Infineon Technologies S25FL128LAGNFI011

Overview

S25FL128LAGNFI011 from Infineon is a 128-Mbit serial NOR flash memory with Quad SPI interface, 3.0 V supply voltage, 100 MHz clock frequency, and uniform 256-byte sector erase capability. It serves as non-volatile program/data storage in microcontroller-based embedded systems requiring fast read access and reliable code execution.

For engineers reviewing the S25FL128LAGNFI011 datasheet, S25FL128LAGNFI011 pinout, S25FL128LAGNFI011 application, or S25FL128LAGNFI011 equivalent, key selection criteria include Quad SPI timing compliance, sector protection granularity, write endurance (100K cycles), data retention (20 years), and industrial temperature range (-40°C to +85°C) support.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with enhanced Quad I/O mode supporting single/dual/quad read commands. It uses a 4-byte address space with configurable dummy cycles and supports both volatile and non-volatile status register writes.

Internal architecture includes a 128 Mbit (16 MB) array organized as 32,768 sectors of 256 bytes each, with hardware block protection enabled via WP# and BP bits. The device supports reset and deep power-down modes for low standby current (10 µA typical).

Key Specifications

Pinout & Package

Package: 8-pin SOIC (208 mil, GNFI suffix), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128SAGNFI010, this part trades higher-speed Quad SPI and SFDP support for cost-sensitive industrial deployments; versus MX25L12833FZNI-10G, it delivers 4× faster read throughput and finer erase control essential for secure firmware updates.

Availability

S25FL128LAGNFI011 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for S25FL128LAGNFI011 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 ICs, and memory solutions for industrial and mission-critical applications.

This device belongs to the S25FL family of high-reliability serial NOR flash memories designed specifically for code storage and execution in safety-aware embedded systems with stringent data integrity requirements.

FAQ

Is S25FL128LAGNFI011 compatible with standard SPI controllers?

Yes, it supports standard SPI mode (single I/O) as well as dual and quad I/O modes. In standard SPI, only SI and SO pins are used for data; CLK, CS#, and VCC/VSS remain identical. Command sets are backward-compatible, allowing integration into legacy designs without hardware changes.

What is the minimum erase block size supported?

The device supports uniform 256-byte sector erase as the smallest erasable unit. There are no smaller erase granularities such as 4-KB or 64-KB blocks. This enables precise firmware patching and eliminates the need for wear-leveling software in many applications.

Does this part support execute-in-place (XIP) operation?

Yes, S25FL128LAGNFI011 supports XIP mode via Quad SPI read commands. Its fast random access time (≤8 ns) and continuous read capability allow microcontrollers with QSPI peripherals to execute code directly from flash without copying to RAM, reducing memory footprint and boot latency.

How is hardware write protection configured?

Hardware write protection is controlled through the WP# pin and two non-volatile status register bits (BP0, BP1). When WP# is driven low, sectors corresponding to set BP bits are locked against program/erase. Protection can be applied to top/bottom 64 KB, 128 KB, or full array, and remains active after power cycle.