Infineon Technologies S25FL164K0XBHVS33

Overview

S25FL164K0XBHVS33 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 boot code storage for industrial controllers.

For engineers reviewing the S25FL164K0XBHVS33 datasheet, S25FL164K0XBHVS33 pinout, S25FL164K0XBHVS33 application, or S25FL164K0XBHVS33 equivalent, key selection criteria include quad-speed XIP capability, AEC-Q100 Grade 2 qualification, SFDP compliance, and migration path to S25FL064L for new designs.

Technical Context

This device implements a 90 nm floating-gate NOR architecture with SPI-MIO support for Single/Dual/Quad I/O protocols. Its command set is backward-compatible with S25FL-K and S25FL-P families but omits legacy commands like Quad Page Program (32h) and Half-Block Erase (52h).

The memory includes dual-mode configuration (volatile/non-volatile), programmable dummy cycles for latency optimization, and pointer-based block protection (S25FL132K/S25FL164K only). Security relies on OTP registers, lock-down-on-power-cycle, and hardware WP#/HOLD# pins that disable under Quad I/O mode.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (208 mil), SOIC-8 wide-body (SOC008 footprint), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL164K0XBHVS33, S25FL064L0XBHIS33 delivers 23% higher read bandwidth and long-term availability, while MX25L6433FZNI-10G trades security and temperature range for lower unit cost - making it viable only in non-safety-critical commercial use cases.

Availability

S25FL164K0XBHVS33 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging UI controller applications requiring stable component supply despite end-of-life status.

Supply support for S25FL164K0XBHVS33 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) designs high-performance, reliable semiconductor solutions for embedded systems, automotive, and industrial markets.

The S25FL1-K family targets cost-optimized, high-reliability serial NOR flash applications demanding XIP, security, and extended temperature operation - specifically engineered for firmware storage in resource-constrained edge devices.

FAQ

Is S25FL164K0XBHVS33 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 adopt S25FL064L for guaranteed long-term availability, improved performance, and updated SFDP compliance.

What are the critical differences between S25FL164K and S25FL064L?

S25FL064L offers 133 MHz Quad Read (vs. 108 MHz), 65 nm process (vs. 90 nm), JEDEC JESD216D SFDP v1.6 support, and identical SOIC-8 packaging. It retains all security features and command compatibility but removes legacy unsupported opcodes and adds enhanced deep power-down timing control.

Does S25FL164K0XBHVS33 support AEC-Q100 qualification?

Yes - it is qualified to AEC-Q100 Grade 2 (–40 °C to +105 °C) and Grade 3 (–40 °C to +85 °C). This qualification covers stress testing for automotive environments including thermal cycling, humidity, and ESD, making it suitable for ADAS and body control modules where full automotive-grade reliability is mandated.

Can WP# and HOLD# be used simultaneously with Quad I/O mode?

No. When Quad I/O mode is enabled (via Status Register bit 6), the WP# and HOLD# pins are repurposed as IO2 and IO3, disabling hardware write protection and hold functionality. Software-based protection (via status register bits) remains active and must be used instead for secure operation in Quad mode.