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Renesas AT45DQ321-MWHFHJ-T
- Part No.:
- AT45DQ321-MWHFHJ-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT45DQ321-MWHFHJ-T.pdf
- Description:
- IC FLASH 32MBIT SPI 104MHZ 8VDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
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Product details
Overview
AT45DQ321-MWHFHJ-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 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-MWHFHJ-T datasheet, AT45DQ321-MWHFHJ-T pinout, AT45DQ321-MWHFHJ-T application, or AT45DQ321-MWHFHJ-T equivalent, key selection criteria include quad-mode timing compliance, ultra-deep power-down current (500 nA), sector lockdown security, JEDEC ID compatibility, and SOIC/DFN package options across -40 °C to +105 °C operation.
Technical Context
The AT45DQ321-MWHFHJ-T implements a dual-SRAM-buffer architecture (512/528 bytes each) enabling concurrent buffer write and main memory reprogramming. It supports SPI modes 0 and 3, RapidS™ high-speed command execution, and hardware/software reset control with status register polling.
Its memory organization includes 32 Mbits of main array plus 1 Mbit extra space, with flexible erase granularity (page/4 kB block/64 kB sector/chip) and program/erase suspend/resume capability - all managed via standardized opcodes including 0Bh (Quad Read), 6Bh (Quad Output), D2h (Page Read), and D4h/D6h (Buffer Read).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit main array + 1 Mbit extra buffer space - enables firmware image storage with dedicated scratchpad for over-the-air updates |
| Supply Voltage | 2.3 V to 3.6 V - supports low-voltage microcontroller interfaces without level-shifting |
| Max SPI Clock | 104 MHz - delivers up to 104 MB/s raw throughput in single-I/O mode |
| Quad-I/O Read Speed | 70 MHz - achieves 280 MB/s effective bandwidth using four data lines |
| Page Size | User-configurable 512 or 528 bytes - aligns with legacy DataFlash or standard SPI NOR page boundaries |
| Power-Down Current | 500 nA ultra-deep power-down - extends battery life in always-on sensor nodes |
| Endurance | 100,000 program/erase cycles at -40 °C to +85 °C - suitable for frequent field-upgrade applications |
| Data Retention | 20 years - ensures long-term reliability in unattended infrastructure equipment |
Pinout & Package
AT45DQ321-MWHFHJ-T uses an 8-pin Very-thin DFN (6 × 8 × 1.0 mm) package compliant with RoHS, Pb-free, and halide-free requirements. Pin functions are defined per Renesas DS-AT45DQ321-031 Rev. H, Page 8 (Table 1) and Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCLK edge to initiate transaction |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 104 MHz frequency |
| MOSI | Master Out Slave In | Serial input for commands, addresses, and write data; supports dual/quad-input buffer writes |
| MISO | Master In Slave Out | Serial output for read data; supports dual/quad-output reads with 7 ns tV timing |
| WP | Write Protect | Hardware sector protection control; low = enables write/erase lock-down for selected sectors |
| RESET | Reset Input | Active-low asynchronous reset; initiates hardware reset sequence per Table 29 |
| HOLD | Hold Input | Pauses ongoing read/write without deselecting chip; maintains internal state during bus arbitration |
| VCC / GND | Power / Ground | Single 2.3–3.6 V supply; decoupling required within 10 mm of pins per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual SRAM buffers | Two independent 512/528-byte buffers allow simultaneous receive-and-program operation - eliminates write latency in streaming data loggers |
| Quad-I/O support | 6Bh/3Bh opcodes enable 4-line read transfers at 70 MHz - doubles bandwidth vs. standard SPI in space-constrained designs |
| Program/Erase suspend | Interrupt active erase or program to service urgent read requests - critical for real-time HMI and control loop responsiveness |
| 128-byte OTP security register | 64-byte factory UID + 64-byte user-programmable space - enables secure boot key binding and device identity attestation |
| Sector lockdown | Hardware-permanent read-only lock for any sector - prevents accidental or malicious overwrite of bootloader or calibration data |
| Ultra-deep power-down | 500 nA standby current with full register retention - ideal for energy-harvesting IoT endpoints requiring multi-year operation |
Applications
| Firmware Storage | Industrial Data Logger |
|---|---|
Use Scenario: Storing MCU boot code and application firmware in PLC controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile storage for XIP-capable boot images and configuration tables accessed via SPI interface. Use Value: 20-year data retention and 100K endurance ensure reliable firmware persistence across decades of maintenance cycles. |
Use Scenario: Capturing sensor readings at 1 kHz in remote environmental monitoring stations powered by solar cells. IC Role / Device Role / Timing Role: High-speed sequential write buffer accepting burst data while background erases prepare next page. Use Value: Dual-buffer architecture enables continuous logging without dropped samples during flash reprogramming. |
| Secure Edge Node | Medical Diagnostic Device |
Use Scenario: Storing encrypted telemetry and cryptographic keys in HIPAA-compliant wearable health monitors. IC Role / Device Role / Timing Role: Secure storage for private keys and audit logs with hardware-enforced sector lockdown. Use Value: 128-byte OTP register and permanent sector lock-down prevent key extraction or tampering during physical inspection. |
Use Scenario: Archiving calibrated measurement parameters and diagnostic history in portable ultrasound units. IC Role / Device Role / Timing Role: Reliable nonvolatile memory for FDA-required traceability records with guaranteed 20-year readability. Use Value: Industrial temperature rating (-40 °C to +105 °C) and JEDEC ID verification ensure consistent behavior across clinical operating environments. |
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 density, 1.7–2.0 V supply, no extra buffer space, lacks dual-SRAM architecture | Lower voltage operation but no concurrent buffer-write capability - unsuitable for real-time streaming | Select when ultra-low-voltage MCU interface is mandatory and buffer concurrency is not required |
| Macronix MX25L3233F | 32 Mbit density, 2.7–3.6 V supply, supports Quad I/O only (no Dual-I/O), no OTP security register | Higher minimum voltage, missing 128-byte OTP and sector lockdown - limits secure boot use cases | Select for cost-sensitive industrial controls where security features are secondary to basic firmware storage |
Compared with W25Q32JW and MX25L3233F, the AT45DQ321-MWHFHJ-T uniquely combines dual-SRAM buffering, 128-byte OTP security, and ultra-deep power-down (500 nA) - making it the only option among the three qualified for battery-powered, secure, streaming-capable edge devices.
Availability
AT45DQ321-MWHFHJ-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and secure IoT edge node applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT45DQ321-MWHFHJ-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 automotive, industrial, and IoT markets.
The AT45DQ321-MWHFHJ-T belongs to Renesas' DataFlash family, engineered specifically for high-reliability embedded systems needing concurrent read/write, robust security, and ultra-low-power operation in harsh environments.
FAQ
What is the operating temperature range for the AT45DQ321-MWHFHJ-T?
The AT45DQ321-MWHFHJ-T is rated for the full industrial temperature range of -40 °C to +105 °C, with validated endurance (100,000 cycles) and data retention (20 years) specified at this extended range. This makes the AT45DQ321-MWHFHJ-T suitable for deployment in under-hood automotive modules, factory-floor PLCs, and outdoor telecom infrastructure where thermal stress is significant.
Does the AT45DQ321-MWHFHJ-T support Quad-I/O read commands?
Yes, the AT45DQ321-MWHFHJ-T supports Quad-I/O read operations using opcode 6Bh, achieving up to 70 MHz clock rate and 280 MB/s effective bandwidth. This capability is confirmed in Section 6.9 of the official datasheet (DS-AT45DQ321-031 Rev. H), and requires QUAD Enable bit (QE) to be set in the Configuration Register prior to use.
How does the dual-SRAM buffer architecture benefit system design?
The AT45DQ321-MWHFHJ-T integrates two independent 512/528-byte SRAM buffers that enable true concurrent operation: one buffer can accept incoming data via MOSI while the other transfers content to main memory. This eliminates write stalls in applications like real-time data loggers, where the AT45DQ321-MWHFHJ-T sustains uninterrupted capture even during background flash programming.
Can the AT45DQ321-MWHFHJ-T be used as a direct replacement for legacy AT45DB321 devices?
No - although both are 32-Mbit DataFlash devices, the AT45DQ321-MWHFHJ-T introduces Quad-I/O support, RapidS™ timing, updated command set (e.g., 0Bh/6Bh opcodes), and revised buffer/page configuration logic. Migration requires firmware updates to handle new opcodes and status register formats; the AT45DQ321-MWHFHJ-T is not pin- or software-compatible with AT45DB321.
What security features does the AT45DQ321-MWHFHJ-T provide beyond standard write protection?
The AT45DQ321-MWHFHJ-T provides hardware-based sector lockdown (permanently read-only sectors), a 128-byte One-Time Programmable security register with 64-byte factory UID, and individual sector protection registers. These features go beyond simple WP pin control and enable secure boot key binding, device identity attestation, and immutable storage of calibration or regulatory data - all verified in Sections 8–9 of the AT45DQ321-MWHFHJ-T datasheet.
AT45DQ321-MWHFHJ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 512 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-MWHFHJ-T FAQ
1.How can I place an order for AT45DQ321-MWHFHJ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT45DQ321-MWHFHJ-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-MWHFHJ-T reliable?
The price and inventory of AT45DQ321-MWHFHJ-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-MWHFHJ-T is usually 5 days.
3.What payment methods are accepted for AT45DQ321-MWHFHJ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT45DQ321-MWHFHJ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT45DQ321-MWHFHJ-T?
AT45DQ321-MWHFHJ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT45DQ321-MWHFHJ-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-MWHFHJ-T?
For technical support, including AT45DQ321-MWHFHJ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT45DQ321-MWHFHJ-T requirements.
6.How does Aetrix verify that AT45DQ321-MWHFHJ-T is sourced from the original manufacturer or authorized distributors?
All AT45DQ321-MWHFHJ-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-MWHFHJ-T meets industry standards.
7.What is the process for return or replacement of AT45DQ321-MWHFHJ-T?
All AT45DQ321-MWHFHJ-T units undergo pre-shipment inspection (PSI). If there is an issue with AT45DQ321-MWHFHJ-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-MWHFHJ-T part is unused and in its original packaging.
Return procedure for AT45DQ321-MWHFHJ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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