Infineon Technologies S25FL128P0XNFI001M

Overview

S25FL128P0XNFI001M from Cypress Semiconductor is a 128-Mbit, 3.0 V serial NOR Flash memory with uniform 64 KB sector architecture, 104 MHz SPI interface, 256-byte page programming (1.5 ms typical), and industrial temperature range (–40°C to +85°C) in an 8-pin WSON (6 × 8 mm) package. It supports standard and fast read commands, sector/bulk erase, deep power-down mode (3 µA typical), and hardware/software memory protection via WP#/ACC and status register BP bits.

For engineers reviewing the S25FL128P0XNFI001M datasheet, S25FL128P0XNFI001M pinout, S25FL128P0XNFI001M application, or S25FL128P0XNFI001M equivalent, key selection considerations include 64 KB uniform sector granularity, 2.7–3.6 V single-supply operation, SPI Mode 0/3 compatibility, accelerated programming support via WP#/ACC voltage boost, and factory-confirmed migration path to S25FL128S.

Technical Context

The S25FL128P0XNFI001M implements a serial peripheral interface (SPI) with CPOL=0/CPHA=0 (Mode 0) and CPOL=1/CPHA=1 (Mode 3) support, latching input on SCK rising edge and outputting data on falling edge. It uses Cypress's 0.09 µm MirrorBit® process and features dual erase architectures: 64 KB sectors (0.5 s typical erase time) and bulk array erase (128 s typical).

Memory protection combines hardware (WP#/ACC pin low + SRWD bit set) and software (BP3–BP0 status register bits) mechanisms to lock configurable memory regions. The device enters Deep Power Down (B9h command) to reduce current to 3 µA typical while retaining data, and requires RES (ABh) command to resume operation.

Key Specifications

Pinout & Package

Package: 8-pin WSON (6 × 8 mm), no-lead, 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 S25FL128P0XNFI001M, the S25FL128S offers documented lifecycle extension and DTR support for higher bandwidth, while MX25L12833F provides functional equivalence at lower cost but requires validation of protection logic and voltage margin compatibility.

Availability

S25FL128P0XNFI001M is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and smart energy meter firmware requiring stable component supply and long-term obsolescence management.

Supply support for S25FL128P0XNFI001M 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 memory, microcontrollers, and connectivity solutions for embedded systems.

The S25FL family delivers high-reliability serial NOR Flash optimized for code execution, secure firmware storage, and robust operation in industrial, automotive, and medical applications where data integrity and long-term availability are critical.

FAQ

Is S25FL128P0XNFI001M still recommended for new designs?

No. Cypress explicitly states this part is not recommended for new or current designs. The factory-recommended migration path is S25FL128S, which offers improved reliability, extended lifecycle support, and additional features like DTR mode. Designers should initiate migration planning using the S25FL128S datasheet and validate timing, protection, and command compatibility.

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

The exposed central pad on the S25FL128P0XNFI001M's WSON package is a thermal pad with no electrical connection. It must not be tied to any signal or voltage rail. If connected to GND, PCB routing must ensure 0 mV potential difference between the pad and the GND (VSS) lead to avoid latch-up or parametric shift. Its primary role is thermal dissipation, not electrical grounding.

How does Accelerated Programming mode work, and what voltage is required?

Accelerated Programming mode reduces page program time from 1.5 ms to 1.2 ms typical by applying 8.5 V to 9.5 V to the WP#/ACC pin during programming. This voltage must be externally generated and applied only during PP command execution. Standard operation uses WP#/ACC at VCC or GND for write protection; the high-voltage mode is optional and requires careful board-level voltage management.

Can S25FL128P0XNFI001M be used in SPI Mode 1 or Mode 2?

No. The device supports only SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). In both modes, data is latched on the rising edge of SCK and output on the falling edge. Modes 1 and 2 are incompatible due to mismatched clock polarity and phase timing requirements, and will result in command corruption or failed communication.