MC145450

The MC145450 is a silicon-gate CMOS frequency shift keying (FSK) modem intended for use in Bell 202 and CCITT V.23 applications.

The features of MC145450 can be summarized as (1)bell 202 compatible to 1800 baud main channel; (2)0 to 150 baud reverse channel; (3)CCITT V.23 made 2 compatible to 1800 main channel; (4)CCITT V.23 to 75 baud compatible reverse channel; (5)TTL compatible; (6)eight selectable RTS-CTS delay options; (7)soft turn-off capability; (8)answer back tone generator (US and CCITT tones); (9)carrier detect input; (10)22 pin package.

The absolute maximum ratings of MC145450 are (1)DC supply voltage VDD: 10V; (2)input voltages, all inputs Vin: VSS-0.5 to VDD+0.5V; (3)DC current drain per pin IOUT Pin 15, 16, 18, 19, 20: 10mA; Pins 2, 8: 35mA; (4)operating temperature range TA: 0 to +70°C; (5)storage temperature range Tsg: - 55 to +150°C; (6)DC supply voltage VDD-VSS: 4.5/5.0/6.5V.