SN74AS169ADRE4

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The SN74AS169ADRE4 is part of the Logic family, particularly Counters and Dividers. This device is a programmable 4-bit binary counter with output decoders. At its core, it consists of a 4-bit up/down counter, 4 enable input latches, and output decoder logic. All inputs and outputs are on a 20-pin Dual In-Line Package (DIP) configuration.

The SN74AS169ADRE4 is a fully static, synchronous device that can be used to divide a frequency by any value from two (2) to sixteen (16). It is also capable of being connected for up/down counting without extra logic circuitry.When sync/enable (E) input is LOW, clock (CK) enables the counter to change its state from one count to the other. If the E input is HIGH and then goes LOW, the counter will remain at the present count.

The SN74AS169ADRE4 can be used for a wide range of applications, including frequency division, countdown sequencing and pattern recognition. In a frequency division application, a frequency applied to CK inputs is divided by powers of two and outputs are encoded into a 4-bit binary number. In a countdown sequencing application, a preset count is loaded into the counter and then decremented until a predetermined count is reached. And in a pattern recognition application, the counter cycles through a series of count states until a particular pattern is recognized.

The output decoder logic inside the SN74AS169ADRE4 is enabled upon receiving a HIGH sync/enable (E) signal, which then causes the counter output to be decoded in 4-bit binary form and output at the multiplex outputs (4 - 7). The decoded outputs can be used as control signals, enabling counters to act as coincidence circuits. The SN74AS169ADRE4 also features two buffered inputs, FUN and RESET, which can be used to perform functions such as resetting the counter.

The SN74AS169ADRE4 is a very versatile device that can be used in a wide range of applications. It is an ideal choice for logic circuits where periodic frequency division, countdown sequencing, and pattern recognition are necessary. Its output decoder logic makes it capable of being used as a coincidence circuit, and it is easy to configure and can be used in high-speed applications.

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