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Renesas AT45DB321D-CCU-SL383
- Part No.:
- AT45DB321D-CCU-SL383
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 24-TBGA, CSPBGA
- Datasheet:
-
AT45DB321D-CCU-SL383.pdf
- Description:
- IC FLASH 32MBIT SPI 66MHZ 24CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,941
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Product details
Overview
AT45DB321D-CCU-SL383 from Microchip Technology (formerly Atmel) is a 32Mb serial DataFlash memory IC with SPI-compatible RapidS interface, 66MHz max clock, dual 512/528-byte SRAM buffers, and flexible page/block/sector/chip erase architecture. It operates from a single 2.5V–3.6V supply and supports code shadowing in embedded boot loaders.
For engineers reviewing the AT45DB321D-CCU-SL383 datasheet, AT45DB321D-CCU-SL383 pinout, AT45DB321D-CCU-SL383 application, or AT45DB321D-CCU-SL383 equivalent, key selection criteria include verified 512/528-byte configurable page size, 100,000 program/erase cycles per page, industrial temperature range (–40°C to +85°C), hardware write protection (WP), and RDY/BUSY open-drain status signaling.
Technical Context
The AT45DB321D-CCU-SL383 implements a sequential-access flash architecture with two independent 512/528-byte SRAM buffers enabling concurrent data reception and flash reprogramming. Its RapidS serial interface supports SPI modes 0 and 3 at up to 66MHz, eliminating address bus overhead and reducing pin count versus parallel NOR/NAND.
Memory organization comprises 8,192 pages (512 or 528 bytes each), grouped into 64 sectors with asymmetric sub-sector layout (e.g., Sector 0a = 8 pages, Sector 0b = 120 pages). Erase granularity spans page (512B), block (4KB), sector (64KB), and full chip (32Mb), all self-timed with RDY/BUSY pin indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 32Mb (34,603,008 bits) organized as 8,192 × 512/528-byte pages |
| Interface speed | Up to 66MHz SCK for continuous array read (0BH/E8H opcodes); supports SPI modes 0 and 3 |
| Supply voltage | Single 2.5V–3.6V or 2.7V–3.6V rail; no high-voltage programming required |
| Endurance & retention | ≥100,000 program/erase cycles per page; 20-year data retention at 85°C |
| Power consumption | 7mA typical active read current; 25µA standby; 15µA deep power-down |
| Operating temperature | Industrial range: –40°C to +85°C |
| Security features | 128-byte security register (64-byte user-programmable + 64-byte unique ID); sector lockdown capability |
Pinout & Package
AT45DB321D-CCU-SL383 uses an 8-pin SOIC package (3.9mm × 4.9mm, 1.27mm pitch) with standard SPI-compatible pin assignment and dedicated control signals for hardware write protection and status monitoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on falling edge, terminates operation on rising edge |
| SCK | Serial Clock | Controls data timing; SI latched on rising edge, SO driven on falling edge |
| SI | Serial Input | Command, address, and data input path; MSB-first protocol |
| SO | Serial Output | Data output path; tri-stated when CS is high |
| WP | Write Protect | Hardware lock for sector protection; overrides software protection when asserted low |
| RESET | Reset | Active-low hard reset; terminates ongoing operations and returns state machine to idle |
| RDY/BUSY | Ready/Busy Status | Open-drain output; pulled low during self-timed program/erase/page-to-buffer transfers |
| VCC / GND | Power / Ground | Single-supply operation; VCC = 2.5V–3.6V; GND referenced for all I/O |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | Two independent 512/528-byte buffers enable simultaneous data streaming and flash reprogramming |
| Configurable page size | Factory-set 512-byte or 528-byte pages; determines address bit allocation (A21–A0 vs PA12–BA9) |
| Continuous array read | Wraparound sequential read across page and array boundaries without delay or host intervention |
| Flexible erase hierarchy | Four-level erase (page/block/sector/chip) minimizes wear and optimizes firmware update granularity |
| Hardware + software security | WP pin provides physical write lock; 128-byte security register enables secure boot and device identity |
Applications
| Boot Code Storage | Firmware Over-the-Air (OTA) Updates |
|---|---|
Use Scenario: Storing primary bootloader and initial firmware image in resource-constrained microcontroller systems. IC Role / Device Role / Timing Role: Nonvolatile storage for executable code accessed via sequential read during cold start. Use Value: Continuous array read (E8H/0BH) enables zero-wait-state code shadowing into RAM, reducing boot latency by eliminating page-boundary stalls. | Use Scenario: Receiving and validating new firmware images in connected industrial gateways. IC Role / Device Role / Timing Role: Dual-buffered staging area for validated firmware before atomic flash commit. Use Value: Buffer-to-main-memory page program with built-in erase (83H/86H) allows background download while preserving active runtime code in flash. |
| Secure Configuration Storage | Digital Audio Buffering |
Use Scenario: Storing calibrated sensor offsets, encryption keys, and device-specific credentials in medical IoT endpoints. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage with hardware write lock and sector lockdown. Use Value: WP pin + sector lockdown prevents unauthorized modification of critical configuration data during field operation or service access. | Use Scenario: Providing low-latency, high-reliability audio sample buffering in voice-controlled home appliances. IC Role / Device Role / Timing Role: High-speed sequential storage for PCM audio streams with minimal CPU overhead. Use Value: 66MHz RapidS interface sustains >8MB/s sustained read throughput, supporting 24-bit/96kHz stereo without DMA bottlenecks. |
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 W25Q32JVSSIQ | 32Mb Quad SPI NOR; 133MHz QSPI clock; no dual buffers; 4KB uniform sectors | Lacks concurrent buffer+flash operation; requires software-managed wear leveling for frequent updates | Preferred where quad I/O bandwidth and smaller erase blocks outweigh need for background programming |
| Macronix MX25L3233FZNI-10G | 32Mb standard SPI NOR; 104MHz max; no SRAM buffers; 4KB/32KB/64KB erase options | No hardware-assisted page buffering; relies on host for erase/program sequencing and status polling | Suitable for cost-sensitive designs requiring JEDEC-compliant SPI flash without advanced DataFlash features |
Compared with W25Q32JVSSIQ and MX25L3233FZNI-10G, the AT45DB321D-CCU-SL383 uniquely delivers dual-buffered concurrent I/O and factory-configurable page size-critical for deterministic firmware update latency and legacy system compatibility-but requires explicit RapidS command handling rather than standard SPI read/write opcodes.
Availability
AT45DB321D-CCU-SL383 is available at Aetrix Electronics and suitable for embedded boot loaders, industrial OTA update systems, and secure configuration storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT45DB321D-CCU-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
Microchip Technology acquired Atmel in 2016 and maintains full support for the DataFlash product family, including technical documentation, validation tools, and long-term manufacturing commitment.
The AT45DB321D-CCU-SL383 belongs to the Atmel DataFlash® series, designed specifically for high-reliability, low-pin-count serial flash applications demanding concurrent buffer access, flexible erase granularity, and hardware-enforced security in industrial and automotive environments.
FAQ
What is the default page size configuration for AT45DB321D-CCU-SL383?
The AT45DB321D-CCU-SL383 is factory preconfigured for 512-byte pages, enabling binary-aligned addressing (A21–A0) and simplified host driver implementation. This setting can be confirmed via the status register or JEDEC ID read; reconfiguration to 528-byte pages requires factory customization and is not user-modifiable in-circuit.
Does AT45DB321D-CCU-SL383 support standard SPI read/write commands like 03H/02H?
No - AT45DB321D-CCU-SL383 uses Atmel RapidS command set (e.g., E8H for continuous read, D2H for page read, 83H for buffer-to-flash program). It does not respond to generic SPI NOR opcodes. Host firmware must implement RapidS-specific instruction sequences, address formats, and dummy byte requirements per the datasheet.
How is the RDY/BUSY pin used during AT45DB321D-CCU-SL383 program/erase operations?
The RDY/BUSY pin on AT45DB321D-CCU-SL383 is an open-drain output pulled low during all self-timed operations - including page program, block erase, sector erase, chip erase, and page-to-buffer transfers. Host systems must monitor this pin (with external pull-up) to avoid issuing new commands until it returns high, ensuring reliable timing without fixed delays.
Can AT45DB321D-CCU-SL383 be used as direct EEPROM replacement?
Yes - AT45DB321D-CCU-SL383 supports EEPROM emulation via three-step read-modify-write using its dual buffers: read page → modify in buffer → program back with built-in erase. This avoids external RAM buffering and enables byte-level logical updates despite flash's page-erase constraint, making it suitable for parameter storage in legacy EEPROM-based designs.
What package variant does AT45DB321D-CCU-SL383 use, and is it RoHS compliant?
AT45DB321D-CCU-SL383 uses an 8-pin SOIC package (CCU suffix), measuring 3.9mm × 4.9mm with 1.27mm lead pitch. It is green, halide-free, and RoHS compliant (SL383 = lead-free, matte tin finish), meeting IPC/JEDEC J-STD-020 moisture sensitivity level 3 and qualified for industrial temperature operation.
AT45DB321D-CCU-SL383 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-TBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 528 Bytes x 8192 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 66 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-CBGA (6x8)
AT45DB321D-CCU-SL383 FAQ
1.How can I place an order for AT45DB321D-CCU-SL383 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DB321D-CCU-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 AT45DB321D-CCU-SL383 reliable?
The price and inventory of AT45DB321D-CCU-SL383 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DB321D-CCU-SL383 is usually 5 days.
3.What payment methods are accepted for AT45DB321D-CCU-SL383?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DB321D-CCU-SL383 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DB321D-CCU-SL383?
AT45DB321D-CCU-SL383 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DB321D-CCU-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 AT45DB321D-CCU-SL383?
For technical support, including AT45DB321D-CCU-SL383 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DB321D-CCU-SL383 requirements.
6.How does Aetrix verify that AT45DB321D-CCU-SL383 is sourced from the original manufacturer or authorized distributors?
All AT45DB321D-CCU-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 AT45DB321D-CCU-SL383 meets industry standards.
7.What is the process for return or replacement of AT45DB321D-CCU-SL383?
All AT45DB321D-CCU-SL383 units undergo pre-shipment inspection (PSI). If there is an issue with AT45DB321D-CCU-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 AT45DB321D-CCU-SL383 part is unused and in its original packaging.
Return procedure for AT45DB321D-CCU-SL383:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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