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Renesas AT25SF161-SHDHR-T
- Part No.:
- AT25SF161-SHDHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF161-SHDHR-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,819
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Product details
Overview
AT25SF161-SHDHR-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC supporting dual I/O and quad I/O operations, with 108 MHz max clock frequency, 2.5–3.6 V supply range, 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 for firmware integrity in industrial microcontroller systems.
For engineers reviewing the AT25SF161-SHDHR-T datasheet, AT25SF161-SHDHR-T pinout, AT25SF161-SHDHR-T application, or AT25SF161-SHDHR-T equivalent, key selection criteria include XiP support, quad-SPI timing compliance, 4 kB/32 kB/64 kB erase granularity, deep power-down current ≤1.5 µA, and JEDEC-standard SFDP register access for automated configuration.
Technical Context
The AT25SF161-SHDHR-T implements a flexible SPI interface compliant with modes 0 and 3, enabling dual-output (1-1-2), dual-I/O (1-2-2), quad-output (1-1-4), and full quad-I/O (1-4-4, 0-4-4) read operations. Its architecture supports continuous read with wrap (8/16/32/64-byte), eliminating repeated opcode transmission during burst fetches.
Internally, it features a 4 Mbit physical block size, 256-byte page programming, and three-tier erase hierarchy (4 kB, 32 kB, 64 kB blocks plus full-chip erase). Memory protection is enforced via user-definable regions controlled by WP pin and Status Register bits SRP0/SRP1, with non-volatile lock capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for MCU boot code, firmware images, and configuration data in space-constrained designs. |
| Max Clock Frequency | 108 MHz - enables high-throughput read operations critical for XiP execution latency reduction. |
| Supply Voltage Range | 2.5 V to 3.6 V - compatible with modern low-voltage SoCs and battery-powered edge devices. |
| Erase Time (4 kB block) | 50 ms typical - allows rapid field firmware updates without excessive downtime. |
| Page Program Time | 0.4 ms typical - supports efficient runtime parameter logging and small-data writes. |
| Deep Power-Down Current | 1.5 µA maximum - extends battery life in always-on IoT sensor nodes during idle periods. |
| Data Retention | 20 years - ensures long-term reliability for industrial control firmware storage. |
Pinout & Package
AT25SF161-SHDHR-T is packaged in an 8-lead SOIC (0.208" wide), with pins arranged as follows:
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-low enable signal; must transition high-to-low to initiate commands and low-to-high to terminate operations. |
| 2: SO (I/O1) | Serial Output / Quad I/O Line 1 | Outputs data on falling SCK edge; functions as I/O1 in dual/quad I/O modes for parallel bit transfer. |
| 3: WP (I/O2) | Write Protect / Quad I/O Line 2 | Configurable as hardware write-protection input (when QE=0) or I/O2 in quad-SPI mode (when QE=1). |
| 4: GND | Ground Reference | System ground connection; required for stable logic levels and noise immunity. |
| 5: VCC | Power Supply | 2.5–3.6 V main supply; internal regulation supports consistent operation across voltage range. |
| 6: HOLD (I/O3) | Hold Input / Quad I/O Line 3 | Pauses ongoing SPI transfers without resetting state; repurposed as I/O3 when quad-SPI enabled. |
| 7: SCK | Serial Clock | Input clock driving all SPI timing; rising edge latches SI, falling edge clocks SO. |
| 8: SI (I/O0) | Serial Input / Quad I/O Line 0 | Accepts commands, addresses, and data on rising SCK edge; becomes I/O0 in multi-I/O read modes. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Read (1-4-4 / 0-4-4) | Enables 4-bit-per-cycle reads with continuous burst wrap, reducing instruction fetch latency in XiP systems. |
| Program/Erase Suspend & Resume | Allows background erase or program to be paused for urgent read access-critical for real-time firmware updates. |
| 3 × 256-byte OTP Security Registers | Stores immutable keys or device identifiers; prevents unauthorized firmware cloning or tampering. |
| Serial Flash Discoverable Parameters (SFDP) | Provides standardized, vendor-agnostic register map for automatic driver initialization and configuration. |
| User-Definable Memory Protection | Allows locking top or bottom memory segments via WP pin or status register, protecting bootloader or calibration data. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
|
Use Scenario: Storing firmware images and runtime parameters in programmable logic controllers operating in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Non-volatile code storage with execute-in-place (XiP) support for deterministic boot and real-time task loading. Use Value: 108 MHz quad-I/O read speed reduces instruction fetch latency; 20-year data retention ensures long service life without refresh. |
Use Scenario: Holding sensor calibration tables, network credentials, and OTA update staging buffers in battery-powered smart meters. IC Role / Device Role / Timing Role: Low-power persistent memory with deep power-down mode and secure OTP registers for credential isolation. Use Value: 1.5 µA deep power-down current extends battery life; 3×256-byte OTP secures device identity against cloning. |
| Medical Device Bootloader | Automotive Infotainment Code Storage |
|
Use Scenario: Hosting certified bootloader and diagnostic firmware in Class II medical equipment requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Secure, protected memory region for verified boot code with hardware write-protection via WP pin. Use Value: Non-volatile protection with SRP0/SRP1 bits prevents accidental overwrite; JEDEC ID ensures supply chain authenticity. |
Use Scenario: Storing UI assets, voice recognition models, and navigation maps in automotive head units with thermal cycling requirements. IC Role / Device Role / Timing Role: High-speed quad-SPI flash supporting fast map loading and seamless UI transitions during vehicle operation. Use Value: 64 kB block erase enables rapid map updates; 108 MHz read bandwidth sustains real-time graphics rendering. |
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, no SFDP v1.6 support. | Lacks OTP security and SFDP-based auto-configuration; suitable for cost-sensitive consumer designs without firmware integrity requirements. | Select when higher clock speed is prioritized over security features and standardized parameter discovery. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit, 133 MHz, 2.7–3.6 V, includes SFDP v1.6 and 4 × 256-byte OTP, but larger density and different erase granularity (4 kB/64 kB only). | Higher capacity suits complex infotainment systems; not drop-in due to pin-compatible but different memory map and command set extensions. | Choose for scalable firmware storage where future-proofing and enhanced security justify footprint and BOM cost increase. |
Compared with W25Q16JVSNIQ and MT25QL128ABA8ESF-0SIT, the AT25SF161-SHDHR-T offers balanced performance, integrated security (OTP + SFDP), and precise 16 Mbit capacity ideal for resource-constrained embedded boot applications-without over-provisioning or sacrificing XiP efficiency.
Availability
AT25SF161-SHDHR-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, IoT edge node configuration, medical device bootloaders, and automotive infotainment code storage requiring stable component supply and long-term lifecycle support.
Supply support for AT25SF161-SHDHR-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 industrial, automotive, and IoT markets.
The AT25SF161-SHDHR-T belongs to Renesas' AT25SF family of SPI flash memories engineered for reliable, secure, and high-performance code storage in resource-constrained embedded systems with execute-in-place requirements.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF161-SHDHR-T?
The AT25SF161-SHDHR-T supports a maximum SPI clock frequency of 108 MHz for fast read operations, including quad-I/O modes. This specification is validated across the full industrial temperature range (-40°C to +85°C) and 2.5–3.6 V supply, enabling low-latency instruction fetch in execute-in-place (XiP) configurations. The device maintains timing compliance per AC characteristics in Section 13.4 of the DS-AT25SF161B-188 datasheet.
Does the AT25SF161-SHDHR-T support execute-in-place (XiP) functionality?
Yes, the AT25SF161-SHDHR-T explicitly supports execute-in-place (XiP) through optimized features: quad-SPI (1-4-4 and 0-4-4 command formats), continuous read with wrap, and 108 MHz maximum clock frequency. These reduce instruction fetch latency and eliminate the need to copy code to RAM before execution-making AT25SF161-SHDHR-T suitable for boot code and real-time firmware in microcontroller-based systems.
How many One-Time Programmable (OTP) security registers does the AT25SF161-SHDHR-T include?
The AT25SF161-SHDHR-T includes three 256-byte One-Time Programmable (OTP) security registers, accessible via dedicated commands (42h program, 48h read, 44h erase). These registers are used to store immutable device identifiers, cryptographic keys, or firmware signatures-providing hardware-enforced protection against cloning or unauthorized firmware modification in security-critical applications.
What package type is used for the AT25SF161-SHDHR-T?
The AT25SF161-SHDHR-T uses an 8-lead SOIC package with 0.208" wide body (EIAJ standard), as confirmed in Section 15.2 of the DS-AT25SF161B-188 datasheet. This surface-mount package provides mechanical robustness and thermal performance suited for industrial and automotive PCB assemblies, with pinout fully compatible with JEDEC-standard SPI flash footprints.
Does the AT25SF161-SHDHR-T support Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25SF161-SHDHR-T implements the JEDEC-standard Serial Flash Discoverable Parameters (SFDP) register (command 5Ah), allowing host systems to automatically detect and configure memory parameters-including timing, erase capabilities, and security features-without hard-coded driver assumptions. This simplifies firmware portability and enables plug-and-play integration across multiple platforms.
AT25SF161-SHDHR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SHDHR-T FAQ
1.How can I place an order for AT25SF161-SHDHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-SHDHR-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 AT25SF161-SHDHR-T reliable?
The price and inventory of AT25SF161-SHDHR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161-SHDHR-T is usually 5 days.
3.What payment methods are accepted for AT25SF161-SHDHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-SHDHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-SHDHR-T?
AT25SF161-SHDHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-SHDHR-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 AT25SF161-SHDHR-T?
For technical support, including AT25SF161-SHDHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-SHDHR-T requirements.
6.How does Aetrix verify that AT25SF161-SHDHR-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161-SHDHR-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 AT25SF161-SHDHR-T meets industry standards.
7.What is the process for return or replacement of AT25SF161-SHDHR-T?
All AT25SF161-SHDHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-SHDHR-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 AT25SF161-SHDHR-T part is unused and in its original packaging.
Return procedure for AT25SF161-SHDHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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