Infineon Technologies S25FL256LAGBHN020

Overview

S25FL256LAGBHN020 from Cypress Semiconductor is a 256 Mbit (32 MB) 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 100,000 program-erase cycles. It operates from 2.7 V to 3.6 V across –40°C to +105°C and is used in boot code storage for industrial microcontrollers and firmware update storage in network edge devices.

For engineers reviewing the S25FL256LAGBHN020 datasheet, S25FL256LAGBHN020 pinout, S25FL256LAGBHN020 application, or S25FL256LAGBHN020 equivalent, key selection criteria include quad-mode timing compliance, SFDP register support for configuration auto-detection, security region protection granularity, and industrial temperature qualification for embedded control systems.

Technical Context

The S25FL256LAGBHN020 implements a 65 nm floating gate architecture with a 256-byte page programming buffer and hierarchical erase structure (4 KB sector / 32 KB half-block / 64 KB block / chip). Its command set supports legacy SPI compatibility while enabling high-throughput XIP and code shadowing via burst wrap and continuous read modes.

Hardware-level security includes four 256-byte non-volatile security regions outside the main array, power supply lock-down, password protection, and individual sector/block lock with volatile/non-volatile configuration options. The device uses dual-role pins (IO2/WP#, IO3/RESET#) dynamically reconfigured via configuration registers CR1V[1] and CR2V[3].

Key Specifications

Pinout & Package

Package: 8-pin WSON (6 mm × 8 mm, WNH008 footprint), RoHS-compliant, moisture sensitivity level 3.

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 S25FL256LAGBHN020 uniquely delivers DDR Quad I/O throughput and hardware-enforced password-protected security regions - critical for secure boot and real-time firmware update in safety-rated systems.

Availability

S25FL256LAGBHN020 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot loader deployment, and medical imaging device update storage requiring stable component supply across extended product lifecycles.

Supply support for S25FL256LAGBHN020 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-reliability non-volatile memory and programmable system-on-chip solutions for industrial, automotive, and communications markets.

The FL-L family targets high-performance embedded systems needing scalable serial flash with enhanced security, DDR bandwidth, and industrial temperature resilience - specifically engineered for code execution and firmware update in resource-constrained edge devices.

FAQ

What is the default configuration of the S25FL256LAGBHN020 after power-on reset?

Upon power-on reset, the device defaults to standard SPI mode (CR1V[1] = 0, CR2V[3] = 0), with 24-bit addressing, status register protection disabled (SRP1/SRP0 = 00), and all security regions unlocked. The SFDP register is accessible at address 0x00000000, and the first 4 KB sector contains factory-default erased data (0xFF).

Does the S25FL256LAGBHN020 support execute-in-place (XIP) operation?

Yes - it supports continuous read mode with burst wrap addressing, enabling direct code execution from flash without copying to RAM. XIP is enabled using the Fast Read Continuous (0x0B) or Quad I/O Continuous (0xEB) commands, with timing defined in the SFDP table for host controller auto-configuration.

How is hardware write protection implemented on the S25FL256LAGBHN020?

Hardware write protection is controlled by the WP# pin in conjunction with Status Register bits SR1NV[7] and Configuration Register CR1V[1]. When SR1NV[7] = 1 and CR1V[1] = 0, WP# asserts low-level protection on all sectors unless overridden by volatile lock bits. Protection remains active even during power cycling if non-volatile lock bits are set.

Can the S25FL256LAGBHN020 be used in a 1.8 V system?

No - the S25FL256LAGBHN020 is specified only for 2.7 V to 3.6 V operation. It lacks 1.8 V I/O compatibility or dual-voltage support. For 1.8 V systems, consider Cypress's FL-S family (e.g., S25FL128S) or Infineon's successor parts explicitly rated for 1.65–2.0 V operation.