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Renesas AT25SF081-MAHF-T
- Part No.:
- AT25SF081-MAHF-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25SF081-MAHF-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
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Product details
Overview
AT25SF081-MAHF-T from Dialog Semiconductor is an 8-Mbit SPI serial flash memory IC with dual- and quad-I/O support, operating from 2.3V to 3.6V, delivering up to 104 MHz read frequency and 6 ns clock-to-output delay. It features uniform 4/32/64-Kbyte block erase, hardware write protection via WP pin, and three programmable security register pages for device serialization or ESN storage - deployed in embedded boot code storage and firmware update subsystems.
For engineers reviewing the AT25SF081-MAHF-T datasheet, AT25SF081-MAHF-T pinout, AT25SF081-MAHF-T application, or AT25SF081-MAHF-T equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, SPI Mode 0/3 compatibility, deep power-down (2 µA), and real-world use context for code shadowing and secure data logging in industrial microcontroller systems.
Technical Context
The AT25SF081-MAHF-T implements a flexible erase architecture with four granular erase levels (256-byte page, 4-Kbyte, 32-Kbyte, 64-Kbyte, and full chip), enabling efficient co-location of code modules and data segments without memory waste. Its command set includes Dual-Output Read (3Bh), Dual-I/O Read (BBh), Quad-Output Read (6Bh), and Quad-I/O Read (EBh), all requiring QE bit enablement in Status Register Byte 2 for quad modes.
It supports standard SPI bus signaling with CS, SCK, SI (I/O0), SO (I/O1), WP (I/O2), and HOLD (I/O3) pins - all configurable as bidirectional I/O in multi-I/O modes. Internal address counter enables continuous read wraparound from 0xFFFFFh to 0x000000h without delay, and the security register pages are individually lockable for tamper-resistant key or ID storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 bytes), sufficient for bootloader + application firmware in resource-constrained MCUs |
| Supply Voltage | 2.3V–3.6V single supply - compatible with 2.5V and 3.3V logic domains without level shifting |
| Max Read Frequency | 104 MHz (Quad-I/O mode) - enables 52 MB/s effective throughput for fast code execution |
| Clock-to-Output Delay | 6 ns - minimizes wait states during high-speed MCU instruction fetch from flash |
| Erase Performance | 70 ms (4-Kbyte block), 300 ms (32-Kbyte), 600 ms (64-Kbyte) - balances speed vs. endurance for field updates |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - validated for long-life industrial deployments |
| Power Consumption | 2 µA deep power-down current - critical for battery-backed or energy-harvesting edge nodes |
Pinout & Package
AT25SF081-MAHF-T is packaged in an 8-lead SOIC (150-mil width), surface-mount, RoHS-compliant package with standard JEDEC footprint. Pin functions are fully SPI-compatible and support reconfiguration for dual/quad I/O operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; rising edge terminates operations and places SO/SI in high-Z state |
| SCK | Serial clock input | Controls data latching (rising edge) and output timing (falling edge); supports up to 104 MHz |
| SI (I/O0) | Serial input / Quad I/O0 | Command/address/data input in standard mode; becomes data output in Dual/Quad Read |
| SO (I/O1) | Serial output / Quad I/O1 | Data output in standard/Dual mode; carries MSB in all multi-I/O reads |
| WP (I/O2) | Write protect input / Quad I/O2 | Hardware lock for protected blocks; repurposed as data output in Quad Read |
| HOLD (I/O3) | Communication pause input / Quad I/O3 | Halts SPI transfer without deselecting device; becomes data output in Quad Read |
| VCC | Power supply | 2.3V–3.6V primary supply; powers internal logic, charge pump, and I/O buffers |
| GND | Ground reference | System return path; must be low-impedance to ensure signal integrity and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O Read Support | Enables 2× or 4× read bandwidth over standard SPI - reduces instruction overhead and improves MCU fetch efficiency |
| Uniform Block Erase Architecture | 4/32/64-Kbyte erase granularity eliminates wasted space when isolating code/data regions - increases usable density |
| Three Security Register Pages | Individually lockable 256-byte pages for ESN, cryptographic keys, or calibration data - prevents unauthorized overwrite |
| Hardware Write Protection | WP pin enables physical lock of protected memory blocks - immune to software corruption or glitch attacks |
| Deep Power-Down Mode | 2 µA typical current draw - extends battery life in always-on IoT sensors and portable diagnostics equipment |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical firmware in DIN-rail mounted PLCs with extended temperature operation. IC Role / Device Role / Timing Role: Non-volatile code storage with fast read access and deterministic erase timing for safe field updates. Use Value: Uniform 4-Kbyte erase enables atomic firmware patching without disrupting adjacent control logic sections. |
Use Scenario: Holding FDA-compliant boot image and configuration data in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power flash memory supporting encrypted boot verification and tamper-evident logging. Use Value: Three lockable security register pages store device-specific keys and calibration constants resistant to replay or overwrite. |
| Automotive Infotainment Head Unit | Smart Energy Meter Firmware |
Use Scenario: Hosting UI assets and OS kernel in automotive-grade infotainment units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability SPI flash with 104 MHz Quad-I/O read for rapid GUI asset loading and OTA update staging. Use Value: 100,000-cycle endurance and 20-year retention meet AEC-Q100 reliability requirements for 15-year vehicle lifecycles. |
Use Scenario: Storing metrology firmware and tariff tables in ANSI C12.22-compliant smart meters with battery backup. IC Role / Device Role / Timing Role: Low-quiescent-power flash memory enabling >10-year battery life in AMI endpoint devices. Use Value: 2 µA deep power-down current minimizes self-discharge during mains outage while preserving firmware integrity. |
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-MAHF-T | Direct revision upgrade with enhanced ESD robustness and updated qualification per Adesto/Dialog post-acquisition standards | Identical pinout, timing, and command set; recommended for new designs per datasheet notice | Select for production builds requiring latest qualification and long-term supply assurance |
| Winbond W25Q80DVSSIG | 8-Mbit SPI flash with Quad-I/O, but lacks dedicated security register pages and uses different status register layout | Supports similar boot/code storage roles but requires firmware adaptation for security and protection features | Choose where cost sensitivity outweighs need for on-chip ESN/key storage or hardware block locking |
Compared with AT25SF081-MAHF-T, the AT25SF081B-MAHF-T offers identical functionality with improved process reliability, while the W25Q80DVSSIG provides competitive density and speed but omits integrated security registers and requires custom protection logic implementation.
Availability
AT25SF081-MAHF-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive infotainment head units, and smart energy meter firmware requiring stable component supply and long-term lifecycle support.
Supply support for AT25SF081-MAHF-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, integrating its low-power non-volatile memory portfolio including serial flash and conductive-bridging RAM.
The AT25SF081-MAHF-T belongs to Dialog's Adesto-branded serial flash product line, engineered for ultra-low-power, high-reliability code and data storage in battery-operated and industrial-edge applications.
FAQ
What is the operating voltage range for the AT25SF081-MAHF-T?
The AT25SF081-MAHF-T operates from 2.3V to 3.6V, making it compatible with both 2.5V and 3.3V system rails without external level shifters. This single-supply range simplifies power design in mixed-voltage embedded systems and ensures reliable operation across industrial temperature extremes (-40°C to +85°C).
Does the AT25SF081-MAHF-T support Quad-I/O read commands?
Yes, the AT25SF081-MAHF-T supports Quad-I/O Read (EBh opcode) at up to 104 MHz, provided the Quad Enable (QE) bit in Status Register Byte 2 is set. In this mode, SI, SO, WP, and HOLD function as I/O3–I/O0 to deliver 4 bits per clock cycle, achieving up to 52 MB/s effective throughput.
How many security register pages does the AT25SF081-MAHF-T include?
The AT25SF081-MAHF-T includes three dedicated 256-byte security register pages that can be individually locked using hardware or software controls. These pages are used for storing electronic serial numbers, cryptographic keys, or calibration data - and remain protected even during full-chip erase operations.
What is the typical deep power-down current for the AT25SF081-MAHF-T?
The AT25SF081-MAHF-T draws 2 µA typical current in deep power-down mode, activated via the B9h command. This ultra-low quiescent current extends battery life in always-on edge devices such as wireless sensors and portable diagnostic tools where standby duration exceeds active runtime.
Is the AT25SF081-MAHF-T pin-compatible with the AT25SF081B-MAHF-T?
Yes, the AT25SF081-MAHF-T is pin-compatible and functionally identical to the AT25SF081B-MAHF-T, which is the recommended replacement for new designs. The 'B' revision includes enhanced ESD performance and updated manufacturing qualifications but retains the same SOIC-8 footprint, timing, and command set as the original AT25SF081-MAHF-T.
AT25SF081-MAHF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFDFN 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:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25SF081-MAHF-T FAQ
1.How can I place an order for AT25SF081-MAHF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF081-MAHF-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-MAHF-T reliable?
The price and inventory of AT25SF081-MAHF-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-MAHF-T is usually 5 days.
3.What payment methods are accepted for AT25SF081-MAHF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF081-MAHF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF081-MAHF-T?
AT25SF081-MAHF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF081-MAHF-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-MAHF-T?
For technical support, including AT25SF081-MAHF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF081-MAHF-T requirements.
6.How does Aetrix verify that AT25SF081-MAHF-T is sourced from the original manufacturer or authorized distributors?
All AT25SF081-MAHF-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-MAHF-T meets industry standards.
7.What is the process for return or replacement of AT25SF081-MAHF-T?
All AT25SF081-MAHF-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF081-MAHF-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-MAHF-T part is unused and in its original packaging.
Return procedure for AT25SF081-MAHF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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