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Renesas AT45DB081D-MU-SL383
- Part No.:
- AT45DB081D-MU-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DB081D-MU-SL383.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,983
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Product details
Overview
AT45DB081D-MU-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 66 MHz max clock frequency, continuous array read for code shadowing, and hardware/software sector protection - ideal for embedded firmware storage in resource-constrained microcontroller systems.
For engineers reviewing the AT45DB081D-MU-SL383 datasheet, AT45DB081D-MU-SL383 pinout, AT45DB081D-MU-SL383 application, or AT45DB081D-MU-SL383 equivalent, key selection criteria include page-size flexibility (256 vs. 264 bytes), buffer-assisted streaming write capability, sector lockdown security, and low-power operation (25 µA standby) in a compact 8-pin VDFN package.
Technical Context
The AT45DB081D-MU-SL383 implements a sequential-access Flash architecture with two independent SRAM buffers enabling concurrent data reception and Flash reprogramming. Its RapidS interface supports SPI Modes 0 and 3 at up to 66 MHz, with three distinct read commands (E8H, 0BH, 03H) optimized for high-speed, legacy, and low-frequency operation respectively.
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). Page programming includes built-in erase (83H/86H) or erase-before-write (88H/89H) modes, both self-timed and status-register monitored.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,650,752 bits (8 Mbit), organized as 4,096 × 256/264-byte pages |
| Interface Speed | Up to 66 MHz SCK - enables >8 MB/s sustained read throughput for code shadowing |
| Supply Voltage | 2.5V or 2.7V–3.6V single supply - eliminates need for charge pumps or dual rails |
| Power Consumption | 7 mA active read current; 25 µA standby; 15 µA deep power-down - extends battery life in portable devices |
| Erase/Program Endurance | 100,000 cycles per page - supports frequent firmware updates in field-deployed systems |
| Data Retention | 20 years at 85°C - ensures long-term reliability in industrial environments |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
AT45DB081D-MU-SL383 is housed in an 8-pin 3×3 mm VDFN (MLF) package with exposed thermal pad (floating or GND-connected). Pinout matches standard SOIC-8 layout for layout compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; rising edge terminates self-timed operations; must remain low during command/address/data transfer |
| SCK | Serial Clock | Input clock; data latched on rising edge (SI), output shifted on falling edge (SO) |
| SI | Serial Input | Command, address, and data input; MSB-first; requires stable setup/hold relative to SCK |
| SO | Serial Output | Data output; tri-stated when CS high; supports daisy-chain or shared-bus configurations |
| WP | Write Protect | Hardware sector lock override; low = protects all enabled sectors regardless of software settings |
| RESET | Reset Input | Active-low hard reset; terminates ongoing operations and clears internal state machine |
| VCC | Power Supply | 2.5V or 2.7V–3.6V supply; decoupling capacitor required near pin for noise immunity |
| GND | Ground Reference | System ground return; connects to thermal pad if used for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256-/264-byte buffers enable seamless streaming writes: receive new data into one while programming the other to Flash |
| Configurable Page Size | User-selectable 256-byte (power-of-2) or 264-byte (DataFlash standard) pages - simplifies EEPROM emulation and aligns with legacy system requirements |
| Continuous Array Read | Single-command, wraparound sequential read across full memory (E8H/0BH/03H) - eliminates address overhead for boot code execution |
| Sector Lockdown Security | Hardware-enforced lockdown of individual sectors via dedicated command - prevents accidental or malicious overwrite of secure firmware or calibration data |
| 128-Byte Security Register | Includes 64-byte user-programmable space + 64-byte unique device ID - enables secure key storage and device authentication |
| Flexible Erase Granularity | Page (256 B), block (2 KB), sector (64 KB), or chip (8 Mbit) erase - minimizes wear and optimizes update time for partial firmware patches |
Applications
| Firmware Storage | Secure Boot Code |
|---|---|
Use Scenario: Storing MCU application firmware in space-constrained IoT edge nodes requiring over-the-air updates. IC Role / Device Role / Timing Role: Non-volatile program memory accessed via SPI during boot and runtime; supports rapid page rewrites without external high-voltage circuitry. Use Value: Dual-buffer streaming allows background download while preserving active code; 100K endurance enables >10 years of field updates at weekly intervals. |
Use Scenario: Holding immutable bootloader and cryptographic keys in medical or industrial controllers where tampering must be physically detectable. IC Role / Device Role / Timing Role: Secure, locked-down storage partition with hardware WP pin and sector lockdown - prevents runtime modification even under firmware compromise. Use Value: Unique 64-byte device ID enables binding keys to hardware identity; 20-year retention guarantees key validity across product lifecycle. |
| Audio/Log Buffering | Code Shadowing |
Use Scenario: Capturing sensor logs or voice snippets in battery-powered environmental monitors with intermittent connectivity. IC Role / Device Role / Timing Role: High-speed sequential write target using buffer-to-page programming; leverages low 15 µA deep power-down to minimize quiescent drain. Use Value: 66 MHz interface enables burst capture at >8 MB/s; flexible erase options allow efficient log rotation without full-chip erasure. |
Use Scenario: Executing performance-critical firmware from RAM by copying from Flash on startup in automotive body control modules. IC Role / Device Role / Timing Role: Continuous array read source for zero-wait-state code loading; bypasses buffers to stream directly from Flash array. Use Value: No address overhead or latency penalties at page boundaries; 66 MHz read speed reduces boot time by >40% vs. legacy 25 MHz SPI Flash. |
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 Quad SPI (QSPI), 104 MHz max, no SRAM buffers, fixed 256-byte pages | Lacks dual-buffer streaming and continuous array read; requires QSPI controller support | Choose for higher bandwidth in QSPI-enabled systems where buffer-assisted writes are unnecessary |
| Macronix MX25L8006EM1I-12G | 8 Mbit standard SPI, 80 MHz max, no configurable page size, no sector lockdown or security register | Supports only basic program/erase; lacks hardware write protection granularity and device ID | Choose for cost-sensitive designs requiring basic Flash functionality without security or streaming features |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-MU-SL383 uniquely combines dual-buffer streaming, page-size configurability, and hardware-enforced sector lockdown - making it optimal for secure, update-intensive embedded firmware storage where deterministic write latency and tamper resistance are critical.
Availability
AT45DB081D-MU-SL383 is available at Aetrix Electronics and suitable for firmware storage, secure boot code, audio buffering, and code shadowing applications requiring stable component supply, long-term industrial qualification, and RoHS-compliant packaging.
Supply support for AT45DB081D-MU-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 (acquired by Dialog Semiconductor, now part of Renesas) specialized in low-power, high-reliability non-volatile memory and analog solutions for industrial and IoT applications.
The AT45DB081D-MU-SL383 belongs to the DataFlash® family, designed specifically for embedded systems needing SPI-based Flash with integrated SRAM buffers, flexible erase, and hardware security - bridging the gap between traditional NOR Flash and EEPROM.
FAQ
What is the page size configuration mechanism for AT45DB081D-MU-SL383?
The AT45DB081D-MU-SL383 supports factory-preconfigured 256-byte pages or user-selectable 256/264-byte pages via configuration register. The 264-byte mode includes 8 bytes of overhead for ECC or metadata, while 256-byte mode aligns with standard binary addressing. Selection is persistent across power cycles and does not require reprogramming.
Does AT45DB081D-MU-SL383 support true byte-level writes like EEPROM?
No, AT45DB081D-MU-SL383 does not support true byte-level writes. However, it enables EEPROM emulation through a self-contained three-step read-modify-write operation using its dual SRAM buffers - allowing bit- or byte-alterability in software without external logic or high-voltage circuitry.
How does the WP pin interact with software-based sector protection on AT45DB081D-MU-SL383?
The WP pin on AT45DB081D-MU-SL383 provides hardware-level override: when asserted (low), it protects all sectors enabled in the Sector Protection Register regardless of software state. Commands like Enable Sector Protection and Sector Lockdown remain functional under WP assertion, but program/erase commands to protected sectors are ignored.
What is the maximum continuous read throughput achievable with AT45DB081D-MU-SL383?
At its maximum 66 MHz SCK frequency, AT45DB081D-MU-SL383 achieves up to 8.25 MB/s sustained read throughput using the High Frequency Continuous Array Read command (0BH), assuming zero wait states and uninterrupted clocking - ideal for fast code shadowing in microcontroller boot sequences.
Is AT45DB081D-MU-SL383 compatible with standard SPI controllers?
Yes, AT45DB081D-MU-SL383 is fully compatible with standard SPI controllers supporting Modes 0 and 3. It uses standard SI/SO/SCK/CS signals and requires no special timing or voltage translation. The RESET and WP pins are optional but recommended for robust system design.
AT45DB081D-MU-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:
- 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-SL383 FAQ
1.How can I place an order for AT45DB081D-MU-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-MU-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-SL383 reliable?
The price and inventory of AT45DB081D-MU-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-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-MU-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-MU-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-MU-SL383?
AT45DB081D-MU-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-MU-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-SL383?
For technical support, including AT45DB081D-MU-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-MU-SL383 requirements.
6.How does Aetrix verify that AT45DB081D-MU-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-MU-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-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-MU-SL383?
All AT45DB081D-MU-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-MU-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-SL383 part is unused and in its original packaging.
Return procedure for AT45DB081D-MU-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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