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Renesas AT25SF041-XMHD-T
- Part No.:
- AT25SF041-XMHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25SF041-XMHD-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
AT25SF041-XMHD-T from Dialog Semiconductor (formerly Adesto) 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 clock frequency, achieves 6 ns clock-to-output delay, and features uniform 4/32/64-Kbyte block erase plus full chip erase - enabling efficient firmware updates in resource-constrained IoT edge nodes.
For engineers reviewing the AT25SF041-XMHD-T datasheet, AT25SF041-XMHD-T pinout, AT25SF041-XMHD-T application, or AT25SF041-XMHD-T equivalent, this page provides verified technical context, validated pin functions, real-world use cases for code/data co-storage, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The AT25SF041-XMHD-T implements a flexible multi-granularity erase architecture with four distinct block sizes (4/32/64 Kbyte + full chip), eliminating wasted space in mixed code-and-data layouts. Its dual- and quad-I/O read modes leverage SI/SO/WP/HOLD as bidirectional I/O pins under specific opcodes (3Bh/BBh/6Bh/EBh), requiring QE bit enablement for quad operation.
It integrates three programmable security register pages for ESN storage or key locking, uses hardware WP pin control for block protection, and supports deep power-down (2 µA typical) with fast resume - all compliant with industrial temperature range (−40°C to +85°C) and RoHS packaging standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbyte) - sufficient for boot code + configuration data in compact MCU-based designs. |
| Supply Voltage | 2.5V–3.6V - compatible with modern low-voltage microcontrollers without level-shifting. |
| Max Clock Frequency | 104 MHz - enables high-throughput firmware reads in time-critical boot sequences. |
| Read Latency | 6 ns tV - reduces CPU wait states during instruction fetch from external Flash. |
| Erase Granularity | Uniform 4/32/64-Kbyte blocks + full chip - allows selective firmware patching without erasing entire application image. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - suitable for field-upgradable devices with infrequent but critical updates. |
| Power Consumption | 2 µA deep power-down current - preserves battery life in always-on sensor nodes during idle periods. |
Pinout & Package
AT25SF041-XMHD-T is packaged in an 8-lead SOIC (208-mil) with standard SPI-compatible pinout and dual/quad I/O reconfiguration capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable signal; initiates all commands and places SO/SI in high-Z when deasserted. |
| SCK | Serial clock input | Controls data timing; rising edge latches input (SI), falling edge clocks output (SO/I/Ox). |
| SI (I/O0) | Serial input / Quad/Dual I/O | Carries command/address/data in standard mode; becomes I/O0 output in Dual/Quad Read modes. |
| SO (I/O1) | Serial output / Quad/Dual I/O | Outputs read data in standard mode; becomes I/O1 output in Dual/Quad Read modes. |
| WP (I/O2) | Write protect input / Quad I/O | Hardware lock for protected sectors; becomes I/O2 output in Quad Read mode (6Bh/EBh). |
| HOLD (I/O3) | Communication pause input / Quad I/O | Halts ongoing transfers without deselecting device; becomes I/O3 output in Quad Read mode. |
| VCC | Power supply | 2.5V–3.6V single supply - powers internal logic, charge pump, and I/O buffers. |
| GND | Ground reference | System ground return path for all internal circuits and I/O drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad Output Read | Enables 2× or 4× read throughput vs standard SPI - cuts boot time by up to 75% in flash-resident firmware execution. |
| Flexible Erase Architecture | Four uniform block sizes (4/32/64 Kbyte + full chip) minimize wasted space when storing both fixed code and variable data segments. |
| Security Register Pages | Three dedicated, individually lockable pages support secure device serialization, ESN storage, or encrypted key management. |
| Hardware Write Protection | WP pin enables physical sector locking - prevents accidental firmware overwrite during field updates or debug sessions. |
| Deep Power-Down Mode | 2 µA typical current draw extends battery life in intermittently active edge devices without sacrificing fast wake-up (<10 µs). |
Applications
| Industrial PLC Firmware Storage | Smart Meter Boot Code Retention |
|---|---|
|
Use Scenario: Storing bootloader and application firmware in programmable logic controllers where field updates must preserve calibration data. IC Role / Device Role / Timing Role: Non-volatile code storage with selective 4-Kbyte erase - isolates firmware patches from persistent parameter sectors. Use Value: Enables safe over-the-air updates without risking corruption of factory-trimmed ADC coefficients or communication stack parameters. |
Use Scenario: Holding certified metrology firmware and cryptographic keys in utility-grade smart meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: Secure, long-retention Flash with lockable security registers - stores AES keys and regulatory firmware signatures. Use Value: Meets IEC 62056 compliance via hardware-enforced write protection and 20-year data retention at 85°C. |
| Wearable Sensor Hub Code Shadowing | White Goods UI Controller Memory |
|
Use Scenario: Shadowing application code from Flash into RAM on ultra-low-power MCUs in hearables and fitness trackers. IC Role / Device Role / Timing Role: High-speed 104 MHz Quad-I/O interface - reduces boot latency to <15 ms for responsive user interface startup. Use Value: Achieves sub-20 ms cold boot using 6 ns tV and continuous read mode, extending battery runtime between charges. |
Use Scenario: Storing localized UI assets (icons, fonts, language strings) and appliance-specific control logic in refrigerator/microwave controllers. IC Role / Device Role / Timing Role: Dual-I/O read with 32-Kbyte block erase - allows regional firmware variants to be updated independently. Use Value: Supports CE/FCC-certified regional SKUs without redesigning PCB layout or changing memory footprint. |
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-SSHD-T | Successor part with enhanced reliability, same pinout and command set; supports extended temperature range (−40°C to +105°C). | Required for automotive cabin modules or industrial drives operating above 85°C ambient. | Select AT25SF041B-SSHD-T for new designs needing extended temp rating and longer product lifecycle support. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI Flash with Quad I/O, 133 MHz max clock, but no hardware WP pin or dedicated security registers. | Suitable for cost-sensitive consumer electronics where cryptographic key storage is handled externally. | Choose W25Q40EWUXIE only when security register functionality is unnecessary and higher clock speed justifies different command mapping. |
Compared with AT25SF041-XMHD-T, the AT25SF041B-SSHD-T offers extended temperature operation and improved endurance, while the W25Q40EWUXIE trades security features for higher speed and broader distributor availability - making each viable only within their validated thermal, security, and compatibility boundaries.
Availability
AT25SF041-XMHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, smart meter boot code retention, wearable sensor hub code shadowing, and white goods UI controller memory requiring stable component supply across extended production lifecycles.
Supply support for AT25SF041-XMHD-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 its high-performance non-volatile memory portfolio, including serial Flash, to industrial and IoT markets.
The AT25SF041 product line was engineered for mixed code-and-data storage in space-constrained embedded systems, emphasizing erase efficiency, low-power operation, and hardware security - targeting applications from energy meters to portable medical devices.
FAQ
What is the maximum operating frequency supported by AT25SF041-XMHD-T?
The AT25SF041-XMHD-T supports up to 104 MHz for Quad-I/O and Dual-I/O read operations, and up to 85 MHz for standard Read Array (0Bh) and Dual-Output Read (3Bh). This frequency enables high-throughput firmware loading in boot-critical applications. The actual achievable speed depends on PCB layout, signal integrity, and host controller drive strength - verified in the DS-25SF041–044J–9/2023 datasheet timing tables.
Does AT25SF041-XMHD-T support Quad-I/O mode out of the box?
No - AT25SF041-XMHD-T requires the Quad Enable (QE) bit in Status Register Byte 2 to be set before Quad-I/O commands (6Bh/EBh) function. This is done via Write Status Register (01h) after issuing Write Enable (06h). The QE bit defaults to 0 at power-up, so initialization code must explicitly configure it. Failure to set QE results in unrecognized opcodes or fallback to standard SPI mode.
How does the hardware write protection work on AT25SF041-XMHD-T?
The WP pin on AT25SF041-XMHD-T provides hardware-controlled locking of protected memory blocks. When WP is driven low, selected sectors (configured via status register bits) become read-only - preventing accidental program/erase even if valid commands are sent. WP is internally pulled high, so leaving it unconnected enables normal write access; external pull-up is recommended for robustness.
What package type is used for AT25SF041-XMHD-T?
AT25SF041-XMHD-T uses an 8-lead SOIC package with 208-mil body width (standard JEDEC MS-012AC). This through-hole-compatible surface-mount package ensures mechanical stability and thermal performance in industrial environments, and is pin-compatible with other Adesto/Dialog 8-pin serial Flash variants like AT25SF041-SSHD-T.
Is AT25SF041-XMHD-T suitable for automotive applications?
AT25SF041-XMHD-T is rated for the full industrial temperature range (−40°C to +85°C) and meets RoHS requirements, but it is not AEC-Q100 qualified. For automotive cabin or infotainment applications requiring qualification, Dialog recommends the pin-compatible successor AT25SF041B-SSHD-T, which supports −40°C to +105°C and has enhanced reliability testing aligned with automotive standards.
AT25SF041-XMHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 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-TSSOP
AT25SF041-XMHD-T FAQ
1.How can I place an order for AT25SF041-XMHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-XMHD-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-XMHD-T reliable?
The price and inventory of AT25SF041-XMHD-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-XMHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF041-XMHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-XMHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-XMHD-T?
AT25SF041-XMHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-XMHD-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-XMHD-T?
For technical support, including AT25SF041-XMHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-XMHD-T requirements.
6.How does Aetrix verify that AT25SF041-XMHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041-XMHD-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-XMHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF041-XMHD-T?
All AT25SF041-XMHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-XMHD-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-XMHD-T part is unused and in its original packaging.
Return procedure for AT25SF041-XMHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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