Parts · ICs
HD14066B
CMOS Quad Bilateral Switch DIP-14 / SOIC-14.1 circuit uses this part.
Datasheet · from ti.com
Substitutes same socket
Parts that fit the same socket: the same function, pin count and pinout. The figures are read off each part's datasheet (this one's from page 4), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | Supply | Boards |
|---|---|---|
| CD4066 | 3–18 V | 30 |
Quad analog switch with about 125 Ω on-resistance at 15 V, lower and flatter than the CD4016 in the same pinout.
Fits the same socket
| Part | Supply | Boards | Differs |
|---|---|---|---|
| CD4016 | 3–18 V | 24 | Quad analog switch with about 200 Ω on-resistance at 15 V; the CD4066 fits the same socket with lower resistance. |