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. 162-7412
FabrikantnummerSN74LS165AN
€ 0,53
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 8 LS Through Hole - Serial to Serial/Parallel 1 16 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 922-2962
FabrikantnummerTPIC6A595DW
€ 2,516
Each (In a Tube of 25)
Aantal stuks
SOIC Shift Register 8 - Surface Mount - Serial to Serial/Parallel 1 24 4.5 V 5.5 V 15.4 x 7.52 x 2.35mm 15.4mm 7.52mm
RS-stocknr. 923-3732
FabrikantnummerTPIC6595DWR
€ 1,334
Each (On a Reel of 2000)
Aantal stuks
SOIC Shift Register 8 - Surface Mount - Serial to Serial/Parallel 1 20 4.5 V 5.5 V 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm
RS-stocknr. 163-2475
FabrikantnummerMC74HC595ADR2G
FabrikantON Semiconductor
€ 0,093
Each (On a Reel of 2500)
Aantal stuks
SOIC Shift Register 8 HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 163-0552
FabrikantnummerMC14569BDWR2G
FabrikantON Semiconductor
€ 1,102
Each (On a Reel of 1000)
Aantal stuks
SOIC W Counter 4 CMOS Surface Mount Divide-By-N Serial/Parallel 2 16 -0.5 V 18 V 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 662-6838
FabrikantnummerCD4015BPWR
€ 0,388
Each (In a Pack of 5)
Aantal stuks
TSSOP Shift Register 4 4000 Surface Mount - Serial to Parallel 2 16 3 V 18 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS-stocknr. 806-3144
FabrikantnummerMC14020BDG
FabrikantON Semiconductor
€ 0,442
Each (In a Pack of 25)
Aantal stuks
SOIC Counter 14 CMOS Surface Mount Binary Up Counter 1 16 -0.5 V 18 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 527-205
FabrikantnummerTPIC6595DW
€ 2,81
Each (In a Pack of 5)
Aantal stuks
SOIC Shift Register 8 - Surface Mount - Serial to Serial/Parallel 1 20 4.5 V 5.5 V 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm
RS-stocknr. 806-3324
FabrikantnummerMC14569BDWG
FabrikantON Semiconductor
€ 1,914
Each (In a Pack of 5)
Aantal stuks
SOIC W Counter 4 CMOS Surface Mount Divide-By-N Serial/Parallel 2 16 -0.5 V 18 V 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS-stocknr. 436-7638
Fabrikantnummer74HC595D,112
FabrikantNexperia
€ 0,285
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. 162-4293
FabrikantnummerSN74LS164N
€ 0,428
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 8 LS Through Hole - Serial to Parallel 1 14 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 145-0389
FabrikantnummerSN74HC594D
€ 0,50
Each (In a Tube of 40)
Aantal stuks
SOIC Shift Register 8 HC Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS-stocknr. 162-7240
FabrikantnummerCD4031BE
€ 0,964
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 64 4000 Through Hole - Serial to Serial 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 662-7276
FabrikantnummerCD74HCT165M96
€ 0,10
Each (In a Pack of 5)
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
RS-stocknr. 662-8130
FabrikantnummerSN74HC166DR
€ 0,28
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 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS-stocknr. 165-9891
Fabrikantnummer74HC165PW,112
FabrikantNexperia
€ 0,267
Each (In a Tube of 96)
Aantal stuks
TSSOP Shift Register 8 74HC Surface Mount - Parallel to Serial 1 16 2 V 6 V 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm
RS-stocknr. 709-2031
FabrikantnummerCD4029BE
€ 0,41
Each (In a Pack of 10)
Aantal stuks
PDIP Counter 4 4000 Through Hole Binary, Decade Down Counter, Up Counter 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 663-1984
FabrikantnummerSN74HC165PW
€ 0,443
Each (In a Pack of 10)
Aantal stuks
TSSOP Shift Register 8 HC Surface Mount - Parallel to Serial 1 16 2 V 6 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS-stocknr. 305-018
FabrikantnummerSN74LS164N
€ 0,52
Each
Aantal stuks
PDIP Shift Register 8 LS Through Hole - Serial to Parallel 1 14 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 100-0742
FabrikantnummerSN74LS590N
€ 7,57
Each (In a Tube of 25)
Aantal stuks
PDIP Counter 8 LS Through Hole Binary Up Counter 1 16 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
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