Infineon Technologies S25FL256LDPBHN020

Overview

S25FL256LDPBHN020 from Cypress Semiconductor is a 256 Mbit (32 Mbyte) serial NOR flash memory with SPI Multi-I/O interface, supporting SDR/DDR Quad I/O and QPI modes up to 133 MHz clock rate, 66 MB/s read bandwidth, 4 KB uniform sector erase, and industrial temperature range (–40°C to +85°C). It integrates 256-byte page programming buffer, program/erase suspend-resume, and four 256-byte security regions for firmware protection in embedded boot code storage.

For engineers reviewing the S25FL256LDPBHN020 datasheet, S25FL256LDPBHN020 pinout, S25FL256LDPBHN020 application, or S25FL256LDPBHN020 equivalent, key selection criteria include quad-mode timing compliance, SFDP v1.5 parameter discovery support, security region lock granularity, 2.7–3.6 V single-supply operation, and WSON-8 package compatibility with board-level reflow profiles.

Technical Context

This device implements a floating-gate 65 nm process architecture with dual-bank memory array control logic enabling concurrent read-while-write operations. Its command set supports JEDEC JESD216B-compliant Serial Flash Discoverable Parameters (SFDP), allowing host systems to auto-configure read latency, dummy cycles, and address width without hard-coded initialization.

The SPI-MIO interface supports mode 0/3 clock polarity-phase, configurable between Single/Dual/Quad I/O and QPI protocols via Configuration Registers CR1V and CR2V. Reset behavior is controlled by CR2V[7], and IO3/RESET# pin function dynamically switches based on QUAD and QPI bit settings - not fixed hardware assignment.

Key Specifications

Pinout & Package

Package: 8-pin WSON (6 mm × 8 mm, 0.5 mm pitch, Pb-free, moisture sensitivity level 3), marked as WNH008 per Cypress ordering nomenclature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256SAGMFI000 and MX25L25645GMI-10G, the S25FL256LDPBHN020 delivers higher bandwidth via DDR Quad I/O, longer data retention, integrated security regions, and standardized SFDP auto-configuration - making it optimal for space-constrained, security-critical embedded systems requiring future-proof firmware update paths.

Availability

S25FL256LDPBHN020 is available at Aetrix Electronics and suitable for industrial HMI firmware storage, automotive ADAS calibration data logging, and medical imaging system configuration management requiring stable component supply across multi-year production cycles.

Supply support for S25FL256LDPBHN020 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance, low-power memory and microcontroller solutions for industrial, automotive, and IoT applications.

The FL-L family targets embedded systems needing high-speed, secure, and reliable serial NOR flash for XIP boot code, firmware updates, and parameter storage - optimized for minimal PCB footprint and simplified host interface design.

FAQ

What is the maximum clock frequency supported in DDR Quad I/O mode?

The S25FL256LDPBHN020 supports DDR Quad I/O at up to 66 MHz clock frequency, delivering 132 MT/s effective data rate and 66 MB/s sustained read bandwidth. This is confirmed in the Performance Summary section (Page 2) of the official datasheet, with AC timing parameters specified in Section 5.5.

Does this device support JEDEC-standard Serial Flash Discoverable Parameters (SFDP)?

Yes, the S25FL256LDPBHN020 fully complies with JEDEC JESD216B SFDP v1.5. It exposes a standardized parameter table at address 0x00000000, enabling automatic host detection of read latency, dummy cycles, and address width - eliminating hardcoded initialization sequences.

How many independent security regions does this part provide, and what is their size?

This device provides four independent security regions, each exactly 256 bytes in size, located outside the main flash array. They are accessible via dedicated commands (e.g., RDSCUR, WRSCUR) and support volatile lock, password protection, or permanent lockdown - as detailed in Sections 7.5 and 8.1 of the datasheet.

What package type and dimensions does S25FL256LDPBHN020 use?

S25FL256LDPBHN020 uses an 8-pin WSON package (6 mm × 8 mm, 0.5 mm pitch), designated WNH008 in Cypress documentation. It features an exposed thermal pad on the bottom and complies with IPC/JEDEC J-STD-020D moisture sensitivity level 3 handling requirements.