Infineon Technologies S25FL164K0XNFIQ11

Overview

S25FL164K0XNFIQ11 from Cypress Semiconductor is a 64-Mbit (8 Mbyte), 3.0 V serial NOR flash memory with SPI Multi-I/O interface, supporting Quad Read at 108 MHz (54 MB/s), uniform 4 kB sector and 64 kB block erase, and 100K program-erase cycles. It operates across –40 °C to +105 °C (Industrial Plus), features three 256-byte OTP security registers, 8-byte unique ID, and Execute-In-Place (XIP) capability for embedded code storage in microcontroller boot applications.

For engineers reviewing the S25FL164K0XNFIQ11 datasheet, S25FL164K0XNFIQ11 pinout, S25FL164K0XNFIQ11 application, or S25FL164K0XNFIQ11 equivalent, key selection criteria include quad-mode read throughput, industrial-plus temperature support, hardware/software write protection granularity, and migration path to S25FL064L for new designs.

Technical Context

This device implements JEDEC-standard SPI Multi-I/O (MIO) with configurable clock polarity/phase (modes 0 and 3), supporting Single, Dual, and Quad I/O protocols using shared IO0–IO3 pins. Command execution includes suspend/resume for both program and erase operations, enabling real-time host interrupt handling without data corruption.

The memory array uses 90 nm floating gate technology with uniform 4 kB sectors and 64 kB blocks, managed via non-volatile and volatile status registers. Security architecture includes pointer-based block protection, top/bottom relative range locking, and lock-down-until-power-cycle enforcement - all controlled by dedicated WP# and HOLD# inputs or software commands.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (208 mil), body size 5.3 mm × 5.3 mm, lead pitch 1.27 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash memory applications.

Compared with S25FL064L0XNFIQ11, this part offers lower read bandwidth and no SFDP v1.6 compliance, but retains legacy command compatibility; versus MX25L6433FZNI-10G, it delivers superior security and real-time update capability at higher cost and end-of-life risk.

Availability

S25FL164K0XNFIQ11 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging device configuration requiring stable component supply despite its Not Recommended for New Design status.

Supply support for S25FL164K0XNFIQ11 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in embedded systems solutions, including microcontrollers, connectivity, and non-volatile memory products for industrial, automotive, and consumer markets.

The S25FL1-K family was designed to deliver high-speed, secure, and temperature-robust SPI NOR flash for code storage in resource-constrained embedded systems - bridging performance between legacy serial flash and parallel NOR while maintaining minimal pin count.

FAQ

Is S25FL164K0XNFIQ11 still in production?

No - Cypress officially retired the S25FL1-K family and designated it "Not Recommended for New Design" as of May 2017. While limited legacy stock may be available through authorized distributors and brokers, Infineon does not manufacture new units. Aetrix Electronics maintains traceable inventory with full lot documentation for existing design continuity support.

What is the function of the HOLD# and WP# pins in Quad I/O mode?

In Quad I/O mode, both HOLD# and WP# functions are disabled per the datasheet: their pins (IO2 and IO3) become dedicated bidirectional data lines (IO2 and IO3). Hardware write protection and command suspension are unavailable during Quad operation - protection must be enforced via software commands and status register configuration instead.

Does S25FL164K0XNFIQ11 support JEDEC-standard SFDP?

Yes - it implements Serial Flash Discoverable Parameters (SFDP) per JEDEC JESD216B in Security Register 0, enabling automatic configuration of read latencies, erase types, and voltage ranges by host bootloaders without hard-coded timing tables - critical for portable firmware across multiple flash vendors.

Can this device replace S25FL132K in the same footprint?

Yes - S25FL164K0XNFIQ11 shares identical 8-lead SOIC (208 mil) package dimensions and pinout with S25FL132K, enabling drop-in replacement in existing PCB layouts. However, firmware must validate 64 Mbit addressing and confirm compatibility with extended security register usage beyond the 32 Mbit variant.