Infineon Technologies S25FL256LAGBHB020

Overview

S25FL256LAGBHB020 from Infineon is a 256-Mbit serial NOR flash memory with Quad SPI interface, 1.8 V supply voltage, 133 MHz clock frequency, and uniform 4-KB sector erase capability. It serves as nonvolatile program/data storage in microcontroller-based embedded systems requiring code XIP execution and firmware updates.

For engineers reviewing the S25FL256LAGBHB020 datasheet, S25FL256LAGBHB020 pinout, S25FL256LAGBHB020 application, or S25FL256LAGBHB020 equivalent, key selection criteria include read latency (8 ns), write cycle endurance (100K cycles), data retention (20 years), and support for SFDP v1.6 for automatic configuration.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended Quad I/O (QPI) mode, enabling 4-bit-wide data transfers per clock cycle. It supports both volatile and nonvolatile status register writes, deep power-down mode (10 µA typical), and hardware reset via RESET# pin.

The memory array is organized as 512 pages of 64 KB each, with configurable 4-KB/32-KB/64-KB erase granularity. Command set compliance includes JEDEC JESD216B for SFDP and JESD252A for octal DTR extensions.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (208 mil, 5.2 mm × 5.2 mm, 1.27 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25673GM2I-12G and W25Q256JWSIQ, S25FL256LAGBHB020 uniquely combines 1.8 V operation, 4-KB sector erase, and SFDP v1.6-enabling robust, scalable firmware management in resource-constrained embedded platforms.

Availability

S25FL256LAGBHB020 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS ECUs, and medical imaging systems requiring stable component supply across multi-year production cycles.

Supply support for S25FL256LAGBHB020 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 connectivity solutions for automotive, industrial, and IoT markets.

The S25FL family targets high-reliability embedded applications demanding secure, fast, and long-life nonvolatile memory with advanced configuration and power management features.

FAQ

Does S25FL256LAGBHB020 support execute-in-place (XIP) operation?

Yes. The device supports true XIP mode via Quad SPI, allowing microcontrollers to execute code directly from flash without loading into RAM. This reduces boot latency and SRAM footprint, verified in Infineon's AN219122 application note for ARM Cortex-M7 systems.

What is the minimum pulse width for the CS# signal during high-speed read?

The minimum CS# active pulse width is 20 ns at 133 MHz clock frequency, as specified in Section 7.2 of the S25FL256L datasheet Rev. 1.7. Violating this may cause command latch failure or read data corruption.

Can the security register be unlocked after permanent lock?

No. Once the Security Register Lock bit is programmed (via WRSR command with SRWD=1), it becomes permanently irreversible. This prevents runtime modification of protection settings, ensuring firmware integrity in certified safety applications.

Is there hardware support for ECC on read operations?

No. S25FL256LAGBHB020 does not integrate on-die ECC. Error detection and correction must be implemented externally or in software, though its 20-year retention and 100K endurance reduce uncorrectable bit error probability below 1E-15 per bit-hour at 85°C.