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Renesas AT25FF081A-SHN-T
- Part No.:
- AT25FF081A-SHN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25FF081A-SHN-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:85,450
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Product details
Overview
AT25FF081A-SHN-T from Renesas Electronics is an 8-Mbit SPI serial flash memory IC supporting 1.65 V–3.6 V operation, quad I/O (1-4-4) and eXecute-in-Place (XiP) modes, and 133 MHz max clock frequency. It delivers uniform 4-kB/32-kB/64-kB block erase, byte/page programming (1–256 bytes), and ultra-low-power Deep Power-Down (8.5 µA) for embedded boot code storage in resource-constrained IoT edge nodes.
For engineers reviewing the AT25FF081A-SHN-T datasheet, AT25FF081A-SHN-T pinout, AT25FF081A-SHN-T application, or AT25FF081A-SHN-T equivalent, this page provides verified pin functions, XiP timing behavior, OTP security register configuration, JEDEC SFDP compliance, and real-world power/erase endurance trade-offs at -40°C to +105°C.
Technical Context
The AT25FF081A-SHN-T implements a dual-mode SPI interface with hardware-selectable HOLD/RESET functionality and supports four distinct data transfer protocols: standard single-I/O (1-1-1), dual-output (1-1-2), quad-output (1-1-4), and full quad I/O (1-4-4) including XiP mode with continuous read (0-4-4). Its internal architecture integrates a 256-byte SRAM buffer and dedicated I/O interface unit optimized for burst-aligned sequential access.
Memory protection is implemented via individual block lock (36h/39h), global lock (7Eh/98h), and user-definable protected regions at memory start/end. Status registers (SR1–SR5) are non-volatile and support indirect addressing, with SR lock (6Fh) enabling write-protection of critical bits. The device complies with JEDEC JESD216B SFDP v1.6 for automatic parameter discovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 × 8-bit) - sufficient for firmware images up to ~1 MB in microcontroller boot applications. |
| Supply Voltage Range | 1.65 V – 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V host systems without level shifters. |
| Max Clock Frequency | 133 MHz (1-1-1 mode) - achieves up to 133 MB/s effective throughput in quad I/O mode with dummy cycles removed. |
| Erase Endurance | 100k cycles @ -40°C to +85°C - supports field firmware updates over 10+ years in industrial gateways. |
| Data Retention | 20 years @ -40°C to +85°C - ensures long-term reliability for unattended deployed devices without refresh. |
| Deep Power-Down Current | 8.5 µA typical - reduces system standby power by >90% vs active read mode (8.5 mA), critical for battery life. |
| OTP Security Registers | 3 × 128-byte one-time programmable registers - enable secure key storage, device binding, and anti-cloning features. |
Pinout & Package
AT25FF081A-SHN-T is packaged in an 8-pad, 2 mm × 3 mm × 0.6 mm DFN (Dual Flat No-lead) package with wettable flank leads, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable signal; deassertion places device in standby (not DPD); required before all commands. |
| SCK | Serial Clock Input | Drives all SPI timing; supports up to 133 MHz; phase/polarity configurable for SPI modes 0 and 3. |
| SI (I/O0) | Serial Data Input / Quad I/O Lane 0 | Primary command/address/data input in 1-1-1/1-1-2/1-1-4; becomes bidirectional I/O0 in 1-4-4/XiP mode. |
| SO (I/O1) | Serial Data Output / Quad I/O Lane 1 | Primary output in 1-1-1; dual/quad data lane in 1-1-2/1-1-4/1-4-4; high-impedance when CS deasserted. |
| WP (I/O2) | Write Protect Input / Quad I/O Lane 2 | Hardware write protection when low; functions as I/O2 in quad I/O modes; supports status register lock. |
| HOLD/RESET (I/O3) | Hold or Hardware Reset Input / Quad I/O Lane 3 | Pauses ongoing transfers (HOLD) or performs JEDEC-standard reset (RESET); serves as I/O3 in quad modes. |
| VCC | Power Supply | 1.65–3.6 V core supply; decoupling capacitor required per datasheet layout guidelines (Section 10). |
| GND | Ground Reference | Signal and power ground; must be connected to PCB ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| eXecute-in-Place (XiP) Support | Enables direct CPU instruction fetch from flash via 0-4-4 command format, eliminating boot copy latency and RAM footprint. |
| Quad I/O (1-4-4) Mode | Doubles effective bandwidth vs quad output (1-1-4) by using all four I/O pins for address and data, reducing bus contention. |
| Flexible Erase Architecture | Uniform 4-kB/32-kB/64-kB blocks + full-chip erase allows granular firmware update partitioning without wasted space. |
| Ultra-Deep Power-Down (UDPD) | 7 nA typical current draw extends shelf life and battery runtime in always-off sensor nodes and wearables. |
| JEDEC SFDP v1.6 Compliance | Allows host bootloader to auto-detect timing parameters, voltage thresholds, and command sets without hard-coded tables. |
| Factory-Programmed UID | 128-byte unique identifier enables device authentication, secure provisioning, and traceability in production lines. |
Applications
| Industrial PLC Firmware Storage | Automotive Telematics Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration data in programmable logic controllers operating continuously in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Primary non-volatile boot memory providing XiP execution and fast reprogramming during OTA updates. Use Value: 20-year data retention and 100k erase cycles ensure firmware integrity across 15+ year product lifecycles without replacement. |
Use Scenario: Hosting boot loader and secure boot keys in automotive telematics control units requiring AEC-Q100 Grade 3 qualification. IC Role / Device Role / Timing Role: Secure, low-power serial flash with OTP registers for cryptographic key storage and authenticated boot. Use Value: 3×128-byte OTP registers and SR lock (6Fh) prevent unauthorized firmware modification and cloning attacks. |
| IoT Edge Node Code Storage | Medical Wearable Sensor Log Memory |
Use Scenario: Holding application firmware and calibration tables in battery-powered wireless sensors deployed in remote locations. IC Role / Device Role / Timing Role: Low-voltage (1.65 V) serial flash enabling direct connection to 1.8 V SoCs and ultra-low-power DPD/UDPD states. Use Value: 8.5 µA DPD and 7 nA UDPD currents extend coin-cell battery life to >5 years in sleep-dominated duty cycles. |
Use Scenario: Recording time-stamped physiological sensor data in compact wearable patches with strict size and power constraints. IC Role / Device Role / Timing Role: High-reliability, small-footprint (2×3 mm DFN) flash supporting rapid page programming (≤10 ms) for burst logging. Use Value: Uniform 4-kB block erase enables efficient circular buffer management without fragmentation overhead. |
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 W25Q80DVSSIG | 8 Mbit, 1.65–3.6 V, supports 133 MHz quad I/O but lacks XiP continuous read (0-4-4) and OTP security registers. | No native XiP acceleration or hardware key storage; requires external crypto co-processor for secure boot. | Select when cost sensitivity outweighs XiP performance and security requirements. |
| Micron MT25QL80ABB8E12-0SIT | 8 Mbit, 1.7–2.0 V only (narrower range), supports 133 MHz quad I/O and SFDP, but no UDPD mode (min 25 µA DPD). | Not suitable for 3.3 V or battery-backed 1.65 V systems; higher standby current limits use in ultra-low-power wearables. | Select only for fixed 1.8 V designs where UDPD is not required and JEDEC JESD216C compliance is preferred. |
Compared with W25Q80DVSSIG and MT25QL80ABB8E12-0SIT, the AT25FF081A-SHN-T uniquely combines wide-voltage operation, XiP-optimized 0-4-4 mode, and integrated OTP security-enabling secure, low-power, high-performance boot in a single 2×3 mm DFN package.
Availability
AT25FF081A-SHN-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive telematics boot memory, and IoT edge node code storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT25FF081A-SHN-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with deep expertise in flash memory architecture and system-level integration.
The AT25FF081A-SHN-T belongs to Renesas' high-performance serial flash product line, engineered specifically for secure, low-power, and XiP-capable firmware storage in next-generation edge-connected devices.
FAQ
What is the operating temperature range supported by the AT25FF081A-SHN-T?
The AT25FF081A-SHN-T is rated for operation from -40°C to +105°C, with guaranteed performance specifications including 10k program/erase cycles and 10-year data retention at the extended upper limit. This makes the AT25FF081A-SHN-T suitable for under-hood automotive modules and industrial control cabinets exposed to thermal stress.
Does the AT25FF081A-SHN-T support true execute-in-place (XiP) operation?
Yes, the AT25FF081A-SHN-T supports XiP via its 0-4-4 command format, which eliminates opcode transmission after initial setup and enables continuous burst reads directly into CPU instruction pipelines. This capability is confirmed in Section 1 (Product Overview) and Section 5.6 (XiP Mode Operation) of the AT25FF081A-SHN-T datasheet.
How many one-time programmable (OTP) security registers does the AT25FF081A-SHN-T include?
The AT25FF081A-SHN-T includes three 128-byte OTP security registers (OTP0–OTP2), each individually lockable via the Program Security Register (9Bh) and Read OTP Security Register (4Bh) commands. These registers are physically irreversible and used for storing cryptographic keys, device IDs, or calibration data in the AT25FF081A-SHN-T.
What is the minimum deep power-down current for the AT25FF081A-SHN-T?
The AT25FF081A-SHN-T achieves a typical deep power-down (DPD) current of 8.5 µA and an ultra-deep power-down (UDPD) current of 7 nA, both measured at VCC = 3.0 V and TA = 25°C. These values are specified in the "Low power dissipation" feature list on page 1 of the AT25FF081A-SHN-T datasheet.
Is the AT25FF081A-SHN-T compatible with JEDEC-standard hardware reset?
Yes, the AT25FF081A-SHN-T implements JEDEC-standard hardware reset via the HOLD/RESET pin (I/O3), as documented in Section 5.12 and Figure 22 of the AT25FF081A-SHN-T datasheet. Asserting RESET while CS is high initiates a synchronous reset that clears internal state and restores default configuration without requiring VCC cycling.
AT25FF081A-SHN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 8Mbit
- Memory Organization:
- 2M x 4
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 22µs, 6.5ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25FF081A-SHN-T FAQ
1.How can I place an order for AT25FF081A-SHN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF081A-SHN-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 AT25FF081A-SHN-T reliable?
The price and inventory of AT25FF081A-SHN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25FF081A-SHN-T is usually 5 days.
3.What payment methods are accepted for AT25FF081A-SHN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF081A-SHN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF081A-SHN-T?
AT25FF081A-SHN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF081A-SHN-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 AT25FF081A-SHN-T?
For technical support, including AT25FF081A-SHN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF081A-SHN-T requirements.
6.How does Aetrix verify that AT25FF081A-SHN-T is sourced from the original manufacturer or authorized distributors?
All AT25FF081A-SHN-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 AT25FF081A-SHN-T meets industry standards.
7.What is the process for return or replacement of AT25FF081A-SHN-T?
All AT25FF081A-SHN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF081A-SHN-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 AT25FF081A-SHN-T part is unused and in its original packaging.
Return procedure for AT25FF081A-SHN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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