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Renesas AT45DB081D-MU-SL954
- Part No.:
- AT45DB081D-MU-SL954
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB081D-MU-SL954.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
AT45DB081D-MU-SL954 from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, supporting up to 66 MHz clock frequency, 256- or 264-byte configurable page size, and dual 256/264-byte SRAM buffers for concurrent read/write operations. It operates from a single 2.5V–3.6V supply and targets embedded code shadowing, firmware storage, and data logging in industrial microcontroller systems.
For engineers reviewing the AT45DB081D-MU-SL954 datasheet, AT45DB081D-MU-SL954 pinout, AT45DB081D-MU-SL954 application, or AT45DB081D-MU-SL954 equivalent, key selection criteria include page-size configurability, continuous array read capability, sector lockdown security, 100,000 program/erase cycles, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT45DB081D-MU-SL954 implements a sequential-access Flash architecture with two independent SRAM buffers enabling simultaneous data reception and main memory reprogramming. Its RapidS interface supports SPI Modes 0 and 3, with command-driven operation using MSB-first 8-bit opcodes and flexible addressing schemes for both 256-byte and 264-byte page/buffer configurations.
Memory organization comprises 4,096 pages (256 or 264 bytes each), grouped into 16 sectors (including split Sector 0a/0b), with hierarchical erase granularity: page (256 B), block (2 KB), sector (64 KB), and chip (8 Mbit). All program and erase cycles are fully self-timed and require no external high-voltage programming signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 8,650,752 bits (8 Mbit), organized as 4,096 pages × 256 or 264 bytes |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (fCAR1), SPI Modes 0/3 compatible |
| Supply Voltage | 2.5V–3.6V or 2.7V–3.6V single supply - enables direct interfacing with 2.5V/3.3V MCUs without level shifters |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down - suitable for battery-backed systems |
| Erase/Program Endurance | ≥100,000 cycles per page - supports frequent firmware updates in field-deployed devices |
| Data Retention | 20 years at 85°C - ensures long-term reliability in industrial environments |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial applications |
Pinout & Package
AT45DB081D-MU-SL954 is packaged in an 8-pin MLF (VDFN) 3×3 mm body with exposed thermal pad (floating or GND-connected). Pin functions align with standard SPI plus dedicated RESET and WP pins for hardware-level protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates all commands on high-to-low transition; deassertion places SO in high-Z and enters standby mode |
| SCK | Serial Clock | Controls data timing: SI latched on rising edge; SO driven on falling edge - supports deterministic timing margins |
| SI | Serial Input | Accepts opcodes, addresses, and data; MSB-first protocol ensures compatibility with standard SPI controllers |
| SO | Serial Output | Provides read data, status, and ID responses; tri-stated when CS is high - prevents bus contention |
| WP | Write Protect | Hardware lock: low assertion blocks program/erase of protected sectors regardless of software state - critical for secure boot partitions |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns state machine to idle - enables safe recovery from communication errors |
| VCC | Power Supply | 2.5V–3.6V input; powers internal charge pumps for erase/program - eliminates need for external high-voltage generators |
| GND | Ground Reference | System ground return path; required for stable logic thresholds and noise immunity in mixed-signal operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256/264-byte buffers allow background data loading while main memory is being reprogrammed - enables seamless streaming in data loggers |
| Continuous Array Read | Single-command sequential read across full memory with automatic page-wrap and no inter-page delay - ideal for XIP (execute-in-place) code shadowing |
| Configurable Page Size | User-selectable 256- or 264-byte pages; factory-preconfigurable for 256-byte mode - balances density vs. EEPROM-emulation efficiency |
| Sector Lockdown Security | Individual sector lockdown with 128-byte security register (64-byte user space + 64-byte unique ID) - protects bootloader and calibration data from unauthorized overwrite |
| Flexible Erase Granularity | Page (256 B), block (2 KB), sector (64 KB), and chip (8 Mbit) erase options - minimizes wear and optimizes update time for partial firmware patches |
Applications
| Industrial Firmware Storage | Secure Bootloader Memory |
|---|---|
Use Scenario: Storing MCU application firmware images in programmable logic controllers (PLCs) with field-upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile storage for executable code; accessed via continuous read during boot or runtime shadowing. Use Value: 66 MHz RapidS interface enables fast code load times; 20-year retention ensures firmware integrity over equipment lifetime. | Use Scenario: Hosting immutable bootloader code and cryptographic keys in medical diagnostic devices requiring regulatory compliance. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for first-stage boot code and device identity credentials. Use Value: Sector lockdown and 128-byte security register prevent unauthorized modification; industrial temp rating supports sterilization cycles. |
| Data Logging Buffer | Embedded Voice/Image Storage |
Use Scenario: Capturing sensor telemetry in remote environmental monitoring nodes powered by energy harvesting. IC Role / Device Role / Timing Role: High-endurance write buffer with concurrent read/write via dual SRAM buffers. Use Value: 100,000 program/erase cycles and 15 µA deep power-down extend battery life and support frequent logging intervals. | Use Scenario: Storing voice prompts or UI graphics in handheld test equipment with limited PCB area. IC Role / Device Role / Timing Role: Compact, low-pin-count serial Flash replacing parallel NOR for multimedia assets. Use Value: 8-pin MLF package reduces footprint; continuous read eliminates address management overhead in resource-constrained MCUs. |
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 Flash, 104 MHz max clock, uniform 4 KB sectors, no SRAM buffers or page-size configuration | Lacks dual-buffer concurrency and flexible erase granularity; requires external buffering for streaming writes | Preferred where maximum read speed and JEDEC standardization outweigh concurrent operation needs |
| Microchip SST25VF080B-20-4I-SAE | 8 Mbit SPI Flash, 20 MHz max clock, 4 KB sectors, no security register or sector lockdown | No hardware write protection or unique device ID; lower endurance (10,000 cycles) | Suitable for cost-sensitive, non-security-critical legacy designs with modest performance requirements |
Compared with W25Q80DVSSIG and SST25VF080B-20-4I-SAE, the AT45DB081D-MU-SL954 uniquely delivers dual-buffer streaming, configurable page size, and integrated sector lockdown - making it optimal for secure, high-reliability embedded systems requiring concurrent access and long-term data integrity.
Availability
AT45DB081D-MU-SL954 is available at Aetrix Electronics and suitable for industrial firmware storage, secure bootloader memory, and data logging applications requiring stable component supply, long-life qualification, and RoHS-compliant packaging.
Supply support for AT45DB081D-MU-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, acquired 2020) specialized in low-power, high-reliability nonvolatile memory and IoT interface solutions.
The AT45DB081D-MU-SL954 belongs to the DataFlash® family, designed specifically for embedded systems needing efficient serial Flash with built-in buffering, security features, and robust industrial-grade endurance.
FAQ
What is the maximum clock frequency supported by the AT45DB081D-MU-SL954 for continuous read operations?
The AT45DB081D-MU-SL954 supports up to 66 MHz for Continuous Array Read in High Frequency Mode (opcode 0BH) and Legacy Mode (opcode E8H), as specified by fCAR1. This enables rapid code shadowing and streaming data access without CPU intervention. The device maintains full functionality across its entire industrial temperature range at this speed. Lower-frequency modes (e.g., opcode 03H) operate up to 33 MHz for reduced EMI or legacy controller compatibility.
Does the AT45DB081D-MU-SL954 support both 256-byte and 264-byte page sizes, and how is the selection made?
Yes, the AT45DB081D-MU-SL954 supports both 256-byte and 264-byte page sizes. The configuration is determined by factory setting or user command - the device can be pre-configured for 256-byte mode, or dynamically switched via instruction. Addressing differs: 256-byte mode uses A19–A0 addressing with 8-bit byte offset, while 264-byte mode uses PA11–PA0 + BA8–BA0 with 9-bit offset. This flexibility enables optimized EEPROM emulation or high-density storage depending on system requirements.
How does the dual-buffer architecture of the AT45DB081D-MU-SL954 improve system performance?
The AT45DB081D-MU-SL954's two independent 256/264-byte SRAM buffers allow simultaneous data reception on SI while reprogramming the Flash array, eliminating write latency bottlenecks. For example, while Buffer 1 is being written to main memory, Buffer 2 can accept new sensor data - essential for real-time data loggers. This concurrency avoids CPU stalling and enables continuous data streams without external RAM buffering, reducing BOM cost and PCB complexity.
What hardware and software security mechanisms does the AT45DB081D-MU-SL954 provide?
The AT45DB081D-MU-SL954 provides layered security: hardware Write Protect (WP) pin blocks sector writes independently of software state; Sector Lockdown permanently disables program/erase on selected sectors; and a 128-byte Security Register contains 64-byte user-programmable space plus a unique 64-byte device identifier. These features collectively protect bootloader code, calibration data, and cryptographic keys from accidental or malicious corruption in safety-critical systems.
Is the AT45DB081D-MU-SL954 suitable for automotive applications?
No, the AT45DB081D-MU-SL954 is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. While it meets many functional requirements for infotainment or body control modules, it lacks automotive-specific reliability validation, extended temperature coverage (e.g., −40°C to +125°C), and automotive-grade screening. For automotive use, designers should select AEC-Q100 qualified alternatives such as the Infineon HY4600 series or Cypress Semper Auto Flash.
AT45DB081D-MU-SL954 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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-VDFN (6x5)
AT45DB081D-MU-SL954 FAQ
1.How can I place an order for AT45DB081D-MU-SL954 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-MU-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-MU-SL954 reliable?
The price and inventory of AT45DB081D-MU-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-MU-SL954 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-MU-SL954?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-MU-SL954 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-MU-SL954?
AT45DB081D-MU-SL954 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-MU-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-MU-SL954?
For technical support, including AT45DB081D-MU-SL954 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-MU-SL954 requirements.
6.How does Aetrix verify that AT45DB081D-MU-SL954 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-MU-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-MU-SL954 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-MU-SL954?
All AT45DB081D-MU-SL954 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-MU-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-MU-SL954 part is unused and in its original packaging.
Return procedure for AT45DB081D-MU-SL954:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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