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Renesas AT25FF081A-SSHN-B
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- Part No.:
- AT25FF081A-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25FF081A-SSHN-B.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:75,461
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Product details
Overview
AT25FF081A-SSHN-B from Renesas Electronics is an 8 Mbit serial Flash memory IC with SPI interface, supporting 1.65 V–3.6 V operation, 133 MHz max clock frequency, and multi-I/O modes (1-1-2, 1-1-4, 1-4-4, XiP). It delivers 8 ns clock-to-output timing and features uniform 4/32/64 kB block erase, 100,000 program/erase cycles, and 20-year data retention - deployed in code shadowing and firmware storage for battery-powered IoT edge nodes.
For engineers reviewing the AT25FF081A-SSHN-B datasheet, AT25FF081A-SSHN-B pinout, AT25FF081A-SSHN-B application, or AT25FF081A-SSHN-B equivalent, key selection criteria include voltage range compatibility (1.65–3.6 V), XiP support for direct execution, quad I/O throughput, OTP security register availability, and SOIC-8 (208-mil) package footprint alignment with legacy PCB layouts.
Technical Context
The AT25FF081A-SSHN-B implements a dedicated SPI-compatible interface with hardware reset (HOLD/RESET pin), JEDEC-standard ID read (9Fh), and Serial Flash Discoverable Parameters (SFDP v1.6). Its internal architecture integrates a 256-byte SRAM buffer, flexible status register configuration (volatile/non-volatile), and nested erase/program suspend/resume capability.
It supports four distinct data transfer modes: 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 execute-in-place (XiP) with 0-4-4 addressing. Erase granularity is fixed at physical 2 Mbit blocks, subdivided into uniform 4 kB, 32 kB, and 64 kB logical sectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (4 × 2 Mbit physical blocks); enables compact firmware storage without external memory expansion. |
| Operating Voltage | 1.65 V – 3.6 V; compatible with single-cell Li-ion, Li-polymer, and regulated 3.3 V/2.5 V rails. |
| Max Clock Frequency | 133 MHz (1-4-4 mode); achieves up to 532 MB/s effective read bandwidth in quad I/O configuration. |
| Read Latency | 8 ns clock-to-output; minimizes instruction fetch delay in XiP applications. |
| Erase Granularity | Uniform 4 kB / 32 kB / 64 kB blocks + full chip; balances fine-grained data updates with efficient code partitioning. |
| Power Consumption | 7 nA Ultra Deep Power-Down current; extends battery life in always-on sensor nodes during idle periods. |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention at +85 °C; validated for industrial lifecycle requirements. |
Pinout & Package
AT25FF081A-SSHN-B is packaged in an 8-lead EIAJ SOIC (208-mil) body, pin-compatible with industry-standard 8S2 footprint. Pin functions are electrically defined per JEDEC MS-012 and support shared I/O roles across SPI modes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition and terminates on low-to-high. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Command/address/data input in 1-1-1; becomes bidirectional I/O0 in 1-4-4/XiP modes. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Data output in 1-1-1; bidirectional I/O1 in multi-I/O modes; high-Z when CS deasserted. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write lock when low; serves as I/O2 in quad configurations; non-volatile protection configurable. |
| HOLD/RESET (I/O3) | Hold or Hardware Reset | Pauses ongoing transfers (HOLD) or triggers JEDEC reset (RESET); dual-function I/O3 in quad mode. |
| VCC | Power Supply | 1.65–3.6 V supply; powers core logic, memory array, and I/O drivers; decoupling required per datasheet. |
| GND | Ground | Reference return path for all signals and power; must be low-impedance connection to minimize noise. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-I/O Flexibility | Supports 1-1-1, 1-1-2, 1-1-4, 1-4-4, and XiP (0-4-4) modes - enables bandwidth scaling without changing controller IP. |
| OTP Security Registers | Four 128-byte One-Time Programmable registers (3 user + 1 factory ID); enables secure boot key binding and device identity provisioning. |
| Erase/Program Suspend | Allows interruption of long erase/program operations to service time-critical reads; resumes without data loss or state corruption. |
| Ultra-Low Power States | 7 nA UDPD and 8.5 µA DPD currents; reduces quiescent draw in battery-backed systems where wake latency is acceptable. |
| Flexible Block Protection | Individual and global lock/unlock commands (36h/39h/7Eh/98h); supports hierarchical firmware update zones with hardware-enforced write disable. |
Applications
| IoT Edge Sensor Node | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature/humidity data every 5 seconds, storing local logs and OTA firmware patches. IC Role / Device Role / Timing Role: Non-volatile firmware and configuration storage; executes boot code directly via XiP mode; handles background log writes during sensor idle cycles. Use Value: 7 nA UDPD current extends 200 mAh coin cell life beyond 5 years; 4 kB erase blocks allow atomic log sector updates without disturbing active firmware. |
Use Scenario: Compact wearable tracking heart rate and motion, requiring secure firmware updates and encrypted health data logging. IC Role / Device Role / Timing Role: Secure code storage with OTP-bound keys; stores encrypted sensor buffers and signed firmware images; supports fast 133 MHz quad reads for UI responsiveness. Use Value: Four OTP registers enable unique device identity and immutable root-of-trust key storage; 100K endurance ensures >10 years of daily firmware updates. |
| Industrial PLC Module | Smart Home Hub Controller |
Use Scenario: DIN-rail mounted programmable logic controller storing ladder logic programs, I/O mapping tables, and calibration coefficients. IC Role / Device Role / Timing Role: Code shadowing target for ARM Cortex-M7 CPU; provides deterministic 8 ns read latency for real-time instruction fetch; supports field-upgradeable firmware partitions. Use Value: Uniform 64 kB erase blocks align with typical PLC program size increments; hardware WP pin prevents accidental overwrite during runtime. |
Use Scenario: Central home automation hub managing Zigbee/Z-Wave/Thread radios, storing device profiles, network keys, and voice model assets. IC Role / Device Role / Timing Role: High-bandwidth firmware and asset storage; leverages 1-4-4 mode for rapid OTA image loading; uses SFDP v1.6 for automatic controller configuration. Use Value: 532 MB/s effective read speed accelerates boot and model loading; 3.6 V max rating simplifies power design with single 3.3 V LDO. |
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 mode and OTP registers; no UDPD (min 1 µA). | Acceptable for basic firmware storage without execute-in-place or cryptographic key binding. | Select when XiP and OTP are not required; verify SOIC-208 pinout match and SFDP parameter table compatibility. |
| Micron MT25QL80ABB8E12-0SIT | 8 Mbit, 1.7–2.0 V only (narrower range); supports 133 MHz quad I/O, SFDP v1.6, and deep power-down (1 µA), but no OTP or XiP. | Suitable for 1.8 V systems with strict voltage regulation; not viable for 3.3 V or battery-voltage-swing designs. | Choose only for fixed 1.8 V rail applications; incompatible with AT25FF081A-SSHN-B's wide-voltage and XiP use cases. |
Compared with W25Q80DVSSIG and MT25QL80ABB8E12-0SIT, the AT25FF081A-SSHN-B uniquely combines ultra-low-power UDPD, factory-programmed UID, three user OTP registers, and true XiP support - making it the sole option among these three for secure, battery-optimized, direct-execution embedded systems.
Availability
AT25FF081A-SSHN-B is available at Aetrix Electronics and suitable for IoT edge sensor nodes, wearable health monitors, industrial PLC modules, and smart home hub controllers requiring stable component supply across multi-year production cycles.
Supply support for AT25FF081A-SSHN-B 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 AT25FF081A belongs to Renesas' serial Flash memory product line, engineered specifically for ultra-low-power, secure, and high-reliability code+data storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range supported by the AT25FF081A-SSHN-B?
The AT25FF081A-SSHN-B operates across 1.65 V to 3.6 V, enabling direct integration with single-cell lithium batteries and standard 3.3 V or 2.5 V system rails. This wide range eliminates need for level shifters in mixed-voltage designs and maintains functionality during battery discharge down to 1.65 V - a key advantage over narrower-range alternatives like the Micron MT25QL80ABB8E12-0SIT.
Does the AT25FF081A-SSHN-B support execute-in-place (XiP) operation?
Yes, the AT25FF081A-SSHN-B fully supports XiP mode using 1-4-4 and 0-4-4 addressing protocols (commands EBh/E7h), allowing a host processor to execute code directly from Flash without copying to RAM. This reduces SRAM usage and boot latency - confirmed in Section 5.6 and Figure 15–17 of the DS-AT25FF081A-183 Rev.L datasheet.
How many One-Time Programmable (OTP) security registers does the AT25FF081A-SSHN-B include?
The AT25FF081A-SSHN-B includes four 128-byte OTP security registers: one factory-programmed unique identifier and three user-programmable registers (OTP0–OTP2). These are permanently locked after programming and used for secure boot key storage, device authentication, and firmware signing - detailed in Sections 1 (Product Overview) and 5.11 (OTP Security Register Lock).
What package type is used for the AT25FF081A-SSHN-B?
The AT25FF081A-SSHN-B uses an 8-lead EIAJ SOIC package (208-mil width), designated as "8S2" in Renesas documentation. This package matches JEDEC MS-012 mechanical dimensions and is pin-identical to standard 8-pin SOIC footprints - verified in Page 7 (Package Pinouts) and Table 39 (Ordering Codes) of DS-AT25FF081A-183 Rev.L.
What is the minimum deep power-down current for the AT25FF081A-SSHN-B?
The AT25FF081A-SSHN-B achieves 7 nA typical current in Ultra Deep Power-Down (UDPD) mode (command 79h), as specified in the Features section (Page 1) and Table 7 (Page 26) of DS-AT25FF081A-183 Rev.L. This enables multi-year operation on small batteries in always-listening edge devices, outperforming alternatives like Winbond W25Q80DVSSIG (1 µA DPD min).
AT25FF081A-SSHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 32µs, 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-SSHN-B FAQ
1.How can I place an order for AT25FF081A-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF081A-SSHN-B 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-SSHN-B reliable?
The price and inventory of AT25FF081A-SSHN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25FF081A-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25FF081A-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF081A-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF081A-SSHN-B?
AT25FF081A-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF081A-SSHN-B 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-SSHN-B?
For technical support, including AT25FF081A-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF081A-SSHN-B requirements.
6.How does Aetrix verify that AT25FF081A-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25FF081A-SSHN-B 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-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25FF081A-SSHN-B?
All AT25FF081A-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF081A-SSHN-B, 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-SSHN-B part is unused and in its original packaging.
Return procedure for AT25FF081A-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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