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Renesas AT25DF081A-MH-T
- Part No.:
- AT25DF081A-MH-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25DF081A-MH-T.pdf
- Description:
- IC FLASH 8MBIT SPI 100MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
AT25DF081A-MH-T from Adesto Technologies is an 8-Mbit SPI serial Flash memory IC designed for code shadowing and embedded data storage in consumer electronics. It operates from a single 2.7V–3.6V supply, supports SPI Modes 0/3 and RapidS™ up to 100MHz, delivers ≤5ns clock-to-output delay, and features uniform 4-Kbyte/32-Kbyte/64-Kbyte block erase for mixed code+data applications.
For engineers reviewing the AT25DF081A-MH-T datasheet, AT25DF081A-MH-T pinout, AT25DF081A-MH-T application, or AT25DF081A-MH-T equivalent, this device is selected for high-speed boot code execution, firmware update storage, and secure parameter retention where sector lockdown, OTP security register, and dual-input/dual-output transfer modes are required.
Technical Context
The AT25DF081A-MH-T implements a flexible erase architecture with four physical granularity levels (4/32/64-Kbyte blocks + full chip), enabling efficient partitioning of code modules and data segments without wasted space. Its dual-input program and dual-output read modes double effective throughput versus standard SPI by transferring two bits per SCK edge.
Hardware write protection via WP pin, individual sector protect/unprotect, global protect/unprotect, and permanent sector lockdown (via 33h command) provide layered security. The 128-byte OTP security register supports device serialization and key storage, while automatic erase/program failure detection ensures reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 bytes) - supports full firmware images or multi-application code storage |
| Supply Voltage | 2.7V–3.6V - compatible with standard 3.3V logic systems without level shifting |
| Max Clock Frequency | 100 MHz (RapidS™ mode) - enables ≤5ns tV for low-latency boot code fetch |
| Erase Granularity | Uniform 4-Kbyte / 32-Kbyte / 64-Kbyte blocks - minimizes wasted space during partial updates |
| Program Time | 1.0 ms typical for 256-byte page - reduces firmware update latency in field deployments |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - suitable for long-life industrial firmware |
| Power Consumption | 5 µA deep power-down current - enables ultra-low-power sleep states in battery devices |
Pinout & Package
AT25DF081A-MH-T is packaged in an 8-lead SOIC (208-mil wide), RoHS-compliant, green package. Pin functions are validated per Adesto datasheet 8715F–SFLSH–02/2022.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; rising edge terminates operations and places SO in high-Z |
| SCK | Serial Clock | Controls data timing; rising edge latches SI/SIO, falling edge clocks SO/SOI |
| SI (SIO) | Serial Input / Dual-Output | Standard input; becomes output (SIO) during Dual-Output Read for 2-bit-per-cycle reads |
| SO (SOI) | Serial Output / Dual-Input | Standard output; becomes input (SOI) during Dual-Input Program for 2-bit-per-cycle writes |
| WP | Write Protect | Hardware lock for protected sectors; low-active; internally pulled high |
| HOLD | Communication Pause | Halts SPI transfer without deselecting; requires CS asserted and SCK low to activate |
| VCC | Power Supply | 2.7V–3.6V core and I/O supply; no auxiliary voltage required |
| GND | Ground Reference | System ground return path for all internal circuitry and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Output Read Array (3Bh) | 2-bit-per-clock read transfers at up to 85MHz - doubles effective bandwidth over standard SPI |
| Dual-Input Byte/Page Program (A2h) | 2-bit-per-clock write transfers - accelerates firmware patching and configuration updates |
| Sector Lockdown (33h) | Permanent read-only locking of any combination of sixteen 64-Kbyte sectors - prevents tampering with boot code or keys |
| 128-Byte OTP Security Register | One-time programmable space for ESN, cryptographic keys, or calibration data - immune to field rewrites |
| Flexible Erase Architecture | Four erase granularities (4/32/64-Kbyte + chip) - eliminates need for external EEPROM in mixed code/data systems |
Applications
| Consumer Firmware Storage | Industrial Boot Code Execution |
|---|---|
Use Scenario: Storing and updating firmware in smart home hubs, set-top boxes, and portable media players. IC Role / Device Role / Timing Role: Non-volatile storage for executable code and runtime parameters; accessed via SPI during cold boot and OTA updates. Use Value: Uniform 4-Kbyte erase enables patch-level updates without erasing full application; 100,000-cycle endurance supports frequent field upgrades. |
Use Scenario: Bootloader and safety-critical firmware storage in PLCs, HMIs, and motor drives operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Primary boot memory mapped to microcontroller address space; rapid 100MHz RapidS™ read enables sub-100ms startup. Use Value: Sector lockdown secures bootloader region; industrial temp rating and 20-year retention ensure lifetime reliability without refresh. |
| Secure Parameter Retention | IoT Device Identity Management |
Use Scenario: Storing calibrated sensor offsets, network credentials, and device-specific configuration in medical wearables and environmental monitors. IC Role / Device Role / Timing Role: Secure, persistent data vault; accessed selectively during initialization using protected sector reads. Use Value: Individual sector protection isolates sensitive data from application code; WP pin hardware lock adds physical layer security. |
Use Scenario: Embedding unique identifiers and cryptographic keys in connected appliances, asset trackers, and smart meters. IC Role / Device Role / Timing Role: Root-of-trust anchor; OTP security register holds immutable ESN and AES keys used during TLS handshake. Use Value: 128-byte OTP prevents key extraction or cloning; sector lockdown prevents overwrite of identity-critical regions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q80DVSSIG | 8-Mbit, 3.3V, supports DTR mode; lacks RapidS™, dual-input program, and sector lockdown | No hardware-enforced permanent lockdown; relies on software protection only | Select when RapidS™ speed or OTP-based identity is not required; lower cost alternative |
| Macronix MX25L8006EM1I-12G | 8-Mbit, 3.3V, supports QPI; no dual-input/dual-output modes; no OTP register or sector lockdown | Requires external logic or MCU intervention for sector-level write lock enforcement | Choose for quad-SPI interface compatibility where higher pin count is acceptable and security depth is moderate |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT25DF081A-MH-T uniquely combines RapidS™ speed, dual-input/dual-output bandwidth doubling, hardware sector lockdown, and OTP security-making it optimal for secure, high-throughput embedded firmware where tamper resistance and update efficiency are critical.
Availability
AT25DF081A-MH-T is available at Aetrix Electronics and suitable for consumer electronics firmware storage, industrial boot code execution, and IoT device identity management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25DF081A-MH-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
Adesto Technologies (now part of Dialog Semiconductor, part of Renesas Electronics) specializes in low-power, non-volatile memory and analog ICs for IoT and edge devices.
The AT25DF081A-MH-T belongs to Adesto's DataFlash® family, engineered for high-speed, secure, and energy-efficient code and data storage in resource-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by AT25DF081A-MH-T in RapidS™ mode?
The AT25DF081A-MH-T supports up to 100 MHz in RapidS™ mode, enabling high-speed read operations with a maximum clock-to-output delay (tV) of 5 ns. This allows fast boot code execution and low-latency firmware access in time-critical applications. The device also supports standard SPI modes up to 85 MHz for backward compatibility.
Does AT25DF081A-MH-T support dual-input programming, and how is it enabled?
Yes, AT25DF081A-MH-T supports dual-input byte/page programming using opcode A2h. During this mode, the SO pin functions as SOI (Serial Output/Input), accepting one bit alongside SI on each rising SCK edge. This doubles write bandwidth versus standard SPI and is confirmed in the official datasheet section 8.2.
How does sector lockdown work on AT25DF081A-MH-T, and is it reversible?
Sector lockdown on AT25DF081A-MH-T is performed using the 33h command and permanently disables program/erase for selected 64-Kbyte sectors. Once locked, the state cannot be reversed - it is a one-time hardware-enforced protection. This feature is distinct from software-based sector protection and is verified in datasheet section "Sector Lockdown" (page 25).
What package type is used for AT25DF081A-MH-T, and what are its dimensions?
AT25DF081A-MH-T uses an 8-lead SOIC package with 208-mil body width (5.33 mm × 5.33 mm × 1.75 mm height). It is RoHS-compliant, halide-free, and Pb-free per JEDEC standards. This package is pin-compatible with industry-standard 8-SOIC footprints and validated in Figure 2-1 of the datasheet.
Can AT25DF081A-MH-T operate across the full industrial temperature range?
Yes, AT25DF081A-MH-T is specified for operation from –40°C to +85°C ambient temperature, meeting full industrial grade requirements. This is explicitly stated in the "Features" section and confirmed under "DC and AC Characteristics" in the datasheet revision 8715F–SFLSH–02/2022.
AT25DF081A-MH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 8Mbit
- Memory Organization:
- 256 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 100 MHz
- Write Cycle Time - Word, Page:
- 7µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25DF081A-MH-T FAQ
1.How can I place an order for AT25DF081A-MH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF081A-MH-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 AT25DF081A-MH-T reliable?
The price and inventory of AT25DF081A-MH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DF081A-MH-T is usually 5 days.
3.What payment methods are accepted for AT25DF081A-MH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF081A-MH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF081A-MH-T?
AT25DF081A-MH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF081A-MH-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 AT25DF081A-MH-T?
For technical support, including AT25DF081A-MH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF081A-MH-T requirements.
6.How does Aetrix verify that AT25DF081A-MH-T is sourced from the original manufacturer or authorized distributors?
All AT25DF081A-MH-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 AT25DF081A-MH-T meets industry standards.
7.What is the process for return or replacement of AT25DF081A-MH-T?
All AT25DF081A-MH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF081A-MH-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 AT25DF081A-MH-T part is unused and in its original packaging.
Return procedure for AT25DF081A-MH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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