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Renesas AT25FF321A-SSPN-T
- Part No.:
- AT25FF321A-SSPN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25FF321A-SSPN-T.pdf
- Description:
- IC FLASH 32MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
AT25FF321A-SSPN-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, and 133 MHz max clock frequency. It delivers 4-kByte/32-kByte/64-kByte block erase, byte/page programming (1–256 bytes), and 20-year data retention for embedded boot code and firmware storage in space-constrained industrial and IoT devices.
For engineers reviewing the AT25FF321A-SSPN-T datasheet, AT25FF321A-SSPN-T pinout, AT25FF321A-SSPN-T application, or AT25FF321A-SSPN-T equivalent, key selection criteria include multi-I/O read performance, ultra-low deep power-down current (5–7 nA), JEDEC-standard SFDP support, OTP security register configuration, and compatibility with host SPI controllers requiring 1-1-2/1-1-4/1-4-4 transfer modes.
Technical Context
The AT25FF321A-SSPN-T implements a dual-mode SPI interface with configurable I/O drive strength and supports nested program/erase suspend-resume operations. Its architecture integrates a 256-byte SRAM buffer, five status registers (SR1–SR5), and hardware reset compliance per JEDEC JESD22-A102.
It enables eXecute-in-Place (XiP) via continuous-read 0-4-4 command format and burst wrap control (77h), eliminating opcode retransmission overhead. Memory protection includes individual block lock (36h), global lock (7Eh), and user-definable protected regions at array start/end.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (4 MB) - sufficient for full MCU boot image + firmware update partition in resource-limited edge nodes. |
| Interface Protocol | SPI with modes 0/3, dual-output (1-1-2), quad-output (1-1-4), quad I/O (1-4-4), and XiP (0-4-4) - enables scalable bandwidth from 104 MHz (1-1-1) to 133 MHz (1-4-4). |
| Operating Voltage | 1.65 V to 3.6 V - supports direct integration with 1.8 V and 3.3 V logic domains without level-shifting. |
| Power Consumption | 7 µA Deep Power-Down, 5–7 nA Ultra-Deep Power-Down - extends battery life in always-on sensor nodes. |
| Erase/Program Endurance | 100,000 cycles - validated for field-updatable firmware partitions subject to frequent OTA updates. |
| Data Retention | 20 years at +85 °C - meets long-life requirements for industrial control and automotive infotainment modules. |
| Temperature Range | −40 °C to +85 °C - qualified for extended-temperature operation in outdoor gateways and factory automation PLCs. |
Pinout & Package
AT25FF321A-SSPN-T is packaged in an 8-pin SOIC (208-mil) with gull-wing leads, RoHS-compliant, green finish, and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high-to-low to initiate command sequence and low-to-high to terminate; requires 10 kΩ pull-up to VCC for robust power-up sequencing. |
| SCK | Serial Clock | Input-only clock; rising edge latches SI data, falling edge clocks SO data; supports up to 133 MHz in quad I/O mode. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad reads/writes; supports configurable drive strength. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Default output for standard SPI reads; functions as I/O1 in multi-I/O modes; high-impedance when CS is deasserted. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write-protection when held low; serves as I/O2 in quad I/O transfers; supports software-controlled protection via status registers. |
| HOLD/RESET (I/O3) | Hold Input / Hardware Reset | Pauses ongoing transfers when asserted low; double-function pin enabling JEDEC-standard hardware reset (99h) and suspend/resume coordination. |
| VCC | Supply Voltage | 1.65–3.6 V input; powers internal charge pump for erase/program operations; decoupling capacitor required per datasheet layout guidelines. |
| GND | Ground | Reference for all I/O and core logic; must be connected to system ground plane with low-inductance path to minimize noise coupling into SPI signals. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables 0-4-4 continuous read mode with no repeated opcodes - reduces instruction fetch latency by >40% vs. standard SPI in microcontroller boot sequences. |
| Flexible Erase Architecture | Four granular erase options (4/32/64 kByte blocks + full chip) allow selective firmware update without disturbing calibration data or secure keys stored in adjacent sectors. |
| OTP Security Registers | Three 128-byte One-Time Programmable registers - used to store cryptographic keys, device-specific identifiers, or immutable boot policy flags with permanent write-lock capability. |
| Ultra-Low Power Modes | 5–7 nA Ultra-Deep Power-Down current - permits multi-year operation on coin-cell batteries in wireless sensor transmitters with infrequent wake-up intervals. |
| SFDP Compliance | JEDEC JESD216-compliant Serial Flash Discoverable Parameters - enables automatic host driver configuration of timing, voltage, and command set without hard-coded initialization tables. |
| Multi-Level Protection | Combines hardware WP/HOLD pins, software-configurable block locks, and volatile/non-volatile status register protection - prevents accidental or malicious firmware corruption during field updates. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Boot Memory |
|---|---|
Use Scenario: Storing firmware images and runtime configuration data in programmable logic controllers deployed in factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Non-volatile boot memory providing XiP-capable instruction fetch directly to Cortex-M7 CPU core during cold start and warm reset. Use Value: 133 MHz quad I/O read speed ensures sub-100 ms boot time; −40 °C to +85 °C rating guarantees reliable operation across unconditioned control cabinets. |
Use Scenario: Serving as primary firmware storage in battery-powered environmental sensors transmitting data over LoRaWAN or NB-IoT every 15 minutes. IC Role / Device Role / Timing Role: Low-power persistent memory holding bootloader, application firmware, and OTA update staging area. Use Value: 5–7 nA Ultra-Deep Power-Down current extends 10-year battery life; SFDP auto-configuration simplifies firmware porting across sensor variants. |
| Automotive Infotainment Display Boot | Medical Wearable Configuration Store |
Use Scenario: Loading display controller firmware and UI assets in automotive head units where fast startup and functional safety are critical. IC Role / Device Role / Timing Role: SPI-connected flash memory executing boot code in-place for ARM Cortex-A53 application processor during ASIL-B compliant boot sequence. Use Value: 100,000 erase/program cycles support frequent firmware patches; OTP registers securely store calibration offsets and display gamma tables. |
Use Scenario: Storing patient-specific therapy parameters, device serial number, and regulatory compliance metadata in FDA-cleared wearable insulin pumps. IC Role / Device Role / Timing Role: Secure non-volatile memory with write-protection and tamper-evident OTP locking for audit-trail-critical configuration data. Use Value: Individual block lock (36h) isolates sensitive fields from routine firmware updates; 20-year data retention meets medical device shelf-life requirements. |
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-SN | 32 Mbit, 1.7–1.95 V / 2.7–3.6 V dual supply; supports octal DTR mode; lacks XiP continuous-read (0-4-4) and UDPD mode. | Preferred for high-speed, dual-supply systems needing >133 MHz bandwidth; unsuitable for ultra-low-power battery use cases requiring <10 nA standby. | Select W25Q32JW-SN only if host supports octal DTR and system voltage rails match its split VCC/VIO requirement. |
| Micron MT25QL32ABA8E12-0SIT | 32 Mbit, 2.7–3.6 V only; supports 133 MHz quad I/O but no Ultra-Deep Power-Down; uses different SFDP parameter table layout. | Valid for 3.3 V industrial designs with standard deep power-down (7 µA); not viable for 1.8 V or sub-µA sleep scenarios. | Choose MT25QL32ABA8E12-0SIT when legacy 3.3 V infrastructure exists and UDPD is unnecessary; verify SFDP parser compatibility. |
Compared with Winbond W25Q32JW-SN and Micron MT25QL32ABA8E12-0SIT, the AT25FF321A-SSPN-T uniquely combines 1.65 V operation, 5–7 nA UDPD, and true 0-4-4 XiP mode - making it the only option for battery-powered, single-rail, fast-boot embedded systems requiring both longevity and responsiveness.
Availability
AT25FF321A-SSPN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node boot memory, automotive infotainment display boot, and medical wearable configuration store requiring stable component supply across multi-year production cycles.
Supply support for AT25FF321A-SSPN-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 enterprise applications.
The AT25FF321A belongs to Renesas' AT25FF family of high-reliability SPI flash memories engineered for embedded systems demanding low-voltage operation, ultra-low power states, and secure firmware storage with OTP-based key management.
FAQ
What is the maximum clock frequency supported by the AT25FF321A-SSPN-T in quad I/O mode?
The AT25FF321A-SSPN-T supports a maximum operating frequency of 133 MHz in quad I/O (1-4-4) mode, as specified in Section 7.4 of the datasheet. This enables peak read throughput of approximately 66.5 MB/s under ideal conditions, assuming continuous 0-4-4 XiP operation with no dummy cycles. The actual achievable rate depends on host controller timing margins and PCB signal integrity.
Does the AT25FF321A-SSPN-T support execute-in-place (XiP) functionality, and how is it implemented?
Yes, the AT25FF321A-SSPN-T supports eXecute-in-Place (XiP) via the 0-4-4 command format (EBh/E7h), which eliminates repeated opcode transmission during sequential instruction fetch. The device uses a 256-byte SRAM buffer and burst wrap control (77h) to sustain high-speed reads without host intervention. This allows direct CPU execution from flash in Cortex-M and RISC-V systems without copying to RAM.
How many One-Time Programmable (OTP) security registers does the AT25FF321A-SSPN-T provide, and what is their capacity?
The AT25FF321A-SSPN-T provides three 128-byte One-Time Programmable (OTP) security registers, accessible via command 9Bh (Program Security Register) and 4Bh (Read OTP Security Register). Each register can be individually locked after programming using the OTP lock mechanism described in Section 4.11. These registers are commonly used to store cryptographic keys, device IDs, or immutable boot policies.
What is the ultra-deep power-down (UDPD) current specification for the AT25FF321A-SSPN-T, and how is it entered?
The AT25FF321A-SSPN-T draws 5–7 nA in Ultra-Deep Power-Down (UDPD) mode, entered via command 79h (Section 6.31). This state retains memory contents while minimizing leakage, ideal for battery-powered devices with years-long sleep intervals. Recovery requires ABh command with device ID verification, ensuring deterministic wake-up without external reset assertion.
Is the AT25FF321A-SSPN-T compatible with JEDEC-standard Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25FF321A-SSPN-T fully complies with JEDEC JESD216 for Serial Flash Discoverable Parameters, accessed via command 5Ah. Its SFDP table includes vendor-defined extensions for OTP register mapping, XiP timing parameters, and UDPD entry/exit sequences - enabling automatic host driver initialization without hardcoded configuration tables.
AT25FF321A-SSPN-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:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 32Mbit
- Memory Organization:
- 2M x 16
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 32µs, 10.5ms
- Access Time:
- 8 ns
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25FF321A-SSPN-T FAQ
1.How can I place an order for AT25FF321A-SSPN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF321A-SSPN-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-SSPN-T reliable?
The price and inventory of AT25FF321A-SSPN-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-SSPN-T is usually 5 days.
3.What payment methods are accepted for AT25FF321A-SSPN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF321A-SSPN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF321A-SSPN-T?
AT25FF321A-SSPN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF321A-SSPN-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-SSPN-T?
For technical support, including AT25FF321A-SSPN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF321A-SSPN-T requirements.
6.How does Aetrix verify that AT25FF321A-SSPN-T is sourced from the original manufacturer or authorized distributors?
All AT25FF321A-SSPN-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-SSPN-T meets industry standards.
7.What is the process for return or replacement of AT25FF321A-SSPN-T?
All AT25FF321A-SSPN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF321A-SSPN-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-SSPN-T part is unused and in its original packaging.
Return procedure for AT25FF321A-SSPN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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