Overview
The CD4052B is a digitally controlled analog switch implemented using reliable CMOS technology. It features low “ON” impedance and extremely low “OFF” leakage current. Because it is a dual 4-channel multiplexer, it contains two separate 4-to-1 switches controlled by the exact same binary address inputs. This makes it uniquely suited for handling stereo audio signals or differential analog sensor signals (like an XY joystick) without desynchronizing the channels.
Key Features
Bidirectional Signal Flow: Can be used as a multiplexer (4 inputs to 1 output) or a demultiplexer (1 input to 4 outputs).
Analog and Digital Compatible: Handles digital signals up to 20V and analog waveforms up to 20V peak-to-peak.
Stereo Ready: Dual-channel configuration allows you to switch Left and Right audio lines simultaneously.
Low Crosstalk: Internal shielding ensures minimal interference between channels, maintaining clean signal fidelity.
Breadboard Friendly: Housed in a standard 16-pin DIP package, making it effortless for students to use on standard breadboards.
Technical Specifications
| Feature | Specification |
| IC Package | DIP-16 (Through-Hole) |
| Configuration | Dual 4:1 Multiplexer / Demultiplexer |
| Supply Voltage Range | 3V to 20V DC |
| On-State Resistance (Typ) | 125 Ohms (at 15V supply) |
| Control Pins Required | 2 Binary Select Pins (A, B) + 1 Inhibit Pin |
| Operating Temperature | -55°C to 125°C |
| Logic Levels | Compatible with TTL and CMOS |
Common Applications
Analog Pin Expansion: Read up to 8 analog sensors using only a fraction of your Arduino’s pins.
Audio Matrix Switching: Build your own digitally controlled audio input selector for amplifiers.
Signal Gating: Route communication lines (like UART/Serial) between multiple modules.
Automated Test Equipment: Switch test probes across different nodes on a circuit dynamically.
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