MC145444
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document by MC145444/D
Advance Information Single-Chip 300-Baud Modem
MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter systems or remote control systems over the telephone network. This device is patible with CCITT V.21 and contains the entire circuit that provides a full- duplex or half- duplex 300- baud data munication over a pair of telephone lines. This device also includes the DTMF generator and call progress tone detector (CPTD). The differential line driver has the capability of driving 0 d Bm into a 600 Ω load with a single + 5 V power supply. The transmit level is controlled by the programmable attenuator in 1 d B steps. Devices functions are controlled through a 3- wire serial interface.
- -
- -
- -
- -
- Capable of Driving 0 d Bm into a 600 Ω Load DTMF Generator On- Chip Imprecise Call Progress Detector On- Chip A Transmit Attenuator Programmable in 1 d B Steps 3- Wire...
