SN74HC163DR – TEXAS INSTRUMENTS

The SN74HC163DR is a high-speed, CMOS 4-bit binary counter with synchronous parallel load capability, housed in a 16-pin SOIC package. Operating from a wide voltage range of 2V to 6V, it offers a maximum clock frequency exceeding 35MHz (Vcc = 5V) and a typical propagation delay of 15ns (Vcc = 5V). The device features four count outputs (Q0-Q3), a ripple clock input (CLK), a load input (LD), an enable input (ENP/ENT), and a synchronous clear input (CLR). The synchronous operation ensures stable counting even with high-frequency clocks._x000D_
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The SN74HC163DR’s parallel load capability enables rapid initialization or data manipulation, while the enable inputs provide flexible control over counting sequences. Common applications include frequency division, pulse counting, digital timing circuits, and state machines within larger digital systems. Its CMOS architecture offers low power consumption and high noise immunity compared to TTL equivalents, making it suitable for portable or battery-powered applications. The wide operating voltage range enhances design flexibility across different power supply schemes. However, designers should note the relatively high current draw at higher clock frequencies.