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Renesas AT25SF041B-MAHB-T
- Part No.:
- AT25SF041B-MAHB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25SF041B-MAHB-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:257,546
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Product details
Overview
AT25SF041B-MAHB-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 features 4 kB/32 kB/64 kB block erase, 256-byte page programming, and OTP security registers.
For engineers reviewing the AT25SF041B-MAHB-T datasheet, AT25SF041B-MAHB-T pinout, AT25SF041B-MAHB-T application, or AT25SF041B-MAHB-T equivalent, key selection considerations include quad-SPI timing compliance, deep power-down current (1.2 µA), SFDP register support, WP/HOLD pin dual-function behavior, and 20-year data retention under industrial temperature range (–40°C to +85°C).
Technical Context
The AT25SF041B-MAHB-T implements a flexible SPI interface with hardware-selectable modes (0 and 3), supports command-based 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, and includes dedicated status registers for volatile/non-volatile protection control. Its memory array is organized into 128 × 4 kB blocks with hierarchical erase granularity.
It integrates on-die SRAM data buffer, Y/X-decoding logic, and quad-SPI I/O buffers enabling concurrent address/data transfer on I/O0–I/O3 pins during quad-I/O operations. The device uses JEDEC-standard Manufacturer and Device ID (0x1F 0x85) and supports Serial Flash Discoverable Parameters (SFDP) for host auto-configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB) nonvolatile flash array with uniform 4 kB erasable sectors |
| Max Clock Frequency | 108 MHz for fast read - enables sub-100 ns effective access time in quad-I/O mode |
| Supply Voltage | 2.5 V–3.6 V - compatible with modern low-voltage microcontrollers and SoCs |
| Erase Time (4 kB) | 60 ms typical - allows rapid firmware patching without system stall |
| Page Program Time | 0.4 ms typical for 1–256 bytes - supports efficient runtime parameter updates |
| Deep Power-Down Current | 1.2 µA typical - extends battery life in always-on IoT edge nodes |
| Data Retention | 20 years at +85°C - meets long-lifecycle industrial and automotive requirements |
Pinout & Package
AT25SF041B-MAHB-T is packaged in an 8-pin DFN (2 mm × 3 mm × 0.6 mm), RoHS-compliant, green package with wettable flanks. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate any command sequence |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO) |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Command/address input in standard SPI; becomes bidirectional I/O0 in dual/quad modes |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Data output in standard SPI; becomes bidirectional I/O1 in dual/quad modes |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write-protection when QE=0; functions as I/O2 when QE=1 (Status Register 2) |
| HOLD (I/O3) | Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state; functions as I/O3 when QE=1 |
| VCC | Power Supply | 2.5–3.6 V core supply; requires local 100 nF decoupling capacitor |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Fast Read (0-4-4) | Eliminates opcode transmission overhead, enabling continuous burst reads without command reissue |
| Erase/Program Suspend & Resume | Allows host to temporarily halt background flash operations to service higher-priority interrupts |
| 3×256-byte OTP Security Registers | Stores immutable keys or calibration data; erased only via dedicated 44h command |
| User-Definable Memory Protection | Configurable lock bits (SRP0/SRP1) protect start/end regions of memory array against accidental writes |
| SFDP Register Support | Enables automatic host detection of timing parameters, voltage ranges, and command sets without hard-coded assumptions |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary nonvolatile program memory providing XiP-capable boot code and field-upgradable application binaries. Use Value: 20-year data retention and –40°C to +85°C operation ensure reliable firmware persistence across extended maintenance cycles. | Use Scenario: Hosting bootloader and sensor firmware in battery-powered wireless sensor nodes with multi-year deployment lifespans. IC Role / Device Role / Timing Role: Low-power serial flash delivering fast boot sequences and secure OTA update storage. Use Value: 1.2 µA deep power-down current minimizes quiescent drain, while quad-I/O read accelerates firmware validation pre-boot. |
| Automotive Infotainment HMI | Medical Diagnostic Device Code Storage |
Use Scenario: Storing GUI assets, voice prompts, and application logic in automotive head units requiring AEC-Q100 alignment. IC Role / Device Role / Timing Role: High-speed SPI flash supporting real-time graphics rendering and responsive UI navigation via XiP execution. Use Value: 108 MHz quad-I/O bandwidth delivers >40 MB/s effective throughput, reducing UI latency during multimedia playback. | Use Scenario: Securing critical diagnostic algorithms and calibration data in portable ultrasound or ECG devices subject to regulatory audit. IC Role / Device Role / Timing Role: Trusted firmware repository with OTP registers for cryptographic keys and tamper-evident firmware signing. Use Value: Three independent 256-byte OTP banks enable separation of root keys, device-specific secrets, and revision-controlled calibration values. |
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; no OTP registers | Lacks 3×256-byte OTP security registers and SFDP v1.6+ support; different status register layout | Preferred where higher clock speed is prioritized over security features and legacy SPI compatibility is required |
| Micron MT25QL04A | 4 M-bit density, 133 MHz max clock, 2.7–3.6 V supply; supports octal DTR mode beyond quad-I/O | Includes octal DTR capability and enhanced security (secure OTP, unique ID); larger die size and different pinout | Chosen when future-proofing for higher bandwidth interfaces or requiring NIST-aligned secure boot extensions |
Compared with Winbond W25Q40EW and Micron MT25QL04A, the AT25SF041B-MAHB-T offers balanced performance, industrial-grade reliability, integrated OTP security, and full SFDP compliance - making it optimal for cost-sensitive, security-aware embedded designs needing proven quad-SPI interoperability without octal complexity.
Availability
AT25SF041B-MAHB-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node boot memory, and automotive infotainment HMI requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25SF041B-MAHB-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, infrastructure, and IoT markets.
The AT25SF041B belongs to Renesas' serial NOR flash product line, engineered for robustness in resource-constrained embedded systems requiring fast boot, secure firmware storage, and low-power operation across extended temperature ranges.
FAQ
What is the maximum supported SPI clock frequency for AT25SF041B-MAHB-T in quad-I/O mode?
The AT25SF041B-MAHB-T supports up to 108 MHz in all quad-I/O read modes (1-4-4 and 0-4-4). This frequency is validated per AC characteristics in the datasheet (Rev. K, Table 13.4) and enables sustained read throughput exceeding 40 MB/s when using continuous burst commands. Operation above this frequency risks setup/hold violations and is not guaranteed.
Does AT25SF041B-MAHB-T support execute-in-place (XiP) functionality?
Yes, the AT25SF041B-MAHB-T explicitly supports XiP through three hardware-enabling features: quad-SPI interface (1-4-4/0-4-4), continuous read mode eliminating opcode overhead, and 108 MHz maximum clock rate. These allow direct instruction fetch from flash without copying to RAM, reducing boot time and memory footprint in microcontroller-based systems.
How does the WP pin function in AT25SF041B-MAHB-T when Quad Enable (QE) is set?
When the Quad Enable (QE) bit in Status Register 2 is set to 1, the WP pin on the AT25SF041B-MAHB-T functions exclusively as I/O2 in dual/quad-SPI commands and cannot be used for hardware write protection. Write protection must then be managed entirely via status register bits (SRP0/SRP1) and software commands - the physical WP pin loses its protection assertion capability.
What is the purpose of the three 256-byte OTP security registers in AT25SF041B-MAHB-T?
The AT25SF041B-MAHB-T includes three independent 256-byte One-Time Programmable (OTP) security registers used to store immutable data such as cryptographic keys, device-specific calibration constants, or firmware signature roots. Once programmed, they cannot be altered or erased except via the dedicated Erase Security Registers (44h) command - which permanently clears all three banks.
Can AT25SF041B-MAHB-T operate across the full industrial temperature range?
Yes, the AT25SF041B-MAHB-T is fully specified for operation from –40°C to +85°C ambient temperature. All electrical parameters - including 108 MHz read timing, 1.2 µA deep power-down current, and 100,000 program/erase endurance - are guaranteed across this range, making it suitable for uncontrolled industrial and outdoor embedded deployments.
AT25SF041B-MAHB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25SF041B-MAHB-T FAQ
1.How can I place an order for AT25SF041B-MAHB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041B-MAHB-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-MAHB-T reliable?
The price and inventory of AT25SF041B-MAHB-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-MAHB-T is usually 5 days.
3.What payment methods are accepted for AT25SF041B-MAHB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041B-MAHB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041B-MAHB-T?
AT25SF041B-MAHB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041B-MAHB-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-MAHB-T?
For technical support, including AT25SF041B-MAHB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041B-MAHB-T requirements.
6.How does Aetrix verify that AT25SF041B-MAHB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041B-MAHB-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-MAHB-T meets industry standards.
7.What is the process for return or replacement of AT25SF041B-MAHB-T?
All AT25SF041B-MAHB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041B-MAHB-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-MAHB-T part is unused and in its original packaging.
Return procedure for AT25SF041B-MAHB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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