Infineon Technologies S25FL164K0XMFB003

Overview

S25FL164K0XMFB003 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) and features three 256-byte OTP security registers, 8-byte unique ID, and hardware/software write protection - deployed in embedded boot code storage and firmware update systems.

For engineers reviewing the S25FL164K0XMFB003 datasheet, S25FL164K0XMFB003 pinout, S25FL164K0XMFB003 application, or S25FL164K0XMFB003 equivalent, key selection criteria include quad-mode read throughput, sector-level erase granularity, security register configurability, temperature-grade compliance, and migration path to S25FL064L for new designs.

Technical Context

This device implements a JEDEC-standard SPI interface with configurable clock polarity/phase (modes 0 and 3), supporting Normal, Fast, Dual, and Quad Read commands. Its internal architecture uses 90 nm floating gate technology and includes dedicated XIP-optimized continuous/wrapped read modes with variable dummy cycle latency.

The memory array is organized into uniform 4 kB sectors and 64 kB blocks, with full support for Program/Erase Suspend & Resume, SFDP (JESD216B), and pointer-based block protection. Security functions are enforced via non-volatile status register bits, hardware WP#/HOLD# pins, and lock-down-until-power-cycle behavior.

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 S25FL164K0XMFB003, S25FL064L offers higher speed and longer endurance but requires design migration, while MX25L6433F provides basic functionality at lower cost but omits Industrial Plus qualification and advanced security features essential for industrial firmware storage.

Availability

S25FL164K0XMFB003 is available at Aetrix Electronics and suitable for embedded boot code storage, firmware update partitions, secure key vaults, and configuration data retention requiring stable component supply and long-term obsolescence management.

Supply support for S25FL164K0XMFB003 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 global leader in embedded system solutions, specializing in programmable chips, memory, and connectivity ICs for industrial, automotive, and IoT applications.

The S25FL1-K family was designed specifically for high-reliability embedded systems needing fast, secure, and temperature-robust serial NOR flash - bridging the gap between legacy parallel NOR and modern low-pin-count memory interfaces.

FAQ

Is S25FL164K0XMFB003 still recommended for new designs?

No. Cypress explicitly states this part is "Not Recommended for New Design" and identifies S25FL064L as the factory-recommended migration path. While fully functional and supported for existing production, new projects should adopt the S25FL-L family for guaranteed long-term availability, improved specs, and updated documentation.

What package does S25FL164K0XMFB003 use, and is it pin-compatible with other S25FL1-K variants?

S25FL164K0XMFB003 uses an 8-lead SOIC (208 mil) package (SOC008). It shares footprint compatibility with S25FL132K in the same package, but differs from S25FL116K (which uses 150-mil SOIC) and S25FL164K variants in WSON or BGA. Pin assignments are identical across all SOIC-packaged S25FL1-K devices.

Does this device support Execute-in-Place (XIP), and what features optimize it?

Yes. XIP is enabled via Quad Read mode at 108 MHz (54 MB/s), continuous read mode (8-clock overhead per access), and wrapped read mode (cache-line-efficient refill). These features reduce instruction fetch latency to match or exceed parallel NOR, making it suitable for direct CPU execution without RAM shadowing.

How is security implemented, and can the OTP registers be reprogrammed?

Security relies on three 256-byte OTP registers, 8-byte unique ID, non-volatile status register protection bits, hardware WP#/HOLD# pins, and lock-down-until-power-cycle behavior. Once programmed, OTP registers cannot be erased or rewritten - they are permanently fused. Protection modes are set via software commands or hardware pin states and persist across power cycles.