DTMF TRX 3.58MHz CMOS 2.5V/3.3V/5V 18-Pin PDIP
Commercial Temperature 20-Pin DIP Telecom IC
Telephone Dialer Circuit, CMOS, PDIP20, PLASTIC, DIP-20
DTMF TRX/Pulse TRX 3.58MHz CMOS 2.5V/3.3V/5V 20-Pin PDIP
