Infineon Technologies S25FL128P0XNFI011

Overview

S25FL128P0XNFI011 from Cypress Semiconductor is a 128-Mbit, 3.0 V serial NOR Flash memory with uniform 64 KB sectors, SPI interface (104 MHz max), 2.7–3.6 V single-supply operation, and 100,000 program/erase cycles per sector-used for firmware storage in industrial microcontroller boot loaders and embedded BIOS applications.

For engineers reviewing the S25FL128P0XNFI011 datasheet, S25FL128P0XNFI011 pinout, S25FL128P0XNFI011 application, or S25FL128P0XNFI011 equivalent, key selection criteria include sector architecture (64 KB uniform), WP#/ACC-accelerated programming mode (1.2 ms typical), Deep Power Down current (3 µA), and WSON-8 package compatibility with space-constrained PCB layouts.

Technical Context

The S25FL128P0XNFI011 implements a SPI-compatible serial interface supporting Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), with SI/SO single-bit data transfer and optional parallel I/O (PO[7:0]) only on the 16-pin SO variant-not applicable to this WSON-8 part. It uses Cypress's 0.09 µm MirrorBit® process for reliable charge-trapping cell operation.

Memory organization is fixed as 256 uniform 64 KB sectors (128 Mbit total), enabling precise firmware partitioning. Erase commands include SE (20h/D8h) for 64 KB sectors (0.5 s typical) and BE (60h/C7h) for full array (128 s typical), with status register monitoring (WIP bit) for operation completion detection.

Key Specifications

Pinout & Package

Package: 8-contact WSON (6 mm × 8 mm, no lead), with exposed thermal pad (not electrically connected; may be tied to GND with zero potential difference).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128P0XNFI011, the S25FL128S offers higher endurance and speed but requires firmware adaptation, while the MX25L12833F provides functional equivalence at lower cost but sacrifices hardware-accelerated programming and Cypress's MirrorBit® reliability architecture.

Availability

S25FL128P0XNFI011 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, smart meter application code, and automotive body control module applications requiring stable component supply amid legacy design continuity needs.

Supply support for S25FL128P0XNFI011 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 high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.

The S25FL family delivers SPI NOR Flash optimized for embedded code execution and secure firmware storage, emphasizing reliability, sector flexibility, and low-power modes for resource-constrained edge devices.

FAQ

Is S25FL128P0XNFI011 pin-compatible with S25FL128S0XNFI010?

No. While both use the same WSON-8 package and share identical pin assignments, S25FL128S introduces subtle timing and command protocol changes-including revised Deep Power Down entry/exit sequences and updated status register bit definitions-that require firmware validation per Cypress Application Note AN98567 before substitution.

What is the function of the exposed pad on the WSON package?

The exposed central pad on the WSON-8 package is a thermal pad with no electrical connection. It may be soldered to a PCB copper pour tied to GND, provided the pad and GND net maintain 0 mV potential difference; improper routing risks latch-up or parametric shift due to voltage gradients across the die substrate.

Can S25FL128P0XNFI011 operate in Quad SPI mode?

No. The S25FL128P0XNFI011 supports only standard single-I/O SPI (Mode 0 and Mode 3); it does not implement Quad SPI (QSPI) commands or dual/quad I/O protocols. Its SO/SI pins are strictly single-bit serial; PO[7:0] parallel I/O is exclusive to the 16-pin SO variant and not present in this WSON-8 part.

How is hardware write protection enabled on this device?

Hardware write protection is enabled by driving WP#/ACC low *and* setting the Status Register Write Disable (SRWD) bit to '1' via WRSR command. Once set, BP3–BP0 bits become read-only even if WP#/ACC is later released-ensuring boot sectors remain immutable unless SRWD is cleared using the specific 6-byte unlock sequence defined in the datasheet.