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Renesas AT25SF161B-UUD-T
- Part No.:
- AT25SF161B-UUD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-XFBGA, WLCSP
- Datasheet:
-
AT25SF161B-UUD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
AT25SF161B-UUD-T 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 for firmware integrity.
For engineers reviewing the AT25SF161B-UUD-T datasheet, AT25SF161B-UUD-T pinout, AT25SF161B-UUD-T application, or AT25SF161B-UUD-T equivalent, key selection factors include quad-SPI XiP support, 4 kB/32 kB/64 kB flexible erase granularity, deep power-down current ≤1.5 µA, JEDEC-standard SFDP register, and industrial temperature range (−40°C to +85°C).
Technical Context
The AT25SF161B-UUD-T implements a hierarchical memory architecture with 4 kbyte, 32 kbyte, and 64 kbyte erase blocks plus full-chip erase, enabling optimized code/data partitioning. Its command set supports SPI modes 0 and 3, with dedicated opcodes for dual-output (3Bh), dual-I/O (BBh), quad-output (6Bh), and quad-I/O reads (EBh, E7h).
Internal control logic manages status register protection (SRP0/SRP1), quad-enable (QE) bit in Status Register 2, and volatile/non-volatile write enable states. The device uses a 256-byte page programming model with 0.4 ms typical program time and supports suspend/resume during erase or program cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for bootloader, firmware image, and configuration data in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables high-throughput code fetch in XiP applications without external cache bottlenecks. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full chip - allows independent firmware update of application sections without disturbing boot code. |
| Power Consumption | 1.5 µA deep power-down current - extends battery life in always-on IoT edge nodes during idle periods. |
| Data Retention | 20 years - ensures long-term reliability for industrial equipment with infrequent firmware updates. |
| Endurance | 100,000 P/E cycles - supports field-upgradable firmware with frequent minor patch deployments. |
| Operating Temperature | −40°C to +85°C - qualified for use in automotive cabin modules, industrial HMIs, and outdoor gateways. |
Pinout & Package
AT25SF161B-UUD-T is packaged in an 8-lead SOIC (0.208" wide), with pins arranged as follows:
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-low enable signal; must transition low-to-high to complete commands and enter standby after self-timed 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: protects status registers when QE=0 and SRP=01; serves as I/O2 in quad mode when QE=1. |
| 4 GND | Ground Reference | System ground return path; decoupling capacitor required near VCC/GND pins for stable SPI timing. |
| 5 VCC | Power Supply | 2.5–3.6 V input; requires 100 nF ceramic decoupling capacitor per datasheet Section 13.6. |
| 6 HOLD (I/O3) | Hold Input / Quad I/O Line 3 | Pauses ongoing SPI transaction without resetting state; acts as I/O3 in quad mode when QE=1. |
| 7 SCK | Serial Clock | Master-generated clock; rising edge latches SI, falling edge clocks out SO/I/Ox; max 108 MHz. |
| 8 SI (I/O0) | Serial Input / Quad I/O Line 0 | Inputs commands/addresses on rising SCK edge; becomes I/O0 in dual/quad modes for bidirectional data flow. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Execute-in-Place (XiP) | Enables direct CPU instruction fetch via 0-4-4 command mode, eliminating need for RAM copy and reducing boot latency. |
| Serial Flash Discoverable Parameters (SFDP) | JEDEC-standard SFDP register (5Ah) provides host with programmable, versioned memory geometry and command set metadata. |
| Flexible Memory Protection | User-definable protected region at memory start or end, controlled by WP pin and SRP bits-prevents accidental firmware overwrite. |
| Three 256-byte OTP Security Registers | Immutable storage for cryptographic keys, device IDs, or secure boot hashes-critical for anti-cloning and firmware authentication. |
| Erase/Program Suspend & Resume | Allows host to pause background erase or program operations to service higher-priority interrupts, then resume without data loss. |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with execute-in-place capability for deterministic boot and runtime code execution. Use Value: 20-year data retention and −40°C to +85°C operation ensure firmware integrity across extended maintenance cycles and thermal stress. |
Use Scenario: Hosting boot loader and OS kernel for head unit SoCs requiring fast, reliable startup after ignition. IC Role / Device Role / Timing Role: High-speed SPI flash providing 108 MHz quad-I/O reads to meet automotive boot-time requirements. Use Value: 0-4-4 continuous read mode eliminates opcode overhead, reducing boot latency by up to 30% versus standard SPI reads. |
| IoT Edge Gateway Configuration | Medical Diagnostic Device Data Log |
|
Use Scenario: Storing network credentials, calibration tables, and OTA update packages in battery-powered cellular gateways. IC Role / Device Role / Timing Role: Low-power nonvolatile memory with deep power-down mode and secure OTP registers. Use Value: 1.5 µA deep power-down current extends 10-year battery life; OTP registers protect Wi-Fi credentials from extraction. |
Use Scenario: Recording sensor calibration data and diagnostic logs in portable ultrasound or ECG devices subject to regulatory audit. IC Role / Device Role / Timing Role: Tamper-resistant storage with write-protection and JEDEC-standard ID for traceability. Use Value: Manufacturer and device ID (9Fh) plus unique ID (4Bh) support FDA 21 CFR Part 11 electronic record compliance. |
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-QI | 16 Mbit, 133 MHz max, 1.65–3.6 V supply, no OTP registers, different SFDP layout. | Lacks hardware-based security registers; suitable where firmware signing is handled externally. | Choose W25Q16JW-QI if higher clock speed is prioritized over on-chip security features. |
| Micron MT25QL128ABA8ESF-0SIT | 128 Mbit, 133 MHz, 2.7–3.6 V, includes 4 × 256-byte OTP, but larger density increases cost and PCB footprint. | Over-specified capacity for 16 Mbit use cases; may require layout revision due to different pinout (16-pin SOIC). | Choose MT25QL128ABA8ESF-0SIT only when future firmware growth justifies 8× density and added cost. |
Compared with W25Q16JW-QI and MT25QL128ABA8ESF-0SIT, AT25SF161B-UUD-T uniquely balances 16 Mbit density, 108 MHz XiP performance, industrial temperature rating, and integrated 3×256-byte OTP-making it optimal for cost-sensitive, security-aware embedded systems where exact capacity alignment matters.
Availability
AT25SF161B-UUD-T is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, and IoT edge gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25SF161B-UUD-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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25SF161B-UUD-T belongs to Renesas' AT25SF family of SPI flash memories engineered for robust, low-power, secure code storage in resource-constrained embedded systems.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF161B-UUD-T?
The AT25SF161B-UUD-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O and quad-output read modes. This specification is validated under DC and AC operating conditions per datasheet Section 13.4 and enables high-bandwidth code execution in XiP configurations without external buffering.
Does the AT25SF161B-UUD-T support execute-in-place (XiP) functionality?
Yes, the AT25SF161B-UUD-T supports execute-in-place via its 0-4-4 command mode (EBh), which eliminates opcode transmission overhead and allows continuous instruction fetch directly from flash. This feature is explicitly confirmed in the Product Overview section of the DS-AT25SF161B-188 datasheet.
How many one-time programmable (OTP) security registers does the AT25SF161B-UUD-T include?
The AT25SF161B-UUD-T includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h, 44h, 48h). These registers are used for storing immutable cryptographic keys, device identifiers, or secure boot hashes as documented in Section 10 of the datasheet.
What package type is used for the AT25SF161B-UUD-T?
The AT25SF161B-UUD-T uses an 8-lead, 0.208" wide EIAJ SOIC package, as specified in Ordering Information Section 15.2 of the DS-AT25SF161B-188 datasheet. Pinout matches standard SOIC-8 with CS, SO, WP, GND, VCC, HOLD, SCK, and SI assignments.
Can the AT25SF161B-UUD-T operate across the full industrial temperature range?
Yes, the AT25SF161B-UUD-T is rated for operation from −40°C to +85°C, as stated in the Features section and Electrical Specifications Section 13.2 of the DS-AT25SF161B-188 datasheet. This makes it suitable for deployment in uncontrolled ambient environments such as factory floors and vehicle cabins.
AT25SF161B-UUD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-XFBGA, WLCSP
- 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:
- 50µs, 1.8ms
- Access Time:
- 7 ns
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP (1.61x1.35)
AT25SF161B-UUD-T FAQ
1.How can I place an order for AT25SF161B-UUD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-UUD-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-UUD-T reliable?
The price and inventory of AT25SF161B-UUD-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-UUD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-UUD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-UUD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-UUD-T?
AT25SF161B-UUD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-UUD-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-UUD-T?
For technical support, including AT25SF161B-UUD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-UUD-T requirements.
6.How does Aetrix verify that AT25SF161B-UUD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-UUD-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-UUD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-UUD-T?
All AT25SF161B-UUD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-UUD-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-UUD-T part is unused and in its original packaging.
Return procedure for AT25SF161B-UUD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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