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Renesas AT25SF041-SHD-T
- Part No.:
- AT25SF041-SHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF041-SHD-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,074
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Product details
Overview
AT25SF041-SHD-T from Dialog Semiconductor is a 4-Mbit serial Flash memory IC designed for code shadowing and data storage in embedded systems. It operates from a single 2.5V–3.6V supply, supports SPI Modes 0/3, delivers up to 104 MHz read frequency with 6 ns clock-to-output delay, and features uniform 4/32/64-Kbyte block erase plus full chip erase - enabling efficient firmware updates and parameter logging in resource-constrained IoT edge nodes.
For engineers reviewing the AT25SF041-SHD-T datasheet, AT25SF041-SHD-T pinout, AT25SF041-SHD-T application, or AT25SF041-SHD-T equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for industrial-grade serial Flash selection.
Technical Context
The AT25SF041-SHD-T implements a flexible SPI-based Flash architecture with dual- and quad-I/O read modes enabled via configurable status register bits (e.g., Quad Enable). Its memory array is partitioned into 4-Kbyte sectors and 64-Kbyte blocks, supporting byte/page programming (1–256 bytes) and hardware write protection via the WP pin.
It integrates three programmable security register pages for ESN storage or key locking, uses standard JEDEC manufacturer/device ID reads, and achieves 100,000 program/erase cycles with 20-year data retention across –40°C to +85°C - meeting full industrial temperature requirements without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes), sufficient for boot code + configuration + firmware patch storage in microcontroller-based devices. |
| Supply Voltage | 2.5V–3.6V single supply - compatible with 3.3V I/O domains and eliminates need for level shifters in most host MCU interfaces. |
| Max Read Frequency | 104 MHz (Quad-I/O mode) - enables >40 MB/s effective throughput, reducing boot time and OTA update latency. |
| Read Latency | 6 ns clock-to-output (tV) - ensures deterministic timing margins for high-speed SPI masters with tight setup/hold windows. |
| Erase Granularity | Uniform 4-Kbyte, 32-Kbyte, 64-Kbyte blocks + full chip - allows precise firmware module updates without erasing unrelated data sections. |
| Endurance & Retention | 100,000 P/E cycles / 20 years data retention - validated for long-life industrial logging and field-upgradable control systems. |
| Power Consumption | 2 µA deep power-down current - supports ultra-low-power sleep states in battery-operated sensors and wearables. |
Pinout & Package
AT25SF041-SHD-T is packaged in an 8-lead SOIC (208-mil) with standard SPI-compatible pinout. All pins support dual- and quad-I/O functions under command control, with hardware write protection and hold functionality integrated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; rising edge terminates operations and places SO/SI in high-Z - required for multi-device SPI bus arbitration. |
| SCK | Serial clock input | Master-generated clock; data latched on rising edge (SI), output on falling edge (SO/I/Ox) - defines timing for all commands and transfers. |
| SI (I/O0) | Serial input / Quad I/O | Command/address/data input in standard mode; becomes bidirectional I/O0 in Dual/Quad modes - enables 2-bit or 4-bit parallel data transfer per clock cycle. |
| SO (I/O1) | Serial output / Quad I/O | Data output in standard/Dual mode; becomes I/O1 in Quad mode - critical for high-throughput read acceleration without increasing clock frequency. |
| WP (I/O2) | Write protect input / Quad I/O | Hardware lock for protected blocks when low; reconfigured as I/O2 in Quad mode - provides both security and bandwidth scaling in one pin. |
| HOLD (I/O3) | Communication pause input / Quad I/O | Halts ongoing transfers without deselecting device; becomes I/O3 in Quad mode - preserves state during host interrupt servicing. |
| VCC | Power supply | 2.5V–3.6V core and I/O supply - decoupling required per datasheet layout guidelines to maintain signal integrity at 104 MHz. |
| GND | Ground reference | Common return path for VCC and all I/O signals - must be low-inductance connection to minimize noise coupling in high-speed reads. |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad-I/O Read Support | Enables 2× or 4× read bandwidth vs. standard SPI - reduces firmware load time by up to 75% in boot-critical applications. |
| Flexible Erase Architecture | 4/32/64-Kbyte uniform blocks allow selective firmware updates without disturbing calibration data or user settings stored elsewhere. |
| Three Security Register Pages | Individually lockable nonvolatile pages for secure device serialization, ESN storage, or encrypted key management - no external secure element needed. |
| Hardware Write Protection | WP pin directly controls block locking independent of software state - prevents accidental overwrites during power transients or firmware faults. |
| Deep Power-Down Mode | 2 µA typical current draw - extends battery life in always-on sensor nodes while retaining full memory contents. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware and I/O mapping tables in programmable logic controllers with field upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access and granular erase - serves as primary boot memory and runtime parameter store. Use Value: 4-Kbyte sector erase enables patch-level updates without full reflash, minimizing downtime during maintenance windows. | Use Scenario: Holding calibrated sensor offsets, patient-specific therapy profiles, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention data archive with hardware write protection - ensures data integrity across 10+ year product lifecycles. Use Value: Three locked security register pages store cryptographic keys and unique device IDs, satisfying IEC 62304 traceability requirements. |
| Smart Energy Meter Boot Code | Automotive Body Control Module Logging |
Use Scenario: Hosting bootloader and metering firmware in ANSI C12.22-compliant smart meters requiring remote firmware validation and rollback. IC Role / Device Role / Timing Role: SPI Flash executing code-in-place (XIP) or shadowing to RAM - supports secure boot chain verification before execution. Use Value: 104 MHz Quad-I/O read speed enables sub-100ms firmware authentication and load, meeting ANSI/IEEE 1374.2 timing constraints. | Use Scenario: Recording fault codes, door/window status history, and lighting configuration changes in automotive BCMs operating across extended temperature ranges. IC Role / Device Role / Timing Role: Industrial-temp-rated nonvolatile memory interfaced to CAN-connected microcontrollers - retains data through cold cranking and thermal cycling. Use Value: Full –40°C to +85°C operation with 20-year retention ensures log validity over vehicle lifetime without refresh cycles. |
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-T | Successor part with enhanced reliability, same pinout and command set; replaces AT25SF041 in new designs per Dialog's obsolescence notice. | Identical use cases but qualified for longer-term production; supports same industrial temp range and security features. | Select AT25SF041B-SHD-T for new designs requiring guaranteed supply continuity and latest qualification. |
| W25Q40EWUXIE | 4-Mbit SPI Flash from Winbond; supports DTR Quad mode (up to 133 MHz), different security register implementation, and distinct status register bit mapping. | Requires firmware adaptation for security commands and QE bit handling; suitable where higher peak bandwidth is prioritized over drop-in replacement. | Choose W25Q40EWUXIE only after validating command compatibility and performing full system-level endurance testing. |
Compared with AT25SF041-SHD-T, the AT25SF041B-SHD-T offers identical functionality with improved process reliability and lifecycle assurance, while W25Q40EWUXIE delivers higher maximum clock rates but demands interface layer modifications - making the B-version the preferred upgrade path for minimal risk.
Availability
AT25SF041-SHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and smart energy meter boot code requiring stable component supply and long-term obsolescence management.
Supply support for AT25SF041-SHD-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
Dialog Semiconductor, acquired Adesto Technologies in 2021 and now delivers high-performance, low-power memory solutions for industrial and IoT applications.
The AT25SF041 product line was originally developed by Adesto for cost-sensitive, high-reliability embedded Flash applications requiring flexible erase granularity and integrated security - targeting code+data co-storage in space-constrained devices.
FAQ
What is the operating voltage range of the AT25SF041-SHD-T?
The AT25SF041-SHD-T operates from a single 2.5V to 3.6V supply. This range aligns with standard 3.3V logic interfaces and eliminates the need for external voltage translation in most microcontroller-based systems. Operation outside this window may cause unpredictable behavior or data corruption, and is not supported per the DS-25SF041–044J–9/2023 datasheet.
Does the AT25SF041-SHD-T support Quad-I/O read mode?
Yes, the AT25SF041-SHD-T supports Quad-I/O read mode using the EBh opcode, provided the Quad Enable (QE) bit in the status register is set. In this mode, SI, SO, WP, and HOLD function as I/O0–I/O3, delivering four bits per clock cycle and enabling up to 104 MHz operation - confirmed in Section 6.5 of the official datasheet.
How many program/erase cycles does the AT25SF041-SHD-T guarantee?
The AT25SF041-SHD-T guarantees 100,000 program/erase cycles per memory location, as specified in the datasheet's "Endurance" parameter. This rating applies across the full industrial temperature range (–40°C to +85°C) and is validated per JEDEC standards for serial Flash reliability.
What package type is used for the AT25SF041-SHD-T?
The AT25SF041-SHD-T uses an 8-lead SOIC package with 208-mil body width (standard JEDEC MS-012AC), as explicitly listed in the "Industry Standard Green Package Options" section of the datasheet. This package is lead-free, halide-free, and RoHS compliant.
Is the AT25SF041-SHD-T still recommended for new designs?
No - the AT25SF041-SHD-T is marked "Not recommended for new designs. Use AT25SF041B." in the official datasheet (DS-25SF041–044J–9/2023). While fully functional and supported for existing production, Dialog recommends migrating to the AT25SF041B-SHD-T for long-term supply assurance and updated qualification.
AT25SF041-SHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT25SF041-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-SHD-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 AT25SF041-SHD-T reliable?
The price and inventory of AT25SF041-SHD-T 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-T is usually 5 days.
3.What payment methods are accepted for AT25SF041-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-SHD-T?
AT25SF041-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-SHD-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 AT25SF041-SHD-T?
For technical support, including AT25SF041-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-SHD-T requirements.
6.How does Aetrix verify that AT25SF041-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041-SHD-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 AT25SF041-SHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF041-SHD-T?
All AT25SF041-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-SHD-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 AT25SF041-SHD-T part is unused and in its original packaging.
Return procedure for AT25SF041-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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