This part is a kind of semiconductor called AN6123.

Function of this product has Speech network IC with ALC.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

ICs for Telephone AN6123MS Speech network IC with ALC s Overview The AN6123MS is an ALC IC for level control of audio signal (300 Hz to 3 kHz). Adopting a mini 5-pin package, mounting on a small area is possible. s Features • Wide supply voltage operation range of VCC = 2.4 V to 6.0 V • Small current consumption of ICC = 500 µA • Reduction of a bad effect by the external noise thanks to a package for a rear side mounting. s Applications • Cordless telephone, PDC, PHS telephone s Block Diagram 1.9 ± 0.1 0.95 0.95 12 0.65 ± 0.15 Unit: mm 0.1 to 0.3 0.2 0.3 0.25 0.05 + − + − 2.8 1.5 0.4 ± 0.2 5 43 0.3 + − 0.1 0.05 1.45 ± 0.1 2.9 + − 0.2 0.05 0.65 ± 0.15 0.16 + − 0.10 0.06 0.2 0.1 + − 1.1 0.8 0 to 0.1 MINI-5D 3 Input 4 GND 5 Output DET g [ ... ]

AN6123 PDF Datasheet Download