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Renesas AT25SF041B-SHD-B
- Part No.:
- AT25SF041B-SHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF041B-SHD-B.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:21,107
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Product details
Overview
AT25SF041B-SHD-B from Renesas Electronics is a 4 M-bit SPI serial flash memory IC supporting dual I/O and quad I/O operations, 108 MHz max clock frequency, 2.5–3.6 V supply, and execute-in-place (XiP) capability for embedded boot and code storage. It features 4 kB/32 kB/64 kB block erase, 256-byte page programming, and OTP security registers.
For engineers reviewing the AT25SF041B-SHD-B datasheet, AT25SF041B-SHD-B pinout, AT25SF041B-SHD-B application, or AT25SF041B-SHD-B equivalent, key selection criteria include XiP support, quad-SPI timing compliance, deep power-down current (1.2 µA), JEDEC-standard SFDP register access, and flexible memory protection via WP pin and status register configuration.
Technical Context
The AT25SF041B-SHD-B implements a SPI-compatible interface with full support for modes 0 and 3, enabling interoperability with standard microcontroller SPI peripherals. Its command set includes dedicated opcodes for dual-output (3Bh), dual-I/O (BBh), quad-output (6Bh), and quad-I/O read (EBh/E7h), plus continuous read mode (0-4-4) to eliminate opcode overhead during burst fetches.
Internally, the device integrates SRAM data buffers, Y/X decoders, and control logic that manages erase suspend/resume, status register write protection, and quad-enable (QE) bit-controlled I/O pin reconfiguration (WP/HOLD as I/O2/I/O3). Memory protection is enforced via non-volatile bits (SRP0/SRP1) and user-definable protected regions at array start or end.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB) organized as 64 × 64 kB blocks; enables compact firmware storage without external expansion. |
| Max Clock Frequency | 108 MHz in quad-I/O mode; delivers up to 54 MB/s effective read bandwidth for real-time XiP execution. |
| Erase Granularity | 4 kB, 32 kB, 64 kB blocks and full chip; allows selective firmware update without disturbing adjacent code/data sections. |
| Program Time | 0.4 ms typical per 1–256 byte page; supports fast field firmware patching and configuration writes. |
| Power Consumption | 1.2 µA deep power-down current; extends battery life in always-on IoT edge nodes during idle periods. |
| Data Retention | 20 years at 85 °C; ensures long-term reliability for industrial control firmware and calibration data storage. |
| Endurance | 100,000 program/erase cycles; suitable for applications requiring frequent parameter logging or OTA update staging. |
Pinout & Package
AT25SF041B-SHD-B is packaged in an 8-pin narrow-body SOIC (150-mil) with standard JEDEC footprint. All pins are electrically validated 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 SI input, falling edge clocks SO output; supports up to 108 MHz. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary command/address/data input; becomes bidirectional I/O0 in dual/quad modes for parallel bit transfer. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Standard data output; functions as I/O1 in dual/quad modes to enable 2- or 4-bit simultaneous reads. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Configurable: hardware write-protection when QE=0, or I/O2 in quad mode when QE=1; internally pulled high. |
| HOLD (I/O3) | Hold / Quad I/O 3 | Pauses ongoing SPI transaction without resetting state; repurposed as I/O3 in quad mode; internally pulled high. |
| VCC | Power Supply | 2.5–3.6 V operation; supports single-supply systems with mixed-voltage SoCs or MCUs. |
| GND | Ground Reference | System ground return; requires low-impedance connection to minimize noise coupling into SPI signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Execute-in-Place (XiP) Support | Enabled via 0-4-4 continuous read mode and 108 MHz quad-I/O, eliminating opcode latency for direct CPU instruction fetch. |
| Serial Flash Discoverable Parameters (SFDP) | JEDEC-standard SFDP register (5Ah command) provides programmable, vendor-agnostic configuration metadata for automatic driver initialization. |
| Flexible Memory Protection | User-definable protected region at memory start or end, controlled by SRP0/SRP1 bits and hardware WP pin assertion. |
| OTP Security Registers | Three 256-byte one-time programmable registers for secure key storage, device ID binding, or anti-cloning measures. |
| Erase/Program Suspend & Resume | Allows interrupting long erase (up to 200 ms) or program cycles to service higher-priority host requests, then resume without data loss. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing firmware images and runtime configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile boot memory and persistent parameter store; supports XiP for deterministic startup and fast field updates via quad-I/O. Use Value: 20-year data retention and 100K endurance ensure firmware integrity across extended maintenance cycles without recalibration or replacement. | Use Scenario: Holding sensor calibration data, network credentials, and OTA update staging buffers in battery-powered smart meters and environmental monitors. IC Role / Device Role / Timing Role: Low-power configuration memory; leverages deep power-down (1.2 µA) and fast wake-up for intermittent sensing duty cycles. Use Value: 1.2 µA deep power-down current directly extends 10-year battery life in sealed deployments where battery replacement is impractical. |
| Medical Diagnostic Boot Loader | Automotive Infotainment Code Storage |
Use Scenario: Hosting certified boot loader and diagnostic application binaries in portable ultrasound or ECG devices requiring regulatory-compliant firmware traceability. IC Role / Device Role / Timing Role: Secure boot memory with OTP registers for cryptographic key injection and unique device ID (4Bh command) for audit logging. Use Value: Three 256-byte OTP registers provide tamper-resistant storage for keys and certificates, meeting IEC 62304 software lifecycle requirements. | Use Scenario: Storing infotainment OS kernel, UI assets, and map data in automotive head units with AEC-Q100-aligned thermal and reliability demands. IC Role / Device Role / Timing Role: High-speed code storage supporting XiP execution; uses 108 MHz quad-I/O and continuous read to reduce UI latency during navigation rendering. Use Value: 108 MHz quad-I/O read bandwidth enables sub-50 ms UI asset loading, improving perceived responsiveness during map zoom/pan operations. |
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 M-bit density, 133 MHz max clock, 1.65–1.95 V or 2.7–3.6 V dual supply; lacks SFDP register and OTP security registers. | Targeted at cost-sensitive consumer electronics; not qualified for industrial temperature range (-40°C to 85°C) with same endurance spec. | Select when maximum speed (133 MHz) and ultra-low voltage operation are critical, and SFDP/OTP are not required. |
| Micron MT25QL04A | 4 M-bit density, 133 MHz max clock, supports SFDP and quad-I/O; no OTP registers; deep power-down current is 2.5 µA (vs. 1.2 µA). | Designed for automotive AEC-Q100 Grade 3; wider qualification scope but higher standby current impacts battery life. | Select for automotive-grade qualification where AEC-Q100 compliance is mandatory and 1.3 µA lower deep power-down is non-critical. |
Compared with W25Q40EW and MT25QL04A, the AT25SF041B-SHD-B uniquely combines industrial temperature rating, 1.2 µA deep power-down, JEDEC SFDP, and three OTP registers-making it optimal for secure, long-life, low-power embedded firmware storage where certification and longevity are prioritized over peak clock speed.
Availability
AT25SF041B-SHD-B is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node configuration, medical diagnostic boot loaders, and automotive infotainment code storage requiring stable component supply and long-term lifecycle support.
Supply support for AT25SF041B-SHD-B 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 memory solutions for automotive, industrial, and enterprise applications.
The AT25SF041B belongs to Renesas' serial flash memory product line, engineered for reliable, low-power, and secure code and configuration storage in resource-constrained embedded systems demanding XiP, fast read throughput, and long-term data integrity.
FAQ
What is the maximum operating frequency supported by the AT25SF041B-SHD-B?
The AT25SF041B-SHD-B supports a maximum operating frequency of 108 MHz in quad-I/O mode (1-4-4), enabling up to 54 MB/s effective read bandwidth. This specification is validated under 2.5–3.6 V supply and -40°C to +85°C ambient conditions per DS-AT25SF041B-190 Rev. K Section 13.4.
Does the AT25SF041B-SHD-B support execute-in-place (XiP) functionality?
Yes, the AT25SF041B-SHD-B supports execute-in-place (XiP) through optimized read features: quad-SPI (1-4-4), continuous read mode (0-4-4), and 108 MHz clock rate. These allow direct CPU instruction fetch without intermediate buffering, reducing boot latency and memory footprint in embedded systems.
How many one-time programmable (OTP) security registers does the AT25SF041B-SHD-B include?
The AT25SF041B-SHD-B includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h/44h/48h). These registers support secure key storage, device binding, and anti-counterfeiting measures in safety-critical applications.
What package type is used for the AT25SF041B-SHD-B variant?
The AT25SF041B-SHD-B uses an 8-pin narrow-body SOIC package (150-mil), compliant with JEDEC MS-012 standards. Pinout matches Figure 1 on page 8 of DS-AT25SF041B-190 Rev. K and is compatible with standard SOIC-8 footprints.
Can the AT25SF041B-SHD-B operate across the full industrial temperature range?
Yes, the AT25SF041B-SHD-B is rated for operation from -40°C to +85°C, as confirmed in Section 13.2 (DC and AC Operating Range) of the official datasheet. This makes it suitable for deployment in industrial automation, outdoor IoT, and medical equipment environments.
AT25SF041B-SHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 5µs, 2.5ms
- 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-B FAQ
1.How can I place an order for AT25SF041B-SHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-SHD-B 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-B reliable?
The price and inventory of AT25SF041B-SHD-B 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-B is usually 5 days.
3.What payment methods are accepted for AT25SF041B-SHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-SHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-SHD-B?
AT25SF041B-SHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-SHD-B 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-B?
For technical support, including AT25SF041B-SHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-SHD-B requirements.
6.How does Aetrix verify that AT25SF041B-SHD-B is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-SHD-B 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-B meets industry standards.
7.What is the process for return or replacement of AT25SF041B-SHD-B?
All AT25SF041B-SHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-SHD-B, 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-B part is unused and in its original packaging.
Return procedure for AT25SF041B-SHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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