CD4066BE Quad Bilateral Switch IC | ATMOSFÆR ENGINEERING

CMOS analog switch IC containing four independent bilateral switches with digital control. Each switch can pass or isolate analog or digital signals bidirectionally. Low on-resistance and wide signal range make it ideal for audio routing, signal switching, analog multiplexing, and sample-and-hold circuits. Compatible with TTL and CMOS logic levels.

Technical Specifications:

• IC Type: CMOS Quad Bilateral Switch
• Package: DIP-14 (Dual In-line Package)
• Number of Switches: 4 independent SPST switches
• Supply Voltage: 3V - 18V (VDD-VSS)
• Typical Operating Voltage: 5V, 12V, 15V
• On-Resistance (Ron): 80Ω typical @ VDD=15V, 125Ω @ VDD=10V
• Off-Resistance (Roff): >1GΩ
• Signal Range: Rail-to-rail (VSS to VDD)
• Switching Time: ~30ns (typical)
• Control Input: CMOS/TTL compatible (one control pin per switch)
• Crosstalk: -50dB @ 1MHz
• Power Consumption: ~0.5μW quiescent @ 5V
• Operating Temperature: -55°C to +125°C
• Logic Threshold: ~50% of VDD

Pin Configuration:

• 4 Switch I/Os: A, B, C, D (each has IN and OUT pins)
• 4 Control Inputs: CONTROL A, B, C, D (HIGH=closed, LOW=open)
• Power: VDD, VSS (and VEE for substrate)

Truth Table (per switch):

• Control = HIGH: Switch CLOSED (signal passes)
• Control = LOW: Switch OPEN (signal blocked)

Features:

• Bidirectional analog/digital signal switching
• Low on-resistance for minimal signal distortion
• Wide supply voltage range
• TTL/CMOS compatible control inputs
• Independent control of each switch
• No charge injection (minimal switching transients)

Applications:

• Audio signal routing and switching
• Analog multiplexing/demultiplexing
• Sample-and-hold circuits
• Signal path switching in instrumentation
• Electronic switches for sensors
• Keyboard matrix scanning
• Analog gate applications
• Arduino/ESP32 analog signal control
• Modular synthesizer CV switching

Comparison to CD4052:

• CD4066: 4 independent SPST switches (simple on/off)
• CD4052: 2x 4:1 multiplexers (address-decoded selection)

Compatible with Arduino, ESP32, and other microcontrollers for digitally-controlled analog signal routing. Commonly used in audio and instrumentation circuits.