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Renesas AT45DB081D-SU-2.5-SL383
- Part No.:
- AT45DB081D-SU-2.5-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT45DB081D-SU-2.5-SL383.pdf
- Description:
- IC FLASH 8MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
AT45DB081D-SU-2.5-SL383 from Adesto Technologies is an 8-Mbit serial DataFlash memory IC with RapidS™ SPI-compatible interface, 256/264-byte page architecture, dual 256-/264-byte SRAM buffers, and industrial temperature support. It operates from a single 2.5V supply, delivers up to 66MHz read speed, and enables continuous array reads for code shadowing in embedded systems.
For engineers reviewing the AT45DB081D-SU-2.5-SL383 datasheet, AT45DB081D-SU-2.5-SL383 pinout, AT45DB081D-SU-2.5-SL383 application, or AT45DB081D-SU-2.5-SL383 equivalent, key selection criteria include page-size configurability (256 vs. 264 bytes), buffer-assisted concurrent write/read capability, sector-level hardware/software protection, and 100,000 program/erase cycle endurance.
Technical Context
The AT45DB081D-SU-2.5-SL383 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 as 4,096 pages of either 256 or 264 bytes, backed by two independent SRAM buffers that support overlapping data reception and Flash reprogramming.
It supports four erase granularities-page (256B), block (2KB), sector (64KB), and chip (8Mbit)-with all operations self-timed and status-register monitored. Hardware write protection via the WP pin operates independently of software sector lockdown and security register configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8,650,752 bits (8 Mbit), organized as 4,096 × 256/264-byte pages |
| Supply Voltage | 2.5V nominal (2.5V–3.6V range); enables single-rail system integration without level shifters |
| Interface Speed | Up to 66 MHz SCK for Continuous Array Read (fCAR1), supporting real-time streaming |
| Page Size | User-configurable: 256-byte (power-of-2) or 264-byte (DataFlash standard) mode, factory-preconfigurable |
| Endurance | ≥100,000 program/erase cycles per page, ensuring long-term field reliability in logging applications |
| Data Retention | 20 years at 85°C, validated for industrial deployment without refresh cycles |
| Power Consumption | 7 mA active read current; 25 µA standby; 15 µA deep power-down - critical for battery-powered devices |
Pinout & Package
AT45DB081D-SU-2.5-SL383 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) 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 and terminates operation on low-to-high transition |
| SCK | Serial Clock | Input clock; latches SI on rising edge, clocks SO on falling edge - defines timing for all SPI transactions |
| SI | Serial Input | Command, address, and data input line; MSB-first protocol supports opcode + address + payload sequences |
| SO | Serial Output | Tri-state output; drives data during read operations only when CS is asserted and device is not busy |
| WP | Write Protect | Hardware-level sector lock; asserts low to disable programming/erasing of protected sectors regardless of software state |
| RESET | Reset | Active-low asynchronous reset; forces internal state machine into idle state without requiring power cycle |
| VCC | Power Supply | 2.5V–3.6V single supply; powers core logic, Flash array, and I/O buffers simultaneously |
| GND | Ground | Reference return path for VCC; must be low-impedance connection to minimize noise coupling into sensitive Flash operations |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM Buffers | Two independent 256-/264-byte buffers enable simultaneous data reception and Flash reprogramming - eliminates write latency bottlenecks |
| Continuous Array Read | Single-command sequential read across full 8-Mbit array with automatic page-wrap and no inter-page delay - ideal for boot code shadowing |
| Flexible Erase Granularity | Four levels (page/block/sector/chip) allow precise wear leveling and partial firmware updates without full chip erase overhead |
| Hardware + Software Protection | WP pin enforces physical sector lock; Sector Protection Register and Sector Lockdown provide layered, persistent security for firmware partitions |
| Security Register | 128-byte dedicated register: 64-byte user-programmable space + 64-byte unique device ID - supports secure boot and anti-cloning |
Applications
| Voice Recorder Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing firmware and voice prompts in portable digital voice recorders with limited PCB area and strict power budgets. IC Role / Device Role / Timing Role: Nonvolatile storage for executable code and compressed audio assets; supports rapid boot via Continuous Array Read at 66MHz. Use Value: Dual-buffer operation allows background firmware update while recording continues; 25 µA standby current extends battery life between sessions. | Use Scenario: Retaining calibrated sensor offsets, recipe parameters, and safety-critical configuration in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Secure, field-updatable configuration store with hardware write protection against accidental corruption during EMI events. Use Value: Sector lockdown prevents unauthorized modification of safety parameters; 20-year data retention ensures integrity over full product lifecycle without maintenance. |
| Medical Diagnostic Device Log Buffer | Smart Meter Firmware Repository |
Use Scenario: Capturing time-stamped diagnostic measurements and error logs in portable ultrasound or ECG units where data persistence is regulated. IC Role / Device Role / Timing Role: High-endurance Flash memory managing circular log buffers with EEPROM-like byte-alterability via read-modify-write emulation. Use Value: 100,000 program/erase cycles per page meet IEC 62304 requirements; deep power-down mode reduces energy use during idle periods. | Use Scenario: Hosting upgradable metering firmware and tariff tables in ANSI C12.22-compliant smart electricity meters deployed in utility grids. IC Role / Device Role / Timing Role: Trusted firmware repository with JEDEC-standard manufacturer/device ID and security register for cryptographic signature verification. Use Value: Unique 64-byte device ID enables secure provisioning; hardware WP pin ensures tamper-resistant protection during OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT45DB081E-SU | Successor part with enhanced ECC, extended temperature range (−40°C to +105°C), and updated errata handling; identical pinout and command set | Required for new designs targeting extended thermal environments or higher data integrity assurance | Select AT45DB081E-SU when long-term supply continuity and improved reliability under thermal stress are mandatory |
| W25Q80DVSSIG | 8-Mbit Quad SPI Flash with DTR support; lacks dual SRAM buffers, continuous read optimization, and sector lockdown; uses standard SPI commands | Suitable for cost-sensitive applications where buffer concurrency and legacy DataFlash command compatibility are not required | Choose W25Q80DVSSIG only if migrating from parallel Flash and prioritizing broad ecosystem tooling over DataFlash-specific features |
Compared with AT45DB081D-SU-2.5-SL383, the AT45DB081E-SU offers drop-in replacement capability with reliability upgrades, while the W25Q80DVSSIG trades buffer-assisted throughput and security features for broader vendor support and lower unit cost in non-critical applications.
Availability
AT45DB081D-SU-2.5-SL383 is available at Aetrix Electronics and suitable for voice recorder firmware storage, industrial PLC configuration memory, and medical diagnostic device log buffering requiring stable component supply and long-term industrial-grade reliability.
Supply support for AT45DB081D-SU-2.5-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 ultra-low-power, high-reliability nonvolatile memory and IoT connectivity solutions.
The AT45DB081D-SU-2.5-SL383 belongs to the DataFlash® family, designed specifically for embedded systems needing seamless code shadowing, concurrent read/write operation, and robust data security in resource-constrained environments.
FAQ
What is the maximum clock frequency supported by AT45DB081D-SU-2.5-SL383 for continuous array read operations?
The AT45DB081D-SU-2.5-SL383 supports up to 66 MHz for Continuous Array Read using opcodes E8H (legacy) or 0BH (high-frequency mode), as specified by fCAR1. This enables real-time streaming of firmware or audio data without inter-page delays. The 66 MHz limit applies only to continuous read; standard page read (D2H) is governed by the slower fSCK specification. AT45DB081D-SU-2.5-SL383 maintains full functionality across its entire industrial temperature range at this speed.
Does AT45DB081D-SU-2.5-SL383 support both 256-byte and 264-byte page sizes, and how is the selection made?
Yes, AT45DB081D-SU-2.5-SL383 supports both 256-byte (power-of-2) and 264-byte (DataFlash standard) page configurations. The mode is factory-preconfigured and cannot be changed in-circuit. Addressing differs: 256-byte mode uses A19–A0 addressing, while 264-byte mode uses PA11–PA0 + BA8–BA0. AT45DB081D-SU-2.5-SL383 datasheet Table 2-1 confirms pin-compatible operation in both modes, with command opcodes remaining identical across configurations.
How does the dual-buffer architecture of AT45DB081D-SU-2.5-SL383 improve system-level performance?
The AT45DB081D-SU-2.5-SL383 integrates two independent 256-/264-byte SRAM buffers that operate concurrently with main memory programming. This allows a host processor to load new data into one buffer while the other buffer's contents are being written to Flash - eliminating idle wait states. AT45DB081D-SU-2.5-SL383 thus enables uninterrupted data acquisition or firmware streaming, a capability absent in standard SPI Flash devices without integrated buffers.
What hardware and software mechanisms protect data integrity in AT45DB081D-SU-2.5-SL383?
AT45DB081D-SU-2.5-SL383 provides layered protection: the WP pin enforces hardware-level sector lock independent of software state; the Sector Protection Register enables software-controlled sector locking; and Sector Lockdown makes protection irreversible until power cycle. Additionally, a 128-byte Security Register contains 64-byte user space and a unique 64-byte device ID. AT45DB081D-SU-2.5-SL383 ensures these features remain active across all operating voltages and temperatures.
Is AT45DB081D-SU-2.5-SL383 suitable for new designs, and what is its lifecycle status?
No - AT45DB081D-SU-2.5-SL383 is marked "Not Recommended for New Designs" in its official datasheet (3596P–DFLASH–2/2014). Adesto recommends migrating to the pin-compatible AT45DB081E-SU, which adds enhanced ECC, extended temperature range, and corrected errata. AT45DB081D-SU-2.5-SL383 remains available for legacy support and existing production, but Aetrix Electronics advises new projects to evaluate AT45DB081E-SU for long-term supply assurance and improved reliability.
AT45DB081D-SU-2.5-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:
- 50 MHz
- Write Cycle Time - Word, Page:
- 4ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT45DB081D-SU-2.5-SL383 FAQ
1.How can I place an order for AT45DB081D-SU-2.5-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SU-2.5-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-2.5-SL383 reliable?
The price and inventory of AT45DB081D-SU-2.5-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-2.5-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SU-2.5-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SU-2.5-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SU-2.5-SL383?
AT45DB081D-SU-2.5-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SU-2.5-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-2.5-SL383?
For technical support, including AT45DB081D-SU-2.5-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SU-2.5-SL383 requirements.
6.How does Aetrix verify that AT45DB081D-SU-2.5-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SU-2.5-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-2.5-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SU-2.5-SL383?
All AT45DB081D-SU-2.5-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SU-2.5-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-2.5-SL383 part is unused and in its original packaging.
Return procedure for AT45DB081D-SU-2.5-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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