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Renesas AT45DQ321-MWHF-Y
- Part No.:
- AT45DQ321-MWHF-Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DQ321-MWHF-Y.pdf
- Description:
- IC FLASH 32MBIT SPI 104MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,723
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Product details
Overview
AT45DQ321-MWHF-Y 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 clock-to-output time, and configurable 512/528-byte page size - deployed in industrial embedded systems for firmware storage and real-time data logging.
For engineers reviewing the AT45DQ321-MWHF-Y datasheet, AT45DQ321-MWHF-Y pinout, AT45DQ321-MWHF-Y application, or AT45DQ321-MWHF-Y equivalent, key selection criteria include quad-mode throughput, ultra-deep power-down current (500 nA), sector lockdown security, RapidS™ timing compliance, and industrial temperature support (–40 °C to +105 °C).
Technical Context
The AT45DQ321-MWHF-Y implements a dual-SRAM-buffer architecture (512/528 bytes each), enabling concurrent buffer write and main memory reprogramming. Its command set supports legacy SPI modes 0/3 and high-speed RapidS™ operation with dedicated opcodes for Dual-input/Quad-input Buffer Write and Dual-output/Quad-output Read.
Memory organization includes page (512/528 B), block (4 kB), sector (64 kB), and chip-level erase options, plus hardware/software sector protection, 128-byte OTP security register (64 B factory-unique ID + 64 B user-programmable), and configurable Quad Enable via status register bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 32 Mbit main array + 1 Mbit extra buffer space - supports firmware image storage and runtime parameter logging in constrained-footprint designs. |
| Supply voltage | 2.3 V to 3.6 V - enables direct interface with 2.5 V/3.3 V microcontrollers without level-shifting. |
| Max SPI frequency | 104 MHz - delivers up to 13 MB/s sequential read throughput in standard SPI mode. |
| Dual/Quad-I/O speed | 70 MHz - achieves up to 35 MB/s (Dual) or 70 MB/s (Quad) effective bandwidth for high-speed boot code loading. |
| Page size | User-configurable 512 or 528 bytes - aligns with common MCU bootloader sectors and simplifies wear leveling implementation. |
| Power-down current | 500 nA ultra-deep power-down - extends battery life in always-on sensor nodes and IoT edge devices. |
| Endurance & retention | 100,000 cycles at –40 °C to +85 °C; 20-year data retention - validated for mission-critical industrial control firmware storage. |
Pinout & Package
AT45DQ321-MWHF-Y uses an 8-pad Very-thin DFN package (6 mm × 8 mm × 1.0 mm), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCK edge to initiate valid transaction. |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 104 MHz with 7 ns tV (clock-to-output). |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and data; supports single/Dual/Quad-input modes per configuration register. |
| MISO | Master In Slave Out | Serial output for read data and status; operates in single/Dual/Quad-output modes depending on QUADEN bit setting. |
| WP | Write Protect | Hardware sector lock control; low = enables software protection; high = freezes sector lockdown state permanently. |
| RESET | Hardware Reset | Active-low asynchronous reset; returns device to power-on state and clears internal status registers. |
| HOLD | Hold Input | Pauses ongoing SPI transfer without deselecting CS; maintains internal address pointer during multi-command sequences. |
| VSS | Ground | Reference return path for all I/O and core logic; requires low-impedance connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SRAM buffers | Enables background programming: receive new data into one buffer while erasing/programming main memory from the other - eliminates write latency stalls in real-time systems. |
| RapidS™ high-speed timing | Reduces setup/hold times vs. standard SPI, allowing reliable 104 MHz operation without external timing margining or custom PCB trace tuning. |
| Configurable Quad Enable | Bit in status register controls MISO/MOSI dual-role assignment for Quad-I/O; avoids permanent hardware dependency on fixed pin mapping. |
| 128-byte OTP security register | Provides immutable device identity (64 B factory-assigned UID) and secure key storage (64 B user-writable) - meets basic secure boot root-of-trust requirements. |
| Program/Erase suspend/resume | Allows interrupting long erase operations (e.g., sector/sector) to service urgent read requests - critical for deterministic response in safety-critical firmware updates. |
Applications
| Industrial PLC Firmware Storage | Medical Device Data Logger |
|---|---|
Use Scenario: Storing and updating programmable logic controller firmware images in field-deployed automation cabinets exposed to wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile firmware repository with fast Quad-I/O read for cold-boot execution and buffer-to-memory program for safe over-the-air updates. Use Value: 100,000-cycle endurance and –40 °C to +105 °C operation ensure reliable firmware persistence across 15+ years of unattended operation. | Use Scenario: Capturing timestamped physiological sensor readings (ECG, SpO₂) in portable diagnostic equipment with limited battery capacity. IC Role / Device Role / Timing Role: Low-power data sink using ultra-deep power-down (500 nA) between sampling intervals and rapid buffer write for burst acquisition. Use Value: Concurrent buffer write + main memory programming allows continuous data capture without gaps during flash page rewrites. |
| Automotive ADAS Boot Memory | Smart Grid Meter Firmware Vault |
Use Scenario: Hosting boot code and calibration tables for radar processing units requiring AEC-Q100 Grade 2 compliance and secure firmware integrity. IC Role / Device Role / Timing Role: Secure boot loader storage with sector lockdown and OTP UID to prevent unauthorized firmware replacement. Use Value: Hardware WP pin + software sector protection register enables tamper-resistant partitioning of boot vs. application code regions. | Use Scenario: Storing firmware, tariff tables, and cryptographic keys in utility smart meters operating in outdoor enclosures with extended thermal cycling. IC Role / Device Role / Timing Role: Long-life firmware archive with 20-year data retention and 64 kB sector erase for modular firmware upgrades. Use Value: Sector erase granularity minimizes update window duration and reduces risk of corruption during power interruption. |
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, Quad SPI only (no Dual-I/O), 133 MHz max clock, no OTP security register. | Lacks hardware WP-controlled sector lockdown and 128-byte OTP; requires external authentication for secure boot. | Preferred when maximum read speed is prioritized over security features and industrial temp range is not required. |
| Macronix MX25L3233F | 32 Mbit, 2.7–3.6 V supply, supports Dual/Quad SPI, 104 MHz max clock, no ultra-deep power-down (min 1 µA), no OTP register. | Higher minimum VCC excludes 2.5 V systems; lacks 500 nA power-down mode and factory UID for device identity. | Selected for cost-sensitive industrial controllers where 2.3 V operation and sub-µA sleep current are non-critical. |
Compared with W25Q32JW and MX25L3233F, the AT45DQ321-MWHF-Y uniquely combines 2.3 V operation, 500 nA ultra-deep power-down, factory-programmed UID, and hardware-enforced sector lockdown - making it the only option qualified for secure, ultra-low-power, wide-temperature firmware storage in certified medical and automotive edge devices.
Availability
AT45DQ321-MWHF-Y is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device data logging, automotive ADAS boot memory, and smart grid meter firmware vault applications requiring stable component supply across extended product lifecycles.
Supply support for AT45DQ321-MWHF-Y 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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The AT45DQ321 belongs to Renesas' DataFlash® family, engineered specifically for high-reliability embedded systems requiring simultaneous read/write capability, robust data security, and extended temperature operation without external buffering.
FAQ
What is the operating temperature range supported by the AT45DQ321-MWHF-Y?
The AT45DQ321-MWHF-Y is rated for the full industrial temperature range of –40 °C to +105 °C, validated per JEDEC standards. This specification applies to all electrical parameters including 100,000 program/erase cycles and 20-year data retention. The -Y suffix explicitly denotes the +105 °C grade, distinguishing it from the standard +85 °C variant.
Does the AT45DQ321-MWHF-Y support Quad SPI mode out of the box?
No - Quad SPI mode must be enabled via the QUADEN bit (bit 6) in the status register using the Write Status Register command (01h). The AT45DQ321-MWHF-Y powers up in standard SPI mode; Dual/Quad-I/O functionality is software-configurable and persistent across power cycles once set.
How does the dual-SRAM buffer architecture improve system responsiveness in the AT45DQ321-MWHF-Y?
The AT45DQ321-MWHF-Y's two independent 512/528-byte SRAM buffers allow simultaneous operations: while one buffer receives incoming data via MOSI, the other can execute Buffer-to-Main-Memory Page Program. This overlap eliminates write latency bottlenecks, enabling uninterrupted data streaming in real-time logging and firmware update scenarios.
Can the AT45DQ321-MWHF-Y be used as a direct replacement for legacy AT45DB321 devices?
No - although both are 32-Mbit DataFlash devices, the AT45DQ321-MWHF-Y introduces Quad-I/O support, RapidS™ timing, updated command opcodes (e.g., 6Bh for Quad-output Read), and revised status register layout. Migration requires firmware command set revision and timing validation; it is not a drop-in replacement.
What security mechanisms are implemented in the AT45DQ321-MWHF-Y to protect firmware integrity?
The AT45DQ321-MWHF-Y provides three layered protections: (1) hardware WP pin control of sector lockdown, (2) software-configurable sector protection register (32 sectors), and (3) 128-byte OTP security register with 64-byte factory UID and 64-byte user-programmable space - collectively enabling secure boot, firmware version binding, and anti-cloning measures.
AT45DQ321-MWHF-Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 8-VDFN (6x8)
AT45DQ321-MWHF-Y FAQ
1.How can I place an order for AT45DQ321-MWHF-Y through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ321-MWHF-Y 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-MWHF-Y reliable?
The price and inventory of AT45DQ321-MWHF-Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT45DQ321-MWHF-Y is usually 5 days.
3.What payment methods are accepted for AT45DQ321-MWHF-Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ321-MWHF-Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ321-MWHF-Y?
AT45DQ321-MWHF-Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ321-MWHF-Y 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-MWHF-Y?
For technical support, including AT45DQ321-MWHF-Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ321-MWHF-Y requirements.
6.How does Aetrix verify that AT45DQ321-MWHF-Y is sourced from the original manufacturer or authorized distributors?
All AT45DQ321-MWHF-Y 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-MWHF-Y meets industry standards.
7.What is the process for return or replacement of AT45DQ321-MWHF-Y?
All AT45DQ321-MWHF-Y units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ321-MWHF-Y, 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-MWHF-Y part is unused and in its original packaging.
Return procedure for AT45DQ321-MWHF-Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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