MC14066BDR2G from onsemi, in a SOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	IN1	bidirectional	Switch 1 analog/digital I/O terminal (bilateral). Paired with OUT1 (pin 2) through the switch element. Signal range VSS <= Vin <= VDD; recommended peak-to-peak swing up to VDD.
2	OUT1	bidirectional	Switch 1 analog/digital I/O terminal (bilateral). Paired with IN1 (pin 1) through the switch element. Signal range VSS <= Vout <= VDD.
3	OUT2	bidirectional	Switch 2 analog/digital I/O terminal (bilateral). Paired with IN2 (pin 4) through the switch element. Signal range VSS <= Vout <= VDD.
4	IN2	bidirectional	Switch 2 analog/digital I/O terminal (bilateral). Paired with OUT2 (pin 3) through the switch element. Signal range VSS <= Vin <= VDD.
5	CONTROL2	input	Digital control input for switch 2. Logic 0 (VSS) opens the switch (OFF); logic 1 (VDD) closes the switch (ON). Triple-diode protected input with typical input capacitance 5 pF and leakage <= +/-0.1 uA.
6	CONTROL3	input	Digital control input for switch 3. Logic 0 (VSS) opens the switch (OFF); logic 1 (VDD) closes the switch (ON). Triple-diode protected input.
7	VSS	power_in	Negative supply / ground reference. Sets the lower bound of the signal and logic voltage ranges. Typically tied to 0 V for single-supply operation or to a negative rail for split-supply analog switching.
8	IN3	bidirectional	Switch 3 analog/digital I/O terminal (bilateral). Paired with OUT3 (pin 9) through the switch element. Signal range VSS <= Vin <= VDD.
9	OUT3	bidirectional	Switch 3 analog/digital I/O terminal (bilateral). Paired with IN3 (pin 8) through the switch element. Signal range VSS <= Vout <= VDD.
10	OUT4	bidirectional	Switch 4 analog/digital I/O terminal (bilateral). Paired with IN4 (pin 11) through the switch element. Signal range VSS <= Vout <= VDD.
11	IN4	bidirectional	Switch 4 analog/digital I/O terminal (bilateral). Paired with OUT4 (pin 10) through the switch element. Signal range VSS <= Vin <= VDD.
12	CONTROL4	input	Digital control input for switch 4. Logic 0 (VSS) opens the switch (OFF); logic 1 (VDD) closes the switch (ON). Triple-diode protected input.
13	CONTROL1	input	Digital control input for switch 1. Logic 0 (VSS) opens the switch (OFF); logic 1 (VDD) closes the switch (ON). Triple-diode protected input.
14	VDD	power_in	Positive supply. Absolute maximum 18 V; operating range 3.0 to 18 Vdc referenced to VSS. Sets the upper bound of both the logic high threshold and the switch signal range.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOP-14
Category	Interface
Pins	14

Ordering variants

Same part, different packaging or reel option.

MC14066BDR2G
MC14066BDR2GDG
MC14066BDR2GF
MC14066BDR2GDT
MC14066BDR2GDTR2

CAD (KiCad official)

Symbol: MC14066BDR2G
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc14066bdr2g.step`	195 KB	You want the bare part, or you mark your own boards.
`mc14066bdr2g-etched.step`	3.0 MB	You want the part with `MC14066BDR2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 726 faces against 237 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: onsemi datasheet (11 pp, sha256 20e7638a2f02da1e, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF