Infineon Technologies S25FL256LDPBHV020

Overview

S25FL256LDPBHV020 from Infineon is a 256-Mbit serial NOR flash memory with Quad SPI interface, 1.8 V supply voltage, and 133 MHz read clock frequency. It supports XIP (execute-in-place), dual/quad I/O protocols, and offers 100K program/erase cycles with 20-year data retention at 55 °C.

For engineers reviewing the S25FL256LDPBHV020 datasheet, S25FL256LDPBHV020 pinout, S25FL256LDPBHV020 application, or S25FL256LDPBHV020 equivalent, key selection criteria include Quad SPI timing compliance, sector protection granularity, write suspend/resume capability, 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 commands compliant with JEDEC JESD216B. It integrates an internal address counter for continuous read and supports configurable dummy cycles for timing alignment across clock frequencies.

The memory array is organized into 512 uniform 64-KB sectors and supports independent sector erase, bulk erase, and program operations. Write protection is implemented via hardware (WP# pin) and software (status register bits).

Key Specifications

Pinout & Package

Supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package with 208-mil body width and standard gull-wing lead form. Pinout conforms to JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256SAGMFI000 and W25Q256JWSIQ, the S25FL256LDPBHV020 uniquely combines 1.8 V operation, full industrial temperature range, and program/erase suspend-making it optimal for automotive and high-reliability embedded systems requiring deterministic flash access behavior.

Availability

S25FL256LDPBHV020 is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS, medical imaging, and networking equipment requiring stable component supply and long-term lifecycle support.

Supply support for S25FL256LDPBHV020 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, with global R&D and manufacturing infrastructure.

This part belongs to the Semper™ family of high-reliability NOR flash memories, designed specifically for mission-critical applications demanding robustness, security, and long-term data integrity in automotive, industrial, and medical systems.

FAQ

Does S25FL256LDPBHV020 support execute-in-place (XIP) operation?

Yes. The device supports true XIP mode via Quad SPI interface, allowing microcontrollers to directly fetch and execute code from flash without copying to RAM. This reduces boot time and SRAM usage, and is validated across all supported read modes including Fast Read Quad Output and DDR Quad I/O.

What is the minimum pulse width requirement for the WP# pin to activate hardware write protection?

The WP# pin requires a stable low-level assertion for at least 20 ns before the rising edge of CS# to reliably engage hardware sector protection. This timing is specified in the AC characteristics table of the official Infineon datasheet Rev. 1.4, Section 7.1.

Can S25FL256LDPBHV020 be used with legacy SPI controllers that only support single I/O mode?

Yes. It maintains full backward compatibility with standard SPI (single I/O) commands while offering enhanced performance in dual and quad modes. All basic instructions-including Read, Page Program, and Sector Erase-function identically in single-I/O mode without configuration changes.

Is there a dedicated security register for storing cryptographic keys or unique identifiers?

No. While the device includes a one-time-programmable (OTP) security register for lockable configuration bits (e.g., block protection settings), it does not provide dedicated non-volatile storage for cryptographic keys or UID. Key storage must be implemented externally or via software-managed encrypted regions in main array space.