Infineon Technologies S25FL164K0XBHI020

Overview

S25FL164K0XBHI020 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 S25FL164K0XBHI020 datasheet, S25FL164K0XBHI020 pinout, S25FL164K0XBHI020 application, or S25FL164K0XBHI020 equivalent, key selection criteria include quad I/O read bandwidth, industrial-plus temperature support, hardware write protection via WP#/HOLD#, 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 (Single/Dual/Quad I/O) command set compatibility to prior FL-K families. It supports JEDEC-standard SFDP v1.5 for parameter discovery and uses a dual-latch status register with volatile/non-volatile configuration options.

Memory organization comprises 128 uniform 64 kB blocks (8,192 × 4 kB sectors), with dedicated security registers mapped at fixed addresses. The interface supports clock polarity/phase modes 0 and 3, and includes suspend/resume for both program and erase operations - critical for real-time firmware updates without system interruption.

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 S25FL064L and MX25L6433F, the S25FL164K0XBHI020 offers unique Industrial Plus temperature support and 4 kB sector erase - critical for incremental firmware patching - but is discontinued; migration to S25FL064L is mandatory for long-term supply assurance.

Availability

S25FL164K0XBHI020 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot memory, and medical imaging device code storage requiring stable component supply despite end-of-life status.

Supply support for S25FL164K0XBHI020 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 microcontrollers, connectivity solutions, and non-volatile memory for embedded systems.

The S25FL1-K family was designed for high-reliability, SPI-based code storage in resource-constrained industrial and automotive applications - emphasizing XIP performance, security, and extended temperature operation before successor S25FL-L series introduction.

FAQ

Is S25FL164K0XBHI020 still recommended for new designs?

No. Cypress explicitly states this part is "Not Recommended for New Design" and has been superseded by the S25FL064L family. While functional and available through authorized channels, it is obsolete for new projects due to discontinuation and lack of future supply assurance. Migration guidance and pin-compatible footprints are documented in Cypress Application Note AN98592.

What are the valid operating temperature grades for S25FL164K0XBHI020?

The "I020" suffix denotes Industrial Plus grade: –40 °C to +105 °C. This is confirmed in the ordering information table (page 84) and electrical characteristics section (page 21) of the datasheet. It is qualified per AEC-Q100 Grade 2 for automotive use but not Grade 1 (–40°C to +125°C).

Does S25FL164K0XBHI020 support Quad SPI (QSPI) mode with WP# and HOLD# active?

No. When Quad I/O (QIO) mode is enabled, the WP# and HOLD# functions are disabled per datasheet section 2.7–2.8 and Figure 1-1. These pins become IO2 and IO3 for data transfer. Hardware write protection must be managed via software commands (e.g., Write Status Register) in QIO mode.

How is the 8-byte unique ID accessed on S25FL164K0XBHI020?

The 8-byte unique ID is read using the Read Unique ID command (ABh), which outputs 8 bytes starting from address 0x00. This command is supported per datasheet section 8.5 and Table 8-10. Unlike some newer flashes, it does not require SFDP parsing or extended address modes - direct single-command access is guaranteed.