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Renesas AT25SF081-XMHD-T
- Part No.:
- AT25SF081-XMHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25SF081-XMHD-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,252
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Product details
Overview
AT25SF081-XMHD-T from Dialog Semiconductor (formerly Adesto) is an 8-Mbit serial flash memory IC with SPI interface, supporting Dual-I/O and Quad-I/O read modes up to 104 MHz, 6 ns clock-to-output delay, and uniform 4/32/64-Kbyte block erase for embedded code+data storage in consumer electronics.
For engineers reviewing the AT25SF081-XMHD-T datasheet, AT25SF081-XMHD-T pinout, AT25SF081-XMHD-T application, or AT25SF081-XMHD-T equivalent, this page delivers verified electrical specs, validated pin functions, confirmed industrial temperature operation, JEDEC ID compliance, and real-world use context for boot code shadowing and secure data logging.
Technical Context
The AT25SF081-XMHD-T implements a flexible SPI-compatible flash architecture with hardware-controlled write protection via WP pin, three programmable security register pages for ESN or key storage, and dual/quad I/O read acceleration using SI/SO/WP/HOLD as bidirectional I/O pins under specific opcodes (3Bh/BBh/6Bh/EBh).
Its erase granularity-uniform 4-Kbyte, 32-Kbyte, 64-Kbyte blocks plus full-chip erase-enables efficient co-location of firmware modules and runtime data without memory waste, while Deep Power-Down mode draws only 2 µA typical current for battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1 Mbyte), sufficient for compact firmware images and configuration data storage |
| Supply Voltage | 2.3 V – 3.6 V single supply, compatible with 2.5 V and 3.3 V logic domains |
| Max Clock Frequency | 104 MHz for Quad-I/O Read, enabling 52 MB/s effective throughput with 4-bit parallel output |
| Read Latency | 6 ns clock-to-output (tV), minimizing wait states during high-speed instruction fetch |
| Erase Granularity | Uniform 4-Kbyte / 32-Kbyte / 64-Kbyte blocks + full chip erase, reducing wasted space in mixed code/data layouts |
| Endurance & Retention | 100,000 program/erase cycles and 20-year data retention at industrial temperature range (–40°C to +85°C) |
| Power Consumption | 2 µA deep power-down current (typical), 10 µA standby, 4 mA active read - optimized for low-duty-cycle applications |
Pinout & Package
AT25SF081-XMHD-T uses an 8-lead SOIC (208-mil) package with standard SPI pinout and quad-capable I/O functionality. All pins support 3.6 V tolerant inputs and are specified for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; rising edge terminates operations, falling edge initiates command sequence |
| SCK | Serial clock input | Controls timing for all SPI transfers; data latched on rising edge, output shifted on falling edge |
| SI (I/O0) | Serial input / Quad I/O | Command/address/data input; becomes I/O0 output in Dual/Quad Read modes for 2-/4-bit parallel data |
| SO (I/O1) | Serial output / Quad I/O | Data output in standard/Dual Read; becomes I/O1 in Quad modes; high-impedance when CS deasserted |
| WP (I/O2) | Write protect / Quad I/O | Hardware lock control for protected sectors; becomes I/O2 output in Quad Read (6Bh/EBh) |
| HOLD (I/O3) | Communication pause / Quad I/O | Halts SPI transfer without deselecting device; becomes I/O3 output in Quad Read modes |
| VCC | Power supply | 2.3–3.6 V 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 I/O Read Support | Enables 2× or 4× read bandwidth vs standard SPI, reducing firmware load time and bus occupancy |
| Flexible Erase Architecture | Multiple uniform block sizes eliminate memory fragmentation in mixed code-and-data applications |
| Three Security Register Pages | Individually lockable nonvolatile storage for device serialization, ESN, or encrypted keys |
| Hardware Write Protection | WP pin enables sector-level locking without software overhead or status register manipulation |
| JEDEC Standard ID Read | 9Fh command returns manufacturer (0x1F) and device (0x47) IDs for automated BOM verification |
Applications
| Consumer IoT Firmware Storage | Industrial HMI Code Shadowing |
|---|---|
Use Scenario: Storing boot firmware and OTA update images in smart home sensors with limited PCB area and battery constraints. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast Quad-I/O read enabling sub-100 ms MCU boot from flash to RAM. Use Value: 104 MHz Quad Read and 6 ns tV reduce boot latency; 2 µA deep power-down extends battery life between wake cycles. | Use Scenario: Hosting GUI assets and application logic in panel-mounted HMIs operating continuously in factory environments. IC Role / Device Role / Timing Role: Primary code memory shadowed into external SDRAM; supports in-field firmware updates via SPI. Use Value: Uniform 4-Kbyte erase allows safe over-the-air patching of individual function modules without erasing full application. |
| Medical Wearable Data Logging | Automotive Body Control Module |
Use Scenario: Recording sensor calibration data and usage logs in compact wearable health monitors requiring long-term reliability. IC Role / Device Role / Timing Role: Secure, endurance-rated data storage with programmable security registers for patient ID binding. Use Value: Three lockable security pages store cryptographic keys; 100K cycle endurance ensures >5 years of daily logging at 50 writes/day. | Use Scenario: Storing configuration profiles and diagnostic event history in 12 V automotive body controllers with wide voltage transients. IC Role / Device Role / Timing Role: Robust nonvolatile memory with hardware WP pin for fail-safe parameter locking during CAN bus reprogramming. Use Value: WP pin provides immediate, glitch-immune sector protection independent of MCU firmware state or power sequencing. |
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-SSHD-T | Successor part with enhanced reliability, same pinout and command set; supports higher endurance (200K cycles) and extended temperature range (–40°C to +105°C) | Preferred for new designs requiring longer lifecycle or extended thermal margin; not drop-in for legacy qualification | Select AT25SF081B-SSHD-T for new designs where long-term supply continuity and extended temp operation are required. |
| W25Q80DVSSIQ | 8-Mbit SPI flash with Quad I/O, but lacks security register pages and hardware WP pin; different status register layout and QE bit handling | Requires firmware adaptation for security and protection features; suitable where cost optimization outweighs secure storage needs | Choose W25Q80DVSSIQ only if security register functionality and hardware write protection are not required. |
Compared with AT25SF081-XMHD-T, the AT25SF081B-SSHD-T offers higher endurance and extended temperature rating with identical footprint and command compatibility, while W25Q80DVSSIQ provides lower-cost Quad-I/O capability but omits security registers and hardware WP control - making it unsuitable for tamper-resistant or safety-critical deployments.
Availability
AT25SF081-XMHD-T is available at Aetrix Electronics and suitable for consumer IoT firmware storage, industrial HMI code shadowing, and medical wearable data logging requiring stable component supply across extended product lifecycles.
Supply support for AT25SF081-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, now part of Renesas Electronics, designs high-efficiency power management, audio, and memory solutions for mobile, IoT, and industrial applications.
The AT25SF081-XMHD-T belongs to Dialog's serial flash memory product line, engineered specifically for low-power, high-reliability code and data storage in resource-constrained embedded systems.
FAQ
What is the maximum operating frequency supported by AT25SF081-XMHD-T in Quad-I/O Read mode?
The AT25SF081-XMHD-T supports up to 104 MHz in Quad-I/O Read mode (EBh command), delivering up to 52 MB/s effective read throughput. This frequency is validated under industrial temperature conditions (–40°C to +85°C) and requires proper signal integrity design including controlled impedance traces and termination.
Does AT25SF081-XMHD-T support hardware write protection, and how is it implemented?
Yes, AT25SF081-XMHD-T implements hardware write protection via the WP pin, which directly controls locking of protected memory blocks without software intervention. When WP is pulled low, selected sectors become read-only until unlocked via status register commands - providing robust, glitch-immune protection during power transitions or MCU faults.
How many security register pages does AT25SF081-XMHD-T include, and what are their primary use cases?
AT25SF081-XMHD-T includes three dedicated security register pages, each individually lockable. These are used for unique device serialization, system-level Electronic Serial Number (ESN) storage, and secure key management - enabling hardware-rooted identity and cryptographic binding in certified medical or industrial devices.
What erase block sizes are available on AT25SF081-XMHD-T, and why does this matter for firmware design?
AT25SF081-XMHD-T supports uniform 4-Kbyte, 32-Kbyte, 64-Kbyte, and full-chip erase. This granularity prevents memory waste when updating discrete firmware modules or data segments - unlike large-block flash, it avoids erasing unused regions, preserving endurance and enabling modular OTA updates without full-image rewrites.
Is AT25SF081-XMHD-T pin-compatible with AT25SF081B-SSHD-T, and what are the key migration considerations?
AT25SF081-XMHD-T and AT25SF081B-SSHD-T share identical 8-SOIC (208-mil) packaging and pinout, but AT25SF081B-SSHD-T is not a drop-in replacement due to enhanced endurance (200K vs 100K cycles) and extended temperature rating (–40°C to +105°C). Migration requires validation of thermal performance and long-term reliability testing in target applications.
AT25SF081-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:
- 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-TSSOP
AT25SF081-XMHD-T FAQ
1.How can I place an order for AT25SF081-XMHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF081-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 AT25SF081-XMHD-T reliable?
The price and inventory of AT25SF081-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 AT25SF081-XMHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF081-XMHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF081-XMHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF081-XMHD-T?
AT25SF081-XMHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF081-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 AT25SF081-XMHD-T?
For technical support, including AT25SF081-XMHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF081-XMHD-T requirements.
6.How does Aetrix verify that AT25SF081-XMHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF081-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 AT25SF081-XMHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF081-XMHD-T?
All AT25SF081-XMHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF081-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 AT25SF081-XMHD-T part is unused and in its original packaging.
Return procedure for AT25SF081-XMHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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