Details, datasheet, quote on part number: TS7514CFN
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Features, Applications

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

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. ORDER CODES

DESCRIPTION The is an FSK modem which can be programmed for asynchronous half-duplex voiceband communications 2-wireline or full duplex PIN CONNECTIONS

Name MOD/DMTF Pin Number PLCC28 1 MODEM or DMTF Operating Mode Selection. Also controls write operations to control registers (if MOD/DMTF = 0 and MC/BC = 0). Digital Control Input. In MODEM mode, it sets transmission mode to main or back channel. It also permits selection of dialing or control registers programming. Request to Send. When RTS = 0, the circuit sends an analog signal to the ATO output. The signal depends on the operating mode selected. When RTS = 1, the signal sent to ATO is suppressed after its first zero crossing. When MOD/DMTF = 0 and MC/BC = 0, the RTS pin acts as a clock for serial data loading into the input register. Serial Register Write Select Input. When ENP = 0, the serial register input is connected to TxD. When ENP = 1, the register input is connected to PRD. Digital Ground = 0V. All digital signals are referenced to this pin. Digital Input for Transmit or Control Data Digital Input for Control Data. Selected through ENP Crystal Oscillator Input. Can be tied to an external clock generator. fQUARTZ = 3.579MHz. Crystal Oscillator Output Data Carrier Detect Output Digital Receive Data Output Zero Crossing Rx Digital Output (ringing detection) Analog Output for the Receive Signal after Filtering or Analog Input for the Amplifier-limiter. Analog Receive Filter Output A2 Amplifier Output A2 Amplifier Inverting Input A1 Amplifier Inverting Input A1 Amplifier Output Negative Supply Voltage 5% Analog Ground 0 V. Reference Pin for Analog Signals Positive Supply Voltage 5% Analog Transmit Output Analog Output for Line Monitoring and Buzzer Direct Analog Input Transmit Filter



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