The **4512-R** (often associated with the **CD4512** series) is a high-speed CMOS 8-channel data selector or multiplexer. It is designed for use in digital circuits where one of eight data inputs needs to be routed to a single output based on a binary address. --- ## 1. Technical Specifications The "R" suffix typically refers to the packaging (e.g., Reel) or a specific manufacturer's revision, but the core functionality remains consistent with the CD4512B standard. | Parameter | Value/Range | | :--- | :--- | | **Logic Family** | CMOS 4000 Series | | **Supply Voltage (Vcc/Vdd)** | 3V to 18V | | **Number of Inputs** | 8 Data Inputs | | **Control Inputs** | 3 Address Lines (A, B, C) | | **Output Type** | 3-State (High, Low, High-Impedance) | | **Operating Temperature** | -55°C to +125°C | --- ## 2. Pin Configuration and Functions The 4512-R operates using address lines to select which input pin is mirrored at the output. ### Pinout Description | Pin Name | Type | Description | | :--- | :--- | :--- | | **X0 - X7** | Input | The 8 individual data input channels. | | **A, B, C** | Input | Binary address lines (2^3 = 8 combinations). | | **Inhibit (INH)** | Input | When HIGH, the output is forced to 0. | | **Output Enable (OE)** | Input | When HIGH, the output enters a high-impedance (tri-state) mode. | | **Z** | Output | The selected data output. | --- ## 3. Key Features * **3-State Logic:** The output can be disconnected from the bus (High-Z), allowing multiple 4512 chips to be connected to the same output line. * **Low Power Consumption:** Being a CMOS device, it draws very little current, making it ideal for battery-powered applications. * **Wide Voltage Range:** It can interface with various logic levels without needing complex voltage regulators. --- ## 4. Common Applications 1. **Data Routing:** Selecting one signal from multiple sensors to be read by a single microcontroller pin. 2. **Digital Signal Multiplexing:** Switching between different digital data streams. 3. **Function Generators:** Used in logic circuits to create specific Boolean logic outputs. 4. **Parallel-to-Serial Conversion:** Converting 8 parallel bits into a serial bit stream by cycling through the address pins. ---