Counter ICs

A Shift Register is a sequential logic device made up of a cascade of flip-flops, through which a sequence of bits are ’shifted’. These devices are commonly used to convert between serial and parallel interfaces.

How it works – basic example

In a Shift Register the output of each flip-flop is connected to the input of the next flip-flop in the cascade. With each cycle of the connected clock, the bits are ’shifted’ down the cascade by one flip-flop.

A simple analogy to understand the basic theory or operation would be to consider a glass tube with an opening both ends, and placing a ball marked ’0’ or ’1’ into one end of the tube at a regular intervals.

As each ball is placed into the tube, all the balls are ’shifted’ along by one position. The sequence in which the balls marked ’0’ and ’1’ where fed in is preserved. Also each time one ball is fed in, the ball that has been in the cascade the longest drops out. So if the tube can contain 4 balls at any one time, this could be described as a 4-bit Shift Register.

Common Types of Shift Register

• Serial-in serial-out (SISO) – In this type of Shift Register, the data input and output is serial. With each clock cycle a new bit is fed into the cascade, with the bit furthest along the cascade exiting as an output. So in a 4-bit register, the output trails the input by 4 clock cycles. This matches the simple example above, with the ball that exits the tube being the output.

• Serial-in parallel-out (SIPO) – In this configuration data is converted from serial into parallel format. As described for the SISO variant above, data is fed in serially and shifted down the cascade, the difference is that each flip-flop has an output, allowing the entire bit array to be output simultaneously as a parallel output. This may be done using a latched of buffered output.

• Parallel-in serial-out (PISO) – This variant takes a parallel input and converts into a serial output. To do this the shift register must implement a write/shift sequence. The parallel data input is (written) into each flip-flop of the array simultaneously in one clock cycle, then for the next cycles the register goes into shift mode as the bits are shifted down the flip-flop cascade, being output as serial data. The process then repeats.

• Parallel-in parallel-out (PIPO) – This type of register differs slightly from the others in that inputs and outputs of each flip-flop in the array are not interconnected. Each flip-flop takes one bit of the parallel input, stores it for a cycle, and then outputs the data simultaneously with the other flip-flops in the register, creating a parallel output that matches the input. Like the SISO type above, PIPO variants can be used to temporarily store data, or act a time delay device.

• Universal Shift Register – A configurable Shift Register that can be programmed to act as a SISO, SIPO, PISO or PIPO device, often on the fly.

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Omschrijving Prijs Package Type Logic Function Number of Stages Logic Family Mounting Type Counter Type Operation Mode Number of Elements Pin Count Minimum Operating Supply Voltage Maximum Operating Supply Voltage Dimensions Length Width
RS-stocknr. 483-6522
Fabrikantnummer74HC4024D,652
FabrikantNexperia
0,455 €
Each (In a Pack of 10)
Aantal stuks
SOIC Counter 7 HC Surface Mount Binary Up Counter 1 14 2 V 6 V 8.75 x 4 x 1.45mm 8.75mm 4mm
RS-stocknr. 178-6999
Fabrikantnummer74HC4024D,652
FabrikantNexperia
0,455 €
Each (In a Tube of 57)
Aantal stuks
SOIC Counter 7 HC Surface Mount Binary Up Counter 1 14 2 V 6 V 8.75 x 4 x 1.45mm 8.75mm 4mm
RS-stocknr. 436-7638
Fabrikantnummer74HC595D,112
FabrikantNexperia
0,203 €
Each (In a Tube of 50)
Aantal stuks
SOIC Shift Register 8 HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 368-7874
FabrikantnummerHEF4094BT,652
FabrikantNexperia
0,304 €
Each (In a Tube of 50)
Aantal stuks
SOIC Shift Register 8 4000 Surface Mount - Serial to Serial/Parallel 1 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 170-7956
Fabrikantnummer74HC595D,118
FabrikantNexperia
0,075 €
Each (On a Reel of 2500)
Aantal stuks
SO - 8 74HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 170-7972
FabrikantnummerHEF4094BT,653
FabrikantNexperia
0,092 €
Each (On a Reel of 2500)
Aantal stuks
SO - 8 HEF Surface Mount - - 1 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 146-0381
Fabrikantnummer74HCT4060D,652
FabrikantNexperia
0,49 €
Each (In a Tube of 50)
Aantal stuks
SOIC Counter 14 74HCT Surface Mount Binary Up Counter 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 813-9314
Fabrikantnummer74HC4060BQ,115
FabrikantNexperia
0,088 €
Each (On a Tape of 25)
Aantal stuks
DHVQFN Counter - HC Surface Mount - - 1 16 2 V 6 V 3.6 x 2.6 x 0.95mm 3.6mm 2.6mm
RS-stocknr. 170-7981
Fabrikantnummer74HCT595D,118
FabrikantNexperia
0,206 €
Each (On a Reel of 2500)
Aantal stuks
SO - 8 74HCT Surface Mount - Serial to Serial/Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 816-4650
Fabrikantnummer74HCT193D,652
FabrikantNexperia
0,61 €
Each (In a Pack of 25)
Aantal stuks
SOIC Counter 4 74HCT Surface Mount Binary Down Counter, Up Counter 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 483-6667
Fabrikantnummer74HC597D,652
FabrikantNexperia
0,367 €
Each (In a Pack of 10)
Aantal stuks
SOIC Shift Register 8 HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 483-6465
Fabrikantnummer74HC191D,652
FabrikantNexperia
0,41 €
Each (In a Pack of 10)
Aantal stuks
SOIC Counter 4 HC Surface Mount Binary Down Counter, Up Counter 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 781-2894
Fabrikantnummer74HCT4060D,652
FabrikantNexperia
0,306 €
Each (In a Pack of 25)
Aantal stuks
SOIC Counter 14 74HCT Surface Mount Binary Up Counter 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 166-1283
Fabrikantnummer74HC191D,652
FabrikantNexperia
0,41 €
Each (In a Tube of 50)
Aantal stuks
SOIC Counter 4 HC Surface Mount Binary Down Counter, Up Counter 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 165-9949
Fabrikantnummer74HC4060BQ,115
FabrikantNexperia
0,087 €
Each (On a Reel of 3000)
Aantal stuks
DHVQFN Counter - HC Surface Mount - - 1 16 2 V 6 V 3.6 x 2.6 x 0.95mm 3.6mm 2.6mm
RS-stocknr. 165-8546
Fabrikantnummer74HCT193D,652
FabrikantNexperia
0,315 €
Each (On a Reel of 1000)
Aantal stuks
SOIC Counter 4 74HCT Surface Mount Binary Down Counter, Up Counter 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 483-7963
FabrikantnummerHEF4520BT,652
FabrikantNexperia
0,387 €
Each (In a Pack of 20)
Aantal stuks
SOIC Counter 4 4000 Surface Mount Binary Up Counter 2 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 166-1285
FabrikantnummerHEF4520BT,652
FabrikantNexperia
0,387 €
Each (In a Tube of 50)
Aantal stuks
SOIC Counter 4 4000 Surface Mount Binary Up Counter 2 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 436-7767
Fabrikantnummer74HCT595D,112
FabrikantNexperia
0,404 €
Each (In a Tube of 50)
Aantal stuks
SOIC Shift Register 8 HCT Surface Mount - Serial to Serial/Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 170-4858
Fabrikantnummer74HC4094PW,118
FabrikantNexperia
0,129 €
Each (On a Reel of 2500)
Aantal stuks
TSSOP Shift Register 8 74HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm