74AC163PC

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The 74AC163P is a synchronous presettable 4-bit ripple counter. It is a member of the BCL Series of CMOS Logic integrated circuits from Texas Instruments. The device can count up or down, depending on the direction control signal, and is suitable for applications such as data and address multiplexing, divide-by-n counting, and pulse-width modulation.

The 74AC163P’s main features are that it is a fully static device, that it has low power consumption, and that it has symmetrical power-up and power-down protection. The device’s asynchronous clear input forces the counter to clear, independent of the clock. The active-low enable input disables the count during power-up, and the counter can be reset with logic levels. An active-high carry-out output indicates overflow.

The 74AC163P’s operation can be described in one of two ways—preload count or asynchronous reset count. In preload count operation, after preset data is loaded into the flip-flops, the active-high carry-out output indicates that the entire count cycle has been completed. In asynchronous reset count operation, after preset data is loaded, the counter is reset to zero upon a low logic level at the asynchronous clear input.

The 74AC163P is characterised for operation from 0°C to 70°C. The manufacturer recommends operating the device at an ambient temperature of not above 25°C and at no more than 50°C.

The 74AC163P is well-suited for a wide range of applications. It is a reliable device for generating binary coded or pulse-width modulated signals. It can be used to generate pulse-clocks of precise width in counting systems or for driving counters. It is a cost-effective solution for multiplexers and data selectors, as well as for event counters and time measurement systems. Its low power consumption makes it suitable for battery-powered systems.

The 74AC163P has a very simple and straightforward operating principle. When the active-high clock input is asserted, the counter is incremented by one in the specified direction. When the active-high enable input is asserted, the device enters a reset state and the clock input has no effect. When the active-low asynchronous clear input is asserted, the device enters the reset state regardless of the clock input.

In summary, the 74AC163P is a low-power synchronous presettable 4-bit ripple counter that is well suited for a variety of applications, such as data and address multiplexing, divide-by-N counting, and pulse-width modulation. It is characterized for operation from 0°C to 70°C and is a cost-effective solution for multiplexers, data selectors, event counters, and time measurement systems. Its operation is governed by a very simple operating principle in which the counter is incremented or reset depending on the state of the clock and enable inputs.

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