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Renesas AT25SF081B-MAHB-T
- Part No.:
- AT25SF081B-MAHB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT25SF081B-MAHB-T.pdf
- Description:
- IC FLASH 8MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:149,321
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Product details
Overview
AT25SF081B-MAHB-T from Renesas Electronics is an 8 M-bit SPI serial flash memory IC designed for embedded boot code storage and execute-in-place (XiP) applications. It supports dual I/O (1-2-2), quad I/O (1-4-4, 0-4-4), and standard SPI modes 0/3, operates up to 108 MHz, and delivers 0.4 ms typical page program time with 100,000 program/erase cycles endurance.
For engineers reviewing the AT25SF081B-MAHB-T datasheet, AT25SF081B-MAHB-T pinout, AT25SF081B-MAHB-T application, or AT25SF081B-MAHB-T equivalent, key selection criteria include XiP-read latency, quad-SPI command compatibility, flexible memory protection via WP pin and status register bits, and low-power deep power-down (1.2 µA typical) for battery-sensitive designs.
Technical Context
The AT25SF081B-MAHB-T implements a unified SPI interface supporting multiple read protocols-including fast read (03h/0Bh), dual-output (3Bh), dual-I/O (BBh), quad-output (6Bh), and quad-I/O (EBh/E7h)-with continuous read wrap (8/16/32/64-byte) to eliminate opcode overhead in XiP mode. Its internal architecture includes SRAM data buffer, Y/X-decoders, and control logic enabling concurrent erase-suspend/resume operations.
Memory protection is implemented via non-volatile status register bits (SRP0/SRP1/CMP) and hardware WP pin assertion, allowing user-definable protected regions at memory start or end. Security is enhanced by three 256-byte OTP registers accessible via dedicated commands (42h/44h/48h/4Bh) and SFDP register compliance for host auto-configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 M-bit (1 MByte) - sufficient for firmware images in microcontroller-based edge devices |
| Max Clock Frequency | 108 MHz - enables sub-100 ns effective read access in quad-I/O mode |
| Page Program Time | 0.4 ms typical - supports rapid field firmware updates without long blocking delays |
| Erase Granularity | 4 kB sector / 32 kB & 64 kB blocks / full chip - balances code/data partitioning flexibility |
| Endurance & Retention | 100,000 cycles / 20 years - meets industrial lifecycle requirements for unattended systems |
| Power Consumption | 13.3 µA standby / 1.2 µA deep power-down - extends battery life in always-on IoT nodes |
| Operating Voltage | 2.5 V–3.6 V - compatible with modern low-voltage SoCs and PMIC rails |
| Temperature Range | −40 °C to +85 °C - qualified for extended industrial ambient operation |
Pinout & Package
AT25SF081B-MAHB-T is packaged in an 8-pin Ultra-Thin UDFN (2 mm × 3 mm × 0.6 mm), RoHS-compliant, green package with wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high-to-low to initiate command sequence and low-to-high to terminate; internal pull-up not present - external 10 kΩ pull-up to VCC required for robust power-up |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output; timing-critical for all SPI modes including quad-I/O |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad operations; high-impedance when CS deasserted |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Primary data output; becomes bidirectional I/O1 in dual/quad modes; tri-states automatically on CS deassertion |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Hardware write lock for status registers when QE=0 and SRP=01; functions as I/O2 when QE=1 - pin role dynamically controlled by status register |
| HOLD (I/O3) | Communication Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state machine when QE=0; serves as I/O3 in quad commands when QE=1 - requires SCK low during edge transitions |
| VCC | Power Supply | 2.5–3.6 V supply; decoupling capacitor (≥100 nF) required within 5 mm of pin per datasheet layout guidelines |
| GND | Ground Reference | System ground return; must be connected to low-impedance PCB plane adjacent to VCC for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Execute-in-Place (XiP) | Enables direct CPU instruction fetch via 0-4-4 command eliminating opcode overhead and reducing read latency by >30% vs standard SPI |
| Erase/Program Suspend-Resume | Allows background erase or program to be paused for urgent reads, critical for real-time firmware update handlers |
| Three 256-byte OTP Security Registers | Provides immutable storage for keys, certificates, or device-unique identifiers - programmable only once per register |
| Serial Flash Discoverable Parameters (SFDP) | Enables host bootloader to auto-detect timing, voltage, and command set without hard-coded configuration |
| User-Definable Memory Protection | Configurable protected region at start or end of array via CMP bit; WP pin provides hardware-level lock for status register writes |
| Deep Power-Down Mode | Reduces current to 1.2 µA typical - essential for energy harvesting and coin-cell-powered sensor nodes |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Boot Memory |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with no external RAM. IC Role / Device Role / Timing Role: Primary boot memory and XiP execution source; delivers deterministic <100 ns read latency under 108 MHz quad-I/O. Use Value: Eliminates external RAM requirement and reduces BOM cost while maintaining real-time scan cycle timing. | Use Scenario: Hosting secure bootloader and OTA update image in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Dual-role storage for signed firmware images and runtime configuration; leverages OTP registers for key storage. Use Value: Enables authenticated firmware updates with tamper-resistant key storage and ultra-low deep power-down current. |
| Automotive Infotainment Display BIOS | Medical Wearable Device Configuration |
Use Scenario: Storing display initialization firmware and font assets in automotive head units requiring AEC-Q100 alignment. IC Role / Device Role / Timing Role: Non-volatile configuration and asset memory; uses continuous read wrap for burst pixel data transfers. Use Value: Reduces display initialization time by 40% vs standard SPI through 64-byte wrap and quad-I/O bandwidth. | Use Scenario: Holding calibrated sensor coefficients and patient-specific therapy parameters in Class II wearable monitors. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection; leverages WP pin and status register locking. Use Value: Prevents accidental or malicious overwrite of calibration data during field servicing or firmware updates. |
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 | Same density (8 Mbit), 104 MHz max clock, but lacks 0-4-4 XiP mode and SFDP support; uses different status register layout. | No native execute-in-place optimization; requires host-side command sequencing for burst reads. | Select when legacy SPI compatibility is prioritized over XiP latency and auto-configuration. |
| Micron MT25QL80ABB8E12-0SIT | Identical 8 Mbit density, 133 MHz max clock, supports 0-4-4 and SFDP; differs in OTP register count (1×512B vs 3×256B) and deep power-down current (2.5 µA vs 1.2 µA). | Better raw speed but higher leakage in sleep mode; OTP structure less granular for multi-key use cases. | Select when maximum read throughput is critical and ultra-low sleep current is secondary. |
Compared with W25Q80DVSSIG and MT25QL80ABB8E12-0SIT, the AT25SF081B-MAHB-T uniquely combines 0-4-4 XiP mode, SFDP v1.6 compliance, and lowest deep power-down current (1.2 µA), making it optimal for energy-constrained, latency-sensitive embedded boot applications.
Availability
AT25SF081B-MAHB-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge nodes, automotive infotainment systems, and medical wearables requiring stable component supply across multi-year production cycles.
Supply support for AT25SF081B-MAHB-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise markets.
The AT25SF081B product line targets cost-sensitive, high-reliability embedded systems needing fast, secure, low-power serial flash with advanced XiP and protection features - specifically optimized for resource-constrained edge devices.
FAQ
What is the maximum operating frequency supported by the AT25SF081B-MAHB-T?
The AT25SF081B-MAHB-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O (1-4-4) and quad-output (1-1-4) modes. This enables high-bandwidth data transfers essential for execute-in-place (XiP) applications where CPU fetch latency directly impacts system responsiveness. The 108 MHz rating is validated across the full −40 °C to +85 °C temperature range and 2.5–3.6 V supply voltage.
Does the AT25SF081B-MAHB-T support execute-in-place (XiP) operation?
Yes, the AT25SF081B-MAHB-T explicitly supports XiP via its 0-4-4 command mode, which eliminates opcode transmission overhead during continuous reads. This allows the host processor to fetch instructions directly from flash with minimal latency. The device's 108 MHz quad-I/O capability, continuous read wrap (up to 64 bytes), and fast page program time (0.4 ms typical) collectively optimize it for reliable XiP deployment in microcontroller-based systems.
How does memory protection work on the AT25SF081B-MAHB-T?
Memory protection on the AT25SF081B-MAHB-T is implemented through two complementary mechanisms: software-configurable status register bits (SRP0/SRP1/CMP) that define protected regions at the start or end of the memory array, and hardware-level write protection via the WP pin. When SRP0=0 and SRP1=1, asserting WP low locks status register writes. Protection granularity ranges from individual sectors (4 kB) to full chip, and both volatile and non-volatile settings are supported.
What package type is used for the AT25SF081B-MAHB-T?
The AT25SF081B-MAHB-T uses an 8-pad Ultra-Thin UDFN package measuring 2 mm × 3 mm × 0.6 mm, with wettable flanks for automated optical inspection. This compact, RoHS-compliant footprint supports high-density PCB layouts in space-constrained applications such as wearables and IoT sensors. Pinout matches industry-standard 8-lead SOIC but with significantly reduced board area and thermal resistance.
Can the AT25SF081B-MAHB-T suspend an erase or program operation?
Yes, the AT25SF081B-MAHB-T supports erase/program suspend and resume functionality via dedicated 75h and 7Ah commands. This allows a pending erase or program operation to be temporarily halted - for example, to service a high-priority read request - and later resumed without data corruption or timing loss. The feature is especially valuable in real-time systems where deterministic interrupt response must be maintained during firmware updates.
AT25SF081B-MAHB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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:
- 108 MHz
- Write Cycle Time - Word, Page:
- 50µs, 2.4ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT25SF081B-MAHB-T FAQ
1.How can I place an order for AT25SF081B-MAHB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF081B-MAHB-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 AT25SF081B-MAHB-T reliable?
The price and inventory of AT25SF081B-MAHB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF081B-MAHB-T is usually 5 days.
3.What payment methods are accepted for AT25SF081B-MAHB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF081B-MAHB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF081B-MAHB-T?
AT25SF081B-MAHB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF081B-MAHB-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 AT25SF081B-MAHB-T?
For technical support, including AT25SF081B-MAHB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF081B-MAHB-T requirements.
6.How does Aetrix verify that AT25SF081B-MAHB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF081B-MAHB-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 AT25SF081B-MAHB-T meets industry standards.
7.What is the process for return or replacement of AT25SF081B-MAHB-T?
All AT25SF081B-MAHB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF081B-MAHB-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 AT25SF081B-MAHB-T part is unused and in its original packaging.
Return procedure for AT25SF081B-MAHB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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