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Renesas AT45DB081D-SU-SL383-AD
- Part No.:
- AT45DB081D-SU-SL383-AD
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB081D-SU-SL383-AD.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
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Product details
Overview
AT45DB081D-SU-SL383-AD from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, supporting up to 66 MHz clock frequency, 4,096 pages (256/264-byte configurable), dual 256-/264-byte SRAM buffers, and industrial temperature operation. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring code shadowing and in-system reprogrammability.
For engineers reviewing the AT45DB081D-SU-SL383-AD datasheet, AT45DB081D-SU-SL383-AD pinout, AT45DB081D-SU-SL383-AD application, or AT45DB081D-SU-SL383-AD equivalent, key selection considerations include page-size configurability (256 vs. 264 bytes), continuous array read capability for boot code execution, hardware write protection via WP pin, sector lockdown security, and 100,000 program/erase cycles per page.
Technical Context
The AT45DB081D-SU-SL383-AD implements a sequential-access Flash architecture using a 3-wire SPI interface (CS, SCK, SI/SO) with Mode 0 and Mode 3 compatibility. Its memory is organized into 16 sectors (including split Sector 0a/0b), 512 blocks (8 pages each), and 4,096 individually erasable pages - enabling fine-grained erase control without parallel address bus overhead.
Two independent 256-/264-byte SRAM buffers support concurrent data reception and Flash programming, enabling seamless streaming writes and EEPROM-emulation via internal read-modify-write. All erase and program operations are fully self-timed, eliminating external timing management.
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 for Continuous Array Read (RapidS™), SPI Modes 0/3 compatible |
| Supply Voltage | 2.5V or 2.7V to 3.6V single supply - enables direct interfacing with 2.5V/3.3V logic without level shifters |
| Page Size | User-configurable: 256-byte (power-of-2) or 264-byte (DataFlash standard); factory pre-configurable |
| Erase Granularity | Page (256 B), Block (2 KB), Sector (64 KB), or Chip (8 Mbit) - supports flexible firmware update strategies |
| Data Retention | 20 years at 85°C - validated for long-life industrial deployments |
| Endurance | 100,000 program/erase cycles per page - sufficient for frequent field firmware updates |
| Power Consumption | 7 mA active read current typical; 25 µA standby; 15 µA deep power-down - suitable for battery-backed systems |
Pinout & Package
AT45DB081D-SU-SL383-AD is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) surface-mount package with 150 mil body width, RoHS-compliant and halide-free.
| 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 with SO in high-Z |
| SCK | Serial Clock | Controls data transfer timing; SI latched on rising edge, SO driven on falling edge |
| SI | Serial Input | Accepts opcodes, addresses, and data; MSB-first protocol; requires stable setup/hold relative to SCK |
| SO | Serial Output | Drives read data and status bits; tri-stated when CS is high; synchronized to SCK falling edge |
| WP | Write Protect | Hardware lock: low state disables all protected-sector program/erase regardless of software settings; internally pulled high |
| RESET | Reset | Active-low asynchronous abort; terminates ongoing operation and resets internal state machine; recommended tied high if unused |
| VCC | Power Supply | 2.5V or 2.7V–3.6V input; powers core logic and Flash array; must be stable before CS assertion |
| GND | Ground | Reference return path for VCC and I/O; requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | 2 × 256-/264-byte buffers enable simultaneous data reception and Flash programming - eliminates write latency bottlenecks in streaming applications |
| Continuous Array Read | Single-command sequential read across full 8 Mbit array at up to 66 MHz - ideal for XIP (execute-in-place) boot code loading without address management |
| Sector Lockdown | Hardware-enforced permanent locking of individual sectors after programming - 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 - supports secure boot authentication and device identity binding |
| Flexible Erase Options | Page/Block/Sector/Chip erase modes allow optimal wear leveling and partial firmware updates - reduces update time and extends Flash lifetime |
| JEDEC ID Support | Standard manufacturer (0x1F) and device (0x26) ID read commands - enables automatic part identification and BOM validation in production test |
Applications
| Firmware Storage | Secure Boot Configuration |
|---|---|
|
Use Scenario: Storing bootloader and application firmware images in resource-constrained microcontroller-based edge nodes. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast sequential read access for code shadowing into RAM during startup. Use Value: Continuous Array Read at 66 MHz enables sub-100 ms firmware load times; 20-year data retention ensures field-deployed reliability without refresh. |
Use Scenario: Holding immutable root-of-trust keys and signed firmware manifests in IoT gateways requiring FIPS-aligned secure boot. IC Role / Device Role / Timing Role: Secure configuration storage with hardware sector lockdown and unique device identifier for cryptographic binding. Use Value: 128-byte security register with 64-byte unique ID enables device-specific key derivation; sector lockdown prevents runtime tampering of boot assets. |
| Industrial Data Logging | Audio/Imaging Buffer Extension |
|
Use Scenario: Cyclic logging of sensor telemetry (temperature, pressure, vibration) in programmable logic controllers with limited RAM. IC Role / Device Role / Timing Role: High-endurance, low-power nonvolatile buffer supporting frequent small writes with wear-leveling via page/block erase flexibility. Use Value: 100,000 program/erase cycles per page and 25 µA standby current extend battery life in unattended monitoring deployments. |
Use Scenario: Extending audio playback or image preview buffers in portable medical or diagnostic devices where DRAM is cost-prohibitive. IC Role / Device Role / Timing Role: Dual SRAM buffers act as ping-pong staging areas for real-time streaming between host processor and Flash array. Use Value: Concurrent buffer fill and Flash write eliminates pipeline stalls - enables uninterrupted 48 kHz stereo audio streaming or HD image buffering. |
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; fixed 256-byte pages; no SRAM buffers; no sector lockdown; 100 MHz max clock | Lacks dual-buffer streaming and hardware security features; better suited for simple code storage without runtime reprogramming needs | Select when maximum read speed and lowest cost are prioritized over secure update capabilities and concurrent I/O |
| Microchip SST26VF064B-104I/MF | 64 Mbit HyperBus-compatible serial Flash; 256-byte pages; no SRAM buffers; no dedicated security register; 104 MHz max | Higher density but lacks DataFlash's buffer-assisted streaming and sector lockdown; requires different controller interface | Choose for larger firmware images where HyperBus interface is already implemented and security requirements are minimal |
Compared with W25Q80DVSSIG and SST26VF064B-104I/MF, the AT45DB081D-SU-SL383-AD uniquely delivers integrated SRAM buffers for zero-latency streaming, factory-configurable page size for legacy compatibility, and hardware-enforced sector lockdown - making it optimal for secure, real-time embedded firmware storage with frequent field updates.
Availability
AT45DB081D-SU-SL383-AD is available at Aetrix Electronics and suitable for firmware storage, secure boot configuration, industrial data logging, and audio/imaging buffer extension requiring stable component supply and long-term lifecycle support.
Supply support for AT45DB081D-SU-SL383-AD 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 Electronics) specialized in low-power, high-reliability serial Flash and nonvolatile memory solutions for industrial and IoT applications.
The AT45DB081D-SU-SL383-AD belongs to the DataFlash® family, designed specifically for embedded systems needing efficient code shadowing, secure firmware updates, and deterministic streaming I/O - not general-purpose NOR/NAND replacement.
FAQ
What is the maximum clock frequency supported by AT45DB081D-SU-SL383-AD for continuous array read operations?
The AT45DB081D-SU-SL383-AD supports continuous array read at up to 66 MHz using the RapidS™ interface (opcodes 0BH and E8H). This is specified as fCAR1 in the datasheet and applies to both 256-byte and 264-byte page configurations. The device remains fully SPI Mode 0/3 compatible at this speed, enabling direct integration with standard microcontroller SPI peripherals without custom timing logic.
Does AT45DB081D-SU-SL383-AD support true byte-level writes like EEPROM?
The AT45DB081D-SU-SL383-AD does not support true byte-level writes, but provides EEPROM emulation through its internal three-step read-modify-write operation using the two SRAM buffers. This allows bit- or byte-alterability in software without requiring external RAM - however, actual Flash programming still occurs at page granularity (256/264 bytes), and endurance is rated per page (100,000 cycles).
How is page size configured on AT45DB081D-SU-SL383-AD - via hardware or software?
Page size on the AT45DB081D-SU-SL383-AD is factory-configurable during manufacturing and cannot be changed in-circuit. The device ships either as 256-byte (power-of-2) or 264-byte (DataFlash standard) page format. Software commands and addressing schemes differ between the two variants - users must select the correct opcode and address bit layout (e.g., PA11–PA0 vs. A19–A0) based on the configured page size.
What happens to the SRAM buffers during a chip erase operation on AT45DB081D-SU-SL383-AD?
During chip erase, the AT45DB081D-SU-SL383-AD leaves the contents of both SRAM buffers unchanged. Chip erase only affects the main Flash memory array (4,096 pages), preserving buffer data for immediate use post-erase. This behavior enables safe preparation of new firmware in buffers while erasing old code - critical for atomic firmware updates without intermediate storage loss.
Is AT45DB081D-SU-SL383-AD pin-compatible with earlier AT45DB081B or AT45DB081C versions?
No, the AT45DB081D-SU-SL383-AD is not pin-compatible with AT45DB081B or AT45DB081C. While all share the same 8-pin SOIC package and basic signal mapping (CS, SCK, SI, SO, WP, RESET, VCC, GND), the AT45DB081D introduces functional changes including enhanced security register structure, updated sector architecture, and revised timing parameters. Hardware redesign and firmware validation are required for migration.
AT45DB081D-SU-SL383-AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
AT45DB081D-SU-SL383-AD FAQ
1.How can I place an order for AT45DB081D-SU-SL383-AD through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SU-SL383-AD 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-SL383-AD reliable?
The price and inventory of AT45DB081D-SU-SL383-AD 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-SL383-AD is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SU-SL383-AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SU-SL383-AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SU-SL383-AD?
AT45DB081D-SU-SL383-AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SU-SL383-AD 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-SL383-AD?
For technical support, including AT45DB081D-SU-SL383-AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SU-SL383-AD requirements.
6.How does Aetrix verify that AT45DB081D-SU-SL383-AD is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SU-SL383-AD 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-SL383-AD meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SU-SL383-AD?
All AT45DB081D-SU-SL383-AD units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SU-SL383-AD, 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-SL383-AD part is unused and in its original packaging.
Return procedure for AT45DB081D-SU-SL383-AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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