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Renesas AT25SF041B-SSHB-B
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- Part No.:
- AT25SF041B-SSHB-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF041B-SSHB-B.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:124,879
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Product details
Overview
AT25SF041B-SSHB-B from Renesas Electronics is a 4 M-bit SPI serial flash memory IC designed for embedded program storage and execute-in-place (XiP) applications. It supports dual I/O (1-2-2), quad I/O (1-4-4, 0-4-4), and standard SPI modes 0/3, operates up to 108 MHz, and delivers 0.4 ms typical page program time with 100,000 program/erase cycles endurance.
For engineers reviewing the AT25SF041B-SSHB-B datasheet, AT25SF041B-SSHB-B pinout, AT25SF041B-SSHB-B application, or AT25SF041B-SSHB-B equivalent, key selection criteria include XiP-read latency, quad-SPI command compatibility, flexible memory protection via WP pin and status register bits, and low-power deep power-down (1.2 µA) for battery-sensitive designs.
Technical Context
The AT25SF041B-SSHB-B implements a unified SPI interface supporting legacy single-I/O, dual-output (1-1-2), dual-I/O (1-2-2), quad-output (1-1-4), and full quad-I/O (1-4-4, 0-4-4) read protocols - enabling optimized bandwidth per host controller capability. Its internal architecture includes SRAM data buffer, Y/X decoders, and control logic that manages erase suspend/resume, continuous read wrap (8/16/32/64-byte), and SFDP register access.
Memory protection is implemented via non-volatile status register bits (SRP0/SRP1/CMP), user-definable protected regions at array start/end, and hardware WP pin assertion. Security is enhanced by three 256-byte OTP registers accessible via dedicated commands (42h/44h/48h/4Bh), while JEDEC-standard Manufacturer and Device ID (9Fh) and legacy ID (90h) ensure system-level identification robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 Kbytes) - sufficient for boot code, firmware images, and configuration data in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables high-throughput XiP execution and fast firmware updates over SPI. |
| Page Program Time | 0.4 ms (typical) - reduces firmware update latency and improves over-the-air (OTA) patch efficiency. |
| Block Erase Time | 60 ms (4 kB), 120 ms (32 kB), 200 ms (64 kB) - allows granular code/data partitioning without long downtime during field upgrades. |
| Endurance & Retention | 100,000 program/erase cycles / 20 years data retention - meets industrial lifecycle requirements for unattended operation. |
| Power Consumption | 13.3 µA standby / 1.2 µA deep power-down - extends battery life in portable and IoT edge nodes. |
| Operating Voltage | 2.5 V – 3.6 V - compatible with modern low-voltage SoCs and mixed-supply systems. |
Pinout & Package
AT25SF041B-SSHB-B is packaged in an 8-pin narrow-body SOIC (150-mil) with standard JEDEC footprint. Pin functions support SPI communication, hardware write protection, and quad-SPI I/O reconfiguration via status register control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate any command and low-to-high to terminate operations. |
| SCK | Serial Clock | Input clock; rising edge latches SI data, falling edge clocks SO data - defines timing for all SPI transfers. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary command/address/data input; becomes bidirectional I/O0 in dual/quad I/O modes for parallel bit transfer. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Standard output for read data; serves as I/O1 in dual/quad modes to double/quadruple effective throughput. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Hardware write lock for status registers when QE=0; reconfigured as I/O2 in quad mode (QE=1) - requires status register setup. |
| HOLD (I/O3) | Communication Hold / Quad I/O 3 | Pauses ongoing SPI transaction without resetting state; repurposed as I/O3 in quad mode - enables seamless protocol switching. |
| VCC | Power Supply | 2.5–3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground Reference | System ground return path; must be low-impedance to maintain signal integrity during high-speed reads. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Execute-in-Place (XiP) | Enables direct CPU instruction fetch from flash using 0-4-4 command format, eliminating need for opcode retransmission and reducing read latency. |
| Erase/Program Suspend & Resume | Allows background erase or program to be paused for urgent read requests, ensuring real-time responsiveness in multitasked firmware environments. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic access to memory geometry, timing, and feature set via 5Ah command - simplifies host driver development. |
| Three 256-byte OTP Security Registers | Stores immutable keys, certificates, or device-specific secrets; programmed once and locked permanently for secure boot and anti-cloning. |
| User-Definable Memory Protection | Configurable protected region at memory start or end via status register bits, enforced by WP pin or software control - prevents accidental firmware overwrite. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with minimal external RAM. IC Role / Device Role / Timing Role: Primary non-volatile program memory supporting XiP execution and field firmware updates via quad-I/O reads and page programming. Use Value: 108 MHz quad-I/O read speed and 0.4 ms page program reduce boot time and OTA update duration, improving system uptime. | Use Scenario: Holding sensor calibration data, network credentials, and OTA update payloads in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Secure, low-power configuration store with OTP registers for credential storage and deep power-down for extended sleep cycles. Use Value: 1.2 µA deep power-down current and 20-year data retention ensure multi-year operation without maintenance or data loss. |
| Medical Diagnostic Device Boot Code | Automotive Infotainment System Assets |
Use Scenario: Hosting boot loader and safety-critical initialization routines in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Trusted boot memory with hardware write protection (WP pin) and status register locking to prevent unauthorized modification. Use Value: Non-volatile protection bits and SRP0/SRP1 configuration allow tamper-resistant firmware lockdown meeting IEC 62304 Class C requirements. | Use Scenario: Storing UI assets, voice recognition models, and map tiles in automotive head units requiring fast load times. IC Role / Device Role / Timing Role: High-bandwidth asset memory leveraging continuous read wrap and 108 MHz quad-I/O for rapid GUI rendering. Use Value: Continuous read with 64-byte wrap eliminates inter-byte delays, achieving near-parallel throughput for large binary assets. |
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 / 2.7–3.6 V dual supply, no OTP registers, different SFDP layout. | Lacks OTP security registers and 0-4-4 XiP mode; better suited for cost-sensitive consumer devices without security requirements. | Select when lower voltage operation (1.65 V) or higher clock speed is prioritized over secure boot features. |
| Micron MT25QL04A | 4 M-bit density, 133 MHz max clock, supports 0-4-4 XiP, includes 256-byte OTP, but requires different status register bit mapping for protection. | Functionally closer to AT25SF041B-SSHB-B in XiP and security, but protection configuration uses different SR bits (SRL vs SRP0/SRP1). | Choose for migration paths where 0-4-4 XiP and OTP are required, but verify status register initialization sequence compatibility. |
Compared with W25Q40EW and MT25QL04A, the AT25SF041B-SSHB-B provides native 2.5–3.6 V operation without dual-supply complexity, deterministic 0-4-4 XiP timing, and integrated WP pin-based protection - making it optimal for industrial and medical designs requiring predictable, secure, low-power flash behavior.
Availability
AT25SF041B-SSHB-B is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge nodes, and medical diagnostic devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF041B-SSHB-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-SSHB-B belongs to Renesas' serial flash memory product line, engineered for reliable, high-performance code storage and execute-in-place operation in space- and power-constrained embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF041B-SSHB-B?
The AT25SF041B-SSHB-B supports a maximum SPI clock frequency of 108 MHz across all supported read modes including standard, dual-output, dual-I/O, quad-output, and quad-I/O. This specification is validated under 2.5–3.6 V supply and -40°C to +85°C operating conditions, enabling high-bandwidth XiP execution and fast firmware loading in the AT25SF041B-SSHB-B.
Does the AT25SF041B-SSHB-B support execute-in-place (XiP) operation?
Yes, the AT25SF041B-SSHB-B explicitly supports execute-in-place (XiP) through its 0-4-4 quad-I/O read command (EBh), which eliminates opcode transmission overhead and enables continuous instruction fetch directly from flash. This capability is confirmed in the Product Overview section of the AT25SF041B-SSHB-B datasheet and is optimized for low-latency CPU boot and runtime code execution.
How many one-time programmable (OTP) security registers does the AT25SF041B-SSHB-B include?
The AT25SF041B-SSHB-B includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h program, 44h erase, 48h read, 4Bh unique ID). These registers are physically separate from main memory and provide immutable storage for cryptographic keys or device identifiers - a confirmed feature documented in the AT25SF041B-SSHB-B datasheet Features section.
What package type is used for the AT25SF041B-SSHB-B variant?
The AT25SF041B-SSHB-B uses an 8-pin narrow-body SOIC package (150-mil), as indicated by the "SS" prefix in the part number and confirmed in the Ordering Information section (page 55) of the AT25SF041B-SSHB-B datasheet. This JEDEC-standard package offers proven reliability and compatibility with automated PCB assembly processes.
Can the AT25SF041B-SSHB-B operate from a 2.5 V supply?
Yes, the AT25SF041B-SSHB-B supports a 2.5 V minimum supply voltage, as specified in the "Two supply voltage options" feature list: 2.5 V – 3.6 V and 2.7 V – 3.6 V. This dual-voltage capability ensures interoperability with modern low-power microcontrollers and SoCs operating at 2.5 V nominal rails, as verified in the AT25SF041B-SSHB-B DC Characteristics table.
AT25SF041B-SSHB-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SSHB-B FAQ
1.How can I place an order for AT25SF041B-SSHB-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-SSHB-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-SSHB-B reliable?
The price and inventory of AT25SF041B-SSHB-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-SSHB-B is usually 5 days.
3.What payment methods are accepted for AT25SF041B-SSHB-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-SSHB-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-SSHB-B?
AT25SF041B-SSHB-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-SSHB-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-SSHB-B?
For technical support, including AT25SF041B-SSHB-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-SSHB-B requirements.
6.How does Aetrix verify that AT25SF041B-SSHB-B is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-SSHB-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-SSHB-B meets industry standards.
7.What is the process for return or replacement of AT25SF041B-SSHB-B?
All AT25SF041B-SSHB-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-SSHB-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-SSHB-B part is unused and in its original packaging.
Return procedure for AT25SF041B-SSHB-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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