Infineon Technologies S25FL128LAGBHI033

Overview

S25FL128LAGBHI033 from Infineon is a 128-Mbit serial NOR flash memory with Quad SPI interface, 3.0–3.6 V supply voltage, and 105 MHz clock frequency. It supports XIP (execute-in-place), sector erase (4 KB/32 KB/64 KB), and deep power-down mode (10 µA typical). Used in industrial PLC firmware storage and embedded boot code retention.

For engineers reviewing the S25FL128LAGBHI033 datasheet, S25FL128LAGBHI033 pinout, S25FL128LAGBHI033 application, or S25FL128LAGBHI033 equivalent, key selection criteria include Quad SPI timing compliance, sector protection granularity, endurance (100K program/erase cycles), and industrial temperature range (−40°C to +105°C) support.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended Quad I/O (QPI) mode for higher throughput. It uses a 64-Mbit × 2 die architecture with uniform 4-KB sectors and configurable block protection via status register bits.

Command set complies with JEDEC JESD216B for SFDP (Serial Flash Discoverable Parameters), enabling automatic configuration by host boot ROM. Write protection includes hardware WP# pin control and software-based sector lockdown.

Key Specifications

Pinout & Package

8-pin SOIC (Small Outline Integrated Circuit) package, 208-mil width, RoHS-compliant, surface-mountable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128SAGMFI001, this part trades peak speed for lower active power and deeper sleep; versus MX25L12833FZCII00, it delivers 3× higher effective bandwidth and integrated hardware write protection not present in the Macronix variant.

Availability

S25FL128LAGBHI033 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS ECUs, and medical imaging systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S25FL128LAGBHI033 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, sensing, and security solutions for industrial, automotive, and IoT applications.

This device belongs to the S25FL family of high-performance serial NOR flash memories designed specifically for reliable boot code storage and firmware updates in harsh-environment embedded systems.

FAQ

Does S25FL128LAGBHI033 support XIP (execute-in-place) operation?

Yes, it supports true XIP mode via Quad SPI interface, allowing the host processor to directly fetch instructions from flash without copying to RAM. This reduces boot time and SRAM usage in resource-constrained microcontrollers. The device includes dedicated address latching and prefetch buffers optimized for sequential instruction fetch.

What is the minimum pulse width requirement for the CS# signal during command execution?

The CS# signal must remain low for ≥50 ns before CLK rising edge and held low for ≥50 ns after final data bit sampling. Violating these timing margins may cause command decode failure or partial writes. These values are specified in the AC Characteristics table of the official Infineon datasheet Rev. 1.7.

Can the WP# pin be left unconnected if software write protection is used exclusively?

No, WP# must be actively driven high or low - floating is not permitted. If hardware protection is disabled, WP# must be pulled high via ≥10 kΩ resistor to VCC. Leaving it floating risks spurious write protection activation due to noise coupling, especially in industrial EMI environments.

How does the deep power-down mode affect the device's ability to respond to external wake-up signals?

Deep power-down mode disables all internal circuitry except the wake-up detection logic on CS#. The device exits DPD only upon CS# falling edge, requiring ≥100 µs recovery time before accepting commands. No other pins (including CLK or WP#) can initiate wake-up; host must manage timing accordingly in low-power system states.