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. 773-7796
Mfr. Part No.MC74HC595ADTR2G
$0.447
Each (In a Pack of 10)
units
TSSOP Shift Register 8 CMOS Surface Mount - Serial to Serial/Parallel 1 16 2 V 6 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm
RS Stock No. 163-0609
Mfr. Part No.MC74HCT4094ADR2G
$0.205
Each (On a Reel of 2500)
units
SOIC Shift Register 8 MC74 Surface Mount - Serial 1 16 4.5 V 5.5 V 10 x 4 x 1.5mm 10mm 4mm
RS Stock No. 145-7566
Mfr. Part No.CD74HC299M96
$0.623
Each (On a Reel of 2000)
units
SOIC Shift Register 8 HC Surface Mount - Serial/Parallel to Serial/Parallel 1 20 2 V 6 V 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm
RS Stock No. 802-1418
Mfr. Part No.74VHC595M
$0.70
Each (In a Tube of 48)
units
SOIC Shift Register 9 VHC Surface Mount - Serial to Parallel 1 16 2 V 5.5 V 9.9 x 3.9 x 1.45mm 9.9mm 3.9mm
RS Stock No. 166-1698
Mfr. Part No.74VHC595MTCX
$0.234
Each (On a Reel of 2500)
units
TSSOP Shift Register 8 74VHC Surface Mount - Serial/Parallel 1 16 2 V 5.5 V 5 x 4.4 x 0.9mm 5mm 4.4mm
RS Stock No. 731-7024
Mfr. Part No.BU4094BCFV-E2
BrandROHM
$2.08
Each (In a Pack of 5)
units
SSOP Shift Register 8 CMOS Surface Mount - Serial/Parallel 1 16 3 V 18 V 5 x 4.4 x 1.05mm 5mm 4.4mm
RS Stock No. 171-3136
Mfr. Part No.74HC595D
BrandToshiba
$0.491
Each (In a Pack of 50)
units
SOIC Shift Register - 74HC Surface Mount - Serial to Parallel 1 16 2 V 6 V 10.2 x 3.9 x 1.38mm 10.2mm 3.9mm
RS Stock No. 165-4195
Mfr. Part No.MIC5841YN
BrandMicrochip
$4.149
Each (In a Tube of 21)
units
PDIP Driver, Shift Register 8 MIC Through Hole - Serial to Serial/Parallel 1 18 - - 23.37 x 6.35 x 3.3mm 23.37mm 6.35mm
RS Stock No. 436-7638
Mfr. Part No.74HC595D,112
BrandNexperia
$0.491
Each (In a Tube of 50)
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. 166-1283
Mfr. Part No.74HC191D,652
BrandNexperia
$0.628
Each (In a Tube of 50)
units
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 Stock No. 145-6222
Mfr. Part No.CD74HC4024PW
$0.442
Each (In a Tube of 90)
units
TSSOP Counter 7 HC Surface Mount Binary - 1 14 2 V 6 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm
RS Stock No. 709-2914
Mfr. Part No.CD74HC597EE4
$1.245
Each (In a Pack of 10)
units
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 Stock No. 662-7128
Mfr. Part No.CD74HC4017PWR
$1.024
Each (In a Pack of 5)
units
TSSOP Counter, Divider 5 HC Surface Mount Decade Up Counter 1 16 2 V 6 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS Stock No. 184-4838
Mfr. Part No.MC74HC165ADTR2G
$0.232
Each (In a Pack of 100)
units
TSSOP Shift Register 8 74HC Surface Mount - Serial/Parallel to Serial 1 16 2 V 6 V 5.1 x 4.5 x 1.2mm 5.1mm 4.5mm
RS Stock No. 145-0756
Mfr. Part No.SN74HC193PW
$0.373
Each (In a Tube of 90)
units
TSSOP Counter 4 HC Surface Mount Binary Down Counter, Up Counter 1 16 2 V 6 V 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm
RS Stock No. 177-3523
Mfr. Part No.HV507PG-G
BrandMicrochip
$19.272
Each (In a Tray of 66)
units
PQFN Shift Register 64 CMOS Surface Mount - Serial to Parallel Converter 18 80 4.5 V 5.5 V 20.2 x 14.2 x 2.9mm 20.2mm 14.2mm
RS Stock No. 145-1120
Mfr. Part No.CD74HC595DW
$0.735
Each (In a Tube of 40)
units
SOIC Shift Register 8 HC Surface Mount - Serial to Parallel 1 16 2 V 6 V 10.5 x 7.6 x 2.35mm 10.5mm 7.6mm
RS Stock No. 807-2432
Mfr. Part No.CD74HC194E
$0.81
Each (In a Pack of 25)
units
PDIP Shift Register 4 74HC Through Hole - Serial/Parallel 1 16 2 V 6 V 19.69 x 6.6 x 4.57mm 19.69mm 6.6mm
RS Stock No. 165-8546
Mfr. Part No.74HCT193D,652
BrandNexperia
$0.48
Each (On a Reel of 1000)
units
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 Stock No. 146-0373
Mfr. Part No.74HC390D,652
BrandNexperia
$0.513
Each (In a Tube of 50)
units
SOIC Counter - 74HC Surface Mount Decade Up Counter 2 16 2 V 6 V 10 x 4 x 1.45mm 10mm 3.9mm
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