XR-14412 Datasheet | Exar

DESCRIPTION The XR-14412 contains all the necessary circuitry to construct a plete FSK modulator/demodulator (MODEM) system. Included is circuitry for pinprogrammable frequency bands, either U.S. or foreign (CCITI) standards for low-speed MODEMS. The XR-14412 provides T2L-patible inputs and outputs. Included in the XR-14412 are features for self-testing and an echo suppression tone generator. The XR-14412 utilizes plementary MOS technology for low-power operation. FUNCTIONAL BLOCK DIAGRAM Voo TTLD TYPE ECHO FEATURES Simplex, Half-Duplex, and Full-Duplex Operation Crystal Controlled Answer or Originate Modes Single Supply Operation Self-test Mode Selectable Data Rates-300, or 600 bps T2L- or CMOS-patible Inputs and Outputs Echo Suppressor Disable Tone Generator U.S. or Foreign (CCITT) patible ORDERING INFORMATION Tx EN Tx DATA MODE TXCAR APPLICATIONS Stand-Alone MODEMS Remote Terminals Acoustical Couplers Built-in MODEMS Part...