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