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Renesas AT25SF041-MHD-T
- Part No.:
- AT25SF041-MHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25SF041-MHD-T.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
AT25SF041-MHD-T 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-MHD-T datasheet, AT25SF041-MHD-T pinout, AT25SF041-MHD-T application, or AT25SF041-MHD-T equivalent, this page provides verified specifications, validated pin functions, confirmed dual/quad I/O timing behavior, industrial temperature support (−40°C to +85°C), and RoHS-compliant 8-lead SOIC (150-mil) package details.
Technical Context
The AT25SF041-MHD-T implements a flexible SPI 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 64-Kbyte blocks, enabling efficient code/data co-location without cross-segment erase waste.
It supports four read modes-standard single-I/O (03h/0Bh), dual-output (3Bh), dual-I/O (BBh), and quad-output (6Bh)-with QE bit control in Status Register Byte 2. All program/erase operations are internally self-timed, and Deep Power-Down mode draws only 2 µA typical current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes) - sufficient for firmware images and configuration data in resource-constrained microcontrollers. |
| Supply Voltage | 2.5V–3.6V - compatible with modern low-voltage MCU I/O domains without level-shifting. |
| Max Clock Frequency | 104 MHz - enables high-throughput boot code loading and real-time data logging. |
| Read Latency | 6 ns tV (clock-to-output) - minimizes wait states during instruction fetch from external memory. |
| Erase Granularity | Uniform 4-Kbyte / 32-Kbyte / 64-Kbyte blocks + full chip - allows precise field updates without erasing unrelated code segments. |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - meets industrial lifecycle requirements for unattended operation. |
| Power Consumption | 2 µA deep power-down; 10 µA standby; 4 mA active read - supports battery-backed and energy-harvesting applications. |
Pinout & Package
AT25SF041-MHD-T uses an 8-lead SOIC (150-mil) package with standard SPI-compatible pinout and dual/quad I/O reconfiguration capability. All pins support 3.6V-tolerant inputs and are specified across full industrial temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; must transition high→low to initiate command, low→high to terminate; deselects device and places SO in high-Z. |
| SCK | Serial clock input | Controls data transfer timing; rising edge latches SI/WP/HOLD; falling edge clocks out SO/SI/WP/HOLD in multi-I/O modes. |
| SI (I/O0) | Serial input / Quad/Dual I/O | Command/address/data input in standard mode; becomes bidirectional I/O0 in dual/quad read modes for parallel data output. |
| SO (I/O1) | Serial output / Quad/Dual I/O | Data output in standard mode; becomes bidirectional I/O1 in dual/quad read modes; always outputs MSB first. |
| WP (I/O2) | Write protect input / Quad I/O | Hardware lock for protected blocks; pulled high internally; becomes I/O2 in quad read mode (6Bh/EBh). |
| HOLD (I/O3) | Communication pause input / Quad I/O | Halts ongoing SPI transfer without deselecting; pulled high internally; becomes I/O3 in quad read mode (6Bh/EBh). |
| VCC | Power supply | 2.5V–3.6V main supply; decoupling capacitor required near pin for stable high-speed operation. |
| GND | Ground reference | System ground return path; must be low-impedance and connected directly to VCC decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad Output Read | 3Bh/6Bh commands deliver 2× or 4× throughput vs standard SPI read-reducing boot time and improving real-time data streaming. |
| Flexible Erase Architecture | Independent 4-Kbyte, 32-Kbyte, and 64-Kbyte erase blocks eliminate wasted space when updating partial firmware or logging data. |
| Security Register Pages | Three dedicated, individually lockable pages for ESN, cryptographic keys, or calibration data-prevents unauthorized read/write access. |
| Hardware Write Protection | WP pin enables physical block locking independent of software state-critical for fail-safe bootloader protection. |
| Low-Power Deep Power-Down | 2 µA typical current draw extends battery life in always-on sensor nodes and IoT endpoints without sacrificing wake-up latency. |
Applications
| Industrial HMI Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing GUI assets, localization strings, and firmware update payloads in panel-mounted HMIs with limited PCB area. IC Role / Device Role / Timing Role: Nonvolatile code and data storage with fast quad-read access to minimize UI rendering latency. Use Value: 104 MHz quad-read and 6 ns tV enable sub-100 ms boot and responsive touch response without external RAM caching. |
Use Scenario: Holding calibrated sensor coefficients, patient history templates, and regulatory compliance logs in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure, long-retention data repository with hardware-locked security registers for audit-trail integrity. Use Value: Three lockable security pages and 20-year data retention meet FDA 21 CFR Part 11 electronic record requirements. |
| Automotive Telematics Boot Memory | Smart Energy Meter Firmware |
Use Scenario: Hosting boot loader and OTA update staging area in vehicle infotainment ECUs operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temp SPI Flash with robust erase granularity for safe dual-bank firmware updates. Use Value: Uniform 64-Kbyte block erase allows atomic swap of full application images without corrupting active runtime code. |
Use Scenario: Storing tariff tables, communication protocol stacks, and tamper-event logs in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Low-power, high-endurance nonvolatile memory supporting 10+ year field deployment. Use Value: 100,000 program/erase cycles and 2 µA deep power-down ensure >15 years of daily firmware patching and meter reading. |
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-MHD-T | Direct revision with enhanced reliability and updated qualification; identical pinout, timing, and command set. | Recommended for new designs per Dialog's obsolescence notice; same footprint and firmware compatibility. | Select AT25SF041B-MHD-T for production ramp; AT25SF041-MHD-T remains viable for legacy repair or continuity builds. |
| Winbond W25Q40EWUXIE | 4-Mbit SPI Flash with Quad I/O, 133 MHz max clock, but no hardware WP pin or security register pages. | Lacks hardware write protection and secure storage-requires external logic or firmware mitigation for safety-critical use. | Choose only if higher speed is prioritized over security features and board-level WP control is unnecessary. |
Compared with AT25SF041-MHD-T, the AT25SF041B-MHD-T offers identical functionality with improved process stability, while the W25Q40EWUXIE trades security and hardware protection for marginally higher clock rate-making the original part optimal where robustness and secure data handling are mandatory.
Availability
AT25SF041-MHD-T is available at Aetrix Electronics and suitable for industrial HMI, medical diagnostics, automotive telematics, and smart metering applications requiring stable component supply and long-term lifecycle support.
Supply support for AT25SF041-MHD-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 owns the AT25SF series. Dialog specializes in highly integrated mixed-signal ICs for power management, audio, and memory solutions.
The AT25SF041-MHD-T belongs to Dialog's serial Flash memory product line, engineered specifically for embedded systems needing reliable, low-power, and secure code/data storage with industrial-grade endurance and temperature performance.
FAQ
What is the operating temperature range for AT25SF041-MHD-T?
The AT25SF041-MHD-T is rated for the full industrial temperature range of −40°C to +85°C. This specification is guaranteed across all electrical parameters including read latency, erase times, and power consumption, making it suitable for deployment in harsh environments such as factory automation controllers and outdoor metering equipment. The AT25SF041-MHD-T maintains 6 ns tV and 104 MHz operation throughout this range.
Does AT25SF041-MHD-T support Quad-I/O mode, and what is required to enable it?
Yes, AT25SF041-MHD-T supports Quad-I/O Read (EBh command) but requires the Quad Enable (QE) bit in Status Register Byte 2 to be set first. This is done via the Write Status Register (01h) command after issuing Write Enable (06h). Once enabled, the SI, SO, WP, and HOLD pins function as I/O3–I/O0 during EBh reads. The AT25SF041-MHD-T does not support Quad-I/O program or erase operations-only Quad-I/O read.
How many security register pages does AT25SF041-MHD-T have, and can they be locked independently?
The AT25SF041-MHD-T contains 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 specific status register bits. Once locked, a page cannot be erased or programmed until the hardware protection is disabled-providing hardware-enforced isolation for sensitive data like ESNs or encryption keys stored in AT25SF041-MHD-T.
What is the typical page program time for AT25SF041-MHD-T, and how does it scale with data size?
The AT25SF041-MHD-T has a typical page program time of 0.7 ms for a full 256-byte page. This time is fixed regardless of actual bytes written (1–256 bytes per program command), as the internal algorithm executes a full page write cycle. Smaller writes do not reduce programming duration, so optimal usage involves batching data into aligned 256-byte pages to maximize efficiency in AT25SF041-MHD-T firmware update routines.
Is AT25SF041-MHD-T pin-compatible with AT25SF041B-MHD-T, and what changes are needed for migration?
Yes, AT25SF041-MHD-T is pin-compatible and functionally identical to AT25SF041B-MHD-T, sharing the same 8-lead SOIC (150-mil) package, pinout, command set, timing, and electrical specifications. No PCB or firmware changes are required for migration; the AT25SF041B-MHD-T is a direct replacement with enhanced process reliability. Dialog explicitly recommends AT25SF041B-MHD-T for new designs, confirming backward compatibility of AT25SF041-MHD-T in existing systems.
AT25SF041-MHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- 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-UDFN (5x6)
AT25SF041-MHD-T FAQ
1.How can I place an order for AT25SF041-MHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF041-MHD-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-MHD-T reliable?
The price and inventory of AT25SF041-MHD-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-MHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF041-MHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF041-MHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF041-MHD-T?
AT25SF041-MHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF041-MHD-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-MHD-T?
For technical support, including AT25SF041-MHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF041-MHD-T requirements.
6.How does Aetrix verify that AT25SF041-MHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF041-MHD-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-MHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF041-MHD-T?
All AT25SF041-MHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF041-MHD-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-MHD-T part is unused and in its original packaging.
Return procedure for AT25SF041-MHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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