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Renesas AT25SF161-SSHD-B
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- Part No.:
- AT25SF161-SSHD-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF161-SSHD-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,297
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Product details
Overview
AT25SF161-SSHD-B 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 standard SPI modes 0/3, operates up to 108 MHz, and delivers fast read performance with continuous wrap modes. Its 4 kB/32 kB/64 kB flexible erase architecture and 100,000 P/E cycles enable reliable firmware storage in industrial controllers and IoT edge devices.
For engineers reviewing the AT25SF161-SSHD-B datasheet, AT25SF161-SSHD-B pinout, AT25SF161-SSHD-B application, or AT25SF161-SSHD-B equivalent, key selection criteria include quad-SPI timing compliance, deep power-down current (≤1.5 µA), OTP security register support, and SOIC-8 narrow-body package compatibility with legacy PCB footprints.
Technical Context
The AT25SF161-SSHD-B implements a unified SPI interface supporting command-set backward compatibility while enabling high-speed XiP via 0-4-4 continuous read mode - eliminating opcode retransmission overhead. Its internal SRAM data buffer and Y-gating architecture optimize burst throughput across all supported protocols (1-1-2, 1-2-2, 1-1-4, 1-4-4).
Memory protection is enforced through non-volatile status register bits (SRP0/SRP1) and hardware WP pin control, while three 256-byte OTP security registers provide immutable device identity and secure boot key storage. Erase/program suspend-resume capability enables real-time host arbitration during background operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) organized as 2,097,152 bytes; sufficient for full MCU boot images and configuration data. |
| Max Clock Frequency | 108 MHz - enables ≤9.3 ns per bit in quad I/O mode, critical for low-latency XiP execution. |
| Erase Time (4 kB block) | 50 ms typical - allows rapid field firmware updates without system downtime. |
| Page Program Time | 0.4 ms typical for 1–256 byte writes - supports fine-grained parameter logging and OTA patching. |
| Deep Power-Down Current | 1.5 µA maximum - extends battery life in always-on sensor nodes and wearable devices. |
| Data Retention | 20 years at 85°C - meets automotive and industrial long-life deployment requirements. |
| Endurance | 100,000 program/erase cycles - ensures robustness for frequent configuration updates. |
Pinout & Package
AT25SF161-SSHD-B uses an 8-lead SOIC (0.150" narrow body) package with industry-standard pinout and JEDEC-compliant footprint. All pins support 3.3 V logic levels and tolerate 2.5 V–3.6 V supply operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high-to-low to initiate commands and low-to-high to terminate operations. |
| SCK | Serial Clock | Input clock; rising edge latches SI data, falling edge clocks SO data - defines SPI timing boundary. |
| SI (I/O0) | Serial Input / Quad I/O 0 | Primary command/address/data input; becomes bidirectional I/O0 in dual/quad modes for parallel bit transfer. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Primary data output; functions as I/O1 in dual/quad modes to double/quad data bandwidth per clock cycle. |
| WP (I/O2) | Write Protect / Quad I/O 2 | Hardware write lock for status registers when QE=0; repurposed as I/O2 in quad-SPI mode (QE=1). |
| HOLD (I/O3) | Hold / Quad I/O 3 | Pauses ongoing SPI transfer without resetting state; becomes I/O3 in quad-SPI mode for full 4-bit I/O bus. |
| VCC | Power Supply | 2.5 V–3.6 V single supply; supports both 2.7 V and 2.5 V minimum variants per datasheet options. |
| GND | Ground Reference | System ground return path; requires low-impedance connection to minimize noise coupling into SPI signals. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O (1-4-4) & Continuous Read (0-4-4) | Enables true execute-in-place (XiP) with zero command overhead per burst, reducing CPU wait states by >40% vs standard SPI reads. |
| 3 × 256-byte OTP Security Registers | Provides tamper-resistant storage for unique device ID, cryptographic keys, or secure boot manifests - unalterable after programming. |
| Erase/Program Suspend-Resume | Allows host CPU to interrupt background flash operations (e.g., during real-time interrupt handling) and resume without data loss or timeout risk. |
| User-Definable Memory Protection | Configurable protected zones at memory start/end via status register bits, enabling bootloader lockdown independent of application firmware partitioning. |
| SFDP Register Support | Standardized parameter discovery enables automatic driver initialization and runtime configuration without hard-coded timing constants. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Primary boot memory accessed at power-up via XiP; executes control logic directly from flash without RAM load delay. Use Value: 20-year data retention and 100,000 P/E cycles ensure firmware integrity over 15+ year product lifecycles without field replacement. |
Use Scenario: Hosting secure boot loader and OTA update payload in battery-powered wireless sensors deployed in remote locations. IC Role / Device Role / Timing Role: Dual-role memory: stores signed bootloader in protected region and encrypted application updates in user area. Use Value: Deep power-down current (1.5 µA) extends 10-year battery life; OTP registers bind firmware to hardware for anti-cloning. |
| Medical Diagnostic Instrument Code Storage | Automotive ADAS Camera Module Flash |
Use Scenario: Holding calibration data, image processing algorithms, and regulatory-compliant firmware in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage with JEDEC-standard manufacturer/device ID for traceability and revision control. Use Value: Quad I/O read speed (108 MHz) reduces boot time to <150 ms, meeting medical device startup latency requirements. |
Use Scenario: Storing camera ISP firmware and lens correction tables in automotive surround-view systems requiring AEC-Q100 Grade 2 qualification. IC Role / Device Role / Timing Role: Secondary boot memory co-located with SoC; supports fast reflash during vehicle service via CAN-FD triggered update protocol. Use Value: Flexible 4 kB/32 kB/64 kB erase blocks allow partial updates without disrupting active vision processing tasks. |
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 clock, 1.65–3.6 V supply, no OTP registers, SFDP v1.6 compliant. | Lacks hardware-based security registers; requires external crypto for secure boot binding. | Select when higher clock speed and broader voltage range outweigh need for on-chip OTP security. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit, 133 MHz, 2.7–3.6 V, includes 4 × 256-byte OTP, supports Xccela interface (not SPI-only). | Higher density and dual-interface capability; larger footprint (16-pin SOIC) incompatible with AT25SF161-SSHD-B layout. | Choose for future-proof scalability where board redesign accommodates larger package and added interface flexibility. |
Compared with W25Q16JVSNIQ and MT25QL128ABA8ESF-0SIT, AT25SF161-SSHD-B offers optimal balance of security (3×OTP), compact SOIC-8 footprint, and verified XiP performance at 108 MHz - making it ideal for space-constrained, security-sensitive embedded designs requiring drop-in replacement viability.
Availability
AT25SF161-SSHD-B is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF161-SSHD-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and IoT markets.
The AT25SF161-SSHD-B belongs to Renesas' AT25SF family of SPI flash memories engineered for high-reliability embedded boot and XiP applications with integrated security and low-power operation.
FAQ
What is the operating voltage range for the AT25SF161-SSHD-B?
The AT25SF161-SSHD-B supports two supply voltage options: 2.7 V to 3.6 V and 2.5 V to 3.6 V. This dual-voltage capability allows interoperability with both 3.3 V and 2.5 V system rails, simplifying integration into mixed-voltage designs without level-shifting circuitry. The device maintains full specification compliance across the entire range, including 108 MHz operation and deep power-down current of ≤1.5 µA.
Does the AT25SF161-SSHD-B support execute-in-place (XiP) functionality?
Yes, the AT25SF161-SSHD-B explicitly supports execute-in-place (XiP) through quad I/O (1-4-4) and continuous read (0-4-4) command modes. These features eliminate opcode transmission overhead and deliver sustained high-bandwidth instruction fetches directly from flash, enabling deterministic real-time execution without RAM loading delays. The 108 MHz maximum clock frequency ensures sub-microsecond access latency for critical code paths.
How many one-time programmable (OTP) security registers does the AT25SF161-SSHD-B include?
The AT25SF161-SSHD-B includes three 256-byte one-time programmable (OTP) security registers. These registers are physically irreversible after programming and are used to store immutable data such as unique device identifiers, cryptographic keys, or secure boot manifests. Their presence enables hardware-rooted trust anchors essential for secure boot and anti-counterfeiting in regulated applications.
What package type is used for the AT25SF161-SSHD-B?
The AT25SF161-SSHD-B uses an 8-lead SOIC package with 0.150-inch (3.9 mm) narrow body width. This JEDEC-standard footprint ensures mechanical and solder-reflow compatibility with legacy PCB layouts designed for earlier-generation SPI flash devices, enabling seamless drop-in upgrades without board redesign.
Can the AT25SF161-SSHD-B be used in automotive applications?
The AT25SF161-SSHD-B operates across the industrial temperature range of –40°C to +85°C and complies with RoHS and green packaging standards. While not AEC-Q200 qualified out-of-the-box, its specifications align with many automotive infotainment and ADAS camera module requirements. Customers implementing automotive-grade thermal and ESD design practices can deploy AT25SF161-SSHD-B in non-safety-critical subsystems where extended temperature stability and low-power operation are prioritized.
AT25SF161-SSHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25SF161-SSHD-B FAQ
1.How can I place an order for AT25SF161-SSHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-SSHD-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 AT25SF161-SSHD-B reliable?
The price and inventory of AT25SF161-SSHD-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161-SSHD-B is usually 5 days.
3.What payment methods are accepted for AT25SF161-SSHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-SSHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-SSHD-B?
AT25SF161-SSHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-SSHD-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 AT25SF161-SSHD-B?
For technical support, including AT25SF161-SSHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-SSHD-B requirements.
6.How does Aetrix verify that AT25SF161-SSHD-B is sourced from the original manufacturer or authorized distributors?
All AT25SF161-SSHD-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 AT25SF161-SSHD-B meets industry standards.
7.What is the process for return or replacement of AT25SF161-SSHD-B?
All AT25SF161-SSHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-SSHD-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 AT25SF161-SSHD-B part is unused and in its original packaging.
Return procedure for AT25SF161-SSHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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