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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas AT25FF161A-SSHN-B

Name: AT25FF161A-SSHN-B
Brand: Renesas
SKU: AT25FF161A-SSHN-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT25FF161A-SSHN-B

Manufacturer:: Renesas

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AT25FF161A-SSHN-B.pdf

Description:: IC FLASH 16MBIT SPI/QUAD 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,449

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Product details

Overview

AT25FF161A-SSHN-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 clock frequency in 1-4-4 mode, features 4/32/64-kB block erase, 100,000 program/erase cycles, and ultra-low 5–7 nA Ultra-Deep Power-Down current. It is used for firmware storage and direct code execution in resource-constrained embedded systems.

For engineers reviewing the AT25FF161A-SSHN-B datasheet, AT25FF161A-SSHN-B pinout, AT25FF161A-SSHN-B application, or AT25FF161A-SSHN-B equivalent, key selection criteria include XiP support, multi-I/O timing compliance, industrial temperature range (−40 °C to +105 °C), OTP security register availability, and DFN-8 (2 × 3 mm) package compatibility with high-density PCB layouts.

Technical Context

The AT25FF161A-SSHN-B implements a flexible SPI command set compliant with JEDEC JESD216 SFDP v1.6, enabling auto-configuration of read modes (1-1-1, 1-1-2, 1-1-4, 1-4-4, 0-4-4) and burst wrap control. Its memory architecture includes uniform 4-kB sectors and configurable protection via status registers and individual block lock commands.

It supports nested erase/program suspend-resume operations, hardware reset (JEDEC-compliant), and dual power-down states-Deep Power-Down (8.2 µA) and Ultra-Deep Power-Down (5–7 nA)-with fast resume (<10 µs). The device integrates five non-volatile status registers, three 128-byte OTP security registers, and a factory-programmed 128-byte unique ID.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	16 Mbit (2 MB) - sufficient for boot firmware, configuration data, and small RTOS images in space-constrained designs.
Supply Voltage	1.65 V – 3.75 V - enables single-rail operation across 1.8 V and 3.3 V systems without level-shifting.
Max Clock Frequency	133 MHz (1-4-4 mode) - achieves ~66.5 MB/s effective read bandwidth for XiP-critical applications.
Erase Granularity	4-kB / 32-kB / 64-kB blocks + full chip - allows fine-grained firmware updates without disturbing adjacent code sections.
Endurance & Retention	100,000 cycles / 10 years @ −40 °C to +105 °C - validated for automotive-grade and extended-life industrial deployments.
Power-Down Current	5–7 nA (Ultra-Deep) - extends battery life in always-on IoT edge nodes during extended sleep intervals.
Temperature Range	−40 °C to +105 °C - qualified for under-hood automotive, industrial motor drives, and outdoor infrastructure equipment.

Pinout & Package

AT25FF161A-SSHN-B is packaged in an 8-pad, 2 × 3 × 0.6 mm DFN (Dual Flat No-lead) with wettable flank terminations, optimized for automated optical inspection (AOI) and high-reliability reflow.

Pin/Terminal	Circuit Role	Design Meaning
1 - /CS	Chip Select	Active-low enable for SPI command initiation; supports daisy-chaining in multi-device buses.
2 - DO / IO1	Data Output / Quad I/O Line 1	Primary output in standard read; bidirectional in quad I/O (1-4-4/XiP) mode.
3 - /WP	Write Protect	Hardware-enabled sector protection; tied low to disable write/erase on protected blocks.
4 - GND	Ground	Reference return path for all I/O and core logic; requires low-inductance connection to minimize noise coupling.
5 - SI / IO0	Serial Input / Quad I/O Line 0	Command/address input in standard SPI; bidirectional in quad I/O mode for full-duplex transfers.
6 - SO / IO2	Serial Output / Quad I/O Line 2	Secondary data line in dual/quad output; active during 1-1-2 and 1-1-4 reads.
7 - /HOLD	Hold Control	Suspends ongoing SPI transfer without deselecting device; retains bus state for low-latency resumption.
8 - VCC	Power Supply	Single 1.65–3.75 V supply; decoupling capacitor (100 nF) required within 3 mm of pin per layout guidelines.

Key Features

Feature	Design Value
eXecute-in-Place (XiP) support	Enables direct CPU instruction fetch from flash via 0-4-4 continuous read mode, eliminating RAM copy overhead and reducing boot latency by >40%.
Quad I/O (1-4-4) interface	Doubles effective throughput vs. dual-output mode; eliminates address/command retransmission for sequential bursts, critical for real-time firmware streaming.
Three 128-byte OTP security registers	Provide immutable storage for cryptographic keys, device certificates, or calibration data-locked permanently after programming to prevent tampering.
User-configurable I/O drive strength	Allows dynamic adjustment of output slew rate to match trace impedance, reducing EMI and signal integrity issues on long or noisy PCB traces.
Individual block protection	Permits selective locking of 4-kB sectors (e.g., bootloader region) while leaving application zones writable-enabling secure OTA update architectures.
Ultra-Deep Power-Down (UDPD)	Reduces quiescent current to 5–7 nA with sub-10 µs wake-up, making it suitable for energy-harvesting sensors and battery-powered edge nodes with multi-year runtime targets.

Applications

Firmware Storage in Automotive ECUs	Secure Bootloader in Industrial PLCs
Use Scenario: Stores engine control firmware and calibration tables in modern automotive powertrain modules requiring AEC-Q100 Grade 2 qualification. IC Role / Device Role / Timing Role: Non-volatile program memory with XiP capability and −40 °C to +105 °C operation, directly executing safety-critical startup routines. Use Value: Eliminates external RAM dependency for boot code, reduces BOM count, and meets ASIL-B functional safety requirements via OTP-secured boot vector.	Use Scenario: Hosts signed bootloader image and public key certificate in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for root-of-trust assets; leverages individual block lock and OTP registers to enforce chain-of-trust verification. Use Value: Prevents unauthorized firmware modification during field updates, satisfying IEC 62443-3-3 SL2 cybersecurity requirements for industrial control systems.
Low-Power IoT Edge Node Memory	Wi-Fi/BLE Module Configuration Storage
Use Scenario: Retains sensor fusion algorithms and network credentials in battery-powered environmental monitoring nodes operating for >5 years on coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-power serial flash providing 5–7 nA UDPD current and fast wake-up for intermittent sensing duty cycles. Use Value: Extends operational lifetime beyond 60 months at 1% duty cycle, outperforming standard SPI flash by >10× in deep-sleep energy efficiency.	Use Scenario: Stores MAC address, RF calibration data, and wireless stack configuration parameters in compact Wi-Fi 6 and Bluetooth LE modules. IC Role / Device Role / Timing Role: High-speed, small-footprint memory supporting 133 MHz quad I/O reads for rapid radio initialization and channel hopping sequences. Use Value: Reduces module boot time by 35% compared to 1-1-1 SPI interfaces, accelerating connection establishment in time-sensitive mesh networks.

Firmware Storage in Automotive ECUs

Secure Bootloader in Industrial PLCs

Use Scenario: Stores engine control firmware and calibration tables in modern automotive powertrain modules requiring AEC-Q100 Grade 2 qualification.

IC Role / Device Role / Timing Role: Non-volatile program memory with XiP capability and −40 °C to +105 °C operation, directly executing safety-critical startup routines.

Use Value: Eliminates external RAM dependency for boot code, reduces BOM count, and meets ASIL-B functional safety requirements via OTP-secured boot vector.

Use Scenario: Hosts signed bootloader image and public key certificate in programmable logic controllers deployed in factory automation environments.

IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for root-of-trust assets; leverages individual block lock and OTP registers to enforce chain-of-trust verification.

Use Value: Prevents unauthorized firmware modification during field updates, satisfying IEC 62443-3-3 SL2 cybersecurity requirements for industrial control systems.

Low-Power IoT Edge Node Memory

Wi-Fi/BLE Module Configuration Storage

Use Scenario: Retains sensor fusion algorithms and network credentials in battery-powered environmental monitoring nodes operating for >5 years on coin-cell batteries.

IC Role / Device Role / Timing Role: Ultra-low-power serial flash providing 5–7 nA UDPD current and fast wake-up for intermittent sensing duty cycles.

Use Value: Extends operational lifetime beyond 60 months at 1% duty cycle, outperforming standard SPI flash by >10× in deep-sleep energy efficiency.

Use Scenario: Stores MAC address, RF calibration data, and wireless stack configuration parameters in compact Wi-Fi 6 and Bluetooth LE modules.

IC Role / Device Role / Timing Role: High-speed, small-footprint memory supporting 133 MHz quad I/O reads for rapid radio initialization and channel hopping sequences.

Use Value: Reduces module boot time by 35% compared to 1-1-1 SPI interfaces, accelerating connection establishment in time-sensitive mesh networks.

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-SN	16 Mbit, 1.7–2.0 V only; no UDPD mode; max 104 MHz (1-1-4); lacks OTP registers and SFDP v1.6 support.	Limited to 1.8 V systems; unsuitable for wide-voltage or ultra-low-power designs requiring <10 nA sleep current.	Select when cost sensitivity outweighs voltage flexibility and security needs; verify compatibility with existing 1.8 V rail and absence of XiP requirement.
Micron MT25QL128ABA8ESF-0SIT	128 Mbit density; 1.7–2.0 V; 133 MHz (1-4-4); includes SFDP v1.6 and UDPD (1 µA), but no OTP registers or factory UID.	Higher density for complex firmware; lacks hardware-level security primitives needed for secure boot implementations.	Prefer for large-code applications where OTP and UID are not required; confirm board layout accommodates larger 8-pin SOIC package vs. DFN-8 footprint.

Compared with W25Q16JW-SN and MT25QL128ABA8ESF-0SIT, the AT25FF161A-SSHN-B uniquely combines ultra-wide voltage range (1.65–3.75 V), sub-10 nA UDPD, factory UID, and three OTP registers-making it the only option among the three qualified for secure, battery-constrained, multi-rail embedded systems.

Availability

AT25FF161A-SSHN-B is available at Aetrix Electronics and suitable for automotive ECU firmware storage, industrial PLC secure bootloaders, and low-power IoT edge node memory requiring stable component supply across extended temperature and voltage ranges.

Supply support for AT25FF161A-SSHN-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 automotive, industrial, and IoT markets.

The AT25FF161A-SSHN-B belongs to Renesas' AT25FF family of high-performance serial flash devices engineered for secure, low-power, and multi-voltage embedded applications demanding XiP, robust data retention, and hardware-based security.

FAQ

What is the operating voltage range of the AT25FF161A-SSHN-B?

The AT25FF161A-SSHN-B operates across a wide voltage range of 1.65 V to 3.75 V, enabling seamless integration into both 1.8 V and 3.3 V system rails without external level shifters. This dual-voltage compatibility simplifies design reuse across product families and supports brown-out resilience down to 1.65 V during power transitions.

Does the AT25FF161A-SSHN-B support eXecute-in-Place (XiP)?

Yes, the AT25FF161A-SSHN-B fully supports XiP via its 0-4-4 continuous read mode, which eliminates repeated command transmission and enables true instruction fetch directly from flash. This capability reduces boot latency and eliminates the need for external RAM buffering in resource-constrained microcontroller applications.

How many OTP security registers does the AT25FF161A-SSHN-B include?

The AT25FF161A-SSHN-B includes three 128-byte One-Time Programmable (OTP) security registers, each independently lockable. These registers are used to store cryptographic keys, device-specific certificates, or calibration data that must remain immutable after initial programming-critical for secure boot and anti-counterfeiting schemes.

What is the minimum deep power-down current for the AT25FF161A-SSHN-B?

The AT25FF161A-SSHN-B achieves an ultra-low 5–7 nA current in Ultra-Deep Power-Down (UDPD) mode, verified across −40 °C to +105 °C. This enables multi-year battery operation in energy-harvesting and intermittently active sensor nodes, far exceeding standard SPI flash offerings.

Is the AT25FF161A-SSHN-B compatible with JEDEC-standard hardware reset?

Yes, the AT25FF161A-SSHN-B implements JEDEC-standard hardware reset functionality, allowing synchronous recovery from program/erase errors or bus contention events. The reset sequence is defined in Section 5.12 of the datasheet and ensures deterministic state restoration without requiring SPI command intervention.

AT25FF161A-SSHN-B Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm 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-SSHN-B FAQ

1.How can I place an order for AT25FF161A-SSHN-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AT25FF161A-SSHN-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-SSHN-B reliable?

The price and inventory of AT25FF161A-SSHN-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-SSHN-B is usually 5 days.

3.What payment methods are accepted for AT25FF161A-SSHN-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25FF161A-SSHN-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT25FF161A-SSHN-B?

AT25FF161A-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT25FF161A-SSHN-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-SSHN-B?

For technical support, including AT25FF161A-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25FF161A-SSHN-B requirements.

6.How does Aetrix verify that AT25FF161A-SSHN-B is sourced from the original manufacturer or authorized distributors?

All AT25FF161A-SSHN-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-SSHN-B meets industry standards.

7.What is the process for return or replacement of AT25FF161A-SSHN-B?

All AT25FF161A-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25FF161A-SSHN-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-SSHN-B part is unused and in its original packaging.

Return procedure for AT25FF161A-SSHN-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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