DIP IC 74ls173


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The 74LS173 is a widely used integrated circuit (IC) that belongs to the 74LSxx series of TTL (Transistor-Transistor Logic) devices. Specifically, the 74LS173 is a 4-bit D-type synchronous binary counter with clear. Here are the key features and details of the 74LS173 IC:

1. **Function:** The 74LS173 is a 4-bit binary counter, which means it can count from 0 to 15 in binary (0000 to 1111) and has four data inputs (D0 to D3). It can also be used as a 4-bit parallel load register or as a toggle flip-flop.

2. **Synchronous Operation:** The 74LS173 operates synchronously, meaning it updates its output based on the clock signal. Data is transferred to the outputs only when the clock input (CP) goes high (on the rising edge of the clock).

3. **Clear Function:** The 74LS173 includes a Clear (CLR) input that allows you to reset the counter to its initial state (0000). When the Clear input is activated, the counter’s outputs are cleared.

4. **Parallel Load:** The IC has a Parallel Load (PL) input, which allows you to load data directly into the counter. When PL is active, the data on the D0-D3 inputs is transferred to the outputs.

5. **Carry Output:** The 74LS173 generates a carry output (C4) when the count reaches 15 (1111) and an up-count is enabled.

6. **Clock Inputs:** It has both a Clock Enable (CE) and a Count Up (CU) input, allowing you to control the counting direction. When CU is high and CE is active, the counter increments with each clock pulse. When CE is low, the counter holds its current state.

7. **Voltage Compatibility:** The 74LS173 is designed to work with 5-volt TTL logic levels. It is not directly compatible with modern 3.3V or 2.5V logic systems without level shifting.

8. **DIP Package:** The 74LS173 is typically available in a Dual In-Line Package (DIP), which is a through-hole package with 16 pins that can be easily inserted into a breadboard or soldered onto a PCB.

9. **Applications:** The 74LS173 is commonly used in digital circuits for tasks that involve counting, parallel data loading, or toggling operations. It can be used in various applications, including frequency dividers, sequence generators, and more.

The 74LS173 is a versatile IC that can be employed in a variety of digital circuit designs. Its ability to count, parallel load, and clear data makes it a valuable component for various applications in digital electronics and microcontroller projects.


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