Infineon Technologies S25FL164K0XMFBQ10

Overview

S25FL164K0XMFBQ10 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 is used for XIP code execution and firmware storage in space-constrained embedded controllers.

For engineers reviewing the S25FL164K0XMFBQ10 datasheet, S25FL164K0XMFBQ10 pinout, S25FL164K0XMFBQ10 application, or S25FL164K0XMFBQ10 equivalent, key selection considerations include quad-speed read performance, hardware/software write protection modes, SFDP compliance, security register configuration, and migration path to S25FL064L for new designs.

Technical Context

The S25FL164K0XMFBQ10 implements a 90 nm floating-gate architecture with SPI Multi-I/O support - including Single, Dual, and Quad I/O protocols - using only six pins (CS#, SCK, IO0–IO3) and enabling up to 54 MB/s continuous read throughput. Its command set is backward-compatible with prior S25FL-K families but omits legacy commands like Quad Page Program (32h) and Half-Block Erase (52h).

It integrates volatile and non-volatile configuration registers, supports Execute-In-Place (XIP) via Continuous and Wrapped Read modes, and provides dual-layer data protection: hardware-based WP#/HOLD# inputs plus software-controlled status register bits, OTP lock-down, and pointer-based block protection for top/bottom memory ranges.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (300 mil), body size 10.16 mm × 7.62 mm, JEDEC MS-001AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL164K0XMFBQ10, S25FL064L offers higher speed and longevity but requires PCB redesign, while MX25L6433F provides drop-in voltage/package compatibility at lower security assurance - making the original optimal only for legacy maintenance, not new development.

Availability

S25FL164K0XMFBQ10 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster boot memory, and medical diagnostic device parameter table applications requiring stable component supply despite end-of-life status.

Supply support for S25FL164K0XMFBQ10 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 long-term data retention over raw density.

FAQ

Is S25FL164K0XMFBQ10 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, it has been retired from active roadmap development and lacks long-term availability guarantees.

What package does S25FL164K0XMFBQ10 use, and is it RoHS compliant?

S25FL164K0XMFBQ10 uses a 16-lead SOIC (300 mil) package per JEDEC MS-001AC, with body dimensions 10.16 mm × 7.62 mm. It is RoHS-compliant and halogen-free, meeting IPC/JEDEC J-STD-020 moisture sensitivity level MSL-3 at 260 °C peak reflow.

Does this device support Quad SPI mode with WP# and HOLD# disabled?

Yes. When Quad I/O mode is enabled (via Status Register bit 1), the WP# and HOLD# functions are internally disabled and their pins repurposed as IO2 and IO3. This is mandatory for full Quad operation and documented in Section 2.7–2.8 of the datasheet.

Can the 8-byte unique ID be read repeatedly without wear impact?

Yes. The 8-byte unique ID is stored in one-time-programmable (OTP) silicon and read-only via the Read Unique ID command (though this specific command is not supported on S25FL164K). Instead, the ID is accessed via SFDP or Security Register reads - all read operations are non-destructive and do not affect endurance.