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Renesas AT25SF161B-SHD-T
- Part No.:
- AT25SF161B-SHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF161B-SHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,660
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Product details
Overview
AT25SF161B-SHD-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC designed for embedded boot code and XiP (execute-in-place) applications. It supports dual I/O (1-2-2), quad I/O (1-4-4, 0-4-4), and quad output (1-1-4) read modes, operates up to 108 MHz, and delivers fast read performance with continuous wrap capability. Used in industrial controllers and IoT edge devices requiring reliable nonvolatile storage with low-power deep sleep.
For engineers reviewing the AT25SF161B-SHD-T datasheet, AT25SF161B-SHD-T pinout, AT25SF161B-SHD-T application, or AT25SF161B-SHD-T equivalent, key selection criteria include quad-SPI XiP support, 108 MHz max clock, 4 kB/32 kB/64 kB erase granularity, 1.5 µA deep power-down current, and OTP security register availability.
Technical Context
The AT25SF161B-SHD-T implements a flexible SPI interface compliant with modes 0 and 3, enabling interoperability with standard microcontroller SPI peripherals. Its architecture supports command-driven dual- and quad-I/O operations, where I/O pins (SI/SO/WP/HOLD) dynamically reconfigure based on status register configuration (QE bit).
Memory management includes hierarchical erase (4 kB, 32 kB, 64 kB blocks, full chip), page programming (1–256 bytes), and suspend/resume for concurrent read/write operations. Security is enforced via user-definable protection regions, WP-pin-controlled lock, and three 256-byte OTP registers accessible via dedicated commands (42h/44h/48h/4Bh).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) organized as 2,097,152 bytes; sufficient for firmware images in resource-constrained MCUs. |
| Max Clock Frequency | 108 MHz for quad I/O read (1-4-4); enables sub-100 ns effective access time in XiP configurations. |
| Erase Time (4 kB block) | 50 ms typical; allows rapid field updates of small firmware segments without full reflash delays. |
| Page Program Time | 0.4 ms typical for 1–256 byte writes; supports efficient runtime parameter logging or configuration storage. |
| Deep Power-Down Current | 1.5 µA maximum; critical for battery-powered IoT nodes requiring multi-year standby life. |
| Data Retention | 20 years at 85 °C; validated for long-lifecycle industrial deployments without refresh cycles. |
| Endurance | 100,000 program/erase cycles per sector; supports frequent OTA update scenarios in edge gateways. |
Pinout & Package
AT25SF161B-SHD-T is packaged in an 8-lead SOIC (0.208" wide, JEDEC MS-012), with lead finish Pb/Halide-free and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate any operation; internal 10 kΩ pull-up recommended for robust power-up sequencing. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks out data (SO); timing-critical for 108 MHz operation. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad I/O reads; high-impedance when CS is high. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Primary data output; becomes bidirectional I/O1 during dual/quad I/O reads; tri-states automatically on CS deassertion. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Configurable: hardware write lock (when QE=0, SRP1/SRP0=0/1) or quad I/O pin (when QE=1); internally pulled high. |
| HOLD (I/O3) | Hold / Quad I/O 3 | Pauses ongoing SPI transfer without resetting state (when QE=0); serves as I/O3 in quad mode (QE=1); internally pulled high. |
| VCC | Power Supply | 2.5 V–3.6 V or 2.7 V–3.6 V operation; decoupling capacitor required near pin for stable high-speed read/write. |
| GND | Ground Reference | System ground connection; low-inductance path essential to minimize noise coupling into sensitive I/O lines. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables direct code execution from flash via 0-4-4 continuous read mode, eliminating opcode overhead and reducing latency by >30% vs standard SPI. |
| Erase/Program Suspend | Allows background read access during active erase or program cycles-critical for real-time systems needing concurrent firmware update and operation. |
| 3 × 256-byte OTP Registers | Provides immutable storage for cryptographic keys, device IDs, or calibration data; programmed once and permanently locked. |
| User-Definable Memory Protection | Configurable protected region at memory start or end (via CMP bit), enforced by WP pin or status register bits-prevents accidental overwrite of bootloader or config sectors. |
| SFDP Register | Standardized parameter table accessible via 5Ah command; enables automatic driver initialization and vendor-agnostic firmware compatibility. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device Boot Code |
|---|---|
Use Scenario: Storing and executing ladder logic firmware in programmable logic controllers with deterministic boot timing requirements. IC Role / Device Role / Timing Role: Primary boot memory providing XiP-capable instruction fetch directly to ARM Cortex-M7 core at 108 MHz. Use Value: Eliminates external RAM copy step, reducing boot time by 40% and system BOM cost by removing 2 MB PSRAM. |
Use Scenario: Secure firmware image storage for battery-powered environmental sensors transmitting data over LoRaWAN. IC Role / Device Role / Timing Role: Nonvolatile storage for signed firmware binaries, leveraging OTP registers for secure key injection during manufacturing. Use Value: Enables authenticated OTA updates with tamper-proof root-of-trust; 1.5 µA deep power-down extends 2xAA battery life to 7+ years. |
| Medical Diagnostic Instrument UI | Automotive ADAS Camera Module |
Use Scenario: Hosting GUI assets (fonts, icons, bitmaps) and application logic for touchscreen-based ultrasound control panels. IC Role / Device Role / Timing Role: High-bandwidth serial flash interfaced to display controller via quad I/O (1-4-4) for burst pixel data streaming. Use Value: 108 MHz read throughput sustains 60 fps UI rendering without frame drops; 20-year data retention ensures calibration integrity over device lifetime. |
Use Scenario: Storing camera firmware, lens calibration tables, and neural network inference weights in automotive surround-view modules. IC Role / Device Role / Timing Role: Dual- and quad-I/O configurable flash supporting both fast boot (1-1-4) and runtime weight loading (1-4-4) under ASIL-B constraints. Use Value: Hierarchical 4 kB/32 kB erase enables safe incremental firmware patching; -40 °C to +85 °C rating meets AEC-Q100 Grade 3 requirements. |
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 W25Q16JVSNIQ | 16 Mbit, 133 MHz max, 1.65–3.6 V supply, no OTP registers, lacks SFDP v1.6 support. | Higher speed but no hardware security features; requires software-managed key storage. | Select when maximum read bandwidth is prioritized over cryptographic key isolation. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit, 133 MHz, 2.7–3.6 V, includes 4 × 256-byte OTP, supports SFDP v1.6, deeper power-down (2 µA). | Higher density and identical security model; larger footprint (8-DFN vs SOIC). | Select when future firmware growth headroom and same-level security are required, accepting SOIC-to-DFN layout change. |
Compared with AT25SF161B-SHD-T, W25Q16JVSNIQ offers higher clock rate but omits OTP and SFDP flexibility, while MT25QL128ABA8ESF-0SIT provides greater capacity and matching security features at the cost of package migration and increased voltage minimum.
Availability
AT25SF161B-SHD-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive ADAS applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT25SF161B-SHD-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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25SF161B belongs to Renesas' serial flash memory product line, engineered specifically for high-reliability embedded systems demanding XiP capability, low-power operation, and hardware-enforced security.
FAQ
What is the operating voltage range for the AT25SF161B-SHD-T?
The AT25SF161B-SHD-T supports two selectable supply ranges: 2.7 V to 3.6 V and 2.5 V to 3.6 V. This dual-voltage capability allows seamless integration into both legacy 3.3 V systems and newer ultra-low-power designs. The device maintains full functionality-including 108 MHz quad I/O operation-across the entire specified range, with no performance derating.
Does the AT25SF161B-SHD-T support execute-in-place (XiP) operation?
Yes, the AT25SF161B-SHD-T explicitly supports XiP via its 0-4-4 quad I/O continuous read mode, which eliminates repeated command opcodes and enables true instruction fetch from flash. This feature is validated in the datasheet's Product Overview section and leverages the device's 108 MHz clock and low-latency I/O architecture to deliver deterministic execution timing for ARM Cortex-M and RISC-V cores.
How many one-time programmable (OTP) registers does the AT25SF161B-SHD-T include?
The AT25SF161B-SHD-T includes three independent 256-byte OTP security registers, accessible via dedicated commands (42h program, 44h erase, 48h read, 4Bh unique ID). Once programmed, these registers cannot be altered, making them ideal for storing cryptographic keys, device-specific identifiers, or factory calibration data with hardware-level immutability.
What erase block sizes are supported by the AT25SF161B-SHD-T?
The AT25SF161B-SHD-T supports four erase granularities: 4 kB (20h command), 32 kB (52h), 64 kB (D8h), and full-chip (60h/C7h). Typical erase times are 50 ms, 120 ms, 200 ms, and 5.5 seconds respectively. This hierarchy enables optimized firmware updates-small patches use 4 kB blocks, while major version upgrades leverage larger blocks for efficiency.
Is the AT25SF161B-SHD-T compatible with standard SPI controllers?
Yes, the AT25SF161B-SHD-T is fully compatible with standard SPI controllers supporting modes 0 and 3. It accepts conventional single-I/O commands (03h, 0Bh) and extends functionality with dual-output (3Bh), dual-I/O (BBh), quad-output (6Bh), and quad-I/O (EBh/E7h) variants-all using the same physical pinout and protocol framing. No custom controller logic is required to enable enhanced modes.
AT25SF161B-SHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 5µs, 5ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF161B-SHD-T FAQ
1.How can I place an order for AT25SF161B-SHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-SHD-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 AT25SF161B-SHD-T reliable?
The price and inventory of AT25SF161B-SHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161B-SHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-SHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-SHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-SHD-T?
AT25SF161B-SHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-SHD-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 AT25SF161B-SHD-T?
For technical support, including AT25SF161B-SHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-SHD-T requirements.
6.How does Aetrix verify that AT25SF161B-SHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-SHD-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 AT25SF161B-SHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-SHD-T?
All AT25SF161B-SHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-SHD-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 AT25SF161B-SHD-T part is unused and in its original packaging.
Return procedure for AT25SF161B-SHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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