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 exampleIn 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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Description Price 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 Stock No. 806-1555
Mfr. Part No.MC74HC4020ADR2G
$0.628
Each (In a Pack of 25)
units
SOIC Counter 14 MC74 Surface Mount Binary Up Counter 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 806-1435
Mfr. Part No.MC74HC161ADG
$0.357
Each (In a Pack of 48)
units
SOIC Counter 4 MC74 Surface Mount Binary Up Counter 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 806-3169
Mfr. Part No.MC14029BDR2G
$0.607
Each (On a Tape of 20)
units
SOIC Counter 4 CMOS Surface Mount Binary, Decade Down Counter, Up Counter 1 16 -0.5 V 18 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 662-7143
Mfr. Part No.CD74HC4060PWR
$0.878
Each (In a Pack of 5)
units
TSSOP Counter 14 HC Surface Mount Binary Up Counter 1 16 2 V 6 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS Stock No. 635-252
Mfr. Part No.CD74HCT4040E
$1.14
Each
units
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 Stock No. 145-7005
Mfr. Part No.CD74HC595MT
$0.991
Each (On a Reel of 250)
units
SOIC Shift Register 8 HC Surface Mount - Serial to Parallel 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 662-9717
Mfr. Part No.CD4520BEE4
$1.112
Each (In a Pack of 5)
units
PDIP Counter 4 4000 Through Hole Binary Up Counter 2 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS Stock No. 806-3270
Mfr. Part No.MC14517BDWR2G
$2.57
Each (In a Pack of 5)
units
SOIC W Shift Register 64 CMOS Surface Mount - Serial 2 16 -0.5 V +18 V 10.45 x 7.6 x 2.4mm 10.45mm 7.6mm
RS Stock No. 709-2453
Mfr. Part No.CD74HC390EE4
$0.976
Each (In a Pack of 10)
units
PDIP Counter, Divider 4 HC Through Hole Decade Up Counter 2 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS Stock No. 178-9179
Mfr. Part No.CD74HC40103M
$2.385
Each (In a Tube of 40)
units
SOIC Counter 8 HC Surface Mount Binary Down Counter 1 16 2 V 6 V 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS Stock No. 145-7576
Mfr. Part No.SN74HC590ADW
$0.553
Each (In a Tube of 40)
units
SOIC Counter 8 HC Surface Mount Binary Up Counter 1 16 2 V 6 V 10.28 x 7.52 x 2.35mm 10.28mm 7.52mm
RS Stock No. 709-2514
Mfr. Part No.SN74LV8154NE4
$1.836
Each (In a Pack of 5)
units
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 Stock No. 145-0195
Mfr. Part No.CD74HCT393EE4
$0.404
Each (In a Tube of 25)
units
PDIP Counter, Divider 4 HCT Through Hole Binary Up Counter 2 14 4.5 V 5.5 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm
RS Stock No. 145-0703
Mfr. Part No.CD74HCT390M
$0.443
Each (In a Tube of 40)
units
SOIC Counter, Divider 4 HCT Surface Mount Decade Up Counter 2 16 4.5 V 5.5 V 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS Stock No. 368-8439
Mfr. Part No.HEF4794BT,112
BrandNexperia
$1.994
Each (In a Tube of 50)
units
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 Stock No. 169-7807
Mfr. Part No.74HC4094D,652
BrandNexperia
$0.72
Each
units
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 Stock No. 162-6950
Mfr. Part No.CD74HC4040M96
$0.374
Each (On a Reel of 2500)
units
SOIC Counter 12 HC Surface Mount Binary Up Counter 1 16 2 V 6 V 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm
RS Stock No. 809-6295
Mfr. Part No.CD74HC595MT
$1.255
Each (In a Pack of 10)
units
SOIC Shift Register 8 HC Surface Mount - Serial to Parallel 1 16 2 V 6 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 186-9019
Mfr. Part No.74VHC595MX
$0.448
Each (On a Reel of 2500)
units
SOIC Shift Register - VHC Surface Mount - Serial to Parallel 1 16 2 V +5.5 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 162-4390
Mfr. Part No.TPIC6595N
$3.795
Each (In a Tube of 20)
units
PDIP Shift Register 8 - Through Hole - Serial to Serial/Parallel 1 20 4.5 V 5.5 V 24.33 x 6.35 x 4.57mm 24.33mm 6.35mm
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