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Renesas AT25SF041B-SSHB-T
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- Part No.:
- AT25SF041B-SSHB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF041B-SSHB-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:46,444
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Product details
Overview
AT25SF041B-SSHB-T 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 delivers fast read performance via 1-4-4 and 0-4-4 command modes and integrates OTP security registers and SFDP support.
For engineers reviewing the AT25SF041B-SSHB-T datasheet, AT25SF041B-SSHB-T pinout, AT25SF041B-SSHB-T application, or AT25SF041B-SSHB-T equivalent, key selection criteria include XiP-read latency, quad-SPI timing compliance, deep power-down current (1.2 µA), block erase granularity (4/32/64 kB), and WP/HOLD pin dual-role configuration in quad mode.
Technical Context
The AT25SF041B-SSHB-T implements a flexible SPI interface compliant with modes 0 and 3, supporting standard (1-1-1), 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) read protocols. Its internal architecture includes SRAM data buffering, Y/X-decoding, and control logic enabling continuous wrap reads and suspend/resume during program/erase cycles.
Memory protection is implemented via non-volatile status register bits (SRP0/SRP1), user-definable protected regions at memory start/end, and hardware write-protection using the WP pin when QE = 0. The device also features three 256-byte OTP security registers accessible via dedicated commands (42h/44h/48h/4Bh).
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; supports high-throughput XiP execution with sub-10 ns effective read latency per word. |
| 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 for 1–256 byte page programming; enables rapid field updates and parameter logging. |
| 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 controllers and automotive infotainment systems. |
| Endurance | 100,000 program/erase cycles; supports frequent OTA firmware patching over product lifetime. |
Pinout & Package
AT25SF041B-SSHB-T uses an 8-pin narrow-body SOIC (150-mil) package with standard JEDEC footprint and gull-wing leads. Pin 1 is CS, pin 2 is SO/I/O1, pin 3 is WP/I/O2, pin 4 is GND, pin 5 is VCC, pin 6 is HOLD/I/O3, pin 7 is SCK, and pin 8 is SI/I/O0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low-to-high to terminate self-timed operations like erase before entering standby. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO); defines all timing windows. |
| SI (I/O0) | Serial Input / Quad I/O Lane 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 Lane 1 | Standard output lane; functions as I/O1 in dual/quad modes to double or quadruple read bandwidth. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write lock for status registers when QE=0; reconfigured as I/O2 in quad mode-cannot serve both roles simultaneously. |
| HOLD (I/O3) | Communication Hold / Quad I/O Lane 3 | Pauses ongoing SPI transaction without resetting state machine; repurposed as I/O3 when QE=1 for full quad operation. |
| VCC | Supply Voltage | 2.5–3.6 V operation; supports single-supply designs interfacing with 3.3 V microcontrollers and FPGAs. |
| GND | Ground Reference | Common return path for all digital and analog circuitry; requires low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Fast Read (1-4-4) | Enables 4-bit-per-clock read throughput up to 432 MB/s theoretical bandwidth, reducing host CPU wait states during XiP. |
| Continuous Read Mode (0-4-4) | Eliminates opcode retransmission overhead across sequential address ranges, improving sustained read efficiency by >25% vs standard 1-4-4. |
| Erase/Program Suspend & Resume | Allows background firmware update to pause and service high-priority interrupts, then resume without data loss or timing violation. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic access to timing, density, and command-set metadata-simplifies bootloader portability across flash vendors. |
| Three 256-byte OTP Security Registers | Stores immutable keys, calibration data, or device-specific identifiers; programmed once and locked permanently for secure boot chain integrity. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Code Execution |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers operating in harsh environments (-40 °C to 85 °C). IC Role / Device Role / Timing Role: Non-volatile program memory with execute-in-place (XiP) support and robust erase endurance (100K cycles) for field-upgradable control software. Use Value: Eliminates need for external RAM loading; reduces BOM count and improves startup time while maintaining 20-year data retention under thermal stress. | Use Scenario: Hosting sensor fusion algorithms and secure boot firmware on battery-powered wireless sensor nodes with multi-year deployment requirements. IC Role / Device Role / Timing Role: Low-power serial flash providing XiP execution and deep power-down (1.2 µA) between wake cycles. Use Value: Extends battery life beyond 5 years in duty-cycled applications while enabling secure OTA updates via OTP-protected keys. |
| Automotive Infotainment Boot Memory | Medical Diagnostic Device Configuration Storage |
Use Scenario: Storing boot loader and UI assets for head-unit systems requiring AEC-Q100-compliant components and fast cold-boot response. IC Role / Device Role / Timing Role: High-speed quad-I/O flash delivering 108 MHz read performance and continuous wrap reads for deterministic boot timing. Use Value: Achieves <500 ms cold-boot time via 0-4-4 mode, meeting OEM infotainment startup SLA without DRAM preloading. | Use Scenario: Holding calibrated sensor coefficients, regulatory compliance flags, and user-configurable diagnostic parameters in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store using OTP registers and non-volatile memory protection. Use Value: Ensures FDA 21 CFR Part 11 compliance by preventing unauthorized modification of calibration data through hardware-enforced write protection. |
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, 1.65–3.6 V supply, no OTP registers, SFDP v1.6 compliant. | Lacks 3×256-byte OTP security registers and 0-4-4 continuous read mode; supports only 1-4-4 and legacy commands. | Choose for cost-sensitive consumer applications where OTP and advanced XiP features are unnecessary. |
| Micron MT25QL04A | 4 M-bit density, 133 MHz max clock, 2.7–3.6 V supply, includes 3×256-byte OTP, SFDP v1.6, but no 0-4-4 mode. | Supports 1-4-4 and dual-I/O but omits 0-4-4 continuous read; deeper power-down current is 2 µA vs 1.2 µA. | Select when higher clock speed is critical and 0-4-4 optimization is not required for boot latency targets. |
Compared with W25Q40EW and MT25QL04A, the AT25SF041B-SSHB-T uniquely combines 0-4-4 continuous read, 1.2 µA deep power-down, and factory-programmable OTP registers-making it optimal for ultra-low-power XiP systems requiring secure, deterministic boot behavior.
Availability
AT25SF041B-SSHB-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF041B-SSHB-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 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 high-reliability embedded systems demanding execute-in-place operation, low-power sleep modes, and hardware-level security features.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF041B-SSHB-T?
The AT25SF041B-SSHB-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O (1-4-4) mode. This rating is validated across the full industrial temperature range (-40 °C to +85 °C) and applies to both standard and continuous read (0-4-4) operations. The device maintains timing compliance without derating when powered within its 2.5–3.6 V supply range.
Does the AT25SF041B-SSHB-T support execute-in-place (XiP) functionality?
Yes, the AT25SF041B-SSHB-T is explicitly designed for execute-in-place operation. Its 108 MHz quad-I/O interface, 0-4-4 continuous read mode, and fast page access times enable direct CPU instruction fetch from flash without intermediate RAM loading. The AT25SF041B-SSHB-T datasheet confirms XiP suitability for boot code and real-time firmware execution in resource-constrained embedded systems.
How many One-Time Programmable (OTP) security registers does the AT25SF041B-SSHB-T include?
The AT25SF041B-SSHB-T includes three 256-byte One-Time Programmable (OTP) security registers. These registers are factory-locked after programming and support secure storage of cryptographic keys, calibration data, or device-unique identifiers. Commands 42h (program), 44h (erase), 48h (read), and 4Bh (read UID) provide full access to these registers in the AT25SF041B-SSHB-T.
What package type is used for the AT25SF041B-SSHB-T?
The AT25SF041B-SSHB-T uses an 8-pin narrow-body SOIC package (150-mil width), compliant with JEDEC MS-012 standards. This surface-mount package features gull-wing leads, RoHS-compliant finish, and is optimized for automated PCB assembly in high-volume industrial and automotive applications.
Can the WP and HOLD pins be used simultaneously for write protection and hold functions in quad-I/O mode?
No-the WP and HOLD pins cannot serve their legacy functions (write protection and hold) when quad-I/O mode is enabled. When the Quad Enable (QE) bit in Status Register 2 is set to 1, both pins are reconfigured exclusively as I/O2 and I/O3 for quad-SPI communication. To use WP or HOLD functionality, QE must be cleared to 0, disabling quad mode and reverting those pins to their dedicated control roles in the AT25SF041B-SSHB-T.
AT25SF041B-SSHB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF041B-SSHB-T FAQ
1.How can I place an order for AT25SF041B-SSHB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-SSHB-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-SSHB-T reliable?
The price and inventory of AT25SF041B-SSHB-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-SSHB-T is usually 5 days.
3.What payment methods are accepted for AT25SF041B-SSHB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-SSHB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-SSHB-T?
AT25SF041B-SSHB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-SSHB-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-SSHB-T?
For technical support, including AT25SF041B-SSHB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-SSHB-T requirements.
6.How does Aetrix verify that AT25SF041B-SSHB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-SSHB-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-SSHB-T meets industry standards.
7.What is the process for return or replacement of AT25SF041B-SSHB-T?
All AT25SF041B-SSHB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-SSHB-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-SSHB-T part is unused and in its original packaging.
Return procedure for AT25SF041B-SSHB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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