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Renesas AT25FF161A-SHN-B
- Part No.:
- AT25FF161A-SHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25FF161A-SHN-B.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
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Product details
Overview
AT25FF161A-SHN-B from Renesas Electronics is a 16-Mbit SPI serial flash memory IC supporting quad I/O, XiP (eXecute-in-Place), and multi-voltage operation (1.65 V–3.75 V). It delivers up to 133 MHz read frequency in 1-4-4 mode, features 4/32/64-kB block erase, 100,000 program/erase cycles, and ultra-low 5–7 nA deep power-down current. It is used for firmware storage and direct code execution in resource-constrained embedded systems.
For engineers reviewing the AT25FF161A-SHN-B datasheet, AT25FF161A-SHN-B pinout, AT25FF161A-SHN-B application, or AT25FF161A-SHN-B equivalent, key selection considerations include its quad I/O timing compliance, XiP-ready command set (EBh/E7h), JEDEC SFDP support, and factory-programmed 128-byte UID for secure boot verification.
Technical Context
The AT25FF161A-SHN-B implements a flexible SPI interface with full backward compatibility across modes 0 and 3, and extends functionality via dual-output (1-1-2), quad-output (1-1-4), and true quad I/O (1-4-4, 0-4-4) protocols. Its XiP mode eliminates opcode overhead using burst wrap and double-word-aligned addressing.
Internally, it integrates five status registers (SR1–SR5), hardware reset capability (JEDEC-compliant), and OTP security registers (3 × 128 bytes) with lockable write protection. Memory architecture supports nested erase/program suspend/resume operations and user-definable block protection at either array boundary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for firmware images, bootloader, and configuration data in compact MCU-based designs. |
| Operating Voltage | 1.65 V – 3.75 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic without level shifters. |
| Max Clock Frequency | 133 MHz (1-4-4 mode) - achieves >50 MB/s effective read throughput for real-time XiP execution. |
| Erase Granularity | 4-kB / 32-kB / 64-kB blocks + full chip - allows fine-grained firmware updates without disturbing adjacent sectors. |
| Power-Down Current | 5–7 nA (Ultra-Deep Power-Down) - extends battery life in always-on IoT edge nodes during sleep states. |
| Data Retention | 20 years at –40 °C to +85 °C - meets industrial-grade reliability requirements for unattended deployments. |
| Endurance | 100,000 program/erase cycles - supports frequent field firmware updates over product lifetime. |
Pinout & Package
AT25FF161A-SHN-B is supplied in an 8-pad, 2 × 3 × 0.6 mm DFN package with wettable flank leads, optimized for automated optical inspection (AOI) and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS# | Chip Select | Active-low enable for SPI command/address/data transfers; supports daisy-chaining in multi-device configurations. |
| DO (IO1) | Data Output / I/O 1 | Primary output in standard/dual/quad modes; bidirectional in quad I/O (1-4-4) for address/data multiplexing. |
| WP# (IO2) | Write Protect / I/O 2 | Hardware write protection when held low; functions as I/O2 in quad I/O mode for expanded bus width. |
| HOLD# (IO3) | Hold / I/O 3 | Suspends ongoing SPI transfer without deselecting device; serves as I/O3 in quad I/O for full 4-line bidirectional operation. |
| DI (IO0) | Data Input / I/O 0 | Standard input for commands/addresses; bidirectional I/O0 in quad I/O mode, enabling true 4-bit parallel data flow. |
| CLK | Clock Input | Drives synchronous SPI timing; supports up to 133 MHz in quad I/O mode with precise setup/hold margins. |
| VCC | Supply Voltage | 1.65–3.75 V input; internal LDO ensures stable core voltage across wide input range and temperature. |
| GND | Ground | Reference return path for all I/O and core circuitry; DFN thermal pad enhances thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O (1-4-4 / 0-4-4) support | Enables continuous high-speed reads without repeated opcodes, reducing CPU overhead and improving XiP determinism. |
| Factory-programmed 128-byte UID | Provides cryptographically verifiable device identity for secure boot, anti-cloning, and firmware binding. |
| Three 128-byte OTP security registers | Allows permanent storage of keys, certificates, or calibration data that cannot be overwritten after programming and locking. |
| Erase/program suspend & resume | Permits interruption of long-duration operations (e.g., 64-kB erase) to service time-critical interrupts, then resume seamlessly. |
| User-configurable I/O drive strength | Adjusts output slew rate and current to match trace impedance and reduce EMI in high-speed routing environments. |
Applications
| Firmware Storage in Industrial PLCs | Secure Boot in Medical Edge Devices |
|---|---|
Use Scenario: Stores firmware and configuration data for programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile program memory with 20-year data retention at –40 °C to +85 °C and 100,000 endurance cycles. Use Value: Eliminates need for external EEPROM backup; supports in-field firmware updates via 4-kB block erase granularity. |
Use Scenario: Hosts signed bootloader and root-of-trust keys in FDA-cleared diagnostic sensors requiring cryptographic integrity verification. IC Role / Device Role / Timing Role: Secure storage element with factory UID and OTP registers locked against tampering. Use Value: Enables hardware-rooted chain-of-trust by binding firmware signature validation to immutable device identity. |
| XiP Execution in Automotive Telematics | Low-Power Data Logging in Smart Meters |
Use Scenario: Executes application code directly from flash in LTE-connected telematics control units to minimize RAM footprint and boot latency. IC Role / Device Role / Timing Role: High-speed XiP memory with 133 MHz 1-4-4 read bandwidth and burst wrap command optimization. Use Value: Reduces system BOM cost and power by eliminating external SDRAM while maintaining deterministic instruction fetch timing. |
Use Scenario: Captures metering event logs and tariff schedules in battery-powered smart electricity meters with 15-year field life. IC Role / Device Role / Timing Role: Ultra-low-power non-volatile storage with 5–7 nA UDPD current and 10-year data retention at –40 °C to +105 °C. Use Value: Extends battery service interval beyond 10 years by minimizing quiescent current during extended sleep intervals. |
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 | 16 Mbit, 1.65–3.6 V, 133 MHz max, but lacks native 0-4-4 XiP mode and has no factory UID. | Supports standard Quad-SPI but requires software-managed opcode retransmission in continuous read; no hardware root-of-trust foundation. | Select when XiP determinism and cryptographic identity are not required, and cost sensitivity outweighs security needs. |
| Micron MT25QL128ABA | 128 Mbit density, 1.7–2.0 V only, supports 0-4-4 and SFDP, includes 64-byte UID but no OTP security registers. | Higher capacity suits larger firmware; narrower voltage range limits use in mixed-supply systems; no OTP for key binding. | Choose for high-capacity XiP where voltage rails are strictly 1.8 V and UID suffices-avoid if 1.65 V start-up or key storage is mandatory. |
Compared with W25Q16JW and MT25QL128ABA, the AT25FF161A-SHN-B uniquely combines factory UID, three OTP registers, ultra-deep power-down, and full 0-4-4 XiP support in a single 2×3 mm DFN package-making it optimal for secure, low-power, space-constrained embedded firmware storage.
Availability
AT25FF161A-SHN-B is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive telematics, and smart utility metering requiring stable component supply and long-term lifecycle assurance.
Supply support for AT25FF161A-SHN-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 enterprise applications.
The AT25FF161A-SHN-B belongs to Renesas' high-performance serial flash memory family, engineered specifically for secure, low-power, and XiP-capable embedded firmware storage in space- and energy-constrained systems.
FAQ
What is the operating voltage range supported by the AT25FF161A-SHN-B?
The AT25FF161A-SHN-B operates across 1.65 V to 3.75 V, enabling interoperability with 1.8 V, 2.5 V, and 3.3 V host systems without level-shifting circuitry. This wide range is validated across –40 °C to +105 °C ambient temperatures per datasheet Section 8.4 and 8.5.
Does the AT25FF161A-SHN-B support eXecute-in-Place (XiP) operation?
Yes, the AT25FF161A-SHN-B supports true XiP via 1-4-4 and 0-4-4 command formats (EBh/E7h), allowing continuous instruction fetch without repeated opcodes. Its burst wrap feature (77h) and double-word-aligned addressing eliminate timing gaps between reads, ensuring deterministic execution latency.
How many one-time programmable (OTP) security registers does the AT25FF161A-SHN-B include?
The AT25FF161A-SHN-B includes three 128-byte OTP security registers (OTP0–OTP2), each independently lockable via dedicated commands (9Bh/98h). Once locked, their contents are permanently immutable-providing hardware-enforced storage for cryptographic keys, calibration data, or device-specific credentials.
What is the minimum deep power-down current for the AT25FF161A-SHN-B?
The AT25FF161A-SHN-B achieves 5–7 nA typical current in Ultra-Deep Power-Down (UDPD) mode (79h), as specified in Section 7.31 and Table 7 of the datasheet. This enables multi-year battery operation in always-on sensor nodes and smart meters with infrequent wake-up intervals.
Is the AT25FF161A-SHN-B pin-compatible with other Renesas serial flash devices?
The AT25FF161A-SHN-B uses an industry-standard 8-pin DFN (2 × 3 × 0.6 mm) footprint matching Renesas' AT25SF041 and AT25SF128A pinouts, but functional compatibility requires verification of command set, status register layout, and timing parameters-especially for XiP and OTP features unique to the AT25FF161A-SHN-B.
AT25FF161A-SHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 133 MHz
- Write Cycle Time - Word, Page:
- 12µs, 8ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25FF161A-SHN-B FAQ
1.How can I place an order for AT25FF161A-SHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25FF161A-SHN-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 AT25FF161A-SHN-B reliable?
The price and inventory of AT25FF161A-SHN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25FF161A-SHN-B is usually 5 days.
3.What payment methods are accepted for AT25FF161A-SHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF161A-SHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25FF161A-SHN-B?
AT25FF161A-SHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25FF161A-SHN-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 AT25FF161A-SHN-B?
For technical support, including AT25FF161A-SHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF161A-SHN-B requirements.
6.How does Aetrix verify that AT25FF161A-SHN-B is sourced from the original manufacturer or authorized distributors?
All AT25FF161A-SHN-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 AT25FF161A-SHN-B meets industry standards.
7.What is the process for return or replacement of AT25FF161A-SHN-B?
All AT25FF161A-SHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF161A-SHN-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 AT25FF161A-SHN-B part is unused and in its original packaging.
Return procedure for AT25FF161A-SHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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