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Renesas AT45DB081D-SSU SL383-AD
- Part No.:
- AT45DB081D-SSU SL383-AD
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB081D-SSU SL383-AD.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,116
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Product details
Overview
AT45DB081D-SSU SL383-AD from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface (up to 66 MHz), dual 256/264-byte SRAM buffers, and flexible page/block/sector/chip erase architecture. It operates from a single 2.5V–3.6V supply, supports continuous array read for code shadowing, and features hardware write protection, sector lockdown, and a 128-byte security register. Used in embedded firmware storage, voice/image buffering, and industrial data logging.
For engineers reviewing the AT45DB081D-SSU SL383-AD datasheet, AT45DB081D-SSU SL383-AD pinout, AT45DB081D-SSU SL383-AD application, or AT45DB081D-SSU SL383-AD equivalent, key selection criteria include its 256/264-byte configurable page size, 100,000 program/erase cycles per page, 20-year data retention, industrial temperature range (−40°C to +85°C), and RoHS-compliant SOIC-8 packaging.
Technical Context
The AT45DB081D-SSU SL383-AD implements a sequential-access Flash architecture using a 3-wire SPI interface (CS, SCK, SI/SO) with modes 0 and 3 compatibility. Its memory is organized as 4,096 pages of either 256 or 264 bytes, backed by two independent SRAM buffers enabling concurrent receive-and-program operation.
It supports four erase granularities-page (256 B), block (2 KB), sector (64 KB), and chip (8 Mbit)-with all operations self-timed and status-register monitored. The device integrates hardware write protection (WP pin), software-controlled sector lock/unlock, and a unique 64-byte device identifier within its 128-byte security register.
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 RapidS™ SPI (modes 0/3), enabling >8 MB/s sequential read throughput |
| Supply Voltage | 2.5V or 2.7V–3.6V single supply - eliminates need for charge pumps or dual rails |
| 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 and data logging |
| Data Retention | 20 years at 85°C - validated for long-life industrial deployments without refresh |
| Operating Temperature | −40°C to +85°C industrial grade - qualified for harsh environmental operation |
| Package | SOIC-8 (300 mil), RoHS-compliant, Pb/halide-free - standard footprint for automated assembly |
Pinout & Package
AT45DB081D-SSU SL383-AD is housed in an 8-pin SOIC (300 mil) package with gull-wing leads. Pin 1 is marked by a notch or dot; the metal pad on bottom of MLF variants is floating or GND-connected, but this SOIC variant has no exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: falling edge initiates command; rising edge terminates operation and places SO in high-Z |
| SCK | Serial Clock | Input clock controlling data timing; SI latched on rising edge, SO driven on falling edge |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol with no internal pull-up |
| SO | Serial Output | Read data output; tri-stated when CS is high; supports daisy-chain or shared-bus configurations |
| WP | Write Protect | Hardware-level sector protection override: low = locks protected sectors regardless of software state |
| RESET | Reset Input | 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; must be stable before CS assertion |
| GND | Ground Reference | System ground return; requires low-impedance connection to minimize noise coupling into SO/SI |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers (256/264 B each) | Enables simultaneous data reception into one buffer while programming the other into Flash - eliminates host wait states during page writes |
| Configurable Page Size | Factory-set to 256-byte (power-of-2) or 264-byte (DataFlash standard) mode - simplifies alignment for legacy EEPROM emulation or streaming applications |
| Continuous Array Read (E8H/0BH/03H) | Auto-incrementing internal address counter allows uninterrupted streaming from any start address - ideal for boot code shadowing without address retransmission |
| Sector Lockdown & Security Register | 128-byte dedicated register with 64-byte user space + 64-byte unique ID - enables secure firmware signing, device authentication, and tamper-resistant parameter storage |
| Flexible Erase Granularity | Page (256 B), block (2 KB), sector (64 KB), or full-chip erase - minimizes wear on unused regions and optimizes update latency for partial firmware patches |
| Hardware Write Protection (WP) | Independent of software protection logic - ensures critical sectors remain immutable even if firmware is compromised or misconfigured |
Applications
| Firmware Storage | Voice/Image Buffering |
|---|---|
Use Scenario: Storing bootloader and application firmware in microcontroller-based edge nodes requiring field-upgradable code. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast sequential read and atomic page update capability. Use Value: Continuous Array Read at 66 MHz enables zero-wait-state shadowing into RAM; 100K endurance supports >10 years of quarterly OTA updates. |
Use Scenario: Capturing and buffering audio samples or sensor images in portable medical or industrial recorders. IC Role / Device Role / Timing Role: High-speed, low-power intermediate storage between ADC/DSP and host processor or SD card. Use Value: Dual buffers allow real-time capture into Buffer 1 while Buffer 2 streams to Flash - eliminating dropped frames during write latency. |
| Industrial Data Logging | Secure Configuration Storage |
Use Scenario: Recording timestamped sensor readings in PLCs or energy meters with extended retention and power-loss resilience. IC Role / Device Role / Timing Role: Reliable, low-voltage, sector-protected nonvolatile memory for cyclic data ring buffers. Use Value: Sector Erase isolates log partitions; 20-year retention ensures data integrity across product lifecycle without refresh circuitry. |
Use Scenario: Storing calibrated coefficients, cryptographic keys, and device-specific parameters in IoT gateways and smart meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault leveraging sector lockdown and unique device ID. Use Value: 128-byte security register provides authenticated, write-once storage for keys - preventing unauthorized reprogramming or cloning. |
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, no configurable page size | Lacks dual-buffer streaming and continuous read optimization - less suited for real-time capture or code shadowing | Choose for QSPI bus compatibility and higher peak bandwidth where buffer concurrency is unnecessary |
| Macronix MX25L8006EM1I-12G | 8 Mbit standard SPI, 80 MHz max, no SRAM buffers, fixed 256-byte pages, no security register | No hardware write protect pin or sector lockdown - requires full software-based protection scheme | Choose for cost-sensitive designs needing basic SPI Flash without advanced data integrity or streaming features |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-SSU SL383-AD uniquely delivers concurrent buffer operation, factory-configurable page size, and integrated hardware/software security - making it optimal for deterministic real-time storage and secure embedded firmware.
Availability
AT45DB081D-SSU SL383-AD is available at Aetrix Electronics and suitable for firmware storage, voice/image buffering, and industrial data logging requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT45DB081D-SSU 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 in 2020, now part of Renesas) specialized in low-power, high-reliability nonvolatile memory and analog ICs for industrial and IoT applications.
The AT45DB081D-SSU SL383-AD belongs to the DataFlash® family, designed specifically for embedded systems needing seamless code shadowing, real-time data buffering, and secure configuration storage without complex parallel bus interfaces.
FAQ
What is the maximum clock frequency supported by the AT45DB081D-SSU SL383-AD for continuous array read?
The AT45DB081D-SSU SL383-AD supports up to 66 MHz for Continuous Array Read using opcodes E8H (legacy) or 0BH (high-frequency mode), as specified by the fCAR1 timing parameter. This enables sustained read throughput exceeding 8 MB/s, ideal for boot code shadowing and streaming applications where minimal host intervention is required.
Does the AT45DB081D-SSU SL383-AD require high-voltage programming or external VPP?
No, the AT45DB081D-SSU SL383-AD performs all program and erase operations using only its standard 2.5V–3.6V supply - no external VPP or charge pump is needed. This simplifies power design and improves system reliability, especially in battery-powered or low-voltage industrial environments where generating auxiliary voltages is impractical.
How does the dual-buffer architecture of the AT45DB081D-SSU SL383-AD improve system performance?
The AT45DB081D-SSU SL383-AD's two independent 256/264-byte SRAM buffers allow the host to load data into one buffer while the other is being programmed into Flash memory. This overlap eliminates idle time during page programming (tP ≤ 8 ms), enabling true continuous data streaming - critical for real-time audio capture, sensor logging, and firmware updates without data loss.
Can the AT45DB081D-SSU SL383-AD be used as a direct replacement for standard SPI NOR Flash devices?
The AT45DB081D-SSU SL383-AD is not pin- or command-compatible with standard SPI NOR Flash (e.g., Winbond or Macronix parts). It uses a proprietary RapidS™ instruction set, sequential addressing, and buffer-centric operations. Migration requires firmware changes to handle buffer management, page-aligned writes, and continuous read addressing - it is not a drop-in replacement.
What security features are implemented in the AT45DB081D-SSU SL383-AD?
The AT45DB081D-SSU SL383-AD includes hardware write protection (WP pin), software-controllable sector protection, sector lockdown (irreversible lock), and a 128-byte security register containing 64-byte user-programmable space and a unique 64-byte device identifier. These features collectively support secure boot, firmware authenticity verification, and tamper-resistant parameter storage in certified industrial and IoT systems.
AT45DB081D-SSU 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:
- 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-SOIC
AT45DB081D-SSU SL383-AD FAQ
1.How can I place an order for AT45DB081D-SSU SL383-AD through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SSU 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-SSU SL383-AD reliable?
The price and inventory of AT45DB081D-SSU 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-SSU SL383-AD is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SSU SL383-AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SSU SL383-AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SSU SL383-AD?
AT45DB081D-SSU SL383-AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SSU 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-SSU SL383-AD?
For technical support, including AT45DB081D-SSU SL383-AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SSU SL383-AD requirements.
6.How does Aetrix verify that AT45DB081D-SSU SL383-AD is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SSU 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-SSU SL383-AD meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SSU SL383-AD?
All AT45DB081D-SSU SL383-AD units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SSU 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-SSU SL383-AD part is unused and in its original packaging.
Return procedure for AT45DB081D-SSU SL383-AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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