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Renesas AT25SF081-MHD-T
- Part No.:
- AT25SF081-MHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25SF081-MHD-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
AT25SF081-MHD-T from Dialog Semiconductor (acquired Adesto) is an 8-Mbit SPI serial flash memory IC designed for code shadowing and data storage in embedded systems. It operates from a single 2.3V–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.
For engineers reviewing the AT25SF081-MHD-T datasheet, AT25SF081-MHD-T pinout, AT25SF081-MHD-T application, or AT25SF081-MHD-T equivalent, this page provides verified specifications, validated pin functions, confirmed industrial temperature operation (−40°C to +85°C), RoHS-compliant 8-lead SOIC (150-mil) package details, and real-world use context for boot code storage and firmware update storage.
Technical Context
The AT25SF081-MHD-T implements a flexible multi-granularity erase architecture with four distinct block sizes (256-byte pages, 4-Kbyte, 32-Kbyte, and 64-Kbyte blocks), enabling efficient co-location of code modules and data segments without memory waste. 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 operations.
It integrates three programmable security register pages for device serialization or ESN storage, hardware write protection via WP pin, and deep power-down mode drawing only 2 µA typical current. The device uses standard SPI command set including Read Array (03h/0Bh), Dual/Quad Output Read, and Block Erase (20h/52h/D8h), all operating up to 104 MHz with MSB-first data transfer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 bytes); sufficient for boot firmware and parameter storage in resource-constrained microcontrollers. |
| Supply Voltage | 2.3 V – 3.6 V; compatible with modern low-voltage MCU I/O domains without level shifting. |
| Max Clock Frequency | 104 MHz; enables high-throughput firmware reads and fast field updates via Quad-I/O mode. |
| Read Latency | 6 ns clock-to-output (tV); minimizes wait states during XIP (execute-in-place) execution from flash. |
| Erase Granularity | Uniform 4-Kbyte, 32-Kbyte, 64-Kbyte blocks + full chip erase; allows precise firmware partitioning and OTA update staging. |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention; suitable for long-life industrial and automotive control units. |
| Power Consumption | 2 µA deep power-down current; 10 µA standby; enables always-on systems with ultra-low quiescent power budget. |
Pinout & Package
AT25SF081-MHD-T is packaged in an industry-standard 8-lead SOIC (150-mil width, 1.27 mm pitch), RoHS-compliant and halogen-free. Pin functions are electrically validated per DS-25SF081–045K–06/2023.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; must transition high→low to initiate commands and low→high to terminate; controls SO/SI tri-state behavior. |
| 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 I/O | Primary command/address/data input; becomes I/O0 output during Dual/Quad Read modes for parallel data streaming. |
| SO (I/O1) | Serial output / Quad/Dual I/O | Primary data output; becomes I/O1 output during Dual/Quad Read modes; high-impedance when CS deasserted. |
| WP (I/O2) | Write protect input / Quad I/O | Hardware lock for protected blocks; becomes I/O2 output in Quad Read mode; internally pulled high; optional external VCC tie. |
| HOLD (I/O3) | Communication pause input / Quad I/O | Pauses ongoing transfers without deselecting device; becomes I/O3 output in Quad Read mode; internally pulled high. |
| VCC | Power supply | 2.3–3.6 V main supply; powers core logic and I/O buffers; requires local decoupling per layout guidelines. |
| GND | Ground reference | System ground return path; must be low-impedance connection to minimize noise coupling into SPI signals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual- and Quad-I/O Read Support | Enables 2× or 4× throughput vs standard SPI Read Array-critical for reducing boot time and firmware load latency. |
| Flexible Erase Architecture | Four uniform erase granularities (256B page, 4KB/32KB/64KB blocks) eliminate wasted space in mixed code+data layouts. |
| Security Register Pages | Three dedicated, individually lockable pages for secure device ID, ESN, or cryptographic key storage-no external secure element needed. |
| Hardware Write Protection | WP pin enables physical, non-volatile locking of memory regions-prevents accidental or malicious firmware overwrite. |
| Low-Power Deep Power-Down | 2 µA typical current draw extends battery life in portable or energy-harvesting applications without sacrificing wake-up speed. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Non-volatile code storage and execution source; supports XIP with 6 ns tV and 104 MHz Quad-I/O reads. Use Value: Uniform 4-Kbyte erase blocks allow safe in-field firmware patching without erasing entire application image. |
Use Scenario: Holding certified boot loader and safety-critical application code in Class II medical instruments. IC Role / Device Role / Timing Role: Trusted boot memory with hardware write protection (WP pin) and 20-year data retention. Use Value: Three security register pages store device-specific cryptographic keys and regulatory compliance identifiers. |
| Automotive Infotainment Head Unit | Smart Home Gateway Firmware |
|
Use Scenario: Hosting OS kernel, UI assets, and OTA update staging area in automotive infotainment systems. IC Role / Device Role / Timing Role: High-speed Quad-I/O flash for rapid GUI asset loading and seamless background firmware updates. Use Value: 104 MHz max clock and 6 ns tV reduce UI initialization time; 32-Kbyte block erase enables atomic update partitioning. |
Use Scenario: Storing Linux-based gateway firmware, network stack binaries, and user-configurable service modules. IC Role / Device Role / Timing Role: Low-power persistent memory supporting deep-sleep modes with 2 µA deep power-down current. Use Value: 2.3–3.6 V operation matches SoC I/O voltage; RoHS-compliant SOIC package simplifies automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25SF081B-MHD-T | Direct successor; adds enhanced write protection, improved QE bit reliability, and extended qualification for automotive AEC-Q100 Grade 3. | Required for new designs targeting automotive or long-lifecycle industrial deployments where AT25SF081 is obsolete. | Select AT25SF081B-MHD-T for all new designs; it maintains pin, package, and command compatibility while improving robustness. |
| W25Q80DVSSIQ | 8-Mbit SPI flash from Winbond; supports DTR mode, faster 133 MHz max clock, but lacks security register pages and has different status register layout. | Better suited for high-throughput consumer applications where security registers are unnecessary and DTR timing is leveraged. | Choose W25Q80DVSSIQ only if DTR support or higher clock margin is required and security register functionality is not needed. |
Compared with AT25SF081-MHD-T, the AT25SF081B-MHD-T offers backward-compatible enhancements for reliability and qualification, while W25Q80DVSSIQ trades security features for higher raw speed and DTR capability-making each optimal for distinct design priorities: legacy compatibility vs. future-proofing vs. peak bandwidth.
Availability
AT25SF081-MHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and smart home gateway firmware requiring stable component supply across extended product lifecycles.
Supply support for AT25SF081-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, now part of Renesas Electronics, specializes in highly integrated mixed-signal ICs for power management, audio, and memory solutions used in mobile, IoT, and industrial applications.
The AT25SF081-MHD-T belongs to Dialog's Adesto-branded serial flash memory product line, engineered specifically for reliable, low-power, multi-granularity code and data storage in resource-constrained embedded systems.
FAQ
What is the operating temperature range for AT25SF081-MHD-T?
The AT25SF081-MHD-T is rated for the full industrial temperature range of −40°C to +85°C, as confirmed in the official datasheet DS-25SF081–045K–06/2023. This makes AT25SF081-MHD-T suitable for deployment in harsh environments such as factory automation controllers, outdoor gateways, and vehicle-mounted electronics without thermal derating.
Does AT25SF081-MHD-T support Quad-I/O read mode, and what is required to enable it?
Yes, AT25SF081-MHD-T supports Quad-I/O Read using opcode EBh, but requires the Quad Enable (QE) bit in Status Register Byte 2 to be set first via Write Status Register (01h) command. Once enabled, SI, SO, WP, and HOLD function as I/O0–I/O3 for 4-bit-per-cycle data transfer, achieving up to 104 MHz throughput.
What package type does AT25SF081-MHD-T use, and are pin dimensions standardized?
AT25SF081-MHD-T uses an 8-lead SOIC package with 150-mil body width and 1.27 mm lead pitch, fully compliant with JEDEC MS-012. Pin 1 marking and lead coplanarity meet IPC-7351B standards, ensuring compatibility with standard reflow profiles and automated optical inspection in high-volume manufacturing.
How many program/erase cycles does AT25SF081-MHD-T guarantee, and how is endurance distributed across block types?
AT25SF081-MHD-T guarantees 100,000 program/erase cycles across all supported erase granularities-pages, 4-Kbyte blocks, 32-Kbyte blocks, 64-Kbyte blocks, and full chip erase-as specified in the datasheet. Endurance is uniform and not degraded by smaller block usage, enabling flexible wear leveling in firmware update partitions.
Is AT25SF081-MHD-T still recommended for new designs, and what is the official replacement?
No-AT25SF081-MHD-T is marked "Not recommended for new designs" and "Obsolete" in the official datasheet. Dialog recommends AT25SF081B-MHD-T as the direct replacement, which retains identical pinout, package, and command set while adding AEC-Q100 Grade 3 qualification and enhanced write protection logic for AT25SF081-MHD-T users transitioning to new projects.
AT25SF081-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:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5µs, 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)
AT25SF081-MHD-T FAQ
1.How can I place an order for AT25SF081-MHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF081-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 AT25SF081-MHD-T reliable?
The price and inventory of AT25SF081-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 AT25SF081-MHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF081-MHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF081-MHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF081-MHD-T?
AT25SF081-MHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF081-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 AT25SF081-MHD-T?
For technical support, including AT25SF081-MHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF081-MHD-T requirements.
6.How does Aetrix verify that AT25SF081-MHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF081-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 AT25SF081-MHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF081-MHD-T?
All AT25SF081-MHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF081-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 AT25SF081-MHD-T part is unused and in its original packaging.
Return procedure for AT25SF081-MHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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