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Renesas AT25SF161B-DWF
- Part No.:
- AT25SF161B-DWF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
AT25SF161B-DWF.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD WAFER
- Quantity:
- Payment:
- Shipping:
Inventory:1,570
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Product details
Overview
AT25SF161B-DWF from Renesas Electronics is a 16-Mbit SPI serial flash memory IC supporting dual I/O and quad I/O operations, 108 MHz max clock frequency, 2.5–3.6 V supply, and execute-in-place (XiP) capability for embedded boot and code storage. It delivers fast read performance via 1-4-4 and 0-4-4 command modes and integrates OTP security registers and SFDP support.
For engineers reviewing the AT25SF161B-DWF datasheet, AT25SF161B-DWF pinout, AT25SF161B-DWF application, or AT25SF161B-DWF equivalent, key selection criteria include quad-SPI XiP readiness, low-power deep power-down (1.5 µA), flexible 4/32/64 kB erase granularity, and industrial temperature operation (−40°C to +85°C).
Technical Context
The AT25SF161B-DWF implements a SPI-compatible interface with full support for modes 0 and 3, enabling interoperability with standard microcontroller SPI peripherals. Its architecture includes dedicated I/O0–I/O3 pins that dynamically reconfigure between control (WP/HOLD) and data roles based on Quad Enable (QE) bit state in Status Register 2.
It supports continuous read with wrap (8/16/32/64-byte), suspend/resume for program/erase operations, and hardware-based memory protection via user-definable protected regions controlled by SRP0/SRP1 bits and the WP pin. The device uses a 4 Mbit physical block structure optimized for mixed code/data storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) organized as 2,097,152 bytes; enables firmware storage for mid-complexity MCUs without external RAM dependency. |
| Max Clock Frequency | 108 MHz - enables high-throughput XiP execution and reduces instruction fetch latency in real-time systems. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full-chip - allows selective firmware updates and data logging partitioning without erasing entire image. |
| Program Time | 0.4 ms typical per page (1–256 bytes) - supports rapid field firmware patching and configuration writes. |
| Power Consumption | 15 µA standby / 1.5 µA deep power-down - extends battery life in always-on IoT edge nodes and portable devices. |
| Data Retention | 20 years - ensures long-term reliability for industrial controllers and automotive infotainment modules. |
| Endurance | 100,000 program/erase cycles - suitable for applications requiring frequent parameter or log updates. |
Pinout & Package
AT25SF161B-DWF is supplied in an 8-lead SOIC (0.208" wide, EIAJ standard) package. Pin functions are defined per JEDEC-compliant SPI serial flash interface with dual/quad I/O capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate commands and low-to-high to terminate operations; internal pull-up recommended. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI/I/O0), falling edge clocks output (SO/I/O1); timing-critical for 108 MHz operation. |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad read modes; high-impedance when CS deasserted. |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Standard output for single/dual reads; becomes bidirectional I/O1 in quad mode; tri-stated when CS high. |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Configurable: hardware write-protection when QE=0 and SRP=01; otherwise serves as I/O2 in quad commands; internally pulled high. |
| HOLD (I/O3) | Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state when QE=0; acts as I/O3 in quad mode; requires SCK low during edge transitions. |
| VCC | Power Supply | 2.5–3.6 V nominal; powers core logic and I/O buffers; decoupling capacitor required per layout guidelines. |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables 0-4-4 continuous read mode for zero-command-overhead code execution directly from flash, reducing MCU cache pressure. |
| Erase/Program Suspend | Allows background firmware update while servicing real-time interrupts-critical for safety-critical and deterministic systems. |
| 3 × 256-byte OTP Security Registers | Stores immutable keys, certificates, or calibration data; prevents tampering and supports secure boot chain integrity verification. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic access to device geometry, timing, and feature set-simplifies driver portability across flash families. |
| User-Definable Memory Protection | Configurable lock regions at memory start/end via status register bits; protects bootloader or configuration sectors from accidental overwrite. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing firmware images and runtime parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile program memory with execute-in-place (XiP) capability and robust erase/write endurance under thermal cycling. Use Value: Eliminates need for external RAM loading; 20-year data retention ensures long-term deployment without refresh; 100K cycle endurance supports field firmware upgrades. |
Use Scenario: Holding device-specific credentials, sensor calibration tables, and over-the-air (OTA) update staging area in battery-powered smart sensors. IC Role / Device Role / Timing Role: Secure, low-power configuration store with OTP registers for cryptographic keys and deep power-down for extended sleep intervals. Use Value: 1.5 µA deep power-down current extends multi-year battery life; 3×256-byte OTP prevents credential cloning; SFDP simplifies OTA driver compatibility. |
| Automotive Infotainment Bootloader | Medical Diagnostic Equipment Code Storage |
Use Scenario: Hosting primary bootloader and fail-safe recovery image in head unit ECUs requiring ASIL-B functional safety compliance. IC Role / Device Role / Timing Role: High-reliability boot memory with hardware write protection, fast 108 MHz read for rapid startup, and industrial temp range. Use Value: WP pin and SRP bits prevent unauthorized modification of critical boot code; 4 kB erase granularity isolates recovery image from main firmware updates. |
Use Scenario: Storing FDA-certified diagnostic algorithms and regulatory configuration profiles in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Certified non-volatile storage with traceable 20-year data retention, low-power operation, and memory protection for audit compliance. Use Value: Meets IEC 62304 data integrity requirements; OTP registers store device-unique identifiers for traceability; -40°C to +85°C rating supports clinical environment stability. |
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 W25Q16JW | 16 Mbit density, 133 MHz max clock, 1.65–3.6 V supply; lacks OTP registers and SFDP v1.6+ support. | Higher speed but wider voltage range; no built-in security registers limits secure boot use cases. | Select W25Q16JW only if 133 MHz read throughput is mandatory and OTP/SFDP are not required. |
| Macronix MX25L1633F | 16 Mbit, 104 MHz max clock, 2.7–3.6 V; supports dual/quad I/O but no continuous read (0-4-4) mode or erase suspend. | Lacks XiP-optimized continuous read and program/erase suspend-unsuitable for real-time interrupt servicing during updates. | Choose MX25L1633F where cost is prioritized over XiP performance and suspend capability. |
Compared with AT25SF161B-DWF, W25Q16JW offers higher clock speed but omits OTP and advanced SFDP, while MX25L1633F provides lower cost but sacrifices XiP efficiency and suspend functionality-making AT25SF161B-DWF optimal for secure, real-time embedded systems requiring both performance and reliability.
Availability
AT25SF161B-DWF is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node configuration, and automotive infotainment bootloader applications requiring stable component supply across multi-year production cycles.
Supply support for AT25SF161B-DWF 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 AT25SF161B-DWF belongs to Renesas' AT25SF serial flash product line, engineered specifically for high-reliability embedded systems needing XiP support, low-power operation, and integrated security features.
FAQ
What is the maximum operating frequency supported by the AT25SF161B-DWF?
The AT25SF161B-DWF supports a maximum SPI clock frequency of 108 MHz, validated across its full operating voltage (2.5–3.6 V) and temperature (−40°C to +85°C) range. This enables high-bandwidth read operations essential for execute-in-place (XiP) applications, where instruction fetch latency directly impacts system responsiveness. The AT25SF161B-DWF achieves this using optimized internal timing and quad I/O signaling.
Does the AT25SF161B-DWF support execute-in-place (XiP) functionality?
Yes, the AT25SF161B-DWF explicitly supports XiP through three key features: quad-SPI (1-4-4 and 0-4-4 command formats), continuous read mode that eliminates opcode overhead, and 108 MHz maximum clock rate. These allow a host MCU to fetch instructions directly from flash without copying to RAM, reducing memory footprint and boot time. The AT25SF161B-DWF datasheet confirms XiP suitability in its Product Overview section.
How many one-time programmable (OTP) security registers does the AT25SF161B-DWF include?
The AT25SF161B-DWF includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h/48h/44h). These registers are used to store immutable data such as cryptographic keys, device identifiers, or calibration constants. Once programmed, they cannot be erased or rewritten-ensuring persistent security for boot authentication and anti-cloning mechanisms in the AT25SF161B-DWF.
What package type is used for the AT25SF161B-DWF variant?
The AT25SF161B-DWF uses an 8-lead, 0.208-inch wide EIAJ SOIC package (also referenced as "208-mil Wide SOIC"). This package is RoHS-compliant, green, and compatible with standard surface-mount assembly processes. The "DWF" suffix in the part number explicitly denotes this wide-body SOIC variant, distinguishing it from narrow SOIC (DWF-T), DFN, or WLCSP versions of the AT25SF161B family.
Can the AT25SF161B-DWF suspend an ongoing erase or program operation?
Yes, the AT25SF161B-DWF supports program/erase suspend and resume functionality via commands 75h (suspend) and 7Ah (resume). This allows the host to temporarily halt a background erase or page program operation-such as during interrupt servicing-and later resume it without data loss. This capability is confirmed in Section 8.5–8.6 of the AT25SF161B-DWF datasheet and is critical for deterministic real-time systems.
AT25SF161B-DWF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Wafer
AT25SF161B-DWF FAQ
1.How can I place an order for AT25SF161B-DWF through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-DWF 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 AT25SF161B-DWF reliable?
The price and inventory of AT25SF161B-DWF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161B-DWF is usually 5 days.
3.What payment methods are accepted for AT25SF161B-DWF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-DWF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-DWF?
AT25SF161B-DWF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-DWF 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 AT25SF161B-DWF?
For technical support, including AT25SF161B-DWF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-DWF requirements.
6.How does Aetrix verify that AT25SF161B-DWF is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-DWF 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 AT25SF161B-DWF meets industry standards.
7.What is the process for return or replacement of AT25SF161B-DWF?
All AT25SF161B-DWF units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-DWF, 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 AT25SF161B-DWF part is unused and in its original packaging.
Return procedure for AT25SF161B-DWF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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