NXP 恩智浦SINGLE CHIP 300-BAUD MODEM W/DTMF TRANSCEIVER
MC145446A MC145446
AMOTOROLA 1 Product Preview ??????????? ???? ?#? ????? %?"? ??? ? ??!???$? The MC145446A is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter