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Renesas AT25XE081D-UUN-T
- Part No.:
- AT25XE081D-UUN-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-XFBGA, WLCSP
- Datasheet:
-
AT25XE081D-UUN-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,338
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Product details
Overview
AT25XE081D-UUN-T 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 from 1.65 V to 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 -40°C to +85°C industrial temperature range - deployed in embedded boot code storage and firmware update systems.
For engineers reviewing the AT25XE081D-UUN-T datasheet, AT25XE081D-UUN-T pinout, AT25XE081D-UUN-T application, or AT25XE081D-UUN-T equivalent, key selection criteria include multi-I/O timing compatibility, ultra-low-power deep power-down modes (5–7 nA), OTP security register support, RMW command for SRAM-like writes, and JEDEC-standard SFDP compliance for automated configuration.
Technical Context
The AT25XE081D-UUN-T implements a dual-mode SPI interface with hardware support for standard (1-1-1), dual-output (1-1-2), quad-output (1-1-4), quad I/O (1-4-4), and XiP (0-4-4) transfer protocols. Its internal architecture integrates an 8-Mbit Flash array, 256-byte SRAM buffer, and I/O Interface Unit dynamically reconfigured per command mode.
Memory protection is enforced via individual block lock/unlock commands (36h/39h), global lock (7Eh), and user-definable protected regions at memory start/end. Status registers (SR1–SR6) are non-volatile/volatile configurable, with dedicated lock bits (6Fh) and indirect access capability for secure register updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1,048,576 bytes) - supports full firmware images for microcontrollers with ≤1 MB code footprint. |
| Supply Voltage Range | 1.65 V – 3.6 V - enables direct integration into single-supply battery-powered systems without level-shifting. |
| Max Read Frequency | 133 MHz in 1-4-4 mode - achieves ~66.5 MB/s effective throughput for XiP execution latency reduction. |
| Erase Granularity | 256-byte page erase - minimizes write latency for data logging and parameter storage without full-block overhead. |
| Endurance & Retention | 100,000 program/erase cycles / 20-year data retention - validated for long-life industrial firmware update cycles. |
| Ultra-Low Power Modes | 5–7 nA Ultra Deep Power Down current - extends battery life in always-on IoT edge nodes during extended sleep. |
| Security Features | 3 × 128-byte OTP security registers + factory-programmed 128-byte UID - enables device authentication and secure key binding. |
Pinout & Package
AT25XE081D-UUN-T is supplied in an 8-lead SOIC (208-mil) package per ordering code UUN-T. Pin functions are standardized across all supported packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command decoding; must be asserted before SCK edge to initiate valid transfers. |
| SCK | Serial Clock | Input clock synchronizing all SPI data transfers; supports up to 133 MHz in quad I/O mode. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary data input in standard/dual modes; becomes bidirectional I/O0 in quad I/O/XiP operation. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Primary data output in standard/dual modes; becomes bidirectional I/O1 in quad I/O/XiP operation. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write protection when held low; serves as I/O2 in quad I/O/XiP modes. |
| HOLD/RESET (I/O3) | Hold Input / Reset Function / Quad I/O Lane 3 | Pauses ongoing transfers when low; triggers hardware reset per JEDEC standard; acts as I/O3 in quad modes. |
| VCC | Power Supply | 1.65–3.6 V supply; decoupling capacitor required per datasheet layout guidelines. |
| GND | Ground | Reference return path for all I/O and core logic; must be connected to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Read-Modify-Write (RMW) Command (0Ah) | Emulates byte-level SRAM writes in a single SPI transaction - eliminates need for external RAM buffering during parameter updates. |
| Active Status Interrupt (25h) | Generates host interrupt on RDY/BSY bit clear - enables asynchronous polling-free firmware flow control during erase/program operations. |
| Quad I/O and XiP Support (1-4-4 / 0-4-4) | Enables continuous high-speed code fetch directly from flash - reduces boot time and external memory cost in resource-constrained MCUs. |
| Erase/Program Suspend & Resume (75h/B0h, 7Ah/D0h) | Allows background erase/program to pause for urgent host reads - critical for real-time data logging during firmware updates. |
| User-Configurable I/O Drive Strength | Adjusts output drive for signal integrity optimization across varying trace lengths and capacitive loads - improves noise margin in dense PCB layouts. |
Applications
| Boot Code Storage | Firmware Over-the-Air (OTA) Updates |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M or RISC-V microcontrollers requiring cold-start execution. IC Role / Device Role / Timing Role: Primary non-volatile program memory accessed via SPI during power-on reset sequence. Use Value: 133 MHz quad I/O read speed and XiP support reduce boot latency by >40% vs. standard SPI flash, enabling sub-100 ms startup. | Use Scenario: Receiving encrypted firmware patches over BLE/Wi-Fi and writing them to persistent storage before validation and activation. IC Role / Device Role / Timing Role: Secure, field-updatable code repository with atomic page programming and 256-byte granularity. Use Value: Page erase (256 B) and RMW command allow partial image updates without full chip erase - preserving runtime configuration during patch deployment. |
| Data Logging in Edge Sensors | Secure Key Storage for IoT Devices |
Use Scenario: Recording timestamped sensor readings (temperature, humidity, motion) in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power persistent data buffer supporting frequent small writes with minimal energy overhead. Use Value: 5–7 nA Ultra Deep Power Down current extends 10-year battery life in devices logging every 5 minutes. | Use Scenario: Storing cryptographic keys, certificates, and device identity credentials in smart meters and industrial gateways. IC Role / Device Role / Timing Role: Tamper-resistant non-volatile storage with OTP lock and factory UID for root-of-trust establishment. Use Value: Three 128-byte OTP registers permanently store keys post-provisioning - preventing extraction or overwrite after initial programming. |
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 RMW command and active status interrupt. | No native SRAM-emulation write; requires host-side buffering for byte updates. | Select when cost sensitivity outweighs advanced write efficiency features. |
| Micron MT25QL80ABB8E12-0SIT | 8-Mbit, 1.7–2.0 V only; supports 133 MHz quad I/O and SFDP but no OTP security registers or UDPD mode. | Not suitable for wide-voltage or ultra-low-power battery designs; limited security provisioning capability. | Choose for high-reliability automotive applications where narrow VCC range is acceptable. |
Compared with W25Q80DVSSIG and MT25QL80ABB8E12-0SIT, the AT25XE081D-UUN-T uniquely combines ultra-deep power-down (5–7 nA), RMW command, and three OTP registers - making it optimal for battery-constrained, security-aware, and real-time update-capable embedded systems.
Availability
AT25XE081D-UUN-T is available at Aetrix Electronics and suitable for industrial control systems, IoT edge node deployments, and medical diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT25XE081D-UUN-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT markets.
The AT25XE081D belongs to Renesas' high-performance serial flash product line, engineered for low-voltage operation, multi-I/O flexibility, and embedded security - targeting next-generation resource-constrained edge devices.
FAQ
What voltage range does the AT25XE081D-UUN-T support, and why is this important?
The AT25XE081D-UUN-T supports 1.65 V to 3.6 V, enabling direct use across single-cell Li-ion (3.0–3.6 V), coin-cell (1.8–3.0 V), and 1.8 V logic systems without voltage translation. This wide range simplifies power architecture in portable and battery-operated designs while maintaining full functionality including 133 MHz quad I/O operation - a key differentiator versus narrower-range alternatives like the Micron MT25QL80ABB8E12-0SIT.
Does the AT25XE081D-UUN-T support execute-in-place (XiP), and how is it implemented?
Yes, the AT25XE081D-UUN-T supports XiP via 0-4-4 command format, eliminating opcode transmission after initial setup for continuous high-speed reads. This mode leverages quad I/O lanes and internal burst wrap logic to sustain up to 133 MHz clock rates, reducing instruction fetch latency by up to 75% compared to standard SPI - critical for deterministic real-time execution in Cortex-M4/M7-based systems using the AT25XE081D-UUN-T as primary code memory.
How does the Read-Modify-Write (RMW) command (0Ah) function in the AT25XE081D-UUN-T?
The RMW command (0Ah) in the AT25XE081D-UUN-T performs a complete read-modify-write cycle in one SPI transaction: it reads a target byte, modifies specified bits using mask logic, and writes back - all without host-side buffering. This emulates true SRAM write behavior, eliminating the need for external RAM or complex software workarounds during parameter updates, and is confirmed in Section 4.16 and Table 21 of the AT25XE081D-UUN-T datasheet.
What security features does the AT25XE081D-UUN-T provide beyond basic write protection?
Beyond WP pin and status register lock, the AT25XE081D-UUN-T provides three 128-byte One-Time Programmable (OTP) security registers, a factory-programmed 128-byte unique identifier, and individual/global block lock commands (36h/7Eh). These features enable cryptographic key binding, device identity attestation, and immutable firmware signing - verified in Sections 4.11, 6.26, and Table 27–30 of the AT25XE081D-UUN-T datasheet.
What are the ultra-low-power consumption modes of the AT25XE081D-UUN-T, and how are they entered?
The AT25XE081D-UUN-T offers Deep Power-Down (B9h, 8.5 µA) and Ultra Deep Power-Down (79h, 5–7 nA) modes. Both are entered via dedicated SPI commands and exited using ABh with device ID verification. These modes are validated across -40°C to +85°C and are essential for extending battery life in always-on sensors - detailed in Sections 4.9, Tables 7–8, and Figure 27–29 of the AT25XE081D-UUN-T datasheet.
AT25XE081D-UUN-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-XFBGA, WLCSP
- 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:
- 1M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 4ms, 30ms
- 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-WLCSP (1.77x1.74)
AT25XE081D-UUN-T FAQ
1.How can I place an order for AT25XE081D-UUN-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25XE081D-UUN-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 AT25XE081D-UUN-T reliable?
The price and inventory of AT25XE081D-UUN-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25XE081D-UUN-T is usually 5 days.
3.What payment methods are accepted for AT25XE081D-UUN-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25XE081D-UUN-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25XE081D-UUN-T?
AT25XE081D-UUN-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25XE081D-UUN-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 AT25XE081D-UUN-T?
For technical support, including AT25XE081D-UUN-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25XE081D-UUN-T requirements.
6.How does Aetrix verify that AT25XE081D-UUN-T is sourced from the original manufacturer or authorized distributors?
All AT25XE081D-UUN-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 AT25XE081D-UUN-T meets industry standards.
7.What is the process for return or replacement of AT25XE081D-UUN-T?
All AT25XE081D-UUN-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25XE081D-UUN-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 AT25XE081D-UUN-T part is unused and in its original packaging.
Return procedure for AT25XE081D-UUN-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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