MC74HCT4066ADR2G

Overview

The MC74HCT4066ADR2G is a quad analog switch manufactured by onsemi, utilizing silicon-gate CMOS technology. It features four independent bilateral switches designed to control analog and digital voltages across the full power-supply range (VCC to GND). The device operates within a recommended supply voltage of 4.5 V to 5.5 V and supports an analog input voltage range from GND to VCC. Key electrical specifications include a maximum ON resistance of 120 Ω at 25°C and 4.5 V, with a propagation delay of 10 ns. The component is housed in a SOIC-14 package and is rated for operation between -55°C and +125°C.

Feature Summary

• LSTTL compatible inputs allow direct interfacing with standard logic families without additional level shifting.
• High-performance silicon-gate CMOS construction ensures fast switching speeds and low OFF-channel leakage current.
• Improved ON resistance linearity over input voltage compared to older metal-gate CMOS analog switches.

Applications

• Sample-and-hold amplifier circuits
• Multiplexer and demultiplexer signal routing
• Interface between LSTTL/NMOS logic and HCT MOS devices

Procurement Notes

Verify the specific ordering suffix 'R2G' corresponds to the SOIC-14 tape and reel configuration containing 2500 units per reel. Confirm RoHS compliance status and Pb-Free designation as indicated by the 'G' suffix in the marking diagram. Ensure the source document matches the July 2026 Rev. 3 datasheet to validate current manufacturing status and pinout definitions.

Selection Notes

Select this component when LSTTL-compatible control signals are required for analog switching applications. The device is suitable for designs needing a wide operating temperature range up to +125°C. Consider the SOIC-14 package dimensions and thermal dissipation characteristics if high power density is expected in the application environment.

Part Context

This part belongs to the MC74HCT4066A series of quad analog switches. It shares pinout compatibility with the legacy metal-gate CMOS MC14016 and MC14066 devices. The 'ADR2G' suffix specifically denotes the SOIC-14 package variant supplied in tape and reel format for automated assembly processes.

Replacement Considerations

MC74HC4066ADTR2G: HC series with wider voltage range but different input thresholds.

FAQ

What is the maximum static or dynamic voltage that can be applied across the switch terminals?

The maximum static or dynamic voltage across the switch (VIO) is limited to 1.2 V. Exceeding this limit while the switch is on may cause excessive VCC current draw.

How does the ON resistance vary with temperature?

At 4.5 V supply, the maximum ON resistance increases from 120 Ω at -55°C to 200 Ω at +125°C.

Are unused analog inputs/outputs required to be terminated?

Unused analog pins may be left floating, but it is advisable to tie them to VCC or GND through a low-value resistor to minimize crosstalk and feedthrough noise.