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Renesas AT45DB081D-MU-2.5
- Part No.:
- AT45DB081D-MU-2.5
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB081D-MU-2.5.pdf
- Description:
- IC FLASH 8MBIT SPI 50MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
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Product details
Overview
AT45DB081D-MU-2.5 from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, 256/264-byte configurable page size, dual 256-/264-byte SRAM buffers, and industrial temperature support. It delivers 66 MHz max clock frequency, 100,000 program/erase cycles per page, and 20-year data retention for embedded code shadowing and firmware storage.
For engineers reviewing the AT45DB081D-MU-2.5 datasheet, AT45DB081D-MU-2.5 pinout, AT45DB081D-MU-2.5 application, or AT45DB081D-MU-2.5 equivalent, key selection factors include its dual-buffered sequential read capability, hardware/software sector protection, 2.5V single-supply operation, and flexible erase granularity (page/block/sector/chip) - critical for resource-constrained microcontroller-based systems requiring reliable in-system reprogramming.
Technical Context
The AT45DB081D-MU-2.5 implements a RapidS™ serial interface fully compatible with SPI Modes 0 and 3, supporting up to 66 MHz clock frequency for high-speed continuous array reads. Its memory architecture comprises 4,096 pages of 256- or 264-byte capacity, organized into 16 sectors with asymmetric sector 0 (8 + 248 pages) and uniform 256-page sectors 1–15.
It integrates two independent SRAM buffers (256/264 bytes each) enabling simultaneous data reception and flash reprogramming, and supports EEPROM emulation via self-contained read-modify-write operations. All program and erase cycles are internally self-timed, eliminating external timing control requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,650,752 bits (8 Mbit), organized as 4,096 × 256/264-byte pages |
| Supply Voltage | 2.5 V or 2.7–3.6 V single supply - enables direct interfacing with 2.5V logic and mixed-voltage MCU systems |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read - supports real-time code execution from flash without local RAM buffering |
| Erase Granularity | Page (256 B), Block (2 KB), Sector (64 KB), Chip (8 Mbit) - allows precise firmware update partitioning and wear leveling |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable industrial firmware |
| Power Consumption | 7 mA active read current; 25 µA standby; 15 µA deep power-down - extends battery life in portable and IoT edge devices |
| Security Features | 128-byte security register (64-byte user-programmable + 64-byte unique ID); sector lockdown and hardware write protect (WP) |
Pinout & Package
AT45DB081D-MU-2.5 uses an 8-pin MLF (VDFN) package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad (floating or GND). Pin functions are electrically defined and validated per Adesto datasheet 3596P–DFLASH–2/2014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition; deassertion places device in standby (SO tri-stated) |
| SCK | Serial Clock | Input clock controlling data flow; SI latched on rising edge, SO output on falling edge - ensures deterministic SPI timing alignment |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol supports opcode + address + payload in single CS assertion |
| SO | Serial Output | Data output during read operations; high-impedance when CS is high - enables multi-device SPI bus sharing |
| WP | Write Protect | Hardware-level sector protection override; low-active signal blocks program/erase regardless of software protection state |
| RESET | Reset | Active-low hard reset; terminates ongoing operations and returns internal state machine to idle - critical for recovery after bus errors |
| VCC | Power Supply | 2.5 V or 2.7–3.6 V supply; powers core logic, flash array, and I/O buffers - no high-voltage programming required |
| GND | Ground Reference | System ground return; must be low-impedance connection to minimize noise coupling into sensitive flash read paths |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256-/264-byte buffers enable concurrent data streaming and flash reprogramming - eliminates CPU wait states during firmware updates |
| Continuous Array Read | Seamless wrap-around read across page and array boundaries at up to 66 MHz - ideal for executing boot code directly from flash |
| User-Configurable Page Size | Factory-set 256-byte (power-of-2) or 264-byte (DataFlash standard) page format - optimizes compatibility with legacy EEPROM emulation or high-density storage |
| Hardware Write Protection | WP pin provides unconditional sector-level lockout independent of software registers - prevents accidental corruption during power transients |
| Security Register | 128-byte dedicated register with 64-byte user space and 64-byte factory-unique ID - enables secure device authentication and firmware binding |
| JEDEC ID Support | Standard manufacturer and device ID readout - simplifies automated board-level verification and BOM validation in production test |
Applications
| Industrial HMI Firmware Storage | Medical Device Configuration Data |
|---|---|
Use Scenario: Storing GUI assets, calibration tables, and localized language strings in panel-mounted HMIs with limited PCB area. IC Role / Device Role / Timing Role: Nonvolatile firmware and configuration storage with rapid sequential read for UI rendering and fast boot. Use Value: Dual-buffered continuous read at 66 MHz enables zero-latency display initialization; 2.5V operation matches low-power ARM Cortex-M7 SoC I/O rails. |
Use Scenario: Retaining patient-specific therapy parameters and device audit logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, long-life data logger and parameter store with sector lockdown for regulatory compliance (IEC 62304). Use Value: 20-year data retention and 100K-cycle endurance ensure lifetime validity of clinical settings; 128-byte security register binds firmware to hardware identity. |
| IoT Edge Node OTA Updates | Automotive Body Control Module Code |
Use Scenario: Hosting dual firmware images (active + candidate) and delta patch metadata in LPWAN-connected sensors. IC Role / Device Role / Timing Role: Reliable over-the-air update staging area with atomic page-level writes and rollback-safe sector erasure. Use Value: Flexible erase options (page/block/sector) minimize update time and power consumption; deep power-down mode (<15 µA) extends battery life between updates. |
Use Scenario: Storing bootloader, CAN firmware, and vehicle-specific configuration in body control units operating across -40°C to +105°C. IC Role / Device Role / Timing Role: Automotive-grade code shadowing memory with hardware write protection against ECU reset glitches. Use Value: Industrial temperature range (-40°C to +85°C) and WP pin hardening prevent corruption during cold cranking or load dump events. |
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 SPI NOR flash; 104 MHz max clock; no SRAM buffers; fixed 256-byte pages; no security register | Lacks dual-buffer streaming and hardware sector lockdown; requires external ECC for high-reliability logging | Choose for cost-sensitive, high-speed read-only code storage where buffer-assisted writes are unnecessary |
| Macronix MX25L8006EM1I-12G | 8 Mbit SPI NOR flash; 86 MHz max clock; no SRAM buffers; 4-KB sector erase only; no security features | No page/block erase flexibility; no continuous array read optimization; no unique device ID or programmable security space | Choose for legacy designs requiring JEDEC-compliant SPI flash without DataFlash-specific streaming or security capabilities |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-MU-2.5 uniquely delivers concurrent buffer-and-flash operation, seamless continuous read across boundaries, and integrated security primitives - making it optimal for systems requiring robust, low-power, in-field firmware agility.
Availability
AT45DB081D-MU-2.5 is available at Aetrix Electronics and suitable for industrial HMI firmware storage, medical device configuration data, IoT edge node OTA updates, automotive body control module code, and secure bootloader applications requiring stable component supply and long-term lifecycle assurance.
Supply support for AT45DB081D-MU-2.5 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) specialized in low-power, high-reliability nonvolatile memory solutions for embedded systems.
The AT45DB081D-MU-2.5 belongs to the DataFlash® family, designed specifically for microcontroller-based applications needing efficient code shadowing, firmware update resilience, and secure parameter storage without external RAM buffering.
FAQ
What voltage range does the AT45DB081D-MU-2.5 support, and is it compatible with 3.3V I/O systems?
The AT45DB081D-MU-2.5 operates from a single supply of either 2.5 V ±0.2 V or 2.7–3.6 V, making it compatible with both 2.5V and 3.3V logic families. Its I/O pins are 3.6V-tolerant, allowing direct connection to 3.3V microcontrollers without level shifters. The AT45DB081D-MU-2.5 maintains full functionality-including 66 MHz RapidS™ operation-across this entire voltage range, ensuring design flexibility in mixed-voltage systems.
How does the dual-buffer architecture of the AT45DB081D-MU-2.5 improve firmware update performance?
The AT45DB081D-MU-2.5's two independent 256-/264-byte SRAM buffers allow simultaneous data reception via SI while reprogramming the main flash array, eliminating CPU polling delays. During an OTA update, one buffer receives new data while the other writes to flash-enabling continuous data streaming. This architecture reduces total update time by up to 40% compared to single-buffer flash devices and is intrinsic to the AT45DB081D-MU-2.5's EEPROM emulation capability.
Can the AT45DB081D-MU-2.5 perform true byte-level writes like EEPROM, and how is this achieved?
Yes-the AT45DB081D-MU-2.5 supports EEPROM emulation through a self-contained three-step read-modify-write operation executed entirely within the device. Using its dual buffers, the AT45DB081D-MU-2.5 reads a full page into a buffer, modifies specific bytes, then writes the updated page back to flash with built-in erase. No host-side logic or external RAM is needed, and the AT45DB081D-MU-2.5 handles all timing and error checking internally.
What security mechanisms does the AT45DB081D-MU-2.5 provide for protecting firmware and configuration data?
The AT45DB081D-MU-2.5 provides layered security: hardware write protection via the WP pin, software-controlled sector protection registers, sector lockdown (irreversible lock), and a 128-byte security register containing 64 bytes of user-programmable space plus a factory-programmed 64-byte unique device identifier. These features enable cryptographic binding, secure boot validation, and tamper-resistant storage-all implemented without external components. The AT45DB081D-MU-2.5's security model is validated per industrial standards for firmware integrity.
Is the AT45DB081D-MU-2.5 suitable for automotive applications, and what temperature range does it support?
The AT45DB081D-MU-2.5 is rated for industrial temperature range (–40°C to +85°C) and meets RoHS, halogen-free, and lead-free requirements. While not AEC-Q100 qualified, its robust construction, hardware write protection, and deep power-down mode (<15 µA) make it widely deployed in automotive body control modules, infotainment subsystems, and telematics gateways where extended temperature operation and glitch immunity are required. The AT45DB081D-MU-2.5 has demonstrated reliability in these environments per customer qualification reports.
AT45DB081D-MU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 8Mbit
- Memory Organization:
- 264 Bytes x 4096 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 50 MHz
- Write Cycle Time - Word, Page:
- 4ms
- 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-VDFN (6x5)
AT45DB081D-MU-2.5 FAQ
1.How can I place an order for AT45DB081D-MU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-MU-2.5 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 AT45DB081D-MU-2.5 reliable?
The price and inventory of AT45DB081D-MU-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB081D-MU-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-MU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-MU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-MU-2.5?
AT45DB081D-MU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-MU-2.5 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 AT45DB081D-MU-2.5?
For technical support, including AT45DB081D-MU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-MU-2.5 requirements.
6.How does Aetrix verify that AT45DB081D-MU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-MU-2.5 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 AT45DB081D-MU-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-MU-2.5?
All AT45DB081D-MU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-MU-2.5, 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 AT45DB081D-MU-2.5 part is unused and in its original packaging.
Return procedure for AT45DB081D-MU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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