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Renesas AT45DQ321-CCUF-T
- Part No.:
- AT45DQ321-CCUF-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 9-UBGA
- Datasheet:
-
AT45DQ321-CCUF-T.pdf
- Description:
- IC FLASH 32MBIT SPI 104MHZ 9UBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,116
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Product details
Overview
AT45DQ321-CCUF-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, and configurable 512/528-byte page size. It operates from 2.3 V to 3.6 V and targets firmware storage in industrial microcontroller systems requiring high-speed reprogramming and sector-level data protection.
For engineers reviewing the AT45DQ321-CCUF-T datasheet, AT45DQ321-CCUF-T pinout, AT45DQ321-CCUF-T application, or AT45DQ321-CCUF-T equivalent, key selection criteria include its ultra-deep power-down current (500 nA), dual SRAM buffers enabling concurrent read-while-write, JEDEC-standard ID support, and factory-configurable page size for legacy DataFlash compatibility.
Technical Context
The AT45DQ321-CCUF-T implements a two-buffer architecture with independent 512/528-byte SRAM buffers, allowing main memory reprogramming while receiving new data-critical for over-the-air firmware updates. Its command set supports RapidS™ mode for accelerated read throughput and includes dedicated opcodes for Dual-I/O (3Bh/BBh) and Quad-I/O (6Bh/EBh) transfers.
It features hardware- and software-controlled sector protection, a 128-byte OTP security register (64-byte factory UID + 64-byte user-programmable), and full erase granularity-from byte-aligned page (512/528 B) to chip-wide (32 Mbit). The device complies with industrial temperature range (–40 °C to +85 °C) and RoHS-compliant green packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 Mbit main array + 1 Mbit extra buffer space - enables separate firmware image staging and runtime parameter storage. |
| Supply voltage | 2.3 V to 3.6 V - supports direct interface with 2.5 V and 3.3 V logic domains without level shifting. |
| Max SPI clock | 104 MHz - reduces firmware read latency in boot-critical applications such as industrial PLCs. |
| Page size | User-configurable 512 or 528 bytes - maintains backward compatibility with legacy DataFlash systems while optimizing density. |
| Power-down current | 500 nA ultra-deep power-down - extends battery life in always-on edge sensors and metering devices. |
| Endurance | 100,000 program/erase cycles at –40 °C to +85 °C - ensures reliable field firmware updates over 10+ years of operation. |
| Data retention | 20 years - meets long-term archival requirements for medical and infrastructure equipment logs. |
Pinout & Package
AT45DQ321-CCUF-T uses an 8-pad Ultra-thin DFN package (5 mm × 6 mm × 0.6 mm), optimized for space-constrained industrial and portable designs. Pin assignments are defined per JEDEC MS-012AC and match standard SPI serial flash pinouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; supports multi-device daisy-chaining with proper timing hold. |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 104 MHz for high-throughput firmware loads. |
| MOSI | Master Out, Slave In | Serial input for commands, addresses, and write data; supports single/dual/quad-input modes via configuration. |
| MISO | Master In, Slave Out | Serial output for read data and status; enables quad-output reads (6Bh opcode) at up to 70 MHz effective bandwidth. |
| WP | Write Protect | Hardware lock for sector protection registers; asserts permanent read-only status when pulled low during power-up. |
| HOLD | Pause Transfer | Halts ongoing SPI transaction without deselecting CS; preserves internal state for low-latency interrupt servicing. |
| VCC | Power Supply | 2.3–3.6 V supply; decoupling required within 5 mm of pin to maintain signal integrity at 104 MHz. |
| GND | Ground | Reference return path; must be connected to solid ground plane to minimize noise in high-speed read operations. |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O support | Enables 2× or 4× read bandwidth vs. standard SPI - cuts firmware load time by up to 75% in boot sequences. |
| Two independent SRAM buffers | Allows simultaneous buffer write and main memory page program - eliminates CPU idle time during firmware patching. |
| Program/Erase suspend/resume | Permits urgent real-time tasks to preempt flash operations - essential for deterministic response in motor control systems. |
| 128-byte OTP security register | Stores immutable device identity and user keys - satisfies secure boot root-of-trust requirements in IIoT gateways. |
| Individual sector lockdown | Makes protected sectors permanently read-only after programming - prevents accidental or malicious overwrite of bootloader code. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Logging |
|---|---|
Use Scenario: Storing and updating ladder logic firmware images in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Non-volatile firmware repository with rapid page rewrites and hardware write-protection for safety-critical boot code. Use Value: Dual-buffer operation enables zero-downtime firmware upgrades; 100,000-cycle endurance supports >5 daily updates over 50 years. |
Use Scenario: Recording calibration parameters, usage counters, and audit trails in Class II medical infusion pumps operating under FDA 21 CFR Part 11. IC Role / Device Role / Timing Role: Secure, tamper-resistant log storage with OTP UID binding and sector lockdown for regulatory compliance. Use Value: 128-byte OTP register provides cryptographically verifiable device identity; 20-year data retention meets medical record archiving mandates. |
| Smart Meter Firmware & Tariff Tables | Automotive Telematics Bootloader Storage |
Use Scenario: Hosting firmware, tariff schedules, and cryptographic keys in ANSI C12.22-compliant electricity meters exposed to wide temperature swings. IC Role / Device Role / Timing Role: Industrial-grade serial flash with –40 °C to +85 °C operation and ultra-deep power-down for battery-backed operation. Use Value: 500 nA deep power-down current extends 10-year battery life; sector protection prevents unauthorized tariff modification. |
Use Scenario: Storing signed bootloader images and secure boot certificates in automotive telematics control units (TCUs) requiring AEC-Q100 Grade 2 qualification. IC Role / Device Role / Timing Role: Trusted firmware storage with hardware-based write protection and rapid verification via Quad-I/O reads. Use Value: Quad-output read at 70 MHz accelerates secure boot validation; individual sector lockdown isolates bootloader from application partitions. |
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, 1.8 V supply, no dual/quad buffer architecture; lacks SRAM buffers and RapidS™ acceleration. | Lower power but no concurrent read-while-write; requires external buffering for OTA update pipelines. | Select when 1.8 V operation is mandatory and firmware update concurrency is not required. |
| Macronix MX25L3233F | 32 Mbit, 2.7–3.6 V supply, supports Quad-I/O only (no Dual-I/O); no OTP security register or sector lockdown. | Lacks hardware-enforced read-only sectors and unique device ID - insufficient for regulated medical or secure boot use cases. | Select for cost-sensitive industrial HMI where security and ultra-low power are secondary. |
Compared with W25Q32JW and MX25L3233F, the AT45DQ321-CCUF-T uniquely combines dual SRAM buffers, 500 nA ultra-deep power-down, and factory-programmed UID in a single 5×6 mm DFN package - making it optimal for secure, low-power, high-reliability embedded firmware storage.
Availability
AT45DQ321-CCUF-T is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, smart electricity meters, and automotive telematics units requiring stable component supply across extended product lifecycles.
Supply support for AT45DQ321-CCUF-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The AT45DQ321-CCUF-T belongs to Renesas' DataFlash family, designed specifically for high-reliability embedded systems needing fast, secure, and flexible non-volatile storage with robust data integrity features.
FAQ
What is the operating voltage range for the AT45DQ321-CCUF-T?
The AT45DQ321-CCUF-T operates from 2.3 V to 3.6 V, enabling direct integration with 2.5 V and 3.3 V system rails without level-shifting circuitry. This range is validated across the full industrial temperature range (–40 °C to +85 °C), and the AT45DQ321-CCUF-T maintains specified AC timing and endurance within these limits.
Does the AT45DQ321-CCUF-T support true concurrent read-while-write?
Yes - the AT45DQ321-CCUF-T integrates two fully independent 512/528-byte SRAM buffers. While one buffer receives new data via SPI, the other can simultaneously program a page into main memory. This capability is intrinsic to the AT45DQ321-CCUF-T architecture and does not require external arbitration or timing coordination.
How is the page size configured on the AT45DQ321-CCUF-T?
The AT45DQ321-CCUF-T supports 512-byte or 528-byte pages via factory configuration - not runtime reconfiguration. The default is 528 bytes (standard DataFlash format), but Renesas can pre-set the device to 512-byte mode during manufacturing. This setting is fixed per unit and cannot be changed in the field. The AT45DQ321-CCUF-T datasheet confirms this in Section 12.
What security features does the AT45DQ321-CCUF-T provide beyond basic write protection?
The AT45DQ321-CCUF-T includes a 128-byte OTP security register (64-byte factory UID + 64-byte user area), hardware-enforced sector lockdown (making protected sectors permanently read-only), and software/hardware sector protection registers. These features are implemented in silicon and do not rely on external controllers - a core differentiator of the AT45DQ321-CCUF-T versus generic SPI flash.
Is the AT45DQ321-CCUF-T pin-compatible with earlier AT45DB series devices?
No - the AT45DQ321-CCUF-T is not pin-compatible with AT45DB series devices. While both share SPI interface fundamentals, the AT45DQ321-CCUF-T introduces new command opcodes (e.g., 6Bh for Quad-output Read), revised status register layout, and enhanced protection logic. PCB layout reuse requires verification against the AT45DQ321-CCUF-T pinout in Figure 1 and Table 1 of the datasheet.
AT45DQ321-CCUF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 9-UBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-UBGA (6x6)
AT45DQ321-CCUF-T FAQ
1.How can I place an order for AT45DQ321-CCUF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ321-CCUF-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-CCUF-T reliable?
The price and inventory of AT45DQ321-CCUF-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-CCUF-T is usually 5 days.
3.What payment methods are accepted for AT45DQ321-CCUF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ321-CCUF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ321-CCUF-T?
AT45DQ321-CCUF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ321-CCUF-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-CCUF-T?
For technical support, including AT45DQ321-CCUF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ321-CCUF-T requirements.
6.How does Aetrix verify that AT45DQ321-CCUF-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ321-CCUF-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-CCUF-T meets industry standards.
7.What is the process for return or replacement of AT45DQ321-CCUF-T?
All AT45DQ321-CCUF-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ321-CCUF-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-CCUF-T part is unused and in its original packaging.
Return procedure for AT45DQ321-CCUF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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