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Renesas AT25SF041B-SHD-T
- Part No.:
- AT25SF041B-SHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF041B-SHD-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,260
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Product details
Overview
AT25SF041B-SHD-T from Renesas Electronics is a 4 Mbit SPI serial flash memory IC designed for embedded boot code and XiP (execute-in-place) applications. It supports dual I/O and quad I/O read modes (1-4-4, 0-4-4), operates up to 108 MHz, delivers 0.4 ms typical page program time, and features 100,000 program/erase cycles with 20-year data retention.
For engineers reviewing the AT25SF041B-SHD-T datasheet, AT25SF041B-SHD-T pinout, AT25SF041B-SHD-T application, or AT25SF041B-SHD-T equivalent, key selection criteria include quad-SPI timing compliance, continuous read mode support, OTP security register availability, and SOIC-8 (208-mil) package compatibility with industrial temperature range (-40°C to +85°C).
Technical Context
The AT25SF041B-SHD-T implements a flexible SPI interface supporting modes 0 and 3, with configurable dual-output (1-1-2), dual-I/O (1-2-2), quad-output (1-1-4), and quad-I/O (1-4-4, 0-4-4) operations. Its memory array is organized into 4 kB, 32 kB, and 64 kB erase blocks plus full-chip erase, enabling granular firmware updates and data partitioning.
Internal control logic integrates Serial Flash Discoverable Parameters (SFDP) register access, erase/program suspend-resume capability, and two status registers with programmable protection bits (SRP0/SRP1/BPL). The device uses a dedicated 3×256-byte OTP security register space for unique ID storage and secure boot keys.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KB) - sufficient for compact MCU boot images and configuration data in space-constrained designs. |
| Max Clock Frequency | 108 MHz - enables high-throughput code fetch for XiP operation with sub-100 ns effective read latency in quad-I/O mode. |
| Page Program Time | 0.4 ms (typical) - allows rapid field firmware patching without disrupting real-time system operation. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full chip - supports independent update of bootloader, application, and parameter sectors. |
| Endurance & Retention | 100,000 cycles / 20 years - meets industrial lifecycle requirements for infrequently updated firmware storage. |
| Supply Voltage | 2.5 V–3.6 V - compatible with modern low-voltage microcontrollers and PMICs without level-shifting. |
| Standby Current | 13.3 µA (typical) - minimizes quiescent power in battery-backed or always-on edge devices. |
Pinout & Package
AT25SF041B-SHD-T is packaged in an 8-pin wide-body SOIC (208-mil), compliant with EIAJ standards. Pin functions are fully defined per Renesas DS-AT25SF041B-190 Rev. K.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate commands and low-to-high to terminate operations. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO/I/Ox). |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad I/O reads. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Default data output; becomes bidirectional I/O1 during dual/quad I/O reads. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Configurable: hardware write-protection when QE=0, or I/O2 lane when QE=1 (Status Register 2 bit). |
| HOLD (I/O3) | Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state; becomes I/O3 lane in quad-I/O mode when QE=1. |
| VCC | Power Supply | 2.5–3.6 V supply; requires external 10 kΩ pull-up on CS for reliable power-up sequencing. |
| GND | Ground Reference | System ground connection; critical for noise immunity in high-speed SPI signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Continuous Read (0-4-4) | Eliminates opcode retransmission overhead, enabling sustained high-bandwidth code execution directly from flash. |
| 3×256-byte OTP Security Registers | Provides tamper-resistant storage for cryptographic keys, device IDs, or secure boot manifests. |
| Erase/Program Suspend-Resume | Allows interrupting long erase/program operations to service time-critical host requests, then resuming transparently. |
| User-Definable Memory Protection | Enables hardware-enforced write lock on top/bottom memory regions via WP pin or status register bits. |
| SFDP Register Support | Permits automatic discovery of timing parameters, erase block sizes, and feature sets by host bootloader or tooling. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device Boot Code |
|---|---|
Use Scenario: Storing firmware images and runtime configuration in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile boot memory providing XiP-capable instruction fetch at 108 MHz for deterministic real-time task scheduling. Use Value: 4 kB block erase enables incremental firmware updates without full reflash, reducing downtime during maintenance windows. |
Use Scenario: Hosting secure boot loader and application firmware in battery-powered wireless sensors operating in remote locations. IC Role / Device Role / Timing Role: Low-power SPI flash with deep power-down current of 1.2 µA, supporting multi-year battery life. Use Value: OTP security registers store device-specific keys for TLS handshake, preventing cloning and unauthorized firmware injection. |
| Medical Diagnostic Instrument BIOS | Automotive Infotainment System Configuration |
Use Scenario: Storing calibration data, safety-critical boot code, and diagnostic logs in FDA-regulated medical imaging equipment. IC Role / Device Role / Timing Role: High-reliability memory with 20-year data retention and 100,000-cycle endurance for regulatory-compliant archival. Use Value: Dual-I/O fast read (3Bh) reduces boot time by 40% vs standard SPI, accelerating system readiness after power-on reset. |
Use Scenario: Holding UI assets, voice recognition models, and vehicle-specific configuration profiles in head unit ECUs. IC Role / Device Role / Timing Role: Quad-I/O (1-4-4) flash interfacing with ARM Cortex-A application processors via high-speed SPI bus. Use Value: Continuous read mode eliminates inter-byte command overhead, sustaining >40 MB/s effective throughput for multimedia asset streaming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | 4 Mbit density, 133 MHz max clock, no OTP registers, different SFDP layout and QE bit location. | Lacks 3×256-byte OTP security space; requires modified bootloader for status register handling. | Preferred where higher clock speed is critical and security key storage is handled externally. |
| Macronix MX25L4006E | 4 Mbit density, 85 MHz max clock, supports 1-1-4 only (no 0-4-4), no suspend/resume, no SFDP. | Cannot support continuous quad-I/O read; lacks runtime interruptible erase/program capability. | Selected for cost-sensitive designs where XiP bandwidth and advanced command flexibility are not required. |
Compared with Winbond W25Q40EW and Macronix MX25L4006E, the AT25SF041B-SHD-T uniquely combines 108 MHz quad-I/O performance, 0-4-4 continuous read, OTP security registers, and erase/program suspend-making it optimal for secure, high-performance embedded boot and XiP use cases.
Availability
AT25SF041B-SHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge device boot code, medical diagnostic instrument BIOS, and automotive infotainment system configuration requiring stable component supply across extended product lifecycles.
Supply support for AT25SF041B-SHD-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 AT25SF041B-SHD-T belongs to Renesas' AT25SF family of SPI flash memories engineered specifically for robust, secure, and high-speed embedded boot and execute-in-place applications.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF041B-SHD-T?
The AT25SF041B-SHD-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O (1-4-4) and quad-output (1-1-4) read modes. This enables high-bandwidth code execution for XiP applications. The device maintains timing compliance across its full industrial temperature range (-40°C to +85°C) and 2.5–3.6 V supply voltage window.
Does the AT25SF041B-SHD-T support execute-in-place (XiP) functionality?
Yes, the AT25SF041B-SHD-T is explicitly designed for XiP operation. It achieves this through quad-SPI interface support (1-4-4, 0-4-4), continuous read mode that eliminates repeated opcode transmission, and 108 MHz maximum clock rate-collectively minimizing instruction fetch latency and enabling direct CPU execution from flash memory.
How many and what type of security registers does the AT25SF041B-SHD-T include?
The AT25SF041B-SHD-T includes three 256-byte One-Time Programmable (OTP) security registers. These registers are used for storing immutable data such as unique device identifiers, cryptographic keys, or secure boot manifests. Once programmed, their contents cannot be altered, providing hardware-level protection against firmware tampering.
What package type is used for the AT25SF041B-SHD-T?
The AT25SF041B-SHD-T uses an 8-pin wide-body SOIC package (208-mil), also referred to as EIAJ SOIC. This package complies with industry-standard footprint dimensions and is RoHS-compliant, halogen-free, and lead-free. It is pin-compatible with other members of the AT25SF family in the same package variant.
Can the AT25SF041B-SHD-T suspend an ongoing erase or program operation?
Yes, the AT25SF041B-SHD-T supports erase/program suspend and resume functionality via dedicated 75h and 7Ah commands. This allows the host processor to temporarily halt a long-duration operation (e.g., 200 ms 64 kB block erase) to handle urgent interrupts, then resume from the exact point of suspension-ensuring deterministic real-time responsiveness.
AT25SF041B-SHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 108 MHz
- Write Cycle Time - Word, Page:
- 50µs, 2.4ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF041B-SHD-T FAQ
1.How can I place an order for AT25SF041B-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-SHD-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25SF041B-SHD-T reliable?
The price and inventory of AT25SF041B-SHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF041B-SHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF041B-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-SHD-T?
AT25SF041B-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-SHD-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25SF041B-SHD-T?
For technical support, including AT25SF041B-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-SHD-T requirements.
6.How does Aetrix verify that AT25SF041B-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-SHD-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25SF041B-SHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF041B-SHD-T?
All AT25SF041B-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-SHD-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25SF041B-SHD-T part is unused and in its original packaging.
Return procedure for AT25SF041B-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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