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Renesas AT45DB081D-SU-SL383
- Part No.:
- AT45DB081D-SU-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB081D-SU-SL383.pdf
- Description:
- IC FLASH 8MBIT SPI 66MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,235
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Product details
Overview
AT45DB081D-SU-SL383 from Adesto Technologies is an 8 Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, organized as 4,096 pages of 256- or 264-byte capacity, supporting up to 66 MHz clock frequency and continuous array read for code shadowing in embedded microcontroller systems.
For engineers reviewing the AT45DB081D-SU-SL383 datasheet, AT45DB081D-SU-SL383 pinout, AT45DB081D-SU-SL383 application, or AT45DB081D-SU-SL383 equivalent, key selection criteria include page-size configurability (256/264-byte), dual 256-/264-byte SRAM buffers for concurrent I/O, sector lockdown security, and industrial temperature operation with 100,000 program/erase cycles.
Technical Context
The AT45DB081D-SU-SL383 implements a sequential-access Flash architecture using a 3-wire SPI-compatible RapidS interface (modes 0 and 3), eliminating parallel address/data buses to reduce pin count and layout complexity. Its memory is hierarchically segmented into 16 sectors (including split Sector 0a/0b), 512 blocks (8 pages each), and 4,096 individually programmable pages.
Two independent 256-/264-byte SRAM buffers enable simultaneous data reception and Flash reprogramming - critical for streaming firmware updates or real-time logging. All erase (page/block/sector/chip) and program operations are fully self-timed, with status register polling supported via RDY/BSY flag.
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 (0BH/E8H opcodes), enabling >8 MB/s sustained throughput |
| Supply Voltage | 2.5V or 2.7V–3.6V single supply - supports 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 |
| Endurance & Retention | 100,000 program/erase cycles per page; 20-year data retention at industrial temperature range (–40°C to +85°C) |
| Security Features | 128-byte security register (64-byte user-programmable + 64-byte unique device ID); sector lockdown and hardware write protect (WP) |
| Erase Granularity | Page (256 B), block (2 KB), sector (64 KB), or chip (8 Mbit) - enables fine-grained wear leveling and partial firmware updates |
Pinout & Package
AT45DB081D-SU-SL383 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; deassertion places SO in high-Z and enters standby mode |
| SCK | Serial Clock | Master-generated clock; SI data latched on rising edge; SO data output on falling edge - supports SPI modes 0 and 3 |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol; requires stable setup/hold relative to SCK rising edge |
| SO | Serial Output | Data output path for reads; tri-stated when CS is high; synchronized to SCK falling edge |
| WP | Write Protect | Hardware-level sector protection override; low-active; independent of software protection registers; internally pulled high |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operation and returns state machine to idle; internal POR eliminates external RC need |
| VCC | Power Supply | 2.5V or 2.7V–3.6V single supply; powers core logic, Flash array, and buffers; decoupling capacitor required near pin |
| GND | Ground Reference | System ground return; must be low-impedance connection to minimize noise coupling during high-speed reads/writes |
Key Features
| Feature | Design Value |
|---|---|
| User-configurable page size | Factory-set 256-byte (power-of-2) or default 264-byte (DataFlash standard) page format - simplifies EEPROM emulation and alignment-aware firmware design |
| Dual SRAM buffers | Two independent 256-/264-byte buffers allow overlapping data reception and Flash programming - eliminates I/O stalls during page writes |
| Continuous array read | Single-command sequential read across full 8 Mbit array with automatic page-wrap and no inter-page delay - ideal for XIP code shadowing |
| Flexible erase hierarchy | Four-tier erase (page/block/sector/chip) enables precise wear leveling, partial firmware updates, and secure sector erasure without affecting protected regions |
| Hardware + software security | Combines WP pin-based sector lockout with 128-byte security register (64-byte UID + 64-byte user space) - meets basic secure boot and credential storage requirements |
Applications
| Industrial HMI Firmware Storage | Medical Device Log Buffering |
|---|---|
|
Use Scenario: Storing GUI assets, configuration profiles, and firmware images in touch-panel HMIs deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code and data storage with rapid sequential read capability for fast UI rendering and field-upgradable firmware. Use Value: Continuous array read at 66 MHz enables zero-latency code shadowing into MCU RAM; sector lockdown protects bootloader partition from accidental overwrite. |
Use Scenario: Capturing time-stamped sensor readings and diagnostic events in portable ultrasound or infusion pumps with limited PCB area. IC Role / Device Role / Timing Role: High-reliability data logger with concurrent buffer write and Flash page program - sustains burst sampling without data loss. Use Value: Dual SRAM buffers permit uninterrupted data ingestion while background Flash programming occurs; 20-year retention ensures audit trail integrity over device lifetime. |
| Smart Meter Firmware Updates | Automotive Telematics Event Recorder |
|
Use Scenario: Secure over-the-air (OTA) firmware patching in ANSI C12.19-compliant electricity meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: Trusted update storage with hardware write protection and unique device ID for cryptographic signature verification. Use Value: WP pin + sector lockdown prevents malicious or corrupted OTA payloads from overwriting critical calibration tables; JEDEC ID enables automated BOM validation. |
Use Scenario: Recording CAN bus diagnostics, GPS timestamps, and driver behavior metrics in fleet telematics gateways installed in vehicle engine bays. IC Role / Device Role / Timing Role: Ruggedized non-volatile event buffer supporting frequent small writes and infrequent bulk reads under thermal stress. Use Value: Page-erase granularity minimizes write latency for timestamped entries; industrial temp rating (–40°C to +85°C) ensures reliability in under-hood deployments. |
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; 133 MHz max clock | Lacks concurrent buffer operation and hardware sector protection; better suited for simple code storage than streaming data logging | Select if higher clock speed and lower cost are prioritized over buffered I/O and security features |
| Macronix MX25L8006EM1I-12G | 8 Mbit SPI NOR Flash; 256-byte pages; no SRAM buffers; software-controlled sector protection only; 80 MHz max clock | No hardware WP pin or dedicated security register; relies solely on software commands for protection | Choose when legacy SPI NOR compatibility and broad distributor availability outweigh need for DataFlash-specific features |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-SU-SL383 uniquely delivers dual SRAM buffers for seamless streaming, factory-configurable page size for EEPROM emulation, and integrated hardware write protection - making it optimal for real-time embedded data acquisition where I/O concurrency and security are mandatory.
Availability
AT45DB081D-SU-SL383 is available at Aetrix Electronics and suitable for industrial HMI firmware storage, medical device log buffering, smart meter firmware updates, automotive telematics event recording, and secure code shadowing requiring stable component supply and long-term lifecycle support.
Supply support for AT45DB081D-SU-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 in 2020, now part of Renesas Electronics) specialized in low-power, high-performance serial Flash and conductive polymer memory solutions for IoT and embedded systems.
The AT45DB081D-SU-SL383 belongs to the DataFlash® family, designed specifically for applications demanding concurrent read/write operations, rapid sequential access, and robust security - targeting resource-constrained microcontroller platforms needing reliable, low-pin-count non-volatile storage.
FAQ
What is the maximum clock frequency supported by AT45DB081D-SU-SL383 for continuous array read operations?
The AT45DB081D-SU-SL383 supports up to 66 MHz for Continuous Array Read using opcodes 0BH (high-frequency mode) and E8H (legacy mode), delivering sustained throughput exceeding 8 MB/s. This performance is enabled by its RapidS™ serial interface and applies to both 256-byte and 264-byte page configurations. The 66 MHz limit is defined by the fCAR1 timing specification in the official datasheet.
Does AT45DB081D-SU-SL383 support true byte-level writes like EEPROM, or is it page-oriented?
The AT45DB081D-SU-SL383 does not support true byte-level writes. All programming occurs at the page level (256 or 264 bytes). However, EEPROM emulation is achievable via a self-contained three-step read-modify-write operation using its dual SRAM buffers - allowing logical byte/bit alteration without external MCU intervention. This differs fundamentally from NOR/NAND Flash that lacks integrated buffers.
How does the hardware Write Protect (WP) pin interact with software-based sector protection on AT45DB081D-SU-SL383?
On the AT45DB081D-SU-SL383, the WP pin provides unconditional hardware-level protection: when asserted (low), it overrides all software protection settings and locks specified sectors against program/erase regardless of Sector Protection Register state. Crucially, WP does not block Enable Sector Protection or Sector Lockdown commands - enabling secure provisioning even with WP active. This layered approach ensures tamper-resistant configuration.
What package type and footprint does AT45DB081D-SU-SL383 use, and is it RoHS compliant?
The AT45DB081D-SU-SL383 uses an 8-pin SOIC (Small Outline Integrated Circuit) package with 150-mil body width and standard gull-wing leads. It is explicitly certified as green, Pb/Halide-free, and RoHS compliant per the manufacturer's documentation. The "SL383" suffix denotes this specific SOIC packaging variant, distinct from MLF/VDFN alternatives offered in the same family.
Can AT45DB081D-SU-SL383 operate from a 2.5V supply, and what are the implications for system design?
Yes, the AT45DB081D-SU-SL383 is fully specified for 2.5V ±0.2V operation (as well as 2.7V–3.6V), enabling direct integration with 2.5V microcontrollers and FPGAs without level-shifting circuitry. This reduces BOM cost and board space while maintaining full 66 MHz interface performance and 100,000-cycle endurance. System designers must ensure VCC decoupling meets datasheet requirements to prevent read instability at 2.5V.
AT45DB081D-SU-SL383 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SU-SL383 FAQ
1.How can I place an order for AT45DB081D-SU-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SU-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-SU-SL383 reliable?
The price and inventory of AT45DB081D-SU-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-SU-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SU-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SU-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SU-SL383?
AT45DB081D-SU-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SU-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-SU-SL383?
For technical support, including AT45DB081D-SU-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SU-SL383 requirements.
6.How does Aetrix verify that AT45DB081D-SU-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SU-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-SU-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SU-SL383?
All AT45DB081D-SU-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SU-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-SU-SL383 part is unused and in its original packaging.
Return procedure for AT45DB081D-SU-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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