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. 100-0763
FabrikantnummerSN74HC595N
€ 0,388
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 8 HC Through Hole - Serial to Parallel 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 145-7567
FabrikantnummerSN74AHC594PWR
€ 0,162
Each (On a Reel of 2000)
Aantal stuks
TSSOP Shift Register 8 AHC Surface Mount - Serial to Serial/Parallel 1 16 2 V 5.5 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS-stocknr. 527-445
FabrikantnummerCD4040BE
€ 0,388
Each (In a Tube of 25)
Aantal stuks
PDIP Counter, Divider 12 4000 Through Hole Binary Up Counter 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 526-757
FabrikantnummerSN74HC595D
€ 0,421
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. 527-520
FabrikantnummerSN74HC595DR
€ 0,353
Each (In a Pack of 25)
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. 121-8427
FabrikantnummerSN74HC595DR
€ 0,14
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 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS-stocknr. 809-5829
FabrikantnummerSN74HC595DT
€ 0,659
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 1.5mm 10mm 4mm
RS-stocknr. 145-0001
FabrikantnummerSN74HC4040NE4
€ 0,421
Each (In a Tube of 25)
Aantal stuks
PDIP Counter 12 HC Through Hole Binary Up Counter 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 122-2837
Fabrikantnummer74HCT595S16-13
FabrikantDiodesZetex
€ 0,131
Each (On a Reel of 2500)
Aantal stuks
SOIC Shift Register 8 HCT Surface Mount Octal Serial to Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 443-104
FabrikantnummerSN74HC166N
€ 2,22
Each
Aantal stuks
PDIP Shift Register 8 HC Through Hole - Parallel to Serial, Serial 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 709-2069
FabrikantnummerSN74HC4040NE4
€ 0,463
Each (In a Pack of 10)
Aantal stuks
PDIP Counter 12 HC Through Hole Binary Up Counter 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 798-9092
Fabrikantnummer74HCT595S16-13
FabrikantDiodesZetex
€ 0,25
Each (In a Pack of 25)
Aantal stuks
SOIC Shift Register 8 HCT Surface Mount - Serial to Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 333-2978
FabrikantnummerSN74HC165N
€ 0,356
Each (In a Tube of 25)
Aantal stuks
PDIP Shift Register 8 HC Through Hole - Parallel to Serial Converter 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 333-2984
FabrikantnummerSN74HC166N
€ 0,361
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. 635-252
FabrikantnummerCD74HCT4040E
€ 2,22
Each
Aantal stuks
PDIP Counter 12 HCT Through Hole Binary Up Counter 1 16 4.5 V 5.5 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 662-9590
FabrikantnummerCD4026BE
€ 0,427
Each (In a Pack of 10)
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. 806-1432
FabrikantnummerMC74HC165ADG
FabrikantON Semiconductor
€ 0,313
Each (In a Pack of 48)
Aantal stuks
SOIC Shift Register 8 MC74 Surface Mount - Serial/Parallel to Serial 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 121-6509
FabrikantnummerMC74HC165ADR2G
FabrikantON Semiconductor
€ 0,127
Each (On a Reel of 2500)
Aantal stuks
SOIC Shift Register 8 HC Surface Mount - Parallel to Serial, Serial 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS-stocknr. 145-1015
FabrikantnummerCD74HCT4040E
€ 0,496
Each (In a Tube of 25)
Aantal stuks
PDIP Counter 12 HCT Through Hole Binary Up Counter 1 16 4.5 V 5.5 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS-stocknr. 662-9890
FabrikantnummerCD74ACT164M
€ 0,83
Each (In a Pack of 5)
Aantal stuks
SOIC Shift Register 8 ACT Surface Mount - Serial to Parallel 1 14 4.5 V 5.5 V 8.65 x 3.91 x 1.58mm 8.65mm 3.91mm
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