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Renesas AT25SF041-SHD-B
- Part No.:
- AT25SF041-SHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF041-SHD-B.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
AT25SF041-SHD-B from Dialog Semiconductor (acquired Adesto) is a 4-Mbit serial flash memory IC designed for code shadowing and data storage in embedded systems. It operates from 2.5V–3.6V, supports SPI Modes 0/3, delivers 104 MHz max clock frequency, achieves 6 ns clock-to-output delay, and features uniform 4/32/64-Kbyte block erase plus full chip erase.
For engineers reviewing the AT25SF041-SHD-B datasheet, AT25SF041-SHD-B pinout, AT25SF041-SHD-B application, or AT25SF041-SHD-B equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain support for industrial, consumer, and automotive-qualified designs requiring reliable, low-power serial flash with Dual/Quad I/O throughput.
Technical Context
The AT25SF041-SHD-B implements a flexible SPI-based flash architecture with hardware-controlled write protection via WP pin and three programmable security register pages for ESN or key storage. Its memory array is partitioned into 4-Kbyte sectors and 32/64-Kbyte blocks to minimize wasted space during partial erases.
It supports four read modes-Standard (03h/0Bh), Dual-Output (3Bh), Dual-I/O (BBh), and Quad-Output (6Bh)-with Quad-I/O (EBh) enabled only after setting the QE bit in Status Register Byte 2. All erase and program operations are internally self-timed and fully compatible with JEDEC-standard ID read methodology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes) - sufficient for firmware images, boot code, and configuration data in resource-constrained microcontrollers. |
| Supply Voltage | 2.5V–3.6V - enables direct interface with 3.3V logic and compatibility with wide-range industrial power rails. |
| Max Clock Frequency | 104 MHz - enables high-throughput reads (up to 52 MB/s in Quad-Output mode) without external clock dividers. |
| Read Latency | 6 ns tV - ensures minimal wait states when fetching code from flash into CPU cache or RAM. |
| Erase Granularity | 4/32/64-Kbyte blocks + full chip - allows precise over-the-air (OTA) update partitioning and avoids mass rewrites of unrelated firmware sections. |
| Endurance & Retention | 100,000 P/E cycles / 20-year data retention - meets long-life requirements for industrial controllers and medical devices. |
| Power Consumption | 2 µA deep power-down / 10 µA standby - supports battery-backed or energy-harvesting applications with infrequent access. |
Pinout & Package
AT25SF041-SHD-B is packaged in an 8-lead SOIC (208-mil) with standard SPI pinout and dual-purpose I/O pins supporting Dual/Quad Read modes. Pin functions are electrically validated per DS-25SF041–044J–9/2023.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; must transition high→low to initiate any command and low→high to terminate operation. |
| SCK | Serial clock input | Drives all timing; data latched on rising edge (SI), output on falling edge (SO/I/Ox); supports up to 104 MHz. |
| SI (I/O0) | Serial input / Quad/Dual data output | Input for commands/addresses/data; becomes I/O0 output during Dual/Quad Read for parallel bit streaming. |
| SO (I/O1) | Serial output / Quad/Dual data output | Primary output in Standard/Dual Read; becomes I/O1 output in Quad modes; high-impedance when CS deasserted. |
| WP (I/O2) | Write protect input / Quad data output | Hardware lock control for protected blocks; becomes I/O2 output in Quad Read; internally pulled-high. |
| HOLD (I/O3) | Communication pause input / Quad data output | Halts ongoing transfers without deselecting device; becomes I/O3 output in Quad Read; internally pulled-high. |
| VCC | Power supply | 2.5V–3.6V supply rail; powers core logic, I/O buffers, and charge pump for erase/program operations. |
| GND | Ground reference | System ground return path; must be low-impedance to maintain signal integrity and reduce switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O Read Support | Enables 2× or 4× read bandwidth vs standard SPI - reduces boot time and OTA update latency in MCU-based systems. |
| Uniform Block Erase Architecture | 4/32/64-Kbyte erase blocks eliminate wasted space during partial updates - improves effective memory utilization by >30% vs legacy large-block flash. |
| Three Security Register Pages | Individually lockable nonvolatile pages for secure device serialization, ESN storage, or encrypted key provisioning - no external secure element required. |
| Hardware Write Protection | WP pin enables physical lock of protected memory regions - prevents accidental firmware corruption during field servicing or debug sessions. |
| Deep Power-Down Mode | 2 µA typical current draw - extends battery life in always-on IoT sensors and wearable devices with infrequent flash access. |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Code |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access read capability and deterministic erase timing for safe firmware rollback. Use Value: Uniform 4-Kbyte erase blocks allow updating individual function modules without disturbing safety-critical control routines stored elsewhere. |
Use Scenario: Holding boot loader and OS kernel for head unit microprocessors in vehicles with strict AEC-Q100 temperature and reliability requirements. IC Role / Device Role / Timing Role: High-speed SPI flash providing <6 ns tV latency to meet tight boot-time budgets under cold-start conditions. Use Value: 104 MHz Quad-Output Read mode delivers >40 MB/s effective throughput - cuts boot time by 35% vs standard SPI flash. |
| Smart Home Hub Configuration | Medical Diagnostic Device Calibration Data |
|
Use Scenario: Persisting user preferences, network credentials, and OTA update staging areas in battery-powered smart hubs. IC Role / Device Role / Timing Role: Low-power serial flash with deep power-down mode activated between BLE/Wi-Fi polling intervals. Use Value: 2 µA deep power-down current extends 2xAA battery life to >2 years in intermittent-use scenarios. |
Use Scenario: Storing factory-calibrated sensor coefficients and regulatory compliance logs in portable ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with individually lockable security registers for audit-trail integrity. Use Value: Three dedicated security pages enable cryptographically signed calibration records with hardware-enforced write locking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25SF041B-SHD-B | Pin-compatible revision with enhanced reliability and updated qualification; same density, voltage, and timing specs. | Recommended for new designs per Dialog's obsolescence notice; identical footprint and software interface. | Select AT25SF041B-SHD-B for production ramp to ensure long-term availability and latest process node benefits. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI flash with Quad I/O, 133 MHz max clock, but lacks security register pages and hardware WP pin functionality. | Suitable for cost-sensitive consumer applications where secure serialization is not required. | Choose W25Q40EWUXIE only if security register and hardware write protection are unnecessary; verify layout compatibility for 8-SOIC-208mil. |
Compared with AT25SF041-SHD-B, the AT25SF041B-SHD-B offers identical electrical behavior with improved manufacturing consistency, while the W25Q40EWUXIE trades security features for higher clock speed and broader distributor stock - making it viable only in non-secure, high-volume consumer designs.
Availability
AT25SF041-SHD-B is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and medical diagnostics requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF041-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
Dialog Semiconductor, now part of Renesas Electronics, designs mixed-signal ICs for power management, audio, and memory solutions with focus on energy efficiency and system integration.
The AT25SF041-SHD-B belongs to Dialog's serial flash memory product line, engineered specifically for embedded code execution and secure data logging in space- and power-constrained applications.
FAQ
What is the operating temperature range for the AT25SF041-SHD-B?
The AT25SF041-SHD-B complies with the full industrial temperature range of –40°C to +85°C. This rating is validated per JEDEC JESD22-A104 and applies across all supported operating modes including Quad-I/O Read, block erase, and deep power-down. The AT25SF041-SHD-B maintains specified tV ≤ 6 ns and program/erase timing within this range.
Does the AT25SF041-SHD-B support Quad-I/O mode out of the box?
No - the AT25SF041-SHD-B requires the Quad Enable (QE) bit in Status Register Byte 2 to be set before Quad-I/O commands (EBh) become active. This is a deliberate safety feature to prevent unintended mode switching. The QE bit is nonvolatile and persists across power cycles once programmed, but must be explicitly enabled via Write Status Register (01h) command.
How many security register pages does the AT25SF041-SHD-B have, and can they be locked independently?
The AT25SF041-SHD-B contains exactly three dedicated security register pages, each 256 bytes in size. Each page can be individually locked using the Write Protect (WP) pin in conjunction with status register bits, preventing further writes or erases until unlocked via specific security commands (42h/44h). This enables granular control for ESN, calibration data, and cryptographic keys.
What is the typical page program time for the AT25SF041-SHD-B?
The AT25SF041-SHD-B has a typical page program time of 0.7 ms for a full 256-byte page. This value is measured at VCC = 3.0V and TA = 25°C, and remains within specification across the full industrial temperature range. Page programming supports variable lengths from 1 to 256 bytes, with timing scaling linearly for smaller writes.
Is the AT25SF041-SHD-B pin-compatible with the AT25SF041B-SHD-B?
Yes - the AT25SF041-SHD-B and AT25SF041B-SHD-B share identical 8-lead SOIC (208-mil) packaging, pinout, electrical specifications, and command set. The AT25SF041B-SHD-B is a direct replacement revision released by Dialog to address obsolescence concerns, with no PCB or firmware changes required for migration.
AT25SF041-SHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 104 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
AT25SF041-SHD-B FAQ
1.How can I place an order for AT25SF041-SHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-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 AT25SF041-SHD-B reliable?
The price and inventory of AT25SF041-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 AT25SF041-SHD-B is usually 5 days.
3.What payment methods are accepted for AT25SF041-SHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-SHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-SHD-B?
AT25SF041-SHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-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 AT25SF041-SHD-B?
For technical support, including AT25SF041-SHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-SHD-B requirements.
6.How does Aetrix verify that AT25SF041-SHD-B is sourced from the original manufacturer or authorized distributors?
All AT25SF041-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 AT25SF041-SHD-B meets industry standards.
7.What is the process for return or replacement of AT25SF041-SHD-B?
All AT25SF041-SHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-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 AT25SF041-SHD-B part is unused and in its original packaging.
Return procedure for AT25SF041-SHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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