onsemi MC74HC4066ADR2 Quad Bilateral Switch: Datasheet, Application Circuit, and Pinout Configuration

The MC74HC4066ADR2 from onsemi is a high-performance quad bilateral switch integrated circuit fabricated with high-speed silicon-gate CMOS technology. This device is designed to function as a high-performance analog/digital switch, making it an essential component in a wide array of electronic systems for signal routing, modulation, and multiplexing applications.

Pinout Configuration

The MC74HC4066ADR2 is housed in a 14-pin SOIC package. Its pinout is standardized for easy integration.

Pins 1, 3, 8, 10: Input/Output terminals for the four independent switches.

Pins 2, 4, 9, 11: Output/Input terminals for the switches.

Pins 5, 6, 12, 13: Digital Control Inputs for each switch (e.g., Pin 13 controls the switch connected to Pins 8 & 9).

Pin 7: Ground (GND).

Pin 14: Supply Voltage (VCC).

A critical feature of this IC is that the control input voltage is referenced to the GND pin, allowing for straightforward interfacing with digital logic families like HC/HCT.

Key Datasheet Specifications

The device's operational characteristics, as defined in its datasheet, make it suitable for both analog and digital signals.

Wide Operating Voltage Range: 2.0 V to 6.0 V, compatible with various logic levels.

Low "On" Resistance: Typically 70 Ω at VCC = 4.5 V, ensuring minimal signal attenuation.

High "Off" Isolation: Excellent signal separation when the switch is open.

Low Quiescent Current: Minimal power consumption in standby mode.

Fast Switching Speeds: Enables operation in high-frequency signal paths.

Break-Before-Make Action: Prevents short-circuiting during switching transitions.

Application Circuit

A fundamental application of the MC74HC4066ADR2 is in analog signal multiplexing. A typical circuit involves using multiple switches within the package to route different analog signals to a single output, such as the input of an Analog-to-Digital Converter (ADC).

How it works:

1. Analog inputs (e.g., from sensors) are connected to the input pins of the different switches.

2. The common output of all switches is tied together and connected to the ADC input.

3. A digital microcontroller sequentially applies a HIGH logic level to one control pin at a time.

4. When a control pin is HIGH, its corresponding switch closes, connecting its analog signal to the ADC. The other switches remain open, isolating their signals.

5. This allows a single ADC to sample multiple analog channels efficiently.

Other common applications include sample-and-hold circuits, audio and video signal routing, programmable gain amplifiers, and digital logic gating.

ICGOODFIND Summary

The onsemi MC74HC4066ADR2 is a versatile and reliable quad bilateral switch IC, prized for its low on-resistance, wide voltage range, and CMOS-level control. Its ability to seamlessly handle both analog and digital signals makes it a fundamental building block for multiplexing, signal gating, and modulation designs across consumer, industrial, and communication electronics.

Keywords:

1. Analog Switch

2. Signal Multiplexing

3. CMOS Technology

4. Low On-Resistance

5. Quad Bilateral