Smart card interface in a small QFN — what the supply voltage tells you
The ST8034PQR is a specialized interface IC from STMicroelectronics designed for smart card applications. Its key feature is a supply voltage that accepts either 3V or 5V, covering the two common smart card supply rails. This part sits in a 16-WFQFN exposed pad package (3x3 mm QFN), surface-mount only.
Package and rework — the QFN reality
For hand rework, the 3x3 mm body is small enough that a hot-air station at 300°C with a fine nozzle lifts it cleanly if the board isn't flooded with ground plane.
There is no NRND or EOL flag in the record, so it remains a valid choice for production BOMs.