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. 124-2264
Fabrikantnummer74HC595D,112
FabrikantNexperia
€ 0,259
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. 144-9944
FabrikantnummerCD74HC165E
€ 0,488
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 8 HC Through Hole - Serial to Serial/Parallel 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 865-1599
FabrikantnummerHEF4021BT,652
FabrikantNexperia
€ 0,20
Each (In a Tube of 50)
Aantal stuks
SOIC Shift Register 8 HEF Surface Mount - Parallel to Serial 1 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 663-2782
FabrikantnummerSN74LV8154PW
€ 1,046
Each (In a Pack of 5)
Aantal stuks
TSSOP Counter 8 LV Surface Mount Binary Up Counter 2 20 2 V 5.5 V 6.5 x 4.4 x 1.15mm 6.5mm 4.4mm
RS-stocknr. 709-2514
FabrikantnummerSN74LV8154N
€ 0,96
Each (In a Pack of 5)
Aantal stuks
PDIP Counter 16 LV Through Hole Binary Up Counter 2 20 2 V 5.5 V 24.33 x 6.35 x 4.57mm 24.33mm 6.35mm
RS-stocknr. 186-9842
FabrikantnummerMC14526BDWG
FabrikantON Semiconductor
€ 0,715
Each (In a Pack of 10)
Aantal stuks
SOIC Counter 1 - Surface Mount Divide-By-N Down Counter - 16 3 V dc 18 V dc 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 162-6923
FabrikantnummerCD4060BPWR
€ 0,128
Each (On a Reel of 2000)
Aantal stuks
TSSOP Counter, Divider 14 4000 Surface Mount Binary Up Counter 1 16 3 V 18 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS-stocknr. 781-2822
Fabrikantnummer74HC4017D,652
FabrikantNexperia
€ 0,518
Each (In a Pack of 25)
Aantal stuks
SOIC Counter 10 74HC Surface Mount Decade Up Counter 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
RS-stocknr. 145-5812
FabrikantnummerSN74LV8154N
€ 0,82
Each (In a Tube of 20)
Aantal stuks
PDIP Counter 16 LV Through Hole Binary Up Counter 2 20 2 V 5.5 V 24.33 x 6.35 x 4.57mm 24.33mm 6.35mm
RS-stocknr. 145-6407
FabrikantnummerSN74LV8154PW
€ 0,895
Each (In a Tube of 70)
Aantal stuks
TSSOP Counter 8 LV Surface Mount Binary Up Counter 2 20 2 V 5.5 V 6.5 x 4.4 x 1.15mm 6.5mm 4.4mm
RS-stocknr. 663-0092
FabrikantnummerCD74HC165E
€ 0,546
Each (In a Pack of 10)
Aantal stuks
PDIP Shift Register 8 HC Through Hole - Serial to Serial/Parallel 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 169-7807
Fabrikantnummer74HC4094D,652
FabrikantNexperia
€ 2,20
Each
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. 806-3286
FabrikantnummerMC14526BDWR2G
FabrikantON Semiconductor
€ 0,582
Each (On a Tape of 20)
Aantal stuks
SOIC W Counter 3 CMOS Surface Mount Binary Down Counter 1 16 -0.5 V 18 V 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 144-9931
FabrikantnummerCD4024BE
€ 0,376
Each (In a Tube of 25)
Aantal stuks
PDIP Counter, Divider 7 4000 Through Hole Binary Up Counter 1 14 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 186-9084
FabrikantnummerMC14526BDWG
FabrikantON Semiconductor
€ 0,66
Each (In a Tube of 47)
Aantal stuks
SOIC Counter 1 - Surface Mount Divide-By-N Down Counter - 16 3 V dc 18 V dc 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 163-0546
FabrikantnummerMC14526BDWR2G
FabrikantON Semiconductor
€ 0,317
Each (On a Reel of 1000)
Aantal stuks
SOIC W Counter 3 CMOS Surface Mount Binary Down Counter 1 16 -0.5 V 18 V 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 662-9575
FabrikantnummerCD4024BE
€ 0,389
Each (In a Pack of 10)
Aantal stuks
PDIP Counter, Divider 7 4000 Through Hole Binary Up Counter 1 14 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 178-4723
FabrikantnummerMC14094BDG
FabrikantON Semiconductor
€ 0,31
Each (In a Tube of 48)
Aantal stuks
SOIC Shift Register 8 4000 Surface Mount - Serial to Serial/Parallel 1 16 3 V 18 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 145-1056
FabrikantnummerCD4033BE
€ 1,024
Each (In a Tube of 25)
Aantal stuks
PDIP Counter, Divider 5 4000 Through Hole Decade Up Counter 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 178-9163
FabrikantnummerCD74HCT165M96
€ 0,434
Each (In a Tube of 40)
Aantal stuks
SOIC Shift Register 8 HCT Surface Mount - Serial to Serial/Parallel 1 16 4.5 V 5.5 V 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
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