MM74C165N

Series:	74C
Packaging:	Tube
Part Status:	Obsolete
Logic Type:	Shift Register
Output Type:	Complementary
Number of Elements:	1
Number of Bits per Element:	8
Function:	Parallel or Serial to Serial
Voltage - Supply:	3 V ~ 15 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-DIP
Base Part Number:	74C165

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MM74C165N is a type of logic device categorized as a shift register. It is a logic device primarily used to convert parallel input data into serial output data. The device consists of a series of cascaded D-type flip-flops whose outputs are fed into the shift register, with the initial output state determined by the data loaded into the parallel inputs.The primary application field of MM74C165N is in the interfacing of two systems with different data formats, such as synchronous and asynchronous, or parallel and serial. Furthermore, the device is also used in data manipulation and communications, as well as logic functions over multiple clock cycles.This logic device operates within a wide range of temperatures, from -40 to +85 degrees Celsius. The loading of the flip-flops is synchronized to the rising edge of the clock signal due to the incorporation of a data-holding register that holds the parallel input data during loading. The data is fed out of the device on the falling edge of the clock signal serially.The 74C165N is capable of operating with both positive and negative logic, as well as additional logic levels, namely high-impedance levels. When the high-impedance logic levels are employed, the parallel inputs of the device can be left floating in order to maintain the device\'s pre-defined logic state. The logic levels are determined by the device\'s VIL and VIH pins, which are also TTL compatible.The device is built around a basic architecture of 16 internal shift register stages and a data-holding register capable of storing 16-bit parallel words. Each of the 16 flip-flops has one data latch which is connected to the data-holding register. The data is clocked into the data-holding register with the rising edge of the RC clock signal, and is then shifted out serially on the falling edge of the CL clock signal.Each shift register stage can also be enabled with its own clock signal, which allows for data to be shifted through at a different rate than the master clock. External enable functions are also available to control the logic state of each stage. Furthermore, the device is also equipped with synchronous reset and overflow detect pins to reset the overall logic state of the device. In conclusion, the MM74C165N is a logic device of the shift register family that is used in a variety of applications for data conversion and manipulation. It is a fast and reliable device that is capable of operating over a wide temperature range and can be used in both synchronous and asynchronous systems. It also has a wide range of customisable options, allowing for more flexibility and precise control over the logic state of the device.

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