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Renesas AT45DB081D-MU-2.5-SL383
- Part No.:
- AT45DB081D-MU-2.5-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB081D-MU-2.5-SL383.pdf
- Description:
- IC FLASH 8MBIT SPI 50MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,624
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Product details
Overview
AT45DB081D-MU-2.5-SL383 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 up to 66 MHz read throughput for code shadowing and firmware storage in resource-constrained embedded systems.
For engineers reviewing the AT45DB081D-MU-2.5-SL383 datasheet, AT45DB081D-MU-2.5-SL383 pinout, AT45DB081D-MU-2.5-SL383 application, or AT45DB081D-MU-2.5-SL383 equivalent, key selection criteria include its dual-buffered sequential access architecture, hardware/software sector protection, 100,000 program/erase cycles, 20-year data retention, and 2.5V–3.6V single-supply operation.
Technical Context
The AT45DB081D-MU-2.5-SL383 implements a serial flash architecture with two independent 256-/264-byte SRAM buffers enabling concurrent data reception and main memory reprogramming. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, with continuous array read bypassing buffers to enable seamless code execution.
Memory is organized as 4,096 pages (256 or 264 bytes each), grouped into 16 sectors (including split Sector 0a/0b), supporting page-, block- (8 pages), sector- (64 Kbytes), and chip-level erase. All program/erase operations are self-timed and require no external high-voltage supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 8,650,752 bits (8 Mbit) organized as 4,096 × 256/264-byte pages |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (Legacy E8H/High-Freq 0BH) |
| Supply Voltage | 2.5V–3.6V single supply; enables direct integration with 2.5V logic domains |
| Active Read Current | 7 mA typical - supports low-power boot-time code fetch in battery-backed systems |
| Standby Current | 25 µA typical - maintains system sleep efficiency without sacrificing wake-up readiness |
| Data Retention | 20 years - ensures long-term firmware integrity in unattended industrial deployments |
| Endurance | 100,000 program/erase cycles per page - validated for frequent field firmware updates |
Pinout & Package
AT45DB081D-MU-2.5-SL383 uses an 8-pin MLF (VDFN) package (3×3 mm, 0.5 mm pitch) with exposed thermal pad (floating or GND). Pin functions are electrically identical to SOIC-8 but with reduced footprint and improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition; holds device in standby when deasserted |
| SCK | Serial Clock | Controls data timing; SI latched on rising edge, SO clocked out on falling edge |
| SI | Serial Input | Accepts opcodes, addresses, and buffer data; MSB-first protocol |
| SO | Serial Output | Drives read data; tri-stated when CS is high |
| WP | Write Protect | Hardware lock for protected sectors; overrides software protection when asserted low |
| RESET | Reset Input | Low-active termination of ongoing operations; internal POR eliminates external reset circuitry |
| VCC | Power Supply | 2.5V–3.6V input; powers all logic and flash operations without voltage translation |
| GND | Ground Reference | Common return path; must be low-impedance for stable read/write margins |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256-/264-byte buffers enable simultaneous data streaming and flash reprogramming - critical for real-time firmware patching |
| Configurable Page Size | User-selectable 256- or 264-byte pages; factory-configurable for 256-byte mode - simplifies EEPROM emulation and aligns with legacy byte-addressable workflows |
| Continuous Array Read | Zero-gap page-boundary crossing and wrap-around reads - eliminates CPU intervention during boot code execution from flash |
| Sector Lockdown | Hardware-enforced write protection for individual sectors using dedicated lockdown register - prevents accidental overwrite of secure bootloader or calibration data |
| Security Register | 128-byte register with 64-byte user-programmable space + unique 64-byte device ID - enables secure device authentication and firmware binding |
Applications
| Industrial Firmware Storage | Medical Device Code Shadowing |
|---|---|
Use Scenario: Storing and updating firmware images in programmable logic controllers (PLCs) operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory with rapid sequential read capability and robust erase granularity for partial firmware updates. Use Value: Dual-buffered programming allows background firmware download while maintaining real-time control loop execution - no system downtime during updates. |
Use Scenario: Bootloading diagnostic firmware and calibration tables in portable ultrasound units requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure, tamper-resistant code and parameter storage with sector lockdown and unique device ID for traceability. Use Value: 20-year data retention and 100,000-cycle endurance ensure calibration persistence across device lifetime without recalibration service events. |
| Smart Meter Boot Memory | Automotive Telematics Log Buffer |
Use Scenario: Hosting boot code and secure boot keys in ANSI C12.19-compliant electricity meters deployed in utility substations. IC Role / Device Role / Timing Role: Trusted execution environment anchor with hardware write protection and JEDEC-standard ID verification. Use Value: WP pin + sector lockdown prevents unauthorized firmware modification during over-the-air updates - meets IEC 62443-3-3 SL2 requirements. |
Use Scenario: Capturing CAN bus event logs and GPS metadata during vehicle crash events for black-box recording. IC Role / Device Role / Timing Role: High-speed sequential write buffer with page-erase flexibility to manage cyclic log rotation under power interruption. Use Value: 66 MHz RapidS interface enables >8 MB/s sustained write throughput to flash - captures full 100 ms pre-crash CAN trace without loss. |
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 sector lockdown | Lacks dual-buffer concurrency and hardware sector lockdown; requires software-managed wear leveling | Choose for cost-sensitive designs where high-speed random access outweighs sequential streaming needs |
| Microchip SST26VF080A-104I/MF | 8 Mbit Quad SPI flash; 104 MHz; 4KB uniform sectors; no configurable page size; no security register | Supports QSPI x4 mode but lacks 128-byte security register and device ID; no page-size flexibility | Prefer when migrating to QSPI interfaces and needing faster random reads, not buffer-assisted streaming |
Compared with W25Q80DVSSIG and SST26VF080A-104I/MF, the AT45DB081D-MU-2.5-SL383 uniquely combines dual-SRAM buffering, 256/264-byte page configurability, and hardware-enforced sector lockdown - making it optimal for deterministic firmware update pipelines and secure boot architectures where concurrent access and tamper resistance are mandatory.
Availability
AT45DB081D-MU-2.5-SL383 is available at Aetrix Electronics and suitable for industrial firmware storage, medical device code shadowing, smart meter boot memory, and automotive telematics log buffering requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB081D-MU-2.5-SL383 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, Renesas Electronics) specialized in low-power, high-reliability nonvolatile memory and IoT connectivity solutions for industrial and medical markets.
The AT45DB081D-MU-2.5-SL383 belongs to the DataFlash® family, designed specifically for embedded systems requiring fast sequential access, concurrent buffer operation, and hardware-based security - targeting applications where traditional parallel NOR/NAND flash introduces layout complexity and power overhead.
FAQ
What is the maximum clock frequency supported by AT45DB081D-MU-2.5-SL383 for continuous array read operations?
The AT45DB081D-MU-2.5-SL383 supports up to 66 MHz for Continuous Array Read using Legacy (E8H) and High-Frequency (0BH) commands. This is defined by the fCAR1 specification in the datasheet. The Low-Frequency (03H) mode operates up to 33 MHz and omits the dummy byte requirement. All modes maintain zero-delay page boundary crossing and array wraparound behavior.
Does AT45DB081D-MU-2.5-SL383 support both 256-byte and 264-byte page sizes, and how is the selection made?
Yes, AT45DB081D-MU-2.5-SL383 supports both 256-byte and 264-byte page sizes. The configuration is user-selectable via status register bit SR[7], and can also be factory-preconfigured for 256-byte mode. Addressing differs: 264-byte mode uses PA11–PA0 + BA8–BA0, while 256-byte mode uses A19–A0 with standard binary alignment - enabling seamless EEPROM emulation.
How does the dual-buffer architecture of AT45DB081D-MU-2.5-SL383 improve system-level firmware update performance?
The AT45DB081D-MU-2.5-SL383's two independent 256-/264-byte SRAM buffers allow incoming firmware data to be loaded into one buffer while the other buffer's contents are simultaneously programmed into flash memory. This pipelining eliminates idle time during page programming (tEP), enabling uninterrupted data streaming - critical for OTA updates in real-time embedded systems.
What hardware-based security features are implemented in AT45DB081D-MU-2.5-SL383 to protect firmware and calibration data?
AT45DB081D-MU-2.5-SL383 provides three hardware security layers: (1) WP pin for physical sector write lockout, (2) Sector Lockdown register to permanently disable program/erase on selected sectors, and (3) 128-byte Security Register containing 64-byte user space + unique 64-byte device ID. These features operate independently of software control and persist through power cycles.
Is AT45DB081D-MU-2.5-SL383 compatible with standard SPI Mode 0 and Mode 3 interfaces, and what are the timing implications?
Yes, AT45DB081D-MU-2.5-SL383 is fully compatible with SPI Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1). SI data is latched on the rising edge of SCK; SO data is clocked out on the falling edge. This dual-mode support ensures interoperability with legacy and modern microcontrollers without requiring interface translation logic or custom drivers.
AT45DB081D-MU-2.5-SL383 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-SL383 FAQ
1.How can I place an order for AT45DB081D-MU-2.5-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-MU-2.5-SL383 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-SL383 reliable?
The price and inventory of AT45DB081D-MU-2.5-SL383 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-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-MU-2.5-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-MU-2.5-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-MU-2.5-SL383?
AT45DB081D-MU-2.5-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-MU-2.5-SL383 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-SL383?
For technical support, including AT45DB081D-MU-2.5-SL383 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-SL383 requirements.
6.How does Aetrix verify that AT45DB081D-MU-2.5-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-MU-2.5-SL383 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-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-MU-2.5-SL383?
All AT45DB081D-MU-2.5-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-MU-2.5-SL383, 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-SL383 part is unused and in its original packaging.
Return procedure for AT45DB081D-MU-2.5-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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