Infineon Technologies S25FL128LAGMFI000

Overview

S25FL128LAGMFI000 from Infineon is a 128-Mbit serial NOR flash memory with Quad SPI interface, 3.0–3.6 V supply, 100 MHz clock frequency, and 133 MHz equivalent read speed in DDR mode. It serves as non-volatile program/data storage in microcontroller boot systems and FPGA configuration.

For engineers reviewing the S25FL128LAGMFI000 datasheet, S25FL128LAGMFI000 pinout, S25FL128LAGMFI000 application, or S25FL128LAGMFI000 equivalent, key selection criteria include sector erase granularity (4 KB uniform sectors), write cycle endurance (100K cycles), data retention (20 years), and industrial temperature range (–40°C to +85°C).

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended Quad I/O (QPI) and Dual I/O (DIO) modes, supporting both single- and dual-data-rate transfers. It features a 64-byte page programming buffer and configurable write protection via status register bits and hardware WP# pin.

The memory array is organized as 256 Kbytes × 64 bits, with uniform 4 KB sectors and 128 KB blocks. Erase suspend/resume and deep power-down (10 µA typical) are supported for embedded system power management.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (208 mil, 5.2 mm × 5.2 mm, 1.27 mm pitch) - surface-mount compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZC-10G, S25FL128LAGMFI000 delivers higher read bandwidth and industrial temperature support; versus S25FL128SAGMFI001, it offers cost-optimized fixed-voltage operation without security extensions.

Availability

S25FL128LAGMFI000 is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS, and medical imaging systems requiring stable component supply and long-term lifecycle assurance.

Supply support for S25FL128LAGMFI000 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and memory solutions, with global R&D and manufacturing infrastructure.

This part belongs to the S25FL family of high-performance serial NOR flash memories designed specifically for demanding boot code, firmware, and configuration storage in safety-critical and industrial-grade systems.

FAQ

What is the maximum clock frequency supported in Quad SPI mode?

The S25FL128LAGMFI000 supports up to 100 MHz in standard Quad SPI mode and 133 MHz in DDR Quad SPI mode. These frequencies are validated across the full industrial temperature range and require proper PCB layout with controlled impedance traces and matched trace lengths for all four I/O lines.

Does this device support 4-byte addressing?

No, the S25FL128LAGMFI000 uses 3-byte addressing exclusively, supporting up to 16 MB of addressable space. It does not implement the 4-byte address instruction (0xB7/0xE9) or Extended Address Register, distinguishing it from later-generation S25FL128S variants.

Can the HOLD# pin be used for general-purpose I/O?

No, HOLD# is a dedicated functional pin for suspending serial communication and cannot be repurposed as GPIO. In Quad SPI mode, it operates as IO3 for data transfer but retains its hold function when asserted low during active transfers.

Is there hardware write protection for individual sectors?

Hardware write protection applies only to the top/bottom 64 KB and 128 KB blocks via the WP# pin in conjunction with status register settings. Individual 4 KB sectors are protected exclusively through software commands (SECURE, WRDI, WRSR) and cannot be locked independently by hardware pins.