AS2520P PDF File ( Datasheet )

Preliminary AS2520, 21, 20B, 21B Telephone Speech Circuit with Loudhearing and Handsfree Austria Mikro Systeme International AG Key Features u Line, speech circuit, loudhearing, handsfree and dc, dc converter on one 28 pin CMOS chip u Operating range from 13 to 100 mA (down to 5 mA with reduced performance) u Soft clipping control eliminating harsh distortion u Volume control of receive signal with squelch and automatic loop gain compensation u Line loss compensation pin selectable u Low nois