linear LM567 Tone decoder MC14046 Phase Locked Loop LF398 Sample And Hold XR2206 Monolilitic function generator L298 Dual full-bridge driver ULN200x Seven Darlington array ULN280x Eight Darlington array UDN2981 Eight Channel Source Drive UCN5801 BiMOS II Latched Drivers CA3081/CA3082 NPN Transistor Array