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Renesas AT45DB081D-SU-SL954
- Part No.:
- AT45DB081D-SU-SL954
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB081D-SU-SL954.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
AT45DB081D-SU-SL954 from Adesto Technologies is an 8-Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, 256/264-byte 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-SU-SL954 datasheet, AT45DB081D-SU-SL954 pinout, AT45DB081D-SU-SL954 application, or AT45DB081D-SU-SL954 equivalent, key selection considerations include page-size configurability (256 vs. 264 bytes), buffer-assisted concurrent read/write capability, sector-level hardware write protection, and JEDEC-compliant manufacturer/device ID read functionality.
Technical Context
The AT45DB081D-SU-SL954 implements a sequential-access Flash architecture using a 3-wire SPI-compatible RapidS interface (modes 0 and 3) with up to 66 MHz SCK, eliminating parallel address/data buses. Its memory array comprises 4,096 pages organized into 16 sectors (including split Sector 0a/0b), supporting page-, block-, sector-, and chip-level erase granularity.
Two independent SRAM buffers enable simultaneous data reception via SI while reprogramming main memory, enabling continuous streaming and EEPROM-emulation via self-contained read-modify-write. All operations-including program, erase, and status polling-are internally self-timed and require no external high-voltage programming supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,650,752 bits (8 Mbit), organized as 4,096 × 256- or 264-byte pages |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (0BH/E8H), enabling real-time code shadowing |
| Supply Voltage | 2.5V or 2.7V–3.6V single supply-no high-voltage programming required |
| Endurance | ≥100,000 program/erase cycles per page ensures long-term field reliability |
| Data Retention | 20 years at industrial temperature range (−40°C to +85°C) |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down |
| Security Features | 128-byte security register (64-byte user programmable + 64-byte unique device ID) |
Pinout & Package
AT45DB081D-SU-SL954 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard 150-mil body width and RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition; places SO in high-Z when deasserted |
| SCK | Serial Clock | Controls data timing: SI latched on rising edge; SO driven on falling edge |
| SI | Serial Input | Accepts opcodes, addresses, and data; MSB-first protocol |
| SO | Serial Output | Drives read data and status bits; tri-stated when CS is high |
| WP | Write Protect | Hardware lock: low assertion blocks program/erase of protected sectors regardless of software settings |
| RESET | Reset | Active-low hard reset; terminates ongoing operation and returns state machine to idle |
| VCC | Power Supply | 2.5V or 2.7V–3.6V primary supply; powers all internal logic and Flash array |
| GND | Ground | Reference return path for VCC and I/O signals; must be connected to system ground |
Key Features
| Feature | Design Value |
|---|---|
| User-configurable page size | Factory-set to 256-byte "power-of-2" mode or 264-byte DataFlash standard mode-enables seamless migration between legacy and optimized firmware layouts |
| Dual SRAM buffers | 256-/264-byte independent buffers allow overlapping data reception and Flash programming-eliminates write latency in streaming applications |
| Continuous Array Read | Single-command sequential read across full 8-Mbit array at up to 66 MHz with automatic page-wrap-ideal for XIP (execute-in-place) boot code execution |
| Sector lockdown & protection | Hardware WP pin + software-controlled Sector Protection Register enable tamper-resistant secure storage of bootloader or calibration data |
| JEDEC ID support | Standard Manufacturer ID (0x1F) and Device ID (0x26) readable via SPI-enables automated BOM verification and firmware compatibility checks |
Applications
| Firmware Storage | Code Shadowing |
|---|---|
Use Scenario: Storing microcontroller boot firmware and field-upgradable application binaries in space-constrained IoT edge nodes. IC Role / Device Role / Timing Role: Nonvolatile program memory accessed via SPI during cold start and OTA updates. Use Value: 20-year data retention and 100K endurance ensure reliable multi-year deployments without corruption or wear-out. | Use Scenario: Loading executable code from Flash into RAM for faster CPU execution in resource-limited embedded systems. IC Role / Device Role / Timing Role: High-speed serial code source with continuous read capability and zero-page-boundary delay. Use Value: 66 MHz RapidS interface enables sub-100 µs latency per 256-byte instruction fetch-critical for deterministic real-time response. |
| Secure Configuration Storage | Audio/Data Logging |
Use Scenario: Safeguarding cryptographic keys, calibration coefficients, and device-specific identifiers in medical or industrial controllers. IC Role / Device Role / Timing Role: Secure nonvolatile storage with hardware write protect and sector lockdown. Use Value: 128-byte security register (64-byte user space + 64-byte unique ID) prevents unauthorized overwrite or cloning. | Use Scenario: Capturing sensor telemetry or voice snippets in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power persistent buffer with flexible erase options (page/block/sector). Use Value: 15 µA deep power-down current and granular 2-Kbyte block erase minimize energy per logged record. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB081E-SU | Successor with enhanced reliability, same pinout and command set; supports identical 256/264-byte page modes | Drop-in replacement for new designs requiring extended lifecycle support and updated qualification | Select AT45DB081E-SU for new projects; AT45DB081D-SU-SL954 remains valid for legacy BOM continuity |
| W25Q80DVSSIG | 8-Mbit SPI NOR Flash (Winbond); 104 MHz max clock; no SRAM buffers; standard 256-byte pages only | Lacks concurrent buffer operation and continuous array read-requires host-side buffering for streaming | Choose W25Q80DVSSIG only if higher clock speed outweighs loss of buffer-assisted throughput and simplified firmware design |
Compared with AT45DB081E-SU, the AT45DB081D-SU-SL954 offers identical functionality but lacks the successor's extended qualification and production support; versus W25Q80DVSSIG, it trades raw speed for integrated buffering, lower power, and seamless code shadowing-making it superior for latency-sensitive, low-energy embedded firmware storage.
Availability
AT45DB081D-SU-SL954 is available at Aetrix Electronics and suitable for firmware storage, code shadowing, secure configuration storage, and audio/data logging applications requiring stable component supply and long-term industrial-grade reliability.
Supply support for AT45DB081D-SU-SL954 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, a Renesas company) specialized in low-power, high-reliability serial Flash and nonvolatile memory solutions for industrial and IoT applications.
The AT45DB081D-SU-SL954 belongs to the DataFlash® family, designed specifically to replace parallel EEPROM and NOR Flash in embedded systems where pin count, power, and sequential access efficiency are critical.
FAQ
What is the maximum clock frequency supported by the AT45DB081D-SU-SL954 for continuous read operations?
The AT45DB081D-SU-SL954 supports up to 66 MHz for Continuous Array Read using opcodes 0BH (High Frequency Mode) and E8H (Legacy Command), as specified by the fCAR1 parameter. This applies to both 256-byte and 264-byte page configurations and enables real-time code shadowing without page-boundary delays. The AT45DB081D-SU-SL954 maintains full functionality at this rate under industrial temperature conditions with proper signal integrity layout.
Does the AT45DB081D-SU-SL954 require external high-voltage programming circuitry?
No, the AT45DB081D-SU-SL954 operates entirely from a single 2.5V or 2.7V–3.6V supply for all operations-including program, erase, and read-eliminating the need for charge pumps or external VPP generators. All programming and erase cycles are internally self-timed, and the AT45DB081D-SU-SL954 automatically manages voltage regulation and timing control without host intervention.
How does the dual-buffer architecture of the AT45DB081D-SU-SL954 improve system throughput?
The AT45DB081D-SU-SL954 integrates two independent 256-/264-byte SRAM buffers that allow simultaneous data reception via SI while reprogramming main memory. This overlap eliminates write latency in streaming applications such as firmware updates or sensor logging. Because the AT45DB081D-SU-SL954 handles buffering internally, the host processor avoids complex scheduling and gains deterministic response time-especially valuable in real-time embedded systems.
Can the AT45DB081D-SU-SL954 be used for secure storage of cryptographic keys?
Yes, the AT45DB081D-SU-SL954 includes a dedicated 128-byte security register with 64 bytes of user-programmable space and a factory-programmed 64-byte unique device identifier. Combined with hardware write protection (WP pin) and sector lockdown capability, it provides tamper-resistant storage for keys, calibration data, or device credentials. The AT45DB081D-SU-SL954 ensures these regions remain inaccessible to unauthorized program/erase commands-even when WP is asserted.
Is the AT45DB081D-SU-SL954 pin-compatible with newer Adesto DataFlash devices like the AT45DB081E?
Yes, the AT45DB081D-SU-SL954 is pin-compatible and command-set compatible with the AT45DB081E-SU, its direct successor. Both share identical SOIC-8 packaging, pin assignments, electrical characteristics, and instruction opcodes-including support for 256-byte and 264-byte page modes. The AT45DB081D-SU-SL954 can be replaced with AT45DB081E-SU in existing designs without PCB or firmware changes, though the latter offers extended lifecycle and enhanced reliability screening.
AT45DB081D-SU-SL954 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 66 MHz
- Write Cycle Time - Word, Page:
- 4ms
- 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-SOIC
AT45DB081D-SU-SL954 FAQ
1.How can I place an order for AT45DB081D-SU-SL954 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SU-SL954 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-SU-SL954 reliable?
The price and inventory of AT45DB081D-SU-SL954 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB081D-SU-SL954 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SU-SL954?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SU-SL954 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SU-SL954?
AT45DB081D-SU-SL954 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SU-SL954 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-SU-SL954?
For technical support, including AT45DB081D-SU-SL954 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SU-SL954 requirements.
6.How does Aetrix verify that AT45DB081D-SU-SL954 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SU-SL954 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-SU-SL954 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SU-SL954?
All AT45DB081D-SU-SL954 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SU-SL954, 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-SU-SL954 part is unused and in its original packaging.
Return procedure for AT45DB081D-SU-SL954:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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