DESCRIPTION

The TS7514 is an FSK modem which can be programmed for asynchronous half-duplex voice bandcommunications ona 2-wireline or full duplex on a 4-wire line. Its programming concept makes it the ideal component to design low-cost intelligent modems, featuring auto dialing and auto answering. The TS7514 conforms to CCITT V.23 recommendation. The chip incorporates DTMF dialing, line monitoring, tone and dialing detection.

• PROGRAMMABLE MODES :

- Modem 75bps transmit, 1200bps receive

- Modem 1200bps transmit, 75bps receive

- DTMF dialing

- Call status tone detection

- Auxiliary analog transmit input

- Analog test loopback

. PROGRAMMABLE FUNCTIONS :

- Transmission level

- Hysteresis and detection level

- Filters (reception and transmission)

- Line monitoring and buzzer

- DTMF frequencies

• FIXED COMPROMISE LINE EQUALIZER

• AUTOMATIC BIAS ADJUSTMENT

• INTEGRATED DUPLEXER

• STANDARD LOW COST CRYSTAL (3.579MHz)

• TAX TONE REJECTION

• POWER-UP INITIALIZATION OF REGISTERS

• OPERATES FROM ±5V

• CMOS