CD4066B Quad Bilateral Analog Switch
Four independent bidirectional analog switches. Each switch passes analog or digital signals in both directions when the control input is HIGH. 3–18V supply, Ron typically 80Ω.
Aliase:HEF4066B, MC14066B, Quad Analog Switch, CMOS Transmission Gate
DIP-14 Top View
14 Pins
Pinout Table14
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | 1A | Analog | Switch 1 — I/O Terminal A (bidirectional) |
| 2 | 1B | Analog | Switch 1 — I/O Terminal B (bidirectional) |
| 3 | 2A | Analog | Switch 2 — I/O Terminal A (bidirectional) |
| 4 | 2CTRL | Digital | Switch 2 Control (HIGH = closed) |
| 5 | 3CTRL | Digital | Switch 3 Control (HIGH = closed) |
| 6 | 3A | Analog | Switch 3 — I/O Terminal A (bidirectional) |
| 7 | VSS | Ground | System Ground (0V) |
| 8 | 3B | Analog | Switch 3 — I/O Terminal B (bidirectional) |
| 9 | 4A | Analog | Switch 4 — I/O Terminal A (bidirectional) |
| 10 | 4B | Analog | Switch 4 — I/O Terminal B (bidirectional) |
| 11 | 4CTRL | Digital | Switch 4 Control (HIGH = closed) |
| 12 | 1CTRL | Digital | Switch 1 Control (HIGH = closed) |
| 13 | 2B | Analog | Switch 2 — I/O Terminal B (bidirectional) |
| 14 | VDD | Power | Positive Power Supply (3–18V) |