DTMF TRX 3.58MHz CMOS 2.5V/3.3V/5V 18-Pin PDIP
DTMF TRX 3.58MHz CMOS 2.5V/3.3V/5V 20-Pin PDIP
Telephone Circuit, CMOS, PDIP18
Telephone Dialer Circuit, CMOS, PDIP18, PLASTIC, DIP-18
