 32-kByte erase blocks plus 256-byte page erase, allowing independent update of firmware modules and configuration data without disturbing adjacent sectors.

Dual-Output Read mode leverages both SI (I/O0) and SO (I/O1) pins to output two bits per SCK falling edge, doubling read throughput versus standard Read Array (03h) at up to 50 MHz. The device integrates a 128-byte OTP security register - 64 bytes factory-programmed with unique ID, 64 bytes user-programmable - supporting secure boot and device authentication.

Key Specifications

Pinout & Package

AT25DF011-DWF is packaged in an 8-lead SOIC (150-mil) with standard JEDEC footprint. Pin functions are fully SPI-compliant and support hardware write protection and communication hold.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q80DVSSIG and MT25QL01GBBB8E12-0SIT, the AT25DF011-DWF offers optimal balance of ultra-low standby current (200 nA), integrated OTP security, and proven 256-byte page erase for firmware patching - making it uniquely suitable for cost-sensitive, battery-operated, and security-aware embedded systems where density >1 Mbit is unnecessary.

Availability

AT25DF011-DWF is available at Aetrix Electronics and suitable for IoT edge node firmware storage, portable medical device configuration, industrial HMI display boot memory, and automotive body control module code storage requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT25DF011-DWF 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 trusted microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

The AT25DF011-DWF belongs to Renesas' AT25DF family of SPI Flash memories, engineered specifically for reliable, low-power, and secure code+data storage in space-constrained embedded systems operating across industrial and extended temperature ranges.

FAQ

What is the maximum operating frequency of the AT25DF011-DWF in Dual-Output Read mode?

The AT25DF011-DWF supports Dual-Output Read (opcode 3Bh) at up to 50 MHz. This mode uses both SI and SO pins to output two bits per SCK falling edge, effectively doubling read throughput versus standard Read Array (03h) at 33 MHz. The 50 MHz limit ensures setup/hold timing margins are maintained under worst-case voltage and temperature conditions specified in the datasheet.

Does the AT25DF011-DWF support hardware write protection, and how is it implemented?

Yes, the AT25DF011-DWF implements hardware write protection via the WP (Write Protect) pin. When WP is driven low, it locks protected memory sectors regardless of software commands - preventing accidental program/erase operations during power transients or firmware bugs. The pin is internally pulled high, so it may be left floating if unused, though external connection to VCC is recommended for noise immunity.

How does the OTP security register in the AT25DF011-DWF function, and what is its structure?

The AT25DF011-DWF contains a 128-byte One-Time Programmable (OTP) security register: 64 bytes are factory-programmed with a unique device identifier, and 64 bytes are user-programmable for keys, certificates, or calibration data. Once written, OTP bytes cannot be erased or rewritten - ensuring permanent, tamper-resistant storage essential for secure boot and device authentication in the AT25DF011-DWF.

What erase block sizes does the AT25DF011-DWF support, and why is this important for firmware updates?

The AT25DF011-DWF supports four erase granularities: 256-byte page, 4-kByte block, 32-kByte block, and full-chip erase. This flexibility allows firmware updates to target only modified code segments - for example, updating a single driver module (256 bytes) without erasing the entire bootloader or application image. This reduces update time, wear on flash cells, and risk of corruption during power loss.

What power-saving modes does the AT25DF011-DWF offer, and what are their typical current draws?

The AT25DF011-DWF provides two ultra-low-power modes: Deep Power-Down (5 µA typical) and Ultra-Deep Power-Down (200 nA typical). Both disable internal circuitry except for wake-up logic. Ultra-Deep mode is entered via command 79h and exited by toggling CS; it is ideal for multi-year battery operation in always-on sensors where wake-up latency (<100 µs) is acceptable. The AT25DF011-DWF maintains full functionality upon exit without reinitialization.