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Renesas AT25SF041B-SHB-B
- Part No.:
- AT25SF041B-SHB-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF041B-SHB-B.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
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Product details
Overview
AT25SF041B-SHB-B from Renesas Electronics is a 4 M-bit SPI serial flash memory IC supporting execute-in-place (XiP), quad I/O (1-4-4, 0-4-4), dual I/O (1-2-2), and standard SPI modes 0/3. It operates at up to 108 MHz, delivers 0.4 ms typical page program time, and features 3×256-byte OTP security registers for firmware integrity in embedded boot applications.
For engineers reviewing the AT25SF041B-SHB-B datasheet, AT25SF041B-SHB-B pinout, AT25SF041B-SHB-B application, or AT25SF041B-SHB-B equivalent, this device is selected for high-speed code storage in resource-constrained microcontroller systems requiring low-power deep power-down (1.2 µA), flexible memory protection, and JEDEC-standard SFDP parameter discovery.
Technical Context
The AT25SF041B-SHB-B implements a unified SPI interface with dynamic pin multiplexing: SI/SO/WP/HOLD serve as I/O0–I/O3 during quad/dual I/O operations, enabling 1-4-4 and 0-4-4 read modes that eliminate opcode overhead and sustain continuous burst reads. Its internal architecture includes SRAM data buffers, Y/X decoders, and control logic supporting suspend/resume of erase/program cycles.
Memory organization comprises 128 × 4-kbyte blocks, with erasable granularities of 4 kB (60 ms typ), 32 kB (120 ms typ), 64 kB (200 ms typ), and full chip (1.5 s typ). Protection is enforced via status register bits (SRP0/SRP1/BPL) and hardware WP pin, while security registers are one-time programmable and isolated from main array access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 Kbytes) - supports full firmware images for mid-tier MCUs without external memory expansion. |
| Max Clock Frequency | 108 MHz - enables sub-100 ns effective read latency in quad I/O mode, critical for XiP performance. |
| Page Program Time | 0.4 ms typical - allows rapid field updates of configuration or calibration data in real-time systems. |
| Erase Granularity | 4/32/64 kB blocks + full chip - permits independent code/data partitioning with minimal wear on active regions. |
| Power Consumption | 1.2 µA deep power-down current - extends battery life in always-on IoT edge nodes between wake cycles. |
| Data Retention | 20 years - ensures long-term reliability for industrial controllers deployed in unattended environments. |
| Endurance | 100,000 program/erase cycles - supports frequent OTA update logging in automotive telematics modules. |
Pinout & Package
AT25SF041B-SHB-B is supplied in an 8-pin narrow-body SOIC (150-mil) package per ordering code "SHB", with gull-wing leads and RoHS-compliant finish.
| 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-ensures deterministic SPI session boundaries. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI/I/O0), falling edge clocks output (SO/I/O1)-defines strict timing alignment for all SPI modes. |
| 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-enables 2- or 4-bit parallel data transfer per SCK cycle. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Standard output for single-I/O reads; functions as I/O1 in dual/quad modes-supports simultaneous 2-/4-bit data streaming without bus turnaround delay. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write lock for status registers when QE=0; repurposed as I/O2 in quad mode-prevents accidental configuration changes during firmware execution. |
| HOLD (I/O3) | Communication Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfers without resetting state machine; serves as I/O3 in quad mode-enables priority interrupt handling in real-time hosts. |
| VCC | Supply Voltage | 2.5–3.6 V operation-compatible with both 3.3 V and 2.5 V system rails, reducing need for level-shifting circuitry. |
| GND | Ground Reference | Common return path for all digital and analog circuitry-must be low-impedance to maintain signal integrity during high-speed quad I/O bursts. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O Read (1-4-4, 0-4-4) | Eliminates opcode transmission overhead, enabling true continuous burst reads ideal for XiP execution from flash. |
| Erase/Program Suspend & Resume | Allows host CPU to service interrupts or process data mid-operation without aborting or reinitializing flash programming. |
| 3×256-byte OTP Security Registers | Stores immutable keys or hashes for secure boot verification, physically isolated from main memory array. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic access to memory geometry, timing, and command set via 5Ah command. |
| User-Definable Memory Protection | Enables software-configurable lock of top/bottom sectors (e.g., bootloader region) using status register bits and WP pin. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing ladder logic and runtime parameters in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Non-volatile code and data storage with execute-in-place capability, delivering deterministic instruction fetch timing under 108 MHz quad I/O. Use Value: Eliminates external RAM requirement for boot code, reduces BOM cost and board space while maintaining 20-year data retention at 85°C. |
Use Scenario: Holding sensor calibration profiles, network credentials, and OTA update staging areas in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power persistent storage with 1.2 µA deep power-down and fast 0.4 ms page writes for infrequent parameter updates. Use Value: Extends multi-year battery life by minimizing active current draw and enabling rapid field updates without full memory reprogramming. |
| Automotive Telematics Bootloader | Consumer Audio DSP Code Storage |
Use Scenario: Securing primary bootloader and cryptographic keys in vehicle infotainment gateways subject to AEC-Q100 stress requirements. IC Role / Device Role / Timing Role: Trusted firmware root-of-trust component leveraging OTP security registers and hardware write protection. Use Value: Prevents unauthorized firmware modification via physical WP pin assertion and one-time programmable key storage. |
Use Scenario: Hosting audio processing algorithms and equalization presets in portable Bluetooth speakers with tight PCB area constraints. IC Role / Device Role / Timing Role: High-density serial flash providing 4 M-bit code space in compact 150-mil SOIC footprint. Use Value: Enables feature-rich DSP functionality without requiring larger packages or parallel NOR flash, simplifying layout and sourcing. |
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 | Same 4 M-bit density and 104 MHz max clock, but lacks 0-4-4 continuous read mode and OTP security registers. | Supports basic XiP but not optimized for ultra-low-latency continuous instruction fetch; no hardware key storage. | Select when cost sensitivity outweighs need for continuous-read optimization and secure boot features. |
| Micron MT25QL04A | 4 M-bit, 133 MHz max clock, supports SFDP v1.6 and octal DTR mode; requires different status register configuration. | Better peak bandwidth for high-throughput data logging; higher pin count (16-pin SOIC or DFN) increases layout complexity. | Select when migrating to higher-speed platforms or requiring future-proof SFDP extensibility beyond v1.5. |
Compared with Winbond W25Q40EW and Micron MT25QL04A, the AT25SF041B-SHB-B uniquely combines 0-4-4 continuous read for lowest XiP latency, integrated OTP security registers for secure boot, and 150-mil SOIC packaging-making it optimal for cost-sensitive, space-constrained, and security-aware embedded designs.
Availability
AT25SF041B-SHB-B is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node configuration, and automotive telematics bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for AT25SF041B-SHB-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT markets.
The AT25SF041B belongs to Renesas' serial flash memory product line, engineered specifically for embedded systems demanding high reliability, low power, and execute-in-place capability in space-constrained designs.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF041B-SHB-B?
The AT25SF041B-SHB-B supports a maximum SPI clock frequency of 108 MHz in quad I/O (1-4-4) and dual I/O (1-2-2) modes. This rating is validated under specified VCC (2.7–3.6 V) and temperature (-40°C to +85°C) conditions per the official Renesas datasheet DS-AT25SF041B-190 Rev. K. Higher frequencies are not guaranteed and may result in read errors or timing violations.
Does the AT25SF041B-SHB-B support execute-in-place (XiP) operation?
Yes, the AT25SF041B-SHB-B explicitly supports execute-in-place (XiP) through three key features: quad-SPI interface (1-4-4, 0-4-4), continuous read mode that eliminates opcode transmission, and high 108 MHz clock rate. These reduce instruction fetch latency and enable direct CPU execution from flash memory without loading into RAM first.
How many one-time programmable (OTP) security registers does the AT25SF041B-SHB-B include?
The AT25SF041B-SHB-B includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h/44h/48h). Once programmed, these registers cannot be erased or rewritten, making them suitable for storing immutable cryptographic keys, device identifiers, or secure boot hashes.
What package type is used for the AT25SF041B-SHB-B variant?
The AT25SF041B-SHB-B uses an 8-pin narrow-body SOIC package (150-mil width), as indicated by the "SHB" suffix in the part number. This JEDEC-standard package features gull-wing leads, RoHS compliance, and a 1.27 mm lead pitch-optimized for automated assembly and legacy PCB footprints.
Can the AT25SF041B-SHB-B operate from a 2.5 V supply?
Yes, the AT25SF041B-SHB-B supports dual supply voltage ranges: 2.5 V–3.6 V and 2.7 V–3.6 V. Operation at 2.5 V is fully specified, including AC timing, program/erase characteristics, and deep power-down current (1.2 µA typ), enabling compatibility with low-voltage microcontroller domains.
AT25SF041B-SHB-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 108 MHz
- Write Cycle Time - Word, Page:
- 50µs, 800µs
- Access Time:
- 7 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF041B-SHB-B FAQ
1.How can I place an order for AT25SF041B-SHB-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-SHB-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-SHB-B reliable?
The price and inventory of AT25SF041B-SHB-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-SHB-B is usually 5 days.
3.What payment methods are accepted for AT25SF041B-SHB-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-SHB-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-SHB-B?
AT25SF041B-SHB-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-SHB-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-SHB-B?
For technical support, including AT25SF041B-SHB-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-SHB-B requirements.
6.How does Aetrix verify that AT25SF041B-SHB-B is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-SHB-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-SHB-B meets industry standards.
7.What is the process for return or replacement of AT25SF041B-SHB-B?
All AT25SF041B-SHB-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-SHB-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-SHB-B part is unused and in its original packaging.
Return procedure for AT25SF041B-SHB-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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