Panasonic Integrated Circuit Appraisal

Panasonic AN22117A Integrated Circuit

This is a Panasonic AN22117A surface-mount integrated circuit (IC) soldered onto a multi-layer green printed circuit board (PCB). The chip is housed in a square, black plastic Low-profile Quad Flat Package (LQFP) with high pin-density Gull-wing leads on all four sides. The laser-etched markings on the top surface include the manufacturer name 'Panasonic', the primary part number 'AN22117A', and a secondary production/lot code '721P2256'. A small circular indentation (pin 1 marker) is visible in the bottom-left corner of the chip's body. The surrounding circuitry features various surface-mount devices (SMD), including ceramic capacitors and resistors (notably labeled R105, R106, P104, and C111-C115). The soldering is clean and reflective, indicating modern automated manufacturing techniques. The board appears to be in good functional condition with no visible signs of thermal stress, corrosion, or physical fractures. The presence of 'STM OUT' labeling suggests this IC may be part of a signal processing or control subsystem in a consumer electronic device, likely manufactured in the early-to-mid 2000s based on the component style and marking format.