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Renesas AT25EU0081A-SUN-B
- Part No.:
- AT25EU0081A-SUN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25EU0081A-SUN-B.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
AT25EU0081A-SUN-B from Renesas Electronics is an 8-Mbit ultra-low-energy serial NOR flash memory IC designed for battery-powered IoT edge devices. It operates across 1.65 V–3.6 V, supports SPI modes 0/3, delivers up to 108 MHz read speed, and enables quad I/O (1,1,4)/(1,4,4) operations for high-throughput firmware storage in constrained-power embedded systems.
For engineers reviewing the AT25EU0081A-SUN-B datasheet, AT25EU0081A-SUN-B pinout, AT25EU0081A-SUN-B application, or AT25EU0081A-SUN-B equivalent, key selection criteria include its 100 nA deep power-down current, 256-byte page erase capability, flexible 4/32/64 kB block architecture, software/hardware write protection with 3×512-byte OTP security registers, and JEDEC-compliant ID support for secure boot and firmware validation.
Technical Context
The AT25EU0081A-SUN-B implements a four-wire SPI interface with configurable dual- and quad-I/O modes enabled via the non-volatile Quad Enable (QE) bit in Status Register 2. Its flexible erase architecture delivers constant 8 ms typical erase times regardless of block size - whether 256-byte page, 4 kB, 32 kB, or full-chip erase - enabling efficient partial updates in resource-limited firmware environments.
It integrates three status registers (SR1/SR2/SR3) with independent protection schemes, including volatile/non-volatile lock bits and OTP-locked security registers. The device supports program/erase suspend/resume, hold functionality for SPI transaction pausing, and software reset - all while maintaining operation across –40 °C to +85 °C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1 Mbyte) NOR Flash with uniform 256-byte page architecture |
| Supply Voltage | 1.65 V–3.6 V - enables direct interfacing with 1.8 V and 3.3 V microcontrollers without level shifters |
| Max Clock Frequency | 108 MHz - supports fast read throughput up to 54 MB/s in quad I/O mode |
| Page Program Time | 2 ms typical - enables rapid firmware patching with minimal system latency |
| Deep Power-Down Current | 100 nA typical - extends battery life in always-on sensor nodes and wearable devices |
| Erase Endurance | 10,000 program/erase cycles - ensures long-term reliability for field-upgradable embedded applications |
| Data Retention | 20 years at +85 °C - meets industrial and automotive-grade data persistence requirements |
| Operating Temperature | –40 °C to +85 °C - qualified for deployment in uncontrolled environmental conditions |
Pinout & Package
AT25EU0081A-SUN-B is supplied in an 8-pin SOIC package (208-mil body width), with lead-free, RoHS-compliant finish. Pin assignments are identical across SOIC 150-mil, SOIC 208-mil, and UDFN variants per Renesas DS-AT25EU0081A-213 Rev. C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; falling edge initiates command sequence; internal pull-up ensures safe power-up state |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI/IO0), falling edge clocks output (SO/IO1) |
| SI (IO0) | Serial Input / Quad I/O 0 | Command/address/data input in standard/Dual/Quad SPI; bidirectional when QE=1 |
| SO (IO1) | Serial Output / Quad I/O 1 | Data output in standard/Dual SPI; bidirectional in Quad SPI when QE=1 |
| WP (IO2) | Write Protect / Quad I/O 2 | Hardware write-protection input when QE=0; becomes IO2 in Quad SPI mode (QE=1) |
| HOLD (IO3) | Hold / Quad I/O 3 | Pauses ongoing SPI transfer without resetting SCK; becomes IO3 in Quad SPI mode (QE=1) |
| VCC | Power Supply | 1.65–3.6 V supply; decoupling capacitor (100 nF–1 µF) required near pins for stable operation |
| GND | Ground | Reference return path for all signals and power; must be low-impedance connection to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Energy Operation | 100 nA deep power-down current and 1.1 mA active read current enable multi-year battery life in edge sensors |
| Flexible Erase Architecture | Simultaneous support for 256-byte page, 4/32/64 kB block, and full-chip erase - optimizes wear leveling and update granularity |
| Quad SPI Compatibility | JEDEC-standard (1,1,4)/(1,4,4) commands with non-volatile QE bit - eliminates external configuration overhead |
| Security Register Protection | Three 512-byte OTP-lockable security registers for storing cryptographic keys, calibration data, or device identity |
| Program/Erase Suspend | Allows real-time interrupt handling during background flash operations - critical for deterministic RTOS execution |
| Software/Hardware Write Protection | Combines WP pin control, SRP0/SRP1 bits, and top/bottom block selection for layered firmware integrity enforcement |
Applications
| Wireless Sensor Node Firmware Storage | Industrial PLC Configuration Memory |
|---|---|
|
Use Scenario: Storing firmware images and OTA update payloads in battery-powered LoRaWAN or NB-IoT end-nodes operating for >5 years on coin-cell batteries. IC Role / Device Role / Timing Role: External NOR flash providing XIP-capable code storage with 108 MHz quad-read access and 100 nA DPD current during sleep cycles. Use Value: Eliminates need for external voltage regulators or power-gating circuitry due to 1.65 V minimum supply and sub-µA quiescent draw. |
Use Scenario: Holding calibrated I/O mapping tables, safety logic parameters, and firmware revision metadata in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile configuration store with 10,000-cycle endurance and 20-year data retention under thermal cycling and EMI stress. Use Value: Prevents configuration loss during brownouts via hardware WP pin and OTP-locked security registers for critical safety parameters. |
| Medical Wearable Boot Memory | Automotive Telematics Secure Storage |
|
Use Scenario: Hosting bootloader and encrypted application binaries in FDA-classified wearable ECG monitors requiring secure, low-power persistent storage. IC Role / Device Role / Timing Role: Trusted boot source with JEDEC manufacturer/device ID and 128-bit unique serial number for device attestation. Use Value: Enables cryptographic binding of firmware to hardware identity while meeting ISO 13485 power budget constraints. |
Use Scenario: Storing vehicle VIN, calibration certificates, and OTA update manifests in 4G/5G telematics control units deployed in under-hood environments. IC Role / Device Role / Timing Role: Industrial-temperature flash with –40 °C to +85 °C operation and robust ESD immunity (±4 kV HBM) for automotive subsystems. Use Value: Guarantees firmware integrity across thermal shock and vibration via 10k-cycle endurance and page-erase granularity for incremental updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q80DVSSIG | 8 Mbit, 1.65–3.6 V, 104 MHz max, but lacks 256-byte page erase and OTP security registers | Supports basic quad SPI but no program/erase suspend or deep power-down below 1 µA | Select when cost sensitivity outweighs ultra-low-power and security requirements |
| Micron MT25QL80ABB8E12-0SIT | 8 Mbit, 1.7–2.0 V only, 133 MHz max, includes SFDP and octal DTR support not present in AT25EU0081A-SUN-B | Requires tighter voltage regulation; optimized for high-speed xSPI interfaces rather than legacy SPI microcontrollers | Select for next-gen MCU platforms with octal interface support and higher clock tolerance |
Compared with W25Q80DVSSIG and MT25QL80ABB8E12-0SIT, the AT25EU0081A-SUN-B uniquely balances ultra-low 100 nA deep power-down current, 256-byte page erase efficiency, and integrated OTP security registers - making it optimal for energy-constrained, security-aware edge deployments where voltage flexibility and firmware update agility are critical.
Availability
AT25EU0081A-SUN-B is available at Aetrix Electronics and suitable for wireless sensor networks, industrial PLCs, medical wearables, and automotive telematics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25EU0081A-SUN-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 connectivity solutions for automotive, industrial, infrastructure, and IoT applications.
The AT25EU0081A-SUN-B belongs to Renesas' ultra-low-energy serial flash product line, engineered specifically for battery-operated edge devices demanding minimal active and standby power without sacrificing SPI compatibility or data integrity.
FAQ
What is the maximum operating frequency supported by the AT25EU0081A-SUN-B?
The AT25EU0081A-SUN-B supports a maximum operating frequency of 108 MHz in quad I/O mode. This enables Fast Read Quad I/O (EBh) commands to achieve up to 54 MB/s effective throughput. The device maintains full functionality across its entire 1.65 V–3.6 V supply range at this speed, with AC timing validated per Table 24 and Table 25 of DS-AT25EU0081A-213 Rev. C. Performance remains stable across –40 °C to +85 °C.
Does the AT25EU0081A-SUN-B support both hardware and software write protection?
Yes, the AT25EU0081A-SUN-B supports dual-layer write protection: hardware protection via the WP pin (active-low, internally pulled high), and software protection using Status Register bits SRP0/SRP1 and the Quad Enable (QE) bit. It also provides three 512-byte security registers with one-time-programmable (OTP) lock capability. These features allow selective locking of boot sectors, configuration blocks, or cryptographic keys without affecting other memory regions.
What package type is used for the AT25EU0081A-SUN-B?
The AT25EU0081A-SUN-B is packaged in an 8-pin SOIC (208-mil) body with green, Pb/Halide-free, RoHS-compliant finish. This package matches the pinout and footprint of industry-standard 8-lead SOIC devices, ensuring drop-in compatibility with existing PCB layouts designed for similar serial flash components. Pin assignments are identical to those specified for SOIC 150-mil and UDFN variants in Section 2 of DS-AT25EU0081A-213 Rev. C.
Can the AT25EU0081A-SUN-B perform erase operations while the host processor is active?
Yes, the AT25EU0081A-SUN-B supports Program/Erase Suspend and Resume commands (D0h/B0h). When suspended, the device halts the internal erase cycle and allows the host to execute time-critical tasks - such as servicing interrupts or reading other memory regions - before resuming the operation. This capability is essential for real-time embedded systems where deterministic latency is required, and is confirmed in Sections 4.6 and 6.4 of the official datasheet.
What is the endurance and data retention specification for the AT25EU0081A-SUN-B?
The AT25EU0081A-SUN-B guarantees 10,000 program/erase cycles and 20 years of data retention at +85 °C. These specifications are measured per JEDEC standards and apply uniformly across all memory blocks, including pages and 4/32/64 kB blocks. The endurance rating reflects worst-case conditions and is validated across the full industrial temperature range (–40 °C to +85 °C), as stated in Section 1 and Table 19 of DS-AT25EU0081A-213 Rev. C.
AT25EU0081A-SUN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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:
- 100 MHz
- Write Cycle Time - Word, Page:
- 3ms, 3ms
- Access Time:
- 7 ns
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25EU0081A-SUN-B FAQ
1.How can I place an order for AT25EU0081A-SUN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25EU0081A-SUN-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 AT25EU0081A-SUN-B reliable?
The price and inventory of AT25EU0081A-SUN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25EU0081A-SUN-B is usually 5 days.
3.What payment methods are accepted for AT25EU0081A-SUN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25EU0081A-SUN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25EU0081A-SUN-B?
AT25EU0081A-SUN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25EU0081A-SUN-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 AT25EU0081A-SUN-B?
For technical support, including AT25EU0081A-SUN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25EU0081A-SUN-B requirements.
6.How does Aetrix verify that AT25EU0081A-SUN-B is sourced from the original manufacturer or authorized distributors?
All AT25EU0081A-SUN-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 AT25EU0081A-SUN-B meets industry standards.
7.What is the process for return or replacement of AT25EU0081A-SUN-B?
All AT25EU0081A-SUN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25EU0081A-SUN-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 AT25EU0081A-SUN-B part is unused and in its original packaging.
Return procedure for AT25EU0081A-SUN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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