CD40194BPWRE4

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The CD40194BPWRE4 is part of the family of logic shift registers, which are a collection of logic devices designed to transfer a bit sequence from one register to another sequentially. As its name suggests, the CD40194BPWRE4 is a 4-bit shift register that is usually programmed by the use of an external clock, a mode selection control (MS=0 and MS=1) and some logic input signals. It comprises four individual 4-bit registers which can be cascaded in a chain to add register length per device.

CD40194BPWRE4 application field and working principle
CD40194BPWRE4, manufactured by Texas Instruments is a universal shift register with many applications in digital electronics. It is used for data storage, data transfer, pattern generation and for sequential switching applications. Some of its most common applications include 4-bit down counters, shift registers and up/down counters. It can also be used in data encryption, counter applications with parallel and serial output, and to control stepper motor.

The CD40194BPWRE4 contains four internal cascaded 4-bit registers. The logic input signals are applied to the two control pins MR and MC, while the CLK in/out pins control the transfer of data. When MR is activated, each register shifts its current content to the right by one bit. If MC is active, the content of each register is shifted to the left one bit. If both pins MR and MC are inactive, no action occurs and the register content remains unchanged. This allows for the construction of a 4-bit counter, using the MC/MR pattern of 00, 01, 10 and 11, so that the content of the registers increase in steps of one and can be used for timing and control applications.

The CLK is the external clock pulse which determines the data transfer timing and is controlled by the MC and MR pins. The clock cycle begins when MR is active, the data is shifted one bit to the right and the internal clock is restarted. When the data transfer is complete, the CLK goes low, the next cycle begins and the data is shifted as specified by MC and MR. Therefore, all four registers need to be active in order to keep the CLK clocking data until the desired events occurs.

In addition, the CD40194BPWRE4 contains an enable pin which is active when low, it can be used to prevent the data from being shifted. The enable pin must be held at a logic "low" voltage during the entire time data is being shifted. The enable pin must be released in order for the data to be shifted. The enable pin can also be used for synchronous or asynchronous reset of the registers. Upon applying a logic low to the enable pin, all four registers will reset to the low logic state.

The CD40194BPWRE4 shift register is widely used in data storage and data transfer applications. It can be used in the construction of counters, shift registers, encoders, decoders and multiplexers. It can also be used in the implementation of serialized parallel data converters and latches, as well as in stepper motor controller applications. The inherent ability to shift data left or right makes the CD40194BPWRE4 an ideal device for applications where data buffering, address decoding and data gating are required.

CD40194BPWRE4 is a versatile logic device which can be used to implement many digital logic functions in a wide variety of applications. Its ability to shift data from one register to the next, its low power specification and its fast operating speed make it an ideal choice for a wide range of applications. With its robust design and its flexibility for data storage and data transfer, the CD40194BPWRE4 is a great choice when you need a reliable, low cost, high performance shift register.

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