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Renesas AT45DB081D-SSU-2.5
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- Part No.:
- AT45DB081D-SSU-2.5
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT45DB081D-SSU-2.5.pdf
- Description:
- IC FLASH 8MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,873
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Product details
Overview
AT45DB081D-SSU-2.5 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 up to 66 MHz read speed, 100,000 program/erase cycles per page, and 20-year data retention for embedded code shadowing and firmware storage.
For engineers reviewing the AT45DB081D-SSU-2.5 datasheet, AT45DB081D-SSU-2.5 pinout, AT45DB081D-SSU-2.5 application, or AT45DB081D-SSU-2.5 equivalent, key selection criteria include page-size flexibility (256 vs. 264 bytes), dual-buffered concurrent read/write capability, hardware write protection via WP pin, sector lockdown security, and SOIC-8 packaging compatibility with legacy board layouts.
Technical Context
The AT45DB081D-SSU-2.5 implements a sequential-access Flash architecture using a three-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, partitioned into 16 sectors with hierarchical erase granularity (page/block/sector/chip).
Two independent SRAM buffers enable simultaneous data reception and Flash reprogramming - critical for real-time firmware updates. All erase and program operations are self-timed, eliminating external timing control, and the device supports EEPROM emulation via internal read-modify-write sequences without external high-voltage circuitry.
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 (fCAR1), supporting high-throughput code execution |
| Supply Voltage | 2.5 V or 2.7–3.6 V single supply - enables direct integration with 2.5 V logic and mixed-voltage systems |
| Power Consumption | 7 mA typical active read current; 25 µA standby; 15 µA deep power-down - suitable for battery-backed and low-power IoT nodes |
| Erase Endurance | ≥100,000 program/erase cycles per page - ensures long-term reliability in field-upgradable devices |
| Data Retention | 20 years at 85°C - validated for industrial deployments requiring extended service life without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications including motor control and sensor hubs |
Pinout & Package
AT45DB081D-SSU-2.5 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard 150-mil body width and RoHS-compliant lead finish. Pin 1 is marked with a notch or dot; the package is compatible with automated PCB assembly and reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; initiates command sequence on high-to-low transition and terminates operation on low-to-high transition |
| SCK | Serial Clock | Input clock controlling data transfer timing; commands and addresses latched on rising edge, SO data output on falling edge |
| SI | Serial Input | Command, address, and data input line; MSB-first protocol supports opcode + address + payload streaming |
| SO | Serial Output | Tri-state output for read data; high-impedance when CS is deasserted to prevent bus contention |
| WP | Write Protect | Hardware-level sector lock override; low assertion blocks all protected-sector programming/erasing regardless of software settings |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns state machine to idle without requiring power cycle |
| VCC | Power Supply | 2.5 V or 2.7–3.6 V supply input; powers core logic, Flash array, and I/O buffers simultaneously |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling during high-speed reads |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Page Size | Factory-set 256-byte (power-of-2) or user-selectable 264-byte (DataFlash standard) mode - simplifies alignment for legacy bootloader or custom file systems |
| Dual SRAM Buffers | 2 × 256-/264-byte independent buffers - enables seamless background writes while executing code from Flash or streaming continuous data |
| Continuous Array Read | Single-command, wrap-around sequential read across full 8 Mbit array at up to 66 MHz - eliminates address overhead for boot code shadowing |
| Sector Lockdown Security | Hardware-enforced read/write lock per sector using dedicated lockdown register - prevents unauthorized firmware modification in certified safety-critical systems |
| 128-Byte Security Register | 64-byte user-programmable space + 64-byte unique device ID - supports secure boot key storage and device authentication without external crypto IC |
Applications
| Firmware Storage | Code Shadowing |
|---|---|
Use Scenario: Storing MCU boot firmware and field-upgradable application binaries in resource-constrained industrial controllers. IC Role / Device Role / Timing Role: Nonvolatile storage medium accessed via SPI during cold start and OTA update cycles; supports atomic page writes and sector-locked protection. Use Value: Eliminates need for external EEPROM or parallel NOR Flash, reducing BOM count and PCB area while enabling secure, wear-leveled firmware updates. | Use Scenario: Loading executable code from Flash into RAM for execution in microcontrollers with limited internal Flash (e.g., ARM Cortex-M0+). IC Role / Device Role / Timing Role: High-speed sequential read source for instruction fetch; leverages Continuous Array Read mode to sustain >6 MB/s throughput at 66 MHz. Use Value: Enables deterministic execution timing by avoiding slow random-access latency of traditional serial Flash, improving real-time response in motor drives. |
| Data Logging | Secure Configuration Storage |
Use Scenario: Recording sensor readings, error logs, or calibration data in medical diagnostic equipment with power-loss resilience. IC Role / Device Role / Timing Role: Buffered write target using dual-SRAM architecture; accepts new samples while previous buffer contents are programmed into Flash. Use Value: Guarantees no data loss during unexpected power interruption due to atomic buffer-to-page commit and 100k-cycle endurance. | Use Scenario: Storing cryptographic keys, calibration coefficients, and regulatory compliance parameters in networked smart meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration store using Sector Lockdown and 128-byte Security Register with unique device ID. Use Value: Meets IEC 62443-3-3 requirements for secure parameter storage without adding discrete secure elements or increasing bill-of-materials cost. |
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) interface; 104 MHz max clock; no dual SRAM buffers; fixed 256-byte pages | Lacks continuous-read optimization and concurrent buffer operation - less efficient for code shadowing or streaming log capture | Select when QSPI host interface is available and buffer concurrency is not required; lower cost in high-volume consumer designs |
| Macronix MX25L8006EM1I-12G | 8 Mbit standard SPI; 80 MHz max clock; no configurable page size; no sector lockdown or security register | No hardware-based sector protection or unique device ID - requires external security layer for certified applications | Select for cost-sensitive industrial controls where basic firmware storage suffices and security features are managed externally |
Compared with W25Q80DVSSIG and MX25L8006EM1I-12G, the AT45DB081D-SSU-2.5 uniquely combines dual-buffer concurrency, factory-configurable page size, and integrated sector lockdown - making it optimal for safety-certified, field-upgradable embedded systems where deterministic timing and tamper resistance are mandatory.
Availability
AT45DB081D-SSU-2.5 is available at Aetrix Electronics and suitable for firmware storage, code shadowing, data logging, and secure configuration storage requiring stable component supply and long-term industrial lifecycle support.
Supply support for AT45DB081D-SSU-2.5 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 nonvolatile memory and analog ICs for industrial and IoT applications.
The AT45DB081D-SSU-2.5 belongs to the DataFlash® family, designed specifically for embedded systems needing fast, flexible, and secure serial Flash with concurrent read/write capability - targeting applications where traditional SPI Flash lacks throughput or robustness.
FAQ
What is the maximum clock frequency supported by AT45DB081D-SSU-2.5 for continuous array read operations?
The AT45DB081D-SSU-2.5 supports up to 66 MHz for Continuous Array Read using opcodes E8H (legacy) or 0BH (high-frequency mode), as specified by fCAR1 in the datasheet. This enables sustained data throughput exceeding 6 MB/s, ideal for boot code shadowing and real-time streaming applications where latency must be minimized.
Does AT45DB081D-SSU-2.5 support both 256-byte and 264-byte page sizes, and how is the selection made?
Yes, AT45DB081D-SSU-2.5 supports both 256-byte (power-of-2) and 264-byte (DataFlash standard) page configurations. The page size is factory pre-configured at wafer level and cannot be changed in-system. Designers must select the appropriate variant (e.g., -SSU-2.5 for 256-byte or -SSHD-2.5 for 264-byte) based on their firmware alignment and addressing requirements before procurement.
How does the dual SRAM buffer architecture in AT45DB081D-SSU-2.5 improve system performance?
The AT45DB081D-SSU-2.5 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 wait states and enabling uninterrupted data acquisition or firmware patching without halting system operation.
Can AT45DB081D-SSU-2.5 be used in systems requiring secure firmware storage with hardware-based protection?
Yes, AT45DB081D-SSU-2.5 provides hardware-enforced security through individual sector lockdown, a 128-byte Security Register (64-byte user space + 64-byte unique device ID), and independent WP pin control. These features allow certified applications - such as medical devices or smart grid endpoints - to meet IEC 62443 and UL 60730 requirements without adding external secure elements or complex software key management.
Is AT45DB081D-SSU-2.5 compatible with standard SPI controllers, and which modes does it support?
Yes, AT45DB081D-SSU-2.5 is fully compatible with standard SPI controllers and supports SPI Modes 0 and 3 (CPOL=0/1, CPHA=0). Its RapidS™ interface uses standard SI/SO/SCK/CS signaling with MSB-first data framing, requiring no proprietary drivers or protocol translation - ensuring drop-in compatibility with existing ARM, RISC-V, and MCU-based designs using generic SPI peripherals.
AT45DB081D-SSU-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- 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-SSU-2.5 FAQ
1.How can I place an order for AT45DB081D-SSU-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB081D-SSU-2.5 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-2.5 reliable?
The price and inventory of AT45DB081D-SSU-2.5 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-2.5 is usually 5 days.
3.What payment methods are accepted for AT45DB081D-SSU-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB081D-SSU-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB081D-SSU-2.5?
AT45DB081D-SSU-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB081D-SSU-2.5 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-2.5?
For technical support, including AT45DB081D-SSU-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB081D-SSU-2.5 requirements.
6.How does Aetrix verify that AT45DB081D-SSU-2.5 is sourced from the original manufacturer or authorized distributors?
All AT45DB081D-SSU-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of AT45DB081D-SSU-2.5?
All AT45DB081D-SSU-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB081D-SSU-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for AT45DB081D-SSU-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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