component
CD74HC4066
Public Made by Adomby adom
TI quad bilateral (analog) switch, SOIC-14. Four SPST switches, low on-resistance, 2-6 V. Datasheet-verified.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCD74HC4066
Texas Instruments · Quad bilateral analog switch · SOIC-14
Four independent bilateral (analog) switches in a SOIC-14, the CMOS-logic sibling of the classic CD4066. Each switch is a transmission gate that passes a signal in either direction when its control pin is high and blocks it when low, with a low on-resistance and no fixed input/output distinction. Because it passes analog as well as digital signals, it routes audio, sensor, and reference voltages, builds simple multiplexers and sample-and-hold front ends, and gates control signals. Keep signals within the supply rails. Runs 2-6 V. This page ships the KiCad CD4066 symbol, which is pin-identical.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1Y | bidirectional | Switch 1 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 1Z when 1E is high. Handles analog voltages between GND and Vcc. |
| 2 | 1Z | bidirectional | Switch 1 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 1Y when 1E is high. |
| 3 | 2Z | bidirectional | Switch 2 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 2Y when 2E is high. |
| 4 | 2Y | bidirectional | Switch 2 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 2Z when 2E is high. |
| 5 | 2E | input | Switch 2 enable/control input. High level (>= VIH) closes the switch between 2Y and 2Z; low level opens it. CMOS logic input referenced to VCC/GND. |
| 6 | 3E | input | Switch 3 enable/control input. High level (>= VIH) closes the switch between 3Y and 3Z; low level opens it. CMOS logic input referenced to VCC/GND. |
| 7 | GND | power_in | Ground reference (0 V). Return current path for the device supply and lower bound of the recommended analog signal range. |
| 8 | 3Y | bidirectional | Switch 3 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 3Z when 3E is high. |
| 9 | 3Z | bidirectional | Switch 3 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 3Y when 3E is high. |
| 10 | 4Z | bidirectional | Switch 4 analog I/O terminal (Z side). Bidirectional analog signal path connected internally to 4Y when 4E is high. |
| 11 | 4Y | bidirectional | Switch 4 analog I/O terminal (Y side). Bidirectional analog signal path connected internally to 4Z when 4E is high. |
| 12 | 4E | input | Switch 4 enable/control input. High level (>= VIH) closes the switch between 4Y and 4Z; low level opens it. CMOS logic input referenced to VCC/GND. |
| 13 | 1E | input | Switch 1 enable/control input. High level (>= VIH) closes the switch between 1Y and 1Z; low level opens it. CMOS logic input referenced to VCC/GND. |
| 14 | VCC | power_in | Positive supply. 2 V to 10 V for HC types; 4.5 V to 5.5 V for HCT type. Sets the upper bound for analog signal swing and the CMOS logic-input thresholds on the E pins. |
Key specifications
| Parameter | Value |
|---|---|
| Type | Quad bilateral analog switch |
| Switches | 4 independent SPST (bidirectional) |
| Control | one enable per switch (active-high) |
| On-resistance | ~50 Ω typ at 4.5 V |
| Signal range | rail to rail |
| Supply voltage | 2-6 V |
| Common uses | analog mux, routing, sample-hold |
| Package | SOIC-14 |
Ordering variants
Same part, different packaging or reel option.
CD74HC4066M (SOIC-14, tube)CD74HC4066M96 (SOIC-14, tape & reel)
CAD (KiCad official)
- Symbol:
Analog_Switch:CD4066BE (pin-compatible with CD74HC4066) - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D)
- 3D model files:
cd74hc4066-etched.step/cd74hc4066-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hc4066.step/cd74hc4066.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (25 pp, sha256
3d3eafb15fb8109c, 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).