MC74ACT161N

Timing:	Synchronous
Base Part Number:	74ACT161
Supplier Device Package:	16-DIP
Package / Case:	16-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	4.5V ~ 5.5V
Trigger Type:	Positive Edge
Count Rate:	125MHz
Series:	74ACT
Reset:	Asynchronous
Number of Bits per Element:	4
Number of Elements:	1
Direction:	Up
Logic Type:	Binary Counter
Part Status:	Obsolete
Packaging:	Tube

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Logic - Counters, Dividers

The MC74ACT161N is a programmable, 4-bit binary counter with asynchronous reset, a 4-bit latch-enable output, and a programmable 4-bit output. It is a synchronous programmable counter, and is available in 20-pin DIP Package. The MC74ACT161N can be used as a programmable divide-by-N counter, or in other counters and dividers applications.The MC74ACT161N can be used to build a wide range of counters, dividers, and other devices. Its asynchronous reset signal is useful for resetting counters and dividers, and its latch-enable signal allows the user to select which output bits (and hence, their values) will remain unchanged while the counting or dividing process is in motion. The programmable 4-bit output provides users with the flexibility to create a variety of devices with different output sequences. The MC74ACT161N works based on the principle of synchronous programmable counters. When a high-to-low signal transition is detected on the pulse input pin, the value of the latch-enable bit and output bit are toggled. The value of the output bit and latency-enable bit are selected by the user depending on the desired application. For example, a divide-by-5 counter can be created by setting the latch-enable bit to ‘1’ and the output bit to ‘0’, so that the counter will only toggle when all five clock cycles have been completed. The same bit settings can be used to create a modulo-4 counter that counts from 0 to 3, and when the count reaches 4, the counter will reset to 0.The MC74ACT161N can also be used to build devices such as rate generators, frequency dividers, and timer circuits. A rate generator circuit, for example, can be created by setting the latch-enable bit to ‘1’ and the output bit to ‘0’, so that the pulse input signal will toggle the output bit at a predetermined rate, based on the clock input frequency. Similarly, a frequency divider can be built by setting the latch-enable bit to ‘1’ and the output bit to ‘1’, so that each input pulse will be divided by the clock frequency and the output bit will have a frequency that is half of the clock frequency.The MC74ACT161N is an extremely versatile device that can be used in a wide range of applications. Its asynchronous reset input, latch-enable output, and programmable 4-bit output provide users with the flexibility to create a variety of different devices with different output sequences. Furthermore, its synchronous programmable counter design ensures reliable operation in demanding applications.

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