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

Renesas AT25FF161A-SSHN-T

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

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Part No.:: AT25FF161A-SSHN-T

Manufacturer:: Renesas

Category:: Memory

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

Datasheet:: AT25FF161A-SSHN-T.pdf

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

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Product details

Overview

AT25FF161A-SSHN-T 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 Ultra-Deep Power-Down current. It is used for firmware storage and direct code execution in industrial microcontroller boot systems.

For engineers reviewing the AT25FF161A-SSHN-T datasheet, AT25FF161A-SSHN-T pinout, AT25FF161A-SSHN-T application, or AT25FF161A-SSHN-T equivalent, key selection criteria include XiP support, multi-I/O timing compliance, deep power-down leakage, JEDEC SFDP compatibility, and factory-programmed UID for secure boot traceability.

Technical Context

The AT25FF161A-SSHN-T implements a dual-bank architecture with independent erase/program suspend/resume capability, enabling concurrent background operations. Its command set includes standardized SPI modes (0/3), dual-output (1-1-2), quad-output (1-1-4), quad I/O (1-4-4), and XiP (0-4-4) with burst wrap support.

It integrates five status registers (SR1–SR5) with non-volatile/volatile variants, OTP security registers (3 × 128-byte), and hardware reset via dedicated /RESET pin or JEDEC-standard command sequence. Memory protection supports individual block lock, global lock, and user-definable protected regions at array start/end.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	16 Mbit (2 MB) - sufficient for full MCU firmware images and configuration data in space-constrained embedded designs.
Supply Voltage Range	1.65 V – 3.75 V - enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level-shifting.
Max Clock Frequency	133 MHz (1-4-4 mode) - achieves >50 MB/s effective read bandwidth 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 extended sleep intervals.
Data Retention	20 years @ −40 °C to +85 °C - meets long-lifecycle requirements for industrial control and automotive infotainment modules.
Endurance	100,000 program/erase cycles - supports frequent field firmware upgrades over product lifetime.

Pinout & Package

AT25FF161A-SSHN-T is supplied in an 8-lead, 150-mil narrow SOIC package (JEDEC MS-012AA), RoHS-compliant and halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
/CS	Chip Select	Active-low enable for SPI command/address/data transfer; must remain low for entire transaction duration.
DO (IO1)	Data Output / I/O 1	Primary serial output in standard/dual/quad modes; bidirectional in quad I/O/XiP for address/data multiplexing.
/WP	Write Protect	Hardware-enabled sector protection; tied low to allow write/erase, high to lock protected memory regions.
/HOLD	Hold Input	Suspends ongoing SPI transfer without deselecting device; retains internal state for resumed communication.
CLK	Clock Input	Drives all SPI timing; supports up to 133 MHz in quad I/O mode with precise setup/hold margin requirements.
DI (IO0)	Data Input / I/O 0	Serial input in standard/quad modes; bidirectional in quad I/O/XiP for command/address/data transmission.
/RESET	Hardware Reset	Asynchronous active-low pin that forces device into known state; supports JEDEC-standard reset protocol.
VSS	Ground	Reference return path for all I/O and core logic; requires low-impedance connection to minimize noise coupling.

Key Features

Feature	Design Value
Quad I/O & XiP Support	Enables 0-4-4 continuous read mode with no opcode overhead, reducing instruction fetch latency by >40% vs. standard SPI.
Erase/Program Suspend	Allows interrupting long erase/program operations to service time-critical reads, then resuming without data loss.
Factory UID + OTP Registers	128-byte unique ID and three 128-byte one-time programmable registers provide immutable device identity and secure key storage.
Multi-Level Power-Down	Three low-power states (standby/DPD/UDPD) let designers optimize energy use per system activity profile-e.g., UDPD for >10-year battery life.
JEDEC SFDP Compliance	Standardized parameter table (5Ah command) enables automatic host driver configuration without hard-coded timing assumptions.

Applications

Firmware Storage for Industrial PLCs	Secure Boot in Medical Edge Devices
Use Scenario: Storing and updating firmware for programmable logic controllers operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile program memory providing reliable boot code and runtime configuration with 10-year retention at +105 °C. Use Value: Supports field-upgradable firmware via 4-kB block erase, minimizing downtime; 100,000-cycle endurance ensures longevity across maintenance cycles.	Use Scenario: Enabling cryptographic verification of bootloader integrity before execution in FDA-class II medical sensors. IC Role / Device Role / Timing Role: Secure storage for public keys and signed firmware signatures using OTP registers and factory UID. Use Value: Prevents unauthorized firmware injection; OTP lock prevents tampering post-programming, meeting IEC 62304 security requirements.
eXecute-in-Place (XiP) in Automotive ADAS	Low-Power IoT Sensor Node Firmware
Use Scenario: Direct execution of image processing algorithms from flash in automotive camera modules to reduce RAM footprint and BOM cost. IC Role / Device Role / Timing Role: High-speed XiP memory delivering sustained >50 MB/s read throughput in 0-4-4 mode at 133 MHz. Use Value: Eliminates need for external SDRAM; reduces system power and latency versus copy-to-RAM architectures.	Use Scenario: Storing sensor calibration data and firmware in battery-powered environmental monitors deployed for multi-year deployments. IC Role / Device Role / Timing Role: Ultra-low-leakage non-volatile memory with 5–7 nA UDPD current enabling >10-year shelf life on coin-cell batteries. Use Value: Extends operational lifetime without maintenance; supports over-the-air updates via 32-kB block erase without disrupting sensor sampling.

Firmware Storage for Industrial PLCs

Secure Boot in Medical Edge Devices

Use Scenario: Storing and updating firmware for programmable logic controllers operating in harsh environments with wide temperature swings.

IC Role / Device Role / Timing Role: Non-volatile program memory providing reliable boot code and runtime configuration with 10-year retention at +105 °C.

Use Value: Supports field-upgradable firmware via 4-kB block erase, minimizing downtime; 100,000-cycle endurance ensures longevity across maintenance cycles.

Use Scenario: Enabling cryptographic verification of bootloader integrity before execution in FDA-class II medical sensors.

IC Role / Device Role / Timing Role: Secure storage for public keys and signed firmware signatures using OTP registers and factory UID.

Use Value: Prevents unauthorized firmware injection; OTP lock prevents tampering post-programming, meeting IEC 62304 security requirements.

eXecute-in-Place (XiP) in Automotive ADAS

Low-Power IoT Sensor Node Firmware

Use Scenario: Direct execution of image processing algorithms from flash in automotive camera modules to reduce RAM footprint and BOM cost.

IC Role / Device Role / Timing Role: High-speed XiP memory delivering sustained >50 MB/s read throughput in 0-4-4 mode at 133 MHz.

Use Value: Eliminates need for external SDRAM; reduces system power and latency versus copy-to-RAM architectures.

Use Scenario: Storing sensor calibration data and firmware in battery-powered environmental monitors deployed for multi-year deployments.

IC Role / Device Role / Timing Role: Ultra-low-leakage non-volatile memory with 5–7 nA UDPD current enabling >10-year shelf life on coin-cell batteries.

Use Value: Extends operational lifetime without maintenance; supports over-the-air updates via 32-kB block erase without disrupting sensor sampling.

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, 1.7–2.0 V supply only; lacks UDPD mode (<1 µA DPD); no factory UID; supports only 1-1-4/1-4-4 (no 0-4-4 XiP).	Targeted at cost-sensitive consumer devices where ultra-low power and secure boot are not required.	Select when voltage range is fixed at 1.8 V and XiP performance is secondary to unit cost.
Micron MT25QL128ABA	128 Mbit density; 1.7–2.0 V only; supports 133 MHz 1-4-4 but no 0-4-4 XiP; includes 64-byte UID (not 128-byte); higher active current (12 mA).	Suitable for high-capacity boot storage in networking equipment requiring larger firmware images.	Choose when >16 Mbit capacity is needed and system operates exclusively at 1.8 V with no requirement for sub-µA deep sleep.

Compared with W25Q16JW and MT25QL128ABA, the AT25FF161A-SSHN-T uniquely combines ultra-wide voltage (1.65–3.75 V), 0-4-4 XiP, 128-byte UID, and 5–7 nA UDPD-making it optimal for battery-powered, multi-rail, and secure boot-critical designs where flexibility and longevity outweigh raw density or lowest unit price.

Availability

AT25FF161A-SSHN-T is available at Aetrix Electronics and suitable for industrial automation, medical edge computing, automotive ADAS, and battery-powered IoT sensor node applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

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

The AT25FF161A belongs to Renesas' high-reliability serial flash memory product line, engineered for robust operation across extended temperature ranges (−40 °C to +105 °C) and demanding firmware storage, XiP, and secure boot applications.

FAQ

What is the maximum clock frequency supported by the AT25FF161A-SSHN-T in quad I/O mode?

The AT25FF161A-SSHN-T supports up to 133 MHz in 1-4-4 quad I/O mode under 1.65–3.75 V and −40 °C to +85 °C conditions. This enables sustained read bandwidth exceeding 50 MB/s, critical for eXecute-in-Place (XiP) performance in resource-constrained embedded systems. The AT25FF161A-SSHN-T maintains full functionality across its rated voltage and temperature range without derating.

Does the AT25FF161A-SSHN-T support true eXecute-in-Place (XiP) operation?

Yes, the AT25FF161A-SSHN-T supports true XiP via its 0-4-4 command format, which eliminates opcode transmission overhead and enables continuous burst reads. This allows microcontrollers to execute code directly from flash without copying to RAM, reducing latency and system memory requirements. The AT25FF161A-SSHN-T's quad I/O architecture and burst wrap feature ensure deterministic timing for real-time XiP use cases.

How does the AT25FF161A-SSHN-T implement ultra-low-power operation?

The AT25FF161A-SSHN-T offers three power-down states: standby (30 µA), Deep Power-Down (8.2 µA), and Ultra-Deep Power-Down (5–7 nA). UDPD is entered via the 79h command and exited with ABh, preserving all register states. This enables multi-year battery life in always-on IoT nodes. The AT25FF161A-SSHN-T achieves this without sacrificing wake-up speed or data retention integrity.

What security features are integrated into the AT25FF161A-SSHN-T?

The AT25FF161A-SSHN-T includes a factory-programmed 128-byte unique identifier, three 128-byte One-Time Programmable (OTP) security registers, individual and global block protection, and status register locking. OTP registers can store cryptographic keys or certificates and are permanently locked after programming. These features collectively support secure boot, firmware authentication, and anti-cloning in regulated applications. The AT25FF161A-SSHN-T implements them without external security co-processors.

Is the AT25FF161A-SSHN-T compatible with JEDEC-standard serial flash protocols?

Yes, the AT25FF161A-SSHN-T complies fully with JEDEC JESD216 (SFDP), JESD252 (manufacturer/device ID), and JESD22-A107 (reliability). It responds to standard commands including 9Fh (JEDEC ID), 5Ah (SFDP), and 90h/94h (manufacturer/device ID). This ensures interoperability with generic flash drivers and simplifies migration from other JEDEC-compliant serial flash devices. The AT25FF161A-SSHN-T's SFDP table provides accurate, versioned timing parameters for automated host configuration.

AT25FF161A-SSHN-T Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

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

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:: 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-T FAQ

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

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

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your AT25FF161A-SSHN-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 AT25FF161A-SSHN-T?

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

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

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

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

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

Return procedure for AT25FF161A-SSHN-T:

1.Submit a request within 90 days.

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

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