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Renesas AT25XE081D-SSHN-B
- Part No.:
- AT25XE081D-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25XE081D-SSHN-B.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,441
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Product details
Overview
AT25XE081D-SSHN-B from Renesas Electronics is an 8-Mbit SPI serial flash memory IC supporting quad I/O, XiP (eXecute-in-Place), and flexible erase architecture. It operates across 1.65 V–3.6 V, delivers up to 133 MHz read frequency in 1-4-4 mode, and features 256-byte page erase, 100,000 program/erase cycles, and ultra-low 5–7 nA Ultra Deep Power-Down current. It serves as non-volatile program/data storage in battery-powered embedded systems requiring fast code execution and field-updatable firmware.
For engineers reviewing the AT25XE081D-SSHN-B datasheet, AT25XE081D-SSHN-B pinout, AT25XE081D-SSHN-B application, or AT25XE081D-SSHN-B equivalent, key selection considerations include multi-I/O timing compatibility (1-1-2/1-1-4/1-4-4/0-4-4), SRAM-emulating Read-Modify-Write command (0Ah), active status interrupt (25h), OTP security register support, and JEDEC SFDP compliance for automatic configuration.
Technical Context
The AT25XE081D-SSHN-B implements a dual-mode SPI interface with hardware-selectable HOLD/RESET functionality and supports nested erase/program suspend-resume operations. Its internal 256-byte SRAM buffer enables high-efficiency page programming and buffer-to-memory transfers without prior erase.
Memory architecture includes six configurable status registers (SR1–SR6), individual block lock/unlock commands (36h/39h), global protection (7Eh/98h), and four 128-byte OTP security registers-three user-programmable and one factory-unique ID. Power management integrates Deep Power-Down (B9h) and Ultra Deep Power-Down (79h) with sub-10 nA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 bytes) - sufficient for boot code, firmware images, and parameter storage in compact MCU-based designs. |
| Supply Voltage Range | 1.65 V – 3.6 V - enables direct interfacing with 1.8 V and 3.3 V logic domains without level shifting. |
| Max Clock Frequency | 133 MHz in 1-4-4 quad I/O mode - achieves ~66.5 MB/s effective read bandwidth for XiP latency-critical applications. |
| Erase Granularity | 256-byte page erase - minimizes write latency and wear when updating small configuration or logging data blocks. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - validated for industrial-grade field updates and long-life deployments. |
| Ultra Low Power | 5–7 nA Ultra Deep Power-Down current - extends battery life in always-on sensor nodes and IoT endpoints. |
| Security Features | 3 × 128-byte OTP registers + 1 × 128-byte factory UID - supports secure boot key storage and device identity binding. |
Pinout & Package
AT25XE081D-SSHN-B is supplied in an 8-lead SOIC (150-mil) package per JEDEC MS-012, with gull-wing leads, Pb/Halide-free, RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command initiation; must remain asserted during full command sequence including dummy clocks. |
| SCK | Serial Clock | Input clock synchronizing all SPI transfers; supports up to 133 MHz in quad I/O modes with precise setup/hold timing. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary data input in standard SPI; functions as bidirectional I/O0 in dual/quad modes for command/address/data transfer. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Primary data output in standard SPI; functions as bidirectional I/O1 in dual/quad modes; supports continuous read in 0-4-4 mode. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write protection when low; also serves as I/O2 in quad I/O modes for expanded data bus width. |
| HOLD/RESET (I/O3) | Hold Input or Hardware Reset | Pauses ongoing SPI transfer when pulled low; alternatively triggers JEDEC-standard hardware reset when asserted for ≥20 µs. |
| VCC | Power Supply | 1.65–3.6 V core supply; decoupling capacitor required per datasheet layout guidelines to maintain stable operation at max frequency. |
| GND | Ground | Reference return path for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling into I/O lines. |
Key Features
| Feature | Design Value |
|---|---|
| Read-Modify-Write (RMW) Command (0Ah) | Emulates SRAM-style byte writes in a single SPI transaction-eliminates need for read-erase-program sequences during small-data updates. |
| Active Status Interrupt (25h) | Asserts host interrupt upon RDY/BSY bit clear-enables event-driven polling reduction and deterministic timing for real-time firmware updates. |
| Quad I/O & XiP Support (1-4-4 / 0-4-4) | Enables direct code execution from flash with zero-command overhead after initial address setup-reduces CPU wait states and improves boot speed. |
| Erase/Program Suspend-Resume | Allows background erase or program to be paused for higher-priority host access-critical for concurrent firmware update and system operation. |
| User-Configurable I/O Drive Strength | Adjustable output drive on all I/O pins-optimizes signal integrity across varying trace lengths and load capacitances without external termination. |
| Serial Flash Discoverable Parameters (SFDP) | JEDEC-standard parameter table accessible via 5Ah command-enables automatic driver initialization and runtime configuration detection. |
Applications
| Industrial PLC Firmware Storage | Wearable Health Sensor Data Logging |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware and calibration tables in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Non-volatile program memory with XiP capability and 256-byte page erase for incremental firmware patches. Use Value: Enables field-upgradable control logic without full reflash; 100K endurance ensures >10 years of daily patch cycles at industrial duty cycles. |
Use Scenario: Capturing ECG waveform snapshots and device configuration in battery-powered wearable medical sensors. IC Role / Device Role / Timing Role: Low-power data logger with RMW command for timestamped parameter updates and ultra-deep power-down between measurements. Use Value: 5–7 nA UDPD current extends coin-cell battery life to >2 years; 256-byte page granularity minimizes write energy per log entry. |
| Smart Home Gateway Boot Memory | Automotive Telematics OTA Module |
|
Use Scenario: Hosting bootloader and Linux kernel image in Wi-Fi/Zigbee gateways requiring secure, fast boot and remote firmware validation. IC Role / Device Role / Timing Role: Secure boot storage with factory-programmed UID and three OTP registers for cryptographic key binding. Use Value: Prevents unauthorized firmware replacement; 133 MHz quad read enables sub-100 ms kernel load time from cold start. |
Use Scenario: Storing cellular modem firmware and vehicle diagnostic logs in automotive telematics control units (TCUs) with ASIL-B readiness. IC Role / Device Role / Timing Role: AEC-Q100 qualified (per Renesas product family) non-volatile memory supporting dual-bank firmware update with suspend/resume. Use Value: Nested erase/program suspend allows safe over-the-air updates while maintaining CAN bus responsiveness and real-time diagnostics. |
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 SPI flash with 104 MHz max clock (1-1-1), no 1-4-4 or 0-4-4 XiP mode; lacks RMW command and OTP registers. | Supports basic boot storage but not true eXecute-in-Place or secure key storage; lower power-down current (1 µA DPD) but no UDPD. | Select when cost sensitivity outweighs XiP performance and security requirements; verify absence of RMW impact on data logging efficiency. |
| Micron MT25QL80BA8ESF-0SIT | 8-Mbit quad SPI flash with 133 MHz 1-4-4, SFDP, and 256-byte page erase; includes 128-bit unique ID but no OTP security registers. | Matches AT25XE081D-SSHN-B in XiP and low-power operation but omits dedicated OTP space for customer keys or certificates. | Prefer for high-speed code execution where cryptographic key separation is handled externally; confirm lack of OTP does not compromise secure boot architecture. |
Compared with W25Q80DVSSIG and MT25QL80BA8ESF-0SIT, the AT25XE081D-SSHN-B uniquely combines 133 MHz XiP, SRAM-emulating RMW, three OTP registers, and 5–7 nA UDPD-making it optimal for secure, battery-constrained, real-time firmware update scenarios where both performance and tamper-resistant storage are mandatory.
Availability
AT25XE081D-SSHN-B is available at Aetrix Electronics and suitable for industrial automation firmware storage, wearable health sensor data logging, smart home gateway boot memory, and automotive telematics OTA modules requiring stable component supply and long-term lifecycle support.
Supply support for AT25XE081D-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 AT25XE081D belongs to Renesas' AT25XE family of high-performance, low-voltage serial flash memories engineered for battery-operated devices, secure firmware storage, and real-time XiP execution in resource-constrained embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the AT25XE081D-SSHN-B in quad I/O mode?
The AT25XE081D-SSHN-B supports up to 133 MHz in 1-4-4 quad I/O mode, enabling approximately 66.5 MB/s effective read throughput. This frequency is specified under VCC = 1.65–3.6 V and TA = -40°C to +85°C conditions, with strict AC timing requirements for setup/hold on I/O lines. The AT25XE081D-SSHN-B must be configured for quad I/O operation using appropriate status register settings before issuing 1-4-4 commands.
Does the AT25XE081D-SSHN-B support true eXecute-in-Place (XiP) operation?
Yes, the AT25XE081D-SSHN-B supports true XiP via its 0-4-4 command format, which eliminates opcode transmission after the initial address setup-reducing instruction fetch latency. This mode requires proper configuration of the Continuous Read Enable bit (CRB) in Status Register 2 and is validated for use with compatible host processors that support quad I/O address/data streaming. The AT25XE081D-SSHN-B's 133 MHz max clock and low-latency read architecture make it suitable for real-time XiP applications.
How does the Read-Modify-Write (RMW) command (0Ah) function in the AT25XE081D-SSHN-B?
The AT25XE081D-SSHN-B implements the RMW command (0Ah) to emulate SRAM-like byte-level writes without requiring a prior read-erase-program sequence. Internally, it reads the target page into the 256-byte SRAM buffer, modifies the specified byte(s), erases the page, and reprograms it-all within a single command. This reduces write latency and flash wear for small-data updates such as configuration flags or timestamps, and is especially valuable in data-logging and parameter-storage applications.
What security features does the AT25XE081D-SSHN-B provide beyond standard write protection?
Beyond software/hardware write protection, the AT25XE081D-SSHN-B provides three 128-byte One-Time Programmable (OTP) security registers and one factory-programmed 128-byte unique identifier. OTP registers can store cryptographic keys, certificates, or device-specific secrets and are permanently locked after programming. The AT25XE081D-SSHN-B also supports individual block locking, global protection, and status register locking (6Fh) to prevent unauthorized configuration changes-enabling robust secure boot and firmware authentication architectures.
What power-saving modes are available on the AT25XE081D-SSHN-B, and what are their typical current draws?
The AT25XE081D-SSHN-B offers three low-power states: Standby (30 µA typical), Deep Power-Down (DPD, 8.5 µA typical), and Ultra Deep Power-Down (UDPD, 5–7 nA typical). DPD and UDPD are entered via B9h and 79h commands respectively, and exited using ABh with device ID verification. These modes are critical for battery-powered applications like wearables and remote sensors, where the AT25XE081D-SSHN-B's sub-10 nA UDPD current directly extends operational lifetime without compromising wake-up responsiveness.
AT25XE081D-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:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 32µs, 6.5ms
- 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
AT25XE081D-SSHN-B FAQ
1.How can I place an order for AT25XE081D-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE081D-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 AT25XE081D-SSHN-B reliable?
The price and inventory of AT25XE081D-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 AT25XE081D-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25XE081D-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE081D-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE081D-SSHN-B?
AT25XE081D-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE081D-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 AT25XE081D-SSHN-B?
For technical support, including AT25XE081D-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE081D-SSHN-B requirements.
6.How does Aetrix verify that AT25XE081D-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25XE081D-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 AT25XE081D-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25XE081D-SSHN-B?
All AT25XE081D-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE081D-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 AT25XE081D-SSHN-B part is unused and in its original packaging.
Return procedure for AT25XE081D-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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