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Renesas AT25FF321A-SSHN-T
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- Part No.:
- AT25FF321A-SSHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25FF321A-SSHN-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:44,006
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Product details
Overview
AT25FF321A-SSHN-T from Renesas Electronics is a 32-Mbit SPI serial flash memory IC supporting 1.65 V–3.6 V operation, quad I/O (1-4-4) and XiP modes, 133 MHz max clock frequency, and ultra-low 5–7 nA ultra-deep power-down current. It serves as non-volatile program storage or direct code execution (XiP) in resource-constrained embedded systems.
For engineers reviewing the AT25FF321A-SSHN-T datasheet, AT25FF321A-SSHN-T pinout, AT25FF321A-SSHN-T application, or AT25FF321A-SSHN-T equivalent, key selection criteria include multi-I/O read bandwidth, erase granularity (4/32/64 kB blocks), OTP security register support, JEDEC SFDP compliance, and ultra-low-power deep-sleep states for battery-powered edge devices.
Technical Context
The AT25FF321A-SSHN-T implements a flexible SPI interface with hardware-selectable dual/quad I/O and continuous-read XiP mode using 4-bit address/data bus (I/O0–I/O3). Its internal architecture includes a 256-byte SRAM buffer, status register bank (SR1–SR5), and dedicated OTP security registers (3 × 128 bytes).
It supports nested operations - e.g., suspend/resume of erase or program cycles - and features JEDEC-standard hardware reset, volatile/non-volatile status registers, and configurable I/O drive strength. Memory protection is enforced via individual block lock, global lock, and user-definable protected regions at memory boundaries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB) - sufficient for firmware images, boot code, and configuration data in compact MCU-based systems. |
| Supply Voltage Range | 1.65 V to 3.6 V - enables direct integration with 1.8 V, 2.5 V, and 3.3 V logic domains without level-shifting. |
| Max Clock Frequency | 133 MHz (1-1-1 mode) - delivers up to 133 MB/s raw throughput in standard SPI; higher effective bandwidth in quad I/O (1-4-4) mode. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks + full chip - allows fine-grained firmware updates without erasing entire memory space. |
| Power Consumption | 5–7 nA ultra-deep power-down current - extends battery life in always-on IoT sensors and wearables. |
| Data Retention & Endurance | 20 years retention, 100,000 program/erase cycles - meets industrial-grade reliability requirements for field-deployed equipment. |
| Security Features | 1×128-byte factory UID + 3×128-byte OTP registers - enables secure device identity, key storage, and immutable configuration locking. |
Pinout & Package
AT25FF321A-SSHN-T is packaged in an 8-pin SOIC (208-mil) body per JEDEC MS-012AA, with gull-wing leads and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; controls device selection and entry into standby mode when deasserted. |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; rising edge latches input, falling edge clocks out output. |
| SI (I/O0) | Serial Input / Quad I/O Line 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad I/O operations. |
| SO (I/O1) | Serial Output / Quad I/O Line 1 | Primary data output; becomes bidirectional I/O1 during dual/quad I/O reads/writes. |
| WP (I/O2) | Write Protect / Quad I/O Line 2 | Hardware write-protection when low; functions as I/O2 in quad I/O modes. |
| HOLD/RESET (I/O3) | Hold Input / Reset Function / Quad I/O Line 3 | Pauses ongoing transfers when asserted; also serves as hardware reset and I/O3 in quad modes. |
| VCC | Power Supply | 1.65–3.6 V supply input; powers core logic, memory array, and I/O drivers. |
| GND | Ground | Reference return path for all digital and analog circuitry; must be low-impedance for stable timing. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables 4-bit parallel data transfer (1-4-4) and execute-in-place operation, reducing instruction fetch latency in microcontroller boot sequences. |
| Erase/Program Suspend | Allows interruption of long-duration erase or program cycles to service time-critical host requests, then resume without data loss. |
| JEDEC SFDP Compliance | Provides standardized, software-readable parameter tables enabling automatic driver configuration across host platforms without hard-coded assumptions. |
| User-Configurable I/O Drive Strength | Permits optimization of signal integrity and EMI in varying PCB trace lengths and loading conditions without external termination components. |
| Multiple Protection Schemes | Combines individual block lock, global lock, and start/end-of-array region protection to prevent accidental or malicious firmware corruption. |
Applications
| Industrial PLC Firmware Storage | Smart Meter Boot Code Execution |
|---|---|
Use Scenario: Storing and executing real-time control firmware in programmable logic controllers operating in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Non-volatile program memory providing XiP capability for deterministic boot and runtime code fetch. Use Value: Eliminates need for external RAM copy step, reducing BOM count and boot time while maintaining 20-year data retention under thermal cycling. |
Use Scenario: Secure storage of metrology firmware and calibration parameters in utility-grade smart electricity meters with tamper detection. IC Role / Device Role / Timing Role: Trusted firmware repository with OTP-locked security keys and hardware write protection against unauthorized reprogramming. Use Value: Meets IEC 62056 and ANSI C12.22 requirements via factory UID, 3×128-byte OTP registers, and individual block lock for critical calibration sectors. |
| Wireless Sensor Node Configuration | Medical Wearable Data Logging |
Use Scenario: Storing sensor fusion algorithms and network stack configurations in BLE/Zigbee end nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power persistent memory supporting ultra-deep power-down (5–7 nA) between wake-up intervals. Use Value: Extends operational lifetime beyond 5 years on CR2032 by minimizing quiescent current during sleep, while retaining full 32-Mbit capacity for OTA update staging. |
Use Scenario: Recording physiological waveforms and device settings in FDA-cleared wearable ECG monitors requiring data integrity and auditability. IC Role / Device Role / Timing Role: Reliable, high-endurance (100k cycles) storage for time-stamped clinical logs with secure access control. Use Value: Ensures 20-year data retention and supports encrypted log partitioning using OTP registers to enforce HIPAA-compliant access policies. |
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 or 2.7–3.6 V dual supply; no ultra-deep power-down (7 µA DPD only); lacks XiP continuous-read mode. | Preferred where dual-voltage flexibility matters more than sub-10-nA sleep current or XiP performance. | Choose W25Q32JW if system uses mixed 1.8 V/3.3 V rails and does not require XiP or ultra-low-power sleep. |
| Micron MT25QL32ABA | 32-Mbit, 2.7–3.6 V only; supports 133 MHz quad I/O but no OTP registers or factory UID; SFDP v1.6 vs. AT25FF321A's v1.7. | Used in cost-sensitive consumer electronics where security features and wide voltage range are secondary. | Choose MT25QL32ABA for high-volume consumer designs needing proven qualification and broad toolchain support, without security or ultra-low-power needs. |
Compared with W25Q32JW and MT25QL32ABA, the AT25FF321A-SSHN-T uniquely combines ultra-deep power-down current (5–7 nA), factory-programmed UID, three OTP security registers, and XiP-optimized continuous-read mode - making it optimal for secure, battery-constrained industrial and medical edge devices.
Availability
AT25FF321A-SSHN-T is available at Aetrix Electronics and suitable for industrial automation firmware storage, smart meter boot code execution, and wireless sensor node configuration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25FF321A-SSHN-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power management, and memory solutions for industrial, automotive, and infrastructure markets.
The AT25FF321A belongs to Renesas' high-reliability serial flash product line, engineered for robust operation in extended temperature ranges and demanding power-constrained applications such as smart grid endpoints and portable medical devices.
FAQ
What is the operating voltage range supported by the AT25FF321A-SSHN-T?
The AT25FF321A-SSHN-T operates across a single supply range of 1.65 V to 3.6 V, enabling compatibility with 1.8 V, 2.5 V, and 3.3 V system rails without external level shifters. This wide range supports battery-powered devices during discharge and ensures reliable operation across diverse industrial voltage domains.
Does the AT25FF321A-SSHN-T support execute-in-place (XiP) functionality?
Yes, the AT25FF321A-SSHN-T supports XiP via its quad I/O (1-4-4) and continuous-read (0-4-4) modes, allowing microcontrollers to fetch instructions directly from flash without copying to RAM. This reduces boot time and eliminates external RAM dependency in memory-constrained designs.
How many one-time programmable (OTP) security registers does the AT25FF321A-SSHN-T include?
The AT25FF321A-SSHN-T includes three 128-byte OTP security registers, each permanently programmable once and lockable via dedicated commands. These registers are used for storing cryptographic keys, device-specific credentials, or immutable configuration flags that must survive power cycles and firmware updates.
What is the lowest power-consumption state available on the AT25FF321A-SSHN-T?
The AT25FF321A-SSHN-T offers Ultra-Deep Power-Down (UDPD) mode with typical current draw of 5–7 nA. This state retains full memory contents and register settings while minimizing leakage, making it ideal for multi-year battery operation in intermittently active IoT endpoints.
Is the AT25FF321A-SSHN-T compatible with JEDEC-standard Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25FF321A-SSHN-T fully complies with JEDEC JESD216B SFDP v1.7, exposing standardized parameter tables via command 5Ah. This enables automatic host driver initialization, eliminating hardcoded timing assumptions and simplifying firmware portability across different flash vendors.
AT25FF321A-SSHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
AT25FF321A-SSHN-T FAQ
1.How can I place an order for AT25FF321A-SSHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF321A-SSHN-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-SSHN-T reliable?
The price and inventory of AT25FF321A-SSHN-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-SSHN-T is usually 5 days.
3.What payment methods are accepted for AT25FF321A-SSHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF321A-SSHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF321A-SSHN-T?
AT25FF321A-SSHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF321A-SSHN-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-SSHN-T?
For technical support, including AT25FF321A-SSHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF321A-SSHN-T requirements.
6.How does Aetrix verify that AT25FF321A-SSHN-T is sourced from the original manufacturer or authorized distributors?
All AT25FF321A-SSHN-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-SSHN-T meets industry standards.
7.What is the process for return or replacement of AT25FF321A-SSHN-T?
All AT25FF321A-SSHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF321A-SSHN-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-SSHN-T part is unused and in its original packaging.
Return procedure for AT25FF321A-SSHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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