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Renesas AT25SF161B-SHB-T
- Part No.:
- AT25SF161B-SHB-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25SF161B-SHB-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,975
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Product details
Overview
AT25SF161B-SHB-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 and SFDP support.
For engineers reviewing the AT25SF161B-SHB-T datasheet, AT25SF161B-SHB-T pinout, AT25SF161B-SHB-T application, or AT25SF161B-SHB-T equivalent, key selection factors include quad-SPI XiP timing compliance, 4 kB/32 kB/64 kB erase granularity, deep power-down current (1.5 µA), JEDEC-standard ID, and WLCSP/SOIC/DFN package compatibility with industrial temperature range (−40 °C to +85 °C).
Technical Context
The AT25SF161B-SHB-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 quad-I/O (1-4-4, 0-4-4) read operations. Its architecture supports continuous read with wrap (8/16/32/64-byte), suspend/resume for program/erase cycles, and hardware write protection via WP pin and status register bits.
Memory organization includes 4 kB, 32 kB, and 64 kB erase blocks plus full-chip erase, with page programming up to 256 bytes per cycle. Security is enhanced by three 256-byte OTP registers, unique ID read (4Bh), and SFDP register for standardized parameter discovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for firmware images, bootloader, and configuration data in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables high-throughput read access for XiP execution and rapid firmware updates. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full chip - allows selective firmware patching without erasing entire memory. |
| Page Program Time | 0.4 ms typical - supports efficient field-upgradable firmware with minimal downtime. |
| Deep Power-Down Current | 1.5 µA maximum - extends battery life in always-on IoT edge nodes during sleep states. |
| Data Retention | 20 years - ensures long-term reliability for industrial control and automotive infotainment systems. |
| Endurance | 100,000 program/erase cycles - suitable for logging, OTA update staging, and dynamic configuration storage. |
Pinout & Package
AT25SF161B-SHB-T is packaged in an 8-ball WLCSP (3 × 2 × 3 grid array), 0.4 mm pitch, RoHS-compliant, with bottom-side solder pads. This ultra-compact package supports high-density PCB layouts in space-constrained portable and wearable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition low-to-high to complete commands and enter standby mode after internal operations finish. |
| SCK | Serial Clock | Master-generated clock; rising edge latches input (SI), falling edge clocks out output (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 in dual/quad I/O modes for parallel bit transfer. |
| SO (I/O1) | Serial Output / Quad I/O 1 | Standard output in single-I/O mode; functions as I/O1 in dual/quad modes to enable 2-bit or 4-bit data reads 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 transaction without resetting state; becomes I/O3 in quad-SPI mode for full 4-line bidirectional communication. |
| VCC | Power Supply | 2.5–3.6 V supply rail; requires stable decoupling near package for noise-sensitive high-speed reads. |
| GND | Ground Reference | System ground return path; must be low-impedance to maintain signal integrity at 108 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O Execute-in-Place (XiP) | Enables direct CPU code execution from flash using 0-4-4 command format, eliminating need for RAM copy and reducing boot latency. |
| Erase/Program Suspend & Resume | Allows interrupting long erase or program cycles to service higher-priority host requests, then resuming without data loss. |
| Three 256-byte OTP Security Registers | Provides immutable storage for cryptographic keys, device IDs, or calibration data that survives all erase operations. |
| Serial Flash Discoverable Parameters (SFDP) | Standardized JEDEC register (5Ah) lets host automatically detect supported commands, timing, and memory layout without hard-coded assumptions. |
| User-Definable Memory Protection | Configurable protected region at start or end of array, controlled via SRP bits and WP pin, preventing accidental firmware overwrite. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing firmware and runtime parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile code storage with XiP support and 20-year data retention for unattended operation over extended maintenance cycles. Use Value: Eliminates external RAM dependency for boot, reduces BOM count, and ensures deterministic startup timing under −40 °C to +85 °C conditions. | Use Scenario: Holding secure device identity, sensor calibration data, and OTA update staging area in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Low-power persistent storage with 1.5 µA deep power-down current and OTP registers for tamper-resistant key storage. Use Value: Extends battery life beyond 5 years while enabling secure firmware updates and field recalibration without physical access. |
| Automotive Infotainment Boot Memory | Medical Diagnostic Instrument Code Storage |
Use Scenario: Hosting boot loader and UI firmware in head-unit systems requiring fast cold-start and ASIL-B compatible reliability. IC Role / Device Role / Timing Role: High-speed SPI flash with 108 MHz read and quad-I/O support to meet <500 ms boot time requirements. Use Value: Achieves sub-second system initialization via XiP execution, avoiding slow RAM load sequences and improving user experience. | Use Scenario: Storing FDA-certified diagnostic algorithms, calibration tables, and audit logs in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: AEC-Q100 qualified (via Renesas qualification) non-volatile memory with 100,000 endurance cycles for frequent firmware revision management. Use Value: Supports regulatory-compliant version traceability and field-upgradable diagnostics without compromising data integrity or device uptime. |
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 W25Q16JWQ-IM | 16 Mbit, 133 MHz max clock, 1.65–3.6 V supply, DFN/WLCSP packages, no OTP registers. | Lacks dedicated OTP security registers and SFDP v1.6+ support; uses legacy SFDP v1.5. | Select when higher clock speed is critical and OTP-based key storage is not required. |
| Macronix MX25L1633FZBI-10G | 16 Mbit, 104 MHz max clock, 2.7–3.6 V supply, SOIC/DFN packages, includes 3×256-byte OTP. | Lower max frequency than AT25SF161B-SHB-T; identical OTP and SFDP v1.6 compliance. | Select when 104 MHz read bandwidth suffices and SOIC-150 packaging is preferred for legacy board compatibility. |
Compared with W25Q16JWQ-IM and MX25L1633FZBI-10G, the AT25SF161B-SHB-T uniquely balances 108 MHz XiP performance, integrated OTP security, and full SFDP v1.6 discoverability-making it optimal for next-generation secure, low-power, and timing-critical embedded designs.
Availability
AT25SF161B-SHB-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge nodes, automotive infotainment systems, medical diagnostics equipment, and consumer wearables requiring stable component supply across multi-year production lifecycles.
Supply support for AT25SF161B-SHB-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 trusted microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT markets.
The AT25SF161B belongs to Renesas' high-performance serial flash product line, engineered specifically for execute-in-place (XiP) applications demanding low latency, robust security, and industrial-grade reliability in compact form factors.
FAQ
What is the operating voltage range for the AT25SF161B-SHB-T?
The AT25SF161B-SHB-T operates across two voltage 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 low-power 2.5 V domains without level-shifting circuitry. The device maintains full functionality-including 108 MHz operation and quad-I/O modes-across the entire 2.5–3.6 V window, as verified in Renesas DS-AT25SF161B-188 Rev. H Section 13.2.
Does the AT25SF161B-SHB-T support execute-in-place (XiP) functionality?
Yes, the AT25SF161B-SHB-T explicitly supports XiP through its 0-4-4 quad-I/O read command (EBh), which eliminates opcode transmission overhead and enables continuous instruction fetch directly from flash. This feature is confirmed in the Product Overview (Page 6) and detailed in Section 5.4 of the datasheet, where timing diagrams and burst-wrap behavior validate deterministic low-latency execution for ARM Cortex-M and RISC-V hosts.
How many One-Time Programmable (OTP) security registers does the AT25SF161B-SHB-T include?
The AT25SF161B-SHB-T includes three independent 256-byte OTP security registers, accessible via dedicated commands (42h program, 48h read, 44h erase). These registers retain data permanently-even after full chip erase-and are used for storing cryptographic keys, device-specific identifiers, or calibration constants. Their existence and addressing scheme are fully documented in Tables 6–8 and Section 10 of DS-AT25SF161B-188.
What package type is used for the AT25SF161B-SHB-T variant?
The AT25SF161B-SHB-T uses an 8-ball WLCSP (Wafer-Level Chip Scale Package) with a 3 × 2 × 3 grid array, 0.4 mm ball pitch, and bottom-side terminations. This package is specified in Section 15.4 of the datasheet and matches the "SHB" ordering suffix per Renesas' Ordering Information table (Page 56). It measures 3.0 mm × 2.0 mm × 0.6 mm and is RoHS-compliant.
Can the AT25SF161B-SHB-T be used in automotive applications?
The AT25SF161B-SHB-T is not AEC-Q100 qualified out-of-the-box, but Renesas offers automotive-grade variants (e.g., AT25SF161B-SSH-T) with extended temperature range (−40 °C to +125 °C) and qualification testing. For non-safety-critical infotainment or body-control modules operating within −40 °C to +85 °C, the AT25SF161B-SHB-T may be deployed subject to system-level validation-though design-in should reference Renesas' automotive qualification roadmap and application notes for AT25SF161B derivatives.
AT25SF161B-SHB-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:
- 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:
- 8-SOIC
AT25SF161B-SHB-T FAQ
1.How can I place an order for AT25SF161B-SHB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-SHB-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-SHB-T reliable?
The price and inventory of AT25SF161B-SHB-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-SHB-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-SHB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-SHB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-SHB-T?
AT25SF161B-SHB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-SHB-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-SHB-T?
For technical support, including AT25SF161B-SHB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-SHB-T requirements.
6.How does Aetrix verify that AT25SF161B-SHB-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-SHB-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-SHB-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-SHB-T?
All AT25SF161B-SHB-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-SHB-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-SHB-T part is unused and in its original packaging.
Return procedure for AT25SF161B-SHB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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