256 Mbit NOR Flash in a 24-BGA — what this part is
The Infineon S25FL256LDPBHI030 is a 256 Mbit serial NOR Flash memory from the FL-L family, organized as 32M x 8 bits. It communicates over a SPI bus with Quad I/O and QPI support at a clock frequency of 66 MHz, giving a practical read throughput that suits code-shadowing and data-logging in embedded systems. It comes in a 24-ball TBGA package measuring 6x8 mm — a fine-pitch BGA that demands careful PCB layout and X-ray inspection during assembly.
Infineon has ended production, so the only available stock is what remains in the supply chain — franchised excess, independent-distributor inventory, or broker channels. If you need a drop-in replacement, you will need to evaluate pin-compatible alternatives within the FL-L family or migrate to a newer Infineon serial NOR Flash series (such as the SEMPER or FS-S families), which may require a firmware and layout change. For this specific code, procurement goes through a quote-to-order process: we source against your RFQ and confirm availability and pricing at the time of request.
66 MHz Quad SPI — what the clock rate means for your bus
The 66 MHz clock is the maximum SPI clock frequency for both Single and Quad I/O reads. In Quad I/O mode, that translates to roughly 33 MB/s sustained throughput — enough to keep a Cortex-M or entry-level application processor fed for execute-in-place (XIP) or fast firmware updates. The QPI mode reduces the command overhead by using a 4-bit serial protocol for opcodes and addresses, which helps when the controller supports it. If your MCU's QSPI peripheral tops out at 80 MHz or 104 MHz, this part will run at its own 66 MHz ceiling; the interface is backward-compatible with standard SPI at lower speeds.