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Renesas AT25FF321A-MHN-T
- Part No.:
- AT25FF321A-MHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25FF321A-MHN-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,115
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Product details
Overview
AT25FF321A-MHN-T from Renesas Electronics is a 32-Mbit SPI serial flash memory supporting 1.65 V–3.6 V operation, quad I/O (1-4-4), XiP mode, and 133 MHz max clock frequency. It delivers 4-kByte/32-kByte/64-kByte block erase, 100,000 program/erase cycles, and ultra-low 5–7 nA deep power-down current. It serves as non-volatile program storage or direct code execution in resource-constrained embedded systems.
For engineers reviewing the AT25FF321A-MHN-T datasheet, AT25FF321A-MHN-T pinout, AT25FF321A-MHN-T application, or AT25FF321A-MHN-T equivalent, key selection criteria include multi-I/O read bandwidth, XiP support for reduced RAM footprint, flexible memory protection schemes, and ultra-deep power-down capability for battery-powered IoT endpoints.
Technical Context
The AT25FF321A-MHN-T implements a dual-mode SPI interface with hardware-selectable standard (1-1-1), dual-output (1-1-2), quad-output (1-1-4), and full quad I/O (1-4-4, 0-4-4) protocols. Its internal architecture integrates a 256-byte SRAM buffer and supports continuous burst reads without repeated command opcodes in XiP mode.
Memory protection is implemented via individual block lock bits, global lock/unlock commands, and user-definable protected regions at either memory array boundary. OTP security registers (3 × 128 bytes) and factory-programmed UID enable secure boot and device authentication in certified firmware deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB) - sufficient for firmware images, configuration data, and asset storage in compact edge devices. |
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Max Clock Frequency | 133 MHz (quad I/O) - achieves up to 66.5 MB/s effective read throughput in 1-4-4 mode. |
| Erase Granularity | 4-kByte / 32-kByte / 64-kByte blocks + full chip - allows fine-grained firmware updates without erasing entire memory space. |
| Power Consumption | 5–7 nA ultra-deep power-down - extends battery life in always-on sensor nodes with infrequent wake-up intervals. |
| Data Retention | 20 years - ensures long-term reliability for industrial control firmware and medical device logs. |
| Endurance | 100,000 program/erase cycles - supports frequent over-the-air (OTA) firmware updates across product lifetime. |
Pinout & Package
AT25FF321A-MHN-T is packaged in an 8-pad USON (3 mm × 4 mm × 0.55 mm) with wettable flank leads, optimized for automated optical inspection (AOI) and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate any command sequence and low-to-high to terminate operations. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output - defines timing for all SPI transfers. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; reconfigured as bidirectional I/O0 during dual/quad I/O reads for parallel data transfer. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Default data output; becomes I/O1 in multi-I/O modes to deliver two or four bits per SCK falling edge. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write protection when held low; functions as I/O2 in quad I/O modes to expand data bus width. |
| HOLD/RESET (I/O3) | Hold or Hardware Reset | Pauses ongoing transfers when asserted low; also serves as JEDEC-standard reset input to force device initialization. |
| VCC | Power Supply | Single 1.65–3.6 V supply - powers core logic, memory array, and I/O drivers; no auxiliary voltage required. |
| GND | Ground Reference | Common return path for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| eXecute-in-Place (XiP) support | Enables direct CPU instruction fetch from flash via 0-4-4 command format, eliminating RAM copy overhead and reducing BOM cost. |
| Quad I/O (1-4-4, 0-4-4) | Doubles read bandwidth vs. standard SPI by using all four I/O pins for address and data, critical for real-time firmware execution. |
| Ultra-deep power-down (79h) | Reduces quiescent current to 5–7 nA - ideal for energy-harvesting sensors requiring multi-year battery life. |
| OTP security registers (3 × 128 B) | Provides immutable storage for cryptographic keys, device certificates, and secure boot manifests to prevent firmware tampering. |
| Flexible memory protection | Supports per-block locking, start/end region protection, and volatile/non-volatile status register control - essential for safe OTA updates. |
Applications
| Industrial PLC Firmware Storage | Wearable Health Monitor Data Logging |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in compact programmable logic controllers with limited PCB area. IC Role / Device Role / Timing Role: Non-volatile program memory with XiP capability, enabling deterministic boot and real-time instruction fetch without external RAM. Use Value: Eliminates need for external SRAM, reduces system power by 12–18 mW during active execution, and supports field firmware upgrades via 4-kByte block erase. | Use Scenario: Capturing and retaining ECG waveform snapshots and calibration parameters in battery-powered wearable patches. IC Role / Device Role / Timing Role: Low-power persistent data logger with ultra-deep power-down mode activated between sensor sampling intervals. Use Value: Extends coin-cell battery life to >3 years by drawing only 5–7 nA during 99.9% of operational time, while retaining full 20-year data integrity. |
| Smart Home Hub Boot Memory | Automotive Telematics OTA Storage |
Use Scenario: Hosting bootloader and Linux kernel image in Wi-Fi/BLE-enabled home automation hubs with thermal constraints. IC Role / Device Role / Timing Role: High-speed boot memory supporting 133 MHz quad I/O reads to load kernel within <120 ms after power-on reset. Use Value: Meets stringent boot-time SLAs with 66.5 MB/s read throughput and eliminates thermal throttling risk via 8.3 mA active read current. | Use Scenario: Secure storage of signed firmware update packages and rollback prevention metadata in vehicle telematics control units. IC Role / Device Role / Timing Role: Trusted execution environment anchor with OTP registers storing root-of-trust keys and verified firmware hashes. Use Value: Enables A/B firmware partitioning with atomic 64-kByte block erase and cryptographic verification before each boot, satisfying UNECE R155 compliance. |
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, 1.7–2.0 V / 2.7–3.6 V dual supply range; supports octal DTR mode up to 200 MHz; no native XiP continuous read mode. | Better suited for high-throughput data streaming but lacks seamless XiP execution flow; requires additional command overhead per read burst. | Select W25Q32JW if system uses octal-capable host controller and prioritizes peak bandwidth over deterministic boot latency. |
| Micron MT25QL32ABA | 32 Mbit, 2.7–3.6 V only; supports SFDP v1.6 and 4-byte addressing; includes hardware reset but no ultra-deep power-down mode (min 25 µA DPD). | Designed for industrial temperature range (–40°C to +105°C); lacks sub-10 nA power state needed for ultra-low-energy sensing. | Choose MT25QL32ABA for extended temperature operation where ultra-low sleep current is not required. |
Compared with W25Q32JW and MT25QL32ABA, the AT25FF321A-MHN-T uniquely combines single-supply 1.65–3.6 V operation, true XiP continuous read, and 5–7 nA ultra-deep power-down - making it optimal for battery-constrained, boot-critical embedded systems requiring both performance and energy efficiency.
Availability
AT25FF321A-MHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, wearable health monitor data logging, smart home hub boot memory, and automotive telematics OTA storage requiring stable component supply across multi-year production cycles.
Supply support for AT25FF321A-MHN-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 microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25FF321A belongs to Renesas' high-performance serial flash memory product line, engineered specifically for embedded systems demanding low-voltage operation, ultra-low power states, and robust security features including OTP registers and XiP execution.
FAQ
What is the operating voltage range supported by the AT25FF321A-MHN-T?
The AT25FF321A-MHN-T operates across a single supply voltage range of 1.65 V to 3.6 V. This wide range allows direct integration with 1.8 V, 2.5 V, and 3.3 V host systems without level-shifting circuitry. The specification is validated across the full industrial temperature range (–40°C to +85°C), and all timing and functional parameters-including 133 MHz quad I/O operation and ultra-deep power-down-are guaranteed within this voltage window. AT25FF321A-MHN-T does not require auxiliary supplies or voltage regulators.
Does the AT25FF321A-MHN-T support execute-in-place (XiP) functionality?
Yes, the AT25FF321A-MHN-T fully supports eXecute-in-Place (XiP) via its 0-4-4 command format, which enables continuous burst reads without repeating the command opcode. This eliminates instruction fetch latency associated with standard SPI reads and allows microcontrollers to execute code directly from flash memory. The AT25FF321A-MHN-T's internal architecture-featuring a 256-byte SRAM buffer and optimized quad I/O path-ensures deterministic timing for XiP, making it suitable for real-time embedded applications where RAM footprint reduction is critical. AT25FF321A-MHN-T implements this without external hardware assistance.
What package type is used for the AT25FF321A-MHN-T?
The AT25FF321A-MHN-T is supplied in an 8-pad Ultra-thin Small Outline No-lead (USON) package measuring 3 mm × 4 mm × 0.55 mm. This package features wettable flank leads for reliable automated optical inspection (AOI) and solder joint quality verification. It is RoHS-compliant, halogen-free, and qualified for reflow soldering per J-STD-020. The pinout matches industry-standard 8-pin serial flash layouts, simplifying board design reuse. AT25FF321A-MHN-T's USON footprint occupies 40% less area than comparable 8-lead SOIC variants while maintaining thermal performance suitable for high-density layouts.
How does the AT25FF321A-MHN-T implement memory protection?
The AT25FF321A-MHN-T provides three-tiered memory protection: individual block lock (36h/39h), global lock/unlock (7Eh/98h), and user-definable protected regions at memory array start or end (default enabled). Protection status is controlled via Status Register bits and can be made volatile or non-volatile. All schemes are enforced at the hardware level-no software intervention required-and remain active during power cycles. AT25FF321A-MHN-T also supports OTP security registers (3 × 128 bytes) for permanent key storage, ensuring firmware integrity against unauthorized modification. These features collectively satisfy secure boot and OTA update requirements.
What is the ultra-deep power-down current specification for the AT25FF321A-MHN-T?
The AT25FF321A-MHN-T draws only 5–7 nA in ultra-deep power-down mode (activated via 79h command), measured at 25°C and VCC = 3.0 V. This ultra-low quiescent current enables multi-year operation on primary coin-cell batteries in intermittently active sensor nodes. Recovery time from ultra-deep power-down is 30 µs maximum, allowing rapid resumption of operation upon wake-up interrupt. The AT25FF321A-MHN-T maintains full data retention and register state across this mode, and no reinitialization sequence is required after exit-ensuring seamless integration into low-power MCU sleep/wake architectures.
AT25FF321A-MHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25FF321A-MHN-T FAQ
1.How can I place an order for AT25FF321A-MHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF321A-MHN-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 AT25FF321A-MHN-T reliable?
The price and inventory of AT25FF321A-MHN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25FF321A-MHN-T is usually 5 days.
3.What payment methods are accepted for AT25FF321A-MHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF321A-MHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF321A-MHN-T?
AT25FF321A-MHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF321A-MHN-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 AT25FF321A-MHN-T?
For technical support, including AT25FF321A-MHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF321A-MHN-T requirements.
6.How does Aetrix verify that AT25FF321A-MHN-T is sourced from the original manufacturer or authorized distributors?
All AT25FF321A-MHN-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 AT25FF321A-MHN-T meets industry standards.
7.What is the process for return or replacement of AT25FF321A-MHN-T?
All AT25FF321A-MHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF321A-MHN-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 AT25FF321A-MHN-T part is unused and in its original packaging.
Return procedure for AT25FF321A-MHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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