component
MC74VHC4066DR2G
Public Made by Adomby adom
onsemi Analog Switches, Multiplexers, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MC74VHC4066DR2G
onsemi · Analog Switches, Multiplexers · SOIC-14
MC74VHC4066DR2G from onsemi, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | XA | bidirectional | Analog input/output of switch A; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 2 | YA | bidirectional | Analog output/input of switch A; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 3 | YB | bidirectional | Analog output/input of switch B; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 4 | XB | bidirectional | Analog input/output of switch B; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 5 | B ON/OFF CONTROL | input | Digital control for switch B: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 6 | C ON/OFF CONTROL | input | Digital control for switch C: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 7 | GND | power_in | Ground reference; all analog and digital voltages are referenced to GND. |
| 8 | XC | bidirectional | Analog input/output of switch C; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 9 | YC | bidirectional | Analog output/input of switch C; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 10 | YD | bidirectional | Analog output/input of switch D; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 11 | XD | bidirectional | Analog input/output of switch D; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 12 | D ON/OFF CONTROL | input | Digital control for switch D: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 13 | A ON/OFF CONTROL | input | Digital control for switch A: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 14 | VCC | power_in | Positive DC supply, 2.0 V to 12.0 V referenced to GND (absolute maximum −0.5 V to +14.0 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-14 |
| Category | Interface |
| Pins | 14 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Positive DC Supply Voltage (Referenced to GND) | VCC | -0.5 | 14 | V | Referenced to GND | 2 | |
| Analog Input Voltage (Referenced to GND) | VIS | -0.5 | V | Printed max is VCC + 0.5 V (non-numeric, left null) | 2 | ||
| Digital Input Voltage (Referenced to GND) | Vin | -0.5 | V | Printed max is VCC + 0.5 V (non-numeric, left null) | 2 | ||
| DC Current Into or Out of Any Pin | I | -25 | 25 | mA | 2 | ||
| Power Dissipation in Still Air, SOIC Package | PD | 500 | mW | Still air, SOIC package | 2 | ||
| Storage Temperature | Tstg | -65 | 150 | °C | 2 | ||
| Lead Temperature | TL | 260 | °C | 1 mm from case for 10 seconds | 2 | ||
| Positive DC Supply Voltage (Referenced to GND) | VCC | 2 | 12 | V | Referenced to GND | 2 | |
| Static or Dynamic Voltage Across Switch | VIO* | 1.2 | V | 2 | |||
| Operating Temperature, All Package Types | TA | -55 | 125 | °C | All package types | 2 | |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | 1000 | ns | Figure 14; VCC = 2.0 V | 2 | |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | 600 | ns | Figure 14; VCC = 3.0 V | 2 | |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | 500 | ns | Figure 14; VCC = 4.5 V | 2 | |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | 400 | ns | Figure 14; VCC = 9.0 V | 2 | |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | 250 | ns | Figure 14; VCC = 12.0 V | 2 | |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 1.5 | V | Ron = Per Spec; VCC = 2.0 V | 3 | ||
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 2.1 | V | Ron = Per Spec; VCC = 3.0 V | 3 | ||
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 3.15 | V | Ron = Per Spec; VCC = 4.5 V | 3 | ||
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 6.3 | V | Ron = Per Spec; VCC = 9.0 V | 3 | ||
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 8.4 | V | Ron = Per Spec; VCC = 12.0 V | 3 | ||
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | 0.5 | V | Ron = Per Spec; VCC = 2.0 V | 3 | ||
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | 0.9 | V | Ron = Per Spec; VCC = 3.0 V | 3 | ||
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | 1.35 | V | Ron = Per Spec; VCC = 4.5 V | 3 | ||
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | 2.7 | V | Ron = Per Spec; VCC = 9.0 V | 3 | ||
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | 3.6 | V | Ron = Per Spec; VCC = 12.0 V | 3 | ||
| Maximum Input Leakage Current, ON/OFF Control Inputs | Iin | -0.1 | 0.1 | μA | Vin = VCC or GND; VCC = 12.0 V; −55 to 25°C | 3 | |
| Maximum Input Leakage Current, ON/OFF Control Inputs | Iin | -1 | 1 | μA | Vin = VCC or GND; VCC = 12.0 V; 85°C | 3 | |
| Maximum Quiescent Supply Current (per Package) | ICC | 2 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; −55 to 25°C | 3 | ||
| Maximum Quiescent Supply Current (per Package) | ICC | 20 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; 85°C | 3 | ||
| Maximum Quiescent Supply Current (per Package) | ICC | 40 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; 125°C | 3 | ||
| Maximum Quiescent Supply Current (per Package) | ICC | 4 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 12.0 V; −55 to 25°C | 3 | ||
| Maximum Quiescent Supply Current (per Package) | ICC | 160 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 12.0 V; 125°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 120 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; −55 to 25°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 160 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; 85°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 200 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; 125°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 70 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; −55 to 25°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 85 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; 85°C | 3 | ||
| Maximum On-Resistance (Ron) | Ron | 100 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; 125°C | 3 | ||
| Maximum Difference in On-Resistance Between Channels | ΔRon | 20 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; −55 to 25°C | 3 | ||
| Maximum Difference in On-Resistance Between Channels | ΔRon | 25 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; 85°C | 3 | ||
| Maximum Difference in On-Resistance Between Channels | ΔRon | 30 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; 125°C | 3 | ||
| Maximum Difference in On-Resistance Between Channels | ΔRon | 15 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 9.0 V; −55 to 25°C | 3 | ||
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | 0.1 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; −55 to 25°C | 3 | ||
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | 0.5 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; 85°C | 3 | ||
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | 1 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; 125°C | 3 | ||
| Maximum On-Channel Leakage Current, Any One Channel | Ion | 0.1 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; −55 to 25°C | 3 | ||
| Maximum On-Channel Leakage Current, Any One Channel | Ion | 0.5 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; 85°C | 3 | ||
| Maximum On-Channel Leakage Current, Any One Channel | Ion | 1 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; 125°C | 3 | ||
| Maximum Capacitance, ON/OFF Control Input | C | 10 | pF | 4 | |||
| Maximum Capacitance, Analog I/O | 35 | pF | Control input = GND; analog I/O | 4 |
CAD (KiCad official)
- Symbol:
MC74VHC4066DR2G - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
mc74vhc4066dr2g-etched.step/mc74vhc4066dr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc74vhc4066dr2g.step/mc74vhc4066dr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (15 pp, sha256
1f9978ff69042709, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# MC74VHC4066DR2G
**onsemi** · Analog Switches, Multiplexers · SOIC-14
MC74VHC4066DR2G from onsemi, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | XA | bidirectional | Analog input/output of switch A; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 2 | YA | bidirectional | Analog output/input of switch A; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 3 | YB | bidirectional | Analog output/input of switch B; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 4 | XB | bidirectional | Analog input/output of switch B; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 5 | B ON/OFF CONTROL | input | Digital control for switch B: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 6 | C ON/OFF CONTROL | input | Digital control for switch C: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 7 | GND | power_in | Ground reference; all analog and digital voltages are referenced to GND. |
| 8 | XC | bidirectional | Analog input/output of switch C; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 9 | YC | bidirectional | Analog output/input of switch C; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 10 | YD | bidirectional | Analog output/input of switch D; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 11 | XD | bidirectional | Analog input/output of switch D; for proper operation Vin and Vout should be constrained to the range GND to VCC. |
| 12 | D ON/OFF CONTROL | input | Digital control for switch D: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 13 | A ON/OFF CONTROL | input | Digital control for switch A: high (VCC) turns the switch on and low (GND) turns it off; it should be driven at VCC or GND logic levels. |
| 14 | VCC | power_in | Positive DC supply, 2.0 V to 12.0 V referenced to GND (absolute maximum −0.5 V to +14.0 V). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-14 |
| Category | Interface |
| Pins | 14 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Positive DC Supply Voltage (Referenced to GND) | VCC | -0.5 | | 14 | V | Referenced to GND | 2 |
| Analog Input Voltage (Referenced to GND) | VIS | -0.5 | | | V | Printed max is VCC + 0.5 V (non-numeric, left null) | 2 |
| Digital Input Voltage (Referenced to GND) | Vin | -0.5 | | | V | Printed max is VCC + 0.5 V (non-numeric, left null) | 2 |
| DC Current Into or Out of Any Pin | I | -25 | | 25 | mA | | 2 |
| Power Dissipation in Still Air, SOIC Package | PD | | | 500 | mW | Still air, SOIC package | 2 |
| Storage Temperature | Tstg | -65 | | 150 | °C | | 2 |
| Lead Temperature | TL | | | 260 | °C | 1 mm from case for 10 seconds | 2 |
| Positive DC Supply Voltage (Referenced to GND) | VCC | 2 | | 12 | V | Referenced to GND | 2 |
| Static or Dynamic Voltage Across Switch | VIO* | | | 1.2 | V | | 2 |
| Operating Temperature, All Package Types | TA | -55 | | 125 | °C | All package types | 2 |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | | 1000 | ns | Figure 14; VCC = 2.0 V | 2 |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | | 600 | ns | Figure 14; VCC = 3.0 V | 2 |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | | 500 | ns | Figure 14; VCC = 4.5 V | 2 |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | | 400 | ns | Figure 14; VCC = 9.0 V | 2 |
| Input Rise and Fall Time, ON/OFF Control Inputs | tr, tf | 0 | | 250 | ns | Figure 14; VCC = 12.0 V | 2 |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 1.5 | | | V | Ron = Per Spec; VCC = 2.0 V | 3 |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 2.1 | | | V | Ron = Per Spec; VCC = 3.0 V | 3 |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 3.15 | | | V | Ron = Per Spec; VCC = 4.5 V | 3 |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 6.3 | | | V | Ron = Per Spec; VCC = 9.0 V | 3 |
| Minimum High-Level Voltage, ON/OFF Control Inputs | VIH | 8.4 | | | V | Ron = Per Spec; VCC = 12.0 V | 3 |
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | | | 0.5 | V | Ron = Per Spec; VCC = 2.0 V | 3 |
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | | | 0.9 | V | Ron = Per Spec; VCC = 3.0 V | 3 |
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | | | 1.35 | V | Ron = Per Spec; VCC = 4.5 V | 3 |
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | | | 2.7 | V | Ron = Per Spec; VCC = 9.0 V | 3 |
| Maximum Low-Level Voltage, ON/OFF Control Inputs | VIL | | | 3.6 | V | Ron = Per Spec; VCC = 12.0 V | 3 |
| Maximum Input Leakage Current, ON/OFF Control Inputs | Iin | -0.1 | | 0.1 | μA | Vin = VCC or GND; VCC = 12.0 V; −55 to 25°C | 3 |
| Maximum Input Leakage Current, ON/OFF Control Inputs | Iin | -1 | | 1 | μA | Vin = VCC or GND; VCC = 12.0 V; 85°C | 3 |
| Maximum Quiescent Supply Current (per Package) | ICC | | | 2 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; −55 to 25°C | 3 |
| Maximum Quiescent Supply Current (per Package) | ICC | | | 20 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; 85°C | 3 |
| Maximum Quiescent Supply Current (per Package) | ICC | | | 40 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 6.0 V; 125°C | 3 |
| Maximum Quiescent Supply Current (per Package) | ICC | | | 4 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 12.0 V; −55 to 25°C | 3 |
| Maximum Quiescent Supply Current (per Package) | ICC | | | 160 | μA | Vin = VCC or GND; VIO = 0 V; VCC = 12.0 V; 125°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 120 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; −55 to 25°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 160 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; 85°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 200 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 4.5 V; 125°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 70 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; −55 to 25°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 85 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; 85°C | 3 |
| Maximum On-Resistance (Ron) | Ron | | | 100 | Ω | Vin = VIH; VIS = VCC to GND; IS ≤ 2.0 mA; VCC = 9.0 V; 125°C | 3 |
| Maximum Difference in On-Resistance Between Channels | ΔRon | | | 20 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; −55 to 25°C | 3 |
| Maximum Difference in On-Resistance Between Channels | ΔRon | | | 25 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; 85°C | 3 |
| Maximum Difference in On-Resistance Between Channels | ΔRon | | | 30 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 4.5 V; 125°C | 3 |
| Maximum Difference in On-Resistance Between Channels | ΔRon | | | 15 | Ω | Vin = VIH; VIS = 1/2 (VCC − GND); IS ≤ 2.0 mA; VCC = 9.0 V; −55 to 25°C | 3 |
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | | | 0.1 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; −55 to 25°C | 3 |
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | | | 0.5 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; 85°C | 3 |
| Maximum Off-Channel Leakage Current, Any One Channel | Ioff | | | 1 | μA | Vin = VIL; VIO = VCC or GND; switch off; VCC = 12.0 V; 125°C | 3 |
| Maximum On-Channel Leakage Current, Any One Channel | Ion | | | 0.1 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; −55 to 25°C | 3 |
| Maximum On-Channel Leakage Current, Any One Channel | Ion | | | 0.5 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; 85°C | 3 |
| Maximum On-Channel Leakage Current, Any One Channel | Ion | | | 1 | μA | Vin = VIH; VIS = VCC or GND; VCC = 12.0 V; 125°C | 3 |
| Maximum Capacitance, ON/OFF Control Input | C | | | 10 | pF | | 4 |
| Maximum Capacitance, Analog I/O | | | | 35 | pF | Control input = GND; analog I/O | 4 |
## CAD (KiCad official)
- Symbol: `MC74VHC4066DR2G`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `mc74vhc4066dr2g-etched.step` / `mc74vhc4066dr2g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc74vhc4066dr2g.step` / `mc74vhc4066dr2g.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588929095182782464) (15 pp, sha256 `1f9978ff69042709`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/mc74vhc4066dr2g-datasheet.pdf)