Infineon Technologies S25FL128P0XNFI011M

Overview

S25FL128P0XNFI011M from Cypress Semiconductor is a 128-Mbit, 3.0 V SPI Flash memory with uniform 64 KB sector architecture, 104 MHz max clock rate, and industrial temperature range (–40°C to +85°C) in an 8-pin WSON (6 × 8 mm) package. It supports Page Program (up to 256 bytes), Sector Erase (0.5 s typical), and Deep Power Down (3 µA typical), used for firmware storage and boot code retention in embedded controllers and IoT edge nodes.

For engineers reviewing the S25FL128P0XNFI011M datasheet, S25FL128P0XNFI011M pinout, S25FL128P0XNFI011M application, or S25FL128P0XNFI011M equivalent, key selection criteria include sector granularity (64 KB), WP#/ACC-accelerated programming capability, SO/WSON package compatibility, and migration path to S25FL128S for new designs.

Technical Context

The S25FL128P0XNFI011M implements a serial peripheral interface compliant with SPI Modes 0 and 3 (CPOL=0/CPHA=0 and CPOL=1/CPHA=1), with data latched on SCK rising edge and output on falling edge. It uses Cypress's 0.09 µm MirrorBit® process and supports both standard and accelerated programming via voltage injection on WP#/ACC.

Memory organization comprises 256 uniform 64 KB sectors (128 Mbit total), with block protection controlled by four non-volatile BP bits (BP3–BP0) in the status register. Erase operations are executed via SE (20h/D8h) and BE (60h/C7h) commands, while program verification and operation status are monitored through the WIP bit in the status register.

Key Specifications

Pinout & Package

Package: 8-pin WSON (6 × 8 mm), 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 SPI Flash memory applications.

Compared with S25FL128P0XNFI011M, the S25FL128S offers higher performance and reliability for future designs, while MX25L12833F provides drop-in replacement capability in cost-sensitive applications lacking advanced protection features.

Availability

S25FL128P0XNFI011M is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and smart meter secure configuration requiring stable component supply and long-term obsolescence management.

Supply support for S25FL128P0XNFI011M 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-reliability non-volatile memory and microcontroller solutions for industrial, automotive, and IoT applications.

The S25FL family delivers SPI Flash memory optimized for embedded firmware storage, featuring robust sector protection, low-power modes, and seamless integration with ARM Cortex-M and RISC-V host processors.

FAQ

Is S25FL128P0XNFI011M still recommended for new designs?

No. Cypress explicitly states this part is not recommended for new or current designs. The S25FL128S is the factory-recommended migration path, offering higher clock speed (133 MHz), improved ECC, lower deep power down current (1 µA), and continued production support. Designers should transition to S25FL128S0XNFI011M for all new projects.

What is the function of the WP#/ACC pin beyond write protection?

The WP#/ACC pin serves dual roles: when pulled low, it enables hardware write protection per status register BP bits; when driven to 8.5–9.5 V, it activates accelerated programming mode, reducing typical page program time from 1.5 ms to 1.2 ms. This voltage must be externally generated and is not supplied internally.

Does S25FL128P0XNFI011M support Quad SPI or Dual SPI modes?

No. The S25FL128P0XNFI011M supports only standard single-data-rate SPI (Mode 0 and Mode 3). It does not implement Quad SPI (QSPI), Dual SPI, or DDR interfaces. Its SO/SI pins operate in single-line serial mode; parallel I/O (PO[7–0]) is available only on the 16-pin SO package variant, not on this WSON version.

How is the exposed pad on the WSON package intended to be handled on the PCB?

The exposed central pad on the WSON package is thermally conductive but electrically isolated. It must not be connected to any signal or voltage net. Tying it to GND is permissible only if PCB routing guarantees 0 mV potential difference between the pad and the GND (VSS) lead - otherwise, thermal stress or leakage may occur. No solder mask opening is required beneath the pad.