AS2540 Datasheet (austriamicrosystems AG) - Remote Controlled Single-Chip-Telephone

AS2540, Remote Controlled Single-Chip-Telephone

The AS2540 is a CMOS integrated circuit that incorporates a speech circuit (line-adaptation, 2/4-wire conversion, separate Rx- and Tx-amplifiers for handset and modem), MF dialler, ring frequency detector, ring melody generator and a two wire serial interface.

It shall act as an a/b-line-powered dev

AS2540 Features

* - Line Interface, Speech Circuit, MF Dialler and Tone Ringer on a 28 pin CMOS chip - Programmable via 2-wire serial interface (UART 9600 baud, 8N1) - Watch dog timer for Backup Mode - Additional input for modem transmit path - Additional output for modem receive path - CMOS for high EMC immunity - L