Infineon Technologies S25FL164K0XBHI023

Overview

S25FL164K0XBHI023 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 up to 108 MHz and 54 MB/s continuous data transfer. It features uniform 4 kB sector and 64 kB block erase, 100K program-erase cycles, 20-year data retention, and hardware/software write protection. Used in embedded boot code storage and firmware update storage for industrial controllers.

For engineers reviewing the S25FL164K0XBHI023 datasheet, S25FL164K0XBHI023 pinout, S25FL164K0XBHI023 application, or S25FL164K0XBHI023 equivalent, key selection criteria include quad I/O read performance, security register OTP protection, industrial-plus temperature support (−40 °C to +105 °C), and migration path to S25FL064L.

Technical Context

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

The memory integrates three 256-byte one-time-programmable (OTP) security registers, pointer-based block protection, and dual protection mechanisms-hardware WP#/HOLD# pins plus software command lock-down until power cycle. It operates across 2.6 V–3.6 V supply and supports AEC-Q100 Grade 2 automotive qualification.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (208 mil), body size 5.3 mm × 5.3 mm, standard JEDEC MS-012AC footprint (SOC008).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL164K0XBHI023, S25FL064L offers higher speed and longer-term availability, while MX25L6433F provides lower cost but omits OTP registers and suspend-resume-making it unsuitable for secure or real-time update applications.

Availability

S25FL164K0XBHI023 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and networking equipment configuration requiring stable component supply despite end-of-life status.

Supply support for S25FL164K0XBHI023 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 PSoC, Traveo, and serial flash memory families.

The S25FL1-K family was designed for high-reliability, space-constrained embedded systems requiring robust firmware storage with security, XIP capability, and industrial temperature operation-targeting industrial automation, medical, and automotive applications.

FAQ

Is S25FL164K0XBHI023 still recommended for new designs?

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

What does the 'X' in S25FL164K0XBHI023 indicate?

The 'X' denotes Industrial Plus temperature grade (−40 °C to +105 °C), confirmed in the datasheet's ordering information table. The 'B' indicates SOIC 208-mil package (SOC008), 'H' specifies lead-free and RoHS-compliant finish, and 'I023' is the tape-and-reel packaging variant per Cypress's internal coding.

Does S25FL164K0XBHI023 support Execute-In-Place (XIP)?

Yes. It supports efficient XIP via Continuous Read and Wrapped Read modes, with Quad Read achieving 54 MB/s-sufficient to feed ARM Cortex-M7 or RISC-V cores without instruction cache stalls. XIP performance is validated across the full −40 °C to +105 °C range with no timing derating.

Can the security registers be reprogrammed after initial programming?

No. The three 256-byte security registers are one-time-programmable (OTP). Once any bit is set to '0', it cannot be changed back to '1'. This ensures cryptographic keys, device IDs, or calibration data remain immutable after factory programming-critical for regulatory compliance and anti-tampering.