The part number **4053** (often found as CD4053, HEF4053, or MC14053) refers to a **Triple 2-Channel Analog Multiplexer/Demultiplexer**. It is a member of the standard CMOS 4000 series logic family. --- ## 1. Core Functionality The 4053 contains three independent digitally controlled switches. Each switch has one common terminal and two independent input/output terminals. It can handle both **digital** and **analog** signals (such as audio or video). | Feature | Description | | :--- | :--- | | **Channels** | 3 independent channels (A, B, and C) | | **Configuration** | Single-Pole Double-Throw (SPDT) equivalent | | **Signal Type** | Analog or Digital | | **Control** | Digital logic levels (High/Low) | --- ## 2. Pinout Configuration The 4053 typically comes in a 16-pin package (DIP, SOIC, or TSSOP). | Pin No. | Name | Function | | :--- | :--- | :--- | | 1, 2 | 2Y, 2Z | Channel B inputs/outputs | | 3, 5 | 3Y, 3Z | Channel C inputs/outputs | | 4 | 3-COM | Common terminal for Channel C | | 6 | INHIBIT | Disables all channels when High | | 7 | $V_{EE}$ | Negative supply / Analog ground | | 8 | $V_{SS}$ | Digital Ground (0V) | | 9, 10, 11 | C, B, A | Control lines (Selects Y or Z) | | 12, 13 | 1Z, 1Y | Channel A inputs/outputs | | 14 | 1-COM | Common terminal for Channel A | | 15 | 2-COM | Common terminal for Channel B | | 16 | $V_{DD}$ | Positive Supply Voltage | --- ## 3. Key Technical Specifications The "15" in your query likely refers to the **15V maximum operating voltage**, which is a standard limit for the CD4000 series. * **Supply Voltage ($V_{DD}$ - $V_{SS}$):** 3V to 15V (some versions up to 18V). * **Dual Supply Support:** It can handle bipolar signals (e.g., -5V to +5V) by connecting $V_{EE}$ to a negative rail. * **Low "ON" Resistance:** Typically $125\Omega$ to $280\Omega$ depending on voltage. * **High "OFF" Leakage:** Minimal signal bleed when the switch is open. --- ## 4. Common Applications 1. **Audio Switching:** Routing different audio sources to a single amplifier. 2. **Analog-to-Digital Conversion:** Multiplexing several sensor inputs into one ADC pin of a microcontroller. 3. **Signal Gating:** Using the "Inhibit" pin to shut off signal paths instantly. 4. **Digital Logic:** Acting as a simple hardware-level logic selector. ---