AN17820B
Panasonic
AN17820B Silicon Monolithic Bipolar IC by Panasonic (SIL-12 Pin Plastic): datasheet PDF, pinout and specifications.
Integrated Circuit - IC's SIL-12 Pin Plastic
Panasonic is a Japanese electronics group headquartered in Osaka. Its industrial devices business makes capacitors, resistors, relays, sensors, connectors and batteries; its semiconductor business is now part of Nuvoton.

AN17820B Silicon Monolithic Bipolar IC by Panasonic (SIL-12 Pin Plastic): datasheet PDF, pinout and specifications.