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austriamicrosystems
Telephone Line Interface and Speakerphone Circuit
AS2522B
Key Features
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DATA SHEET
General Description
AS2522 is a CMOS integrated circuit that incorporates DC and AC line adaptation (DC-mask and synthesized ACimpedance of 100 0Ω ) as well as a speech circuit with softclipping, line loss compensation and Rx-volume control for handset and handsfree operation. It shall act as an a/bline powered device, which is controlled by a CPU via a serial interface. Furthermore the AS2522 incorporates a DTMF, FSK transmitter, single tone and ringer tone generator. AS2522 allows to use an off-the-shelf microprocessor without special blocks and functions for telephone applications.
AS2522B Datasheet
