MC74HC4066ANG

Overview

The MC74HC4066A is a quad analog switch utilizing silicon-gate CMOS technology. It features four independent bilateral switches capable of controlling analog and digital voltages across the full power-supply range (VCC to GND). The device operates on a single supply voltage from 2.0 V to 12.0 V. Key electrical parameters include a maximum ON resistance of 70 Ω at 9.0 V or 12.0 V, with a maximum propagation delay of 80 ns at 2.0 V. The operating temperature range spans from -55°C to +125°C.

Feature Summary

• High-performance silicon-gate CMOS construction for fast switching speeds and low leakage current.
• Improved linearity and lower ON resistance over input voltage compared to metal-gate CMOS equivalents.
• Diode protection integrated on all inputs and outputs to guard against static discharge.
• Control inputs compatible with standard CMOS outputs and LSTTL outputs when pull-up resistors are used.

Applications

• Multiplexer and demultiplexer signal routing
• Sample-and-hold amplifier circuits
• Gate arrays for analog signal selection
• Programmable gain amplifiers

Procurement Notes

Verify the specific package suffix required for the design, such as D for SOIC-14 or DT for TSSOP-14. Confirm RoHS compliance status and check for automotive-grade variants if AEC-Q100 qualification is necessary. Ensure ordering information matches the exact pinout and shipping configuration needed for production.

Selection Notes

Select this component for applications requiring wide voltage swing control up to 12 V. Consider the ON resistance variation across the input voltage range when designing linear signal paths. Verify that the control logic levels match the system's VCC to ensure proper switching thresholds without additional level shifting circuitry.

Part Context

This device belongs to the HC4066A family of quad analog switches. It serves as a high-speed alternative to older metal-gate CMOS devices like the MC14016 and MC14066, offering better performance characteristics in terms of speed and resistance linearity while maintaining pin compatibility.

Replacement Considerations

MC74HC4066ADG

FAQ

How does the ON resistance vary with input voltage?

The ON resistance is more linear over the input voltage range compared to metal-gate CMOS switches, though it increases slightly at the extremes of the supply voltage.

Can unused analog inputs/outputs be left floating?

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

What is the maximum analog input voltage?

The analog input voltage can range from GND to VCC, allowing the switch to handle signals that vary across the entire power-supply range.