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Renesas AT45DQ321-CCUD-T
- Part No.:
- AT45DQ321-CCUD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 9-UBGA
- Datasheet:
-
AT45DQ321-CCUD-T.pdf
- Description:
- IC FLASH 32MBIT SPI 104MHZ 9UBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
AT45DQ321-CCUD-T from Renesas Electronics is a 32-Mbit SPI serial flash memory with 1-Mbit extra buffer space, supporting Dual-I/O and Quad-I/O read/write operations, 104 MHz SPI clock rate, 7 ns max clock-to-output time, and configurable 512/528-byte page size - deployed in industrial embedded systems for firmware storage and parameter logging.
For engineers reviewing the AT45DQ321-CCUD-T datasheet, AT45DQ321-CCUD-T pinout, AT45DQ321-CCUD-T application, or AT45DQ321-CCUD-T equivalent, key selection criteria include SPI mode 0/3 compatibility, RapidS™ high-speed operation, ultra-deep power-down (500 nA), sector lockdown security, and JEDEC-standard ID read capability.
Technical Context
The AT45DQ321-CCUD-T implements a dual-SRAM-buffer architecture (512/528 bytes each) enabling concurrent buffer write and main memory reprogramming. Its command set supports legacy and high-frequency read opcodes (03h, 0Bh, 1Bh, 6Bh) and quad-input buffer writes (EBh), with hardware/software reset and status register polling for operation control.
It features programmable page size (factory-configurable to 512 bytes), four erase granularities (page/4 kB block/64 kB sector/chip), and suspend/resume for program/erase - all managed via SPI commands without external address lines or parallel bus overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 Mbit main array + 1 Mbit extra buffer space - supports firmware image storage and runtime data logging in resource-constrained systems. |
| Supply voltage | 2.3 V to 3.6 V - enables direct interface with 2.5 V and 3.3 V microcontrollers without level-shifting. |
| Max SPI frequency | 104 MHz - reduces firmware update time and improves boot speed in real-time applications. |
| Quad-I/O read speed | 70 MHz - doubles data throughput vs standard SPI, critical for high-bandwidth configuration loading. |
| Page size | User-configurable 512 or 528 bytes - balances alignment efficiency with overhead for small-data updates. |
| Power-down current | 500 nA ultra-deep power-down - extends battery life in always-on IoT edge nodes. |
| Endurance | 100,000 program/erase cycles at -40 °C to +85 °C - ensures reliability over 10+ years in industrial control units. |
| Data retention | 20 years - meets long-term archival requirements for medical device calibration data and automotive ECU logs. |
Pinout & Package
AT45DQ321-CCUD-T uses an 8-pad Ultra-thin DFN package (5 × 6 × 0.6 mm), RoHS-compliant and optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be held low during full command sequence including address and data phases. |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports modes 0 and 3 with up to 104 MHz frequency. |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and data; supports single/dual/quad-input buffer writes (e.g., EBh opcode). |
| MISO | Master In Slave Out | Serial output for read data and status registers; supports single/dual/quad-output reads (e.g., 6Bh opcode). |
| WP | Write Protect | Hardware sector protection control; low = enables write/erase lock-down, high = allows software protection configuration. |
| HOLD | Pause Transfer | Halts ongoing SPI transfer without deselecting chip; enables multi-master arbitration or low-latency interrupt handling. |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling capacitor required within 10 mm of pin per datasheet layout guidelines. |
| GND | Ground | Reference for all I/O and internal circuitry; requires low-impedance connection to minimize noise coupling into SPI signals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SRAM buffers | Enables seamless background programming: receive new firmware into one buffer while erasing/rewriting main memory from the other. |
| RapidS™ high-speed operation | Reduces continuous array read latency by >30% vs legacy SPI mode, verified with 0Bh/1Bh opcodes and tV ≤ 7 ns. |
| Configurable page size | Factory-set to 528 bytes (default) or 512 bytes - eliminates padding waste in fixed-size packet protocols like CAN FD or Modbus TCP. |
| One-Time Programmable (OTP) security register | 128-byte register with 64-byte factory-unique ID and 64-byte user-programmable space - enables secure device binding and anti-cloning. |
| Program/Erase Suspend | Pauses active erase or program to service urgent read requests - essential for real-time telemetry buffering without data loss. |
| Individual sector lock-down | Permanently disables write/erase on selected sectors after freeze command - protects bootloader or calibration tables from accidental overwrite. |
Applications
| Industrial PLC Firmware Storage | Medical Device Calibration Logging |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in DIN-rail mounted programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Non-volatile firmware repository with rapid page rewrites and sector-level protection to prevent corruption during brown-out events. Use Value: 100,000-cycle endurance and 20-year data retention ensure firmware integrity across 15+ year product lifecycles without field replacement. | Use Scenario: Recording sensor calibration coefficients and usage history in portable ultrasound and infusion pump devices requiring FDA audit trails. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter log with OTP ID binding and sector lockdown for regulatory compliance. Use Value: 128-byte OTP register and permanent sector lock-down meet IEC 62304 traceability and data immutability requirements. |
| Automotive ADAS Bootloader Storage | Smart Meter Firmware & Tariff Table Updates |
Use Scenario: Holding secure bootloader images and signed firmware patches in camera-based driver-assistance modules exposed to -40 °C to +105 °C ambient. IC Role / Device Role / Timing Role: High-reliability boot memory with extended temperature rating and hardware reset support for fail-safe recovery. Use Value: Rated for -40 °C to +105 °C with 10,000 program/erase cycles ensures bootloader integrity over full automotive thermal lifecycle. | Use Scenario: Hosting meter firmware and time-of-use tariff tables updated remotely via RF or PLC communication in utility smart meters. IC Role / Device Role / Timing Role: Low-power, high-endurance serial flash enabling frequent over-the-air updates without compromising battery backup duration. Use Value: 500 nA ultra-deep power-down current extends 10-year lithium battery life while supporting quarterly firmware revisions. |
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 W25Q32JW | 32 Mbit, 1.65–3.6 V supply, no extra buffer memory, lacks RapidS™ and configurable page size. | Lower-cost option where buffer concurrency and legacy DataFlash compatibility are not required. | Select when system design does not rely on simultaneous buffer write/main memory rewrite or 512-byte page alignment. |
| Macronix MX25L3233F | 32 Mbit, 2.3–3.6 V, supports Dual/Quad I/O but no OTP security register or sector lock-down feature. | Preferred where high-speed Quad-I/O is needed but cryptographic binding and permanent sector protection are unnecessary. | Choose for cost-sensitive consumer electronics where security and long-term data integrity are secondary to throughput. |
Compared with W25Q32JW and MX25L3233F, the AT45DQ321-CCUD-T uniquely delivers concurrent buffer operation, factory-programmed OTP ID, and permanent sector lock-down - making it the only option meeting stringent industrial firmware update safety and regulatory traceability requirements.
Availability
AT45DQ321-CCUD-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, automotive ADAS modules, and smart utility meters requiring stable component supply and long-term lifecycle support.
Supply support for AT45DQ321-CCUD-T 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
Renesas Electronics is a global semiconductor leader delivering trusted microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The AT45DQ321-CCUD-T belongs to Renesas' DataFlash family, engineered specifically for robust, secure, and high-throughput serial code and data storage in mission-critical embedded systems.
FAQ
What is the default page size configuration for the AT45DQ321-CCUD-T?
The AT45DQ321-CCUD-T ships with a default page size of 528 bytes. This setting can be changed to 512 bytes via factory configuration or through the Buffer and Page Size Configuration command (see datasheet Section 12). The AT45DQ321-CCUD-T supports both sizes without hardware modification, enabling flexibility for legacy DataFlash migration or optimized packet-aligned writes.
Does the AT45DQ321-CCUD-T support SPI mode 3, and how is it enabled?
Yes, the AT45DQ321-CCUD-T fully supports SPI modes 0 and 3 as defined by CPOL and CPHA settings. No configuration is required - mode selection is determined solely by the host controller's SPI peripheral timing. The AT45DQ321-CCUD-T automatically adapts to either mode, and all command sequences (including RapidS™ opcodes) function identically in both configurations.
How does the AT45DQ321-CCUD-T achieve 500 nA ultra-deep power-down current?
The AT45DQ321-CCUD-T reaches 500 nA ultra-deep power-down current by disabling all internal clocks, isolating the memory array, and powering down charge pumps and regulators - activated via the Deep Power-Down command (B9h). The AT45DQ321-CCUD-T maintains state in non-volatile registers and resumes operation within 35 µs after resume command, preserving system responsiveness.
Can the AT45DQ321-CCUD-T be used as a direct replacement for older AT45DB series devices?
The AT45DQ321-CCUD-T is software-compatible with AT45DB321D but adds Dual/Quad-I/O, RapidS™, and enhanced security features. Pinout and voltage range match, but firmware must enable new opcodes (e.g., 6Bh for Quad-read) and configure page size if migrating from 528-byte-only DB variants. The AT45DQ321-CCUD-T is not drop-in compatible with AT45DB161D due to capacity and command differences.
What is the purpose of the 128-byte OTP security register in the AT45DQ321-CCUD-T?
The 128-byte OTP security register in the AT45DQ321-CCUD-T contains 64 bytes pre-programmed with a unique factory ID and 64 bytes user-programmable for keys, certificates, or device-specific metadata. Once written, OTP bytes cannot be erased - enabling secure device authentication, firmware binding, and anti-counterfeiting. The AT45DQ321-CCUD-T enforces write-protection after first programming, ensuring cryptographic integrity throughout the device lifetime.
AT45DQ321-CCUD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 9-UBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 8µs, 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:
- 9-UBGA (6x6)
AT45DQ321-CCUD-T FAQ
1.How can I place an order for AT45DQ321-CCUD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ321-CCUD-T 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 AT45DQ321-CCUD-T reliable?
The price and inventory of AT45DQ321-CCUD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DQ321-CCUD-T is usually 5 days.
3.What payment methods are accepted for AT45DQ321-CCUD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ321-CCUD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ321-CCUD-T?
AT45DQ321-CCUD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ321-CCUD-T 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 AT45DQ321-CCUD-T?
For technical support, including AT45DQ321-CCUD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ321-CCUD-T requirements.
6.How does Aetrix verify that AT45DQ321-CCUD-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ321-CCUD-T 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 AT45DQ321-CCUD-T meets industry standards.
7.What is the process for return or replacement of AT45DQ321-CCUD-T?
All AT45DQ321-CCUD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ321-CCUD-T, 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 AT45DQ321-CCUD-T part is unused and in its original packaging.
Return procedure for AT45DQ321-CCUD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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