74HC165D,652

The 74HC165D and 652 are components in the logic family of shift registers. They are designed to be compatible with multiple logic types, such as TTL, ECL and CMOS, and tend to provide more functions and higher speed than their predecessors, the 74ACT165 and 651.Shift registers are digital circuits that combine bits of data serially (one bit at a time) and shift them through a series of registers as opposed to parallel operation—the opposite of what is done with standard logic gates. When the data is shifted into the register, each new bit is placed in the last available bit location. The purpose of this type of circuit is to store and transfer a finite amount of data in a more time efficient and cost efficient manner than comparable parallel logic.

Application Field

The 74HC165D and 652 are used in multiple applications including message transmission, memory, data thinning, and other logic circuit applications. They are also used in motor control, automotive, industrial, and audio amplification and filtering applications. The 74HC165D allows for a single 6-bit-wide input and can be changed from a serial connection to a parallel connection, while the 74HC652 can change up to eight bits in parallel. Both of these shift registers are beneficial to those applications that must shift or store data quickly or in small quantities.

Working Principle

The working principle of both the 74HC165D and the 652 is quite simple. The register consists of an input/output (I/O) line and a shift register. To receive data, the I/O line must be connected to an outside source such as a microcomputer, keyboard, or other input device. The data is then shifted into the register one bit at a time. Each time the clock line is actuated, all of the bits in the register, including the new bit, are shifted left. The last data bit remains in the register, allowing for continued data transfer until the register has reached its maximum capacity.At this point, the data can be moved from the register back to the outside source. This is achieved by reading the contents of the register one bit at a time, beginning with the first bit and ending with the last bit. The data is transferred from the register serially as it was received. This process is repeated until the data is all transferred.

Conclusion

The 74HC165D and 652 are logic devices that provide a reliable and efficient solution for data transfer and storage when the need arises. By combining parallel and serial data transmission and reception, the 74HC165D and 652 are ideal for applications that require rapid shift or transmission of large quantities of data. As such, they are widely used in many areas of today’s technological world.

74HC4046AD,653	Nexperia USA...	0.18 $	5000	IC PHASE LOCK LOOP W/VCO ...
74HC4046AD,652	Nexperia USA...	0.46 $	522	IC PHASE LOCK LOOP W/VCO ...
74HCT4046ADB,118	Nexperia USA...	0.6 $	1000	IC PLL W/VCO 16SSOP
74HCT4046ADB,112	Nexperia USA...	0.73 $	1000	IC PLL W/VCO 16-SSOP
74HC4046APW,118	Nexperia USA...	0.2 $	1000	IC PHASE LOCK LOOP W/VCO ...
74HC4046APW,112	Nexperia USA...	0.21 $	1000	IC PHASE LOCK LOOP W/VCO ...
74HCT9046AD,118	Nexperia USA...	0.83 $	1000	IC PLL BAND GAP CNTRL VCO...
74HCT9046AD,112	Nexperia USA...	1.98 $	442	IC PLL BAND GAP CNTRL VCO...
74HCT4046AD,118	Nexperia USA...	0.2 $	1000	IC PLL W/VCO 16SOIC
74HCT4046AD,112	Nexperia USA...	0.5 $	900	IC PHASE LOCK LOOP W/VCO ...
74HC4046ADB,118	Nexperia USA...	0.41 $	1000	IC PHASE LOCK LOOP W/VCO ...
74HC4046ADB,112	Nexperia USA...	0.98 $	428	IC PLL W/VCO 16-SSOP
74HC4046	MICROSS/On S...	2.77 $	1000	DIE PHASE-LOOK LOOP
74HC7046AD,118	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HC7046AD,112	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HCT9046APW,118	Nexperia USA...	0.0 $	1000	IC PLL W/BAND GAP VCO 16T...
74HCT9046APW,112	Nexperia USA...	0.0 $	1000	IC PLL W/BAND GAP VCO 16-...
74HCT7046AD,118	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HCT7046AD,112	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HCT9046AN,112	NXP USA Inc	0.0 $	1000	IC PLL W/BAND GAP VCO 16-...
74HC7046ADB,118	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HC7046ADB,112	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HC7046AN,112	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HCT7046AN,112	NXP USA Inc	0.0 $	1000	IC PLL W/LOCK DETECTOR 16...
74HC4046AN,652	NXP USA Inc	0.0 $	1000	IC PHASE LOCK LOOP W/VCO ...
74HC5555N,112	NXP USA Inc	0.0 $	1000	IC OSC TIMER W/OSC 89MHZ ...
74HCT5555N,112	NXP USA Inc	0.0 $	1000	IC OSC TIMER W/OSC 75MHZ ...
74HCT5555D,118	NXP USA Inc	0.0 $	1000	IC OSC TIMER W/OSC 75MHZ ...
74HCT5555D,112	NXP USA Inc	0.0 $	1000	IC OSC TIMER W/OSC 75MHZ ...