Infineon Technologies S25FL128LAGBHV020

Overview

S25FL128LAGBHV020 from Infineon is a 128-Mbit serial NOR flash memory with Quad SPI interface, 3.0–3.6 V supply, 100 MHz clock frequency, and 133 MHz equivalent read speed in DDR mode. It supports XIP (execute-in-place), sector erase, and deep power-down for low-power embedded boot code storage in industrial controllers.

For engineers reviewing the S25FL128LAGBHV020 datasheet, S25FL128LAGBHV020 pinout, S25FL128LAGBHV020 application, or S25FL128LAGBHV020 equivalent, key selection criteria include Quad SPI timing compliance, 1.8 V I/O voltage support, sector protection granularity, and JEDEC JESD216 Rev C SFDP compatibility.

Technical Context

This device implements a standard SPI-compatible command set extended for Quad I/O operation, supporting single/dual/quad I/O read and program modes. It features a 256-byte page size, uniform 4-KB sectors, and a 64-KB block architecture aligned with JEDEC standards.

The memory includes hardware write protection via WP# pin and software-controlled sector lockdown using volatile/non-volatile status registers. Its SFDP table provides configurable read latency, dummy cycles, and address width parameters for automatic initialization by host boot ROMs.

Key Specifications

Pinout & Package

8-pin SOIC (208 mil) package with standard SPI pinout and dedicated Write Protect (WP#) and Hold (HOLD#) control terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q128JVSIM and S25FL128SAGMFI001, the S25FL128LAGBHV020 uniquely combines 3.3 V compatibility, DDR read mode, and one-time programmable secure sector-making it optimal for industrial and automotive systems demanding mixed-voltage operation, fast boot, and hardware root-of-trust.

Availability

S25FL128LAGBHV020 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging devices, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S25FL128LAGBHV020 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 secure microcontrollers.

This part belongs to the Semper™ family of high-reliability NOR flash memories, designed specifically for mission-critical embedded boot and code storage where data integrity, long-term retention, and functional safety compliance are mandatory.

FAQ

What is the maximum clock frequency supported in Quad SPI mode?

The S25FL128LAGBHV020 supports up to 100 MHz in standard Quad SPI mode and 66.5 MHz in DDR Quad SPI mode, delivering 532 MB/s effective read bandwidth. This timing is validated across the full industrial temperature range (-40°C to +105°C) and requires proper PCB layout with matched trace lengths and controlled impedance.

Does this device support hardware write protection for specific sectors?

Yes, it provides hardware write protection via the WP# pin, which locks the top and bottom 4 KB sectors when asserted low. Combined with software-controlled sector lockdown using volatile and non-volatile status registers, this enables layered protection against accidental or malicious firmware corruption.

Is the secure silicon sector truly one-time programmable?

Yes, the 512-byte secure silicon sector is factory-fused and permanently locked after first programming. Once written, its contents cannot be erased or rewritten-even with high-voltage programming pulses-ensuring cryptographic keys or calibration data remain tamper-proof throughout the device's lifetime.

How does SFDP Rev C improve system integration versus earlier revisions?

JESD216 Rev C adds mandatory support for 4-byte addressing, configurable dummy cycles per read command, and enhanced parameter table versioning. This allows host boot ROMs to automatically adapt to device-specific timing without hard-coded register writes, simplifying firmware portability across flash generations.