# 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.

...
602

#### Filters

Viewing 1 - 20 of 602 products
Results per page
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
 New RS Stock No. 217-5695 Mfr. Part No.SN74HC595N BrandTexas Instruments Compare £0.45 Each Units 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 New RS Stock No. 100-0763 Mfr. Part No.SN74HC595N BrandTexas Instruments Compare £0.354 Each (In a Tube of 25) Units 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 New RS Stock No. 732-0691 Mfr. Part No.CD4017BE BrandTexas Instruments Compare £0.404 Each (In a Pack of 5) Units PDIP Counter, Divider 5 CMOS Through Hole Decade Up Counter 1 16 3 V 18 V 19.69 x 6.6 x 4.57mm 19.69mm 6.6mm New RS Stock No. 921-5166 Mfr. Part No.CD4017BE BrandTexas Instruments Compare £0.326 Each (In a Tube of 25) Units PDIP Counter, Divider 5 CMOS Through Hole Decade Up Counter 1 16 3 V 18 V 19.69 x 6.6 x 4.57mm 19.69mm 6.6mm New RS Stock No. 923-6706 Mfr. Part No.CD4060BE BrandTexas Instruments Compare £0.326 Each (In a Tube of 25) Units PDIP Counter, Divider 14 4000 Through Hole Binary Up Counter 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 709-1974 Mfr. Part No.CD4060BE BrandTexas Instruments Compare £0.326 Each (In a Pack of 10) Units PDIP Counter, Divider 14 4000 Through Hole Binary Up Counter 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 144-9934 Mfr. Part No.CD4026BE BrandTexas Instruments Compare £0.313 Each (In a Tube of 25) Units 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 New RS Stock No. 662-9590 Mfr. Part No.CD4026BE BrandTexas Instruments Compare £0.313 Each (In a Pack of 10) Units 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 New RS Stock No. 170-7981 Mfr. Part No.74HCT595D,118 BrandNexperia Compare £0.186 Each (On a Reel of 2500) Units SO - 8 74HCT Surface Mount - Serial to Serial/Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm New RS Stock No. 436-7767 Mfr. Part No.74HCT595D,112 BrandNexperia Compare £0.364 Each (In a Tube of 50) Units SOIC Shift Register 8 HCT Surface Mount - Serial to Serial/Parallel 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm New RS Stock No. 144-9930 Mfr. Part No.CD4021BEE4 BrandTexas Instruments Compare £0.311 Each (In a Tube of 25) Units PDIP Shift Register 8 4000 Through Hole - Serial/Parallel to Serial 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 662-9565 Mfr. Part No.CD4021BEE4 BrandTexas Instruments Compare £0.388 Each (In a Pack of 5) Units PDIP Shift Register 8 4000 Through Hole - Serial/Parallel to Serial 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 145-0195 Mfr. Part No.CD74HCT393EE4 BrandTexas Instruments Compare £0.254 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 New RS Stock No. 709-2258 Mfr. Part No.CD74HCT393EE4 BrandTexas Instruments Compare £0.499 Each (In a Pack of 10) 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 New RS Stock No. 144-9896 Mfr. Part No.SN74LS393N BrandTexas Instruments Compare £0.762 Each (In a Tube of 25) Units PDIP Counter, Divider 4 LS Through Hole Binary Up Counter 2 14 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 526-717 Mfr. Part No.CD4094BE BrandTexas Instruments Compare £0.313 Each (In a Tube of 25) Units PDIP Shift Register 8 4000 Through Hole - Serial to Serial/Parallel 1 16 3 V 18 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 304-863 Mfr. Part No.SN74LS393N BrandTexas Instruments Compare £0.89 Each Units PDIP Counter, Divider 4 LS Through Hole Binary Up Counter 2 14 4.75 V 5.25 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 527-423 Mfr. Part No.SN74HC594N BrandTexas Instruments Compare £0.516 Each (In a Pack of 5) 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 New RS Stock No. 121-8425 Mfr. Part No.SN74HC594N BrandTexas Instruments Compare £0.422 Each (In a Tube of 25) 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 New RS Stock No. 333-2978 Mfr. Part No.SN74HC165N BrandTexas Instruments Compare £0.287 Each (In a Tube of 25) Units 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
Related Products
Texas Instruments range of Counters & Shift Registers ...
Description:
Texas Instruments range of Counters & Shift Registers from the 4000 Series CMOS Logic Family. CMOS Family devices Wide operating voltage range: 3 to 18V. 4000 Series Counters & Shift Registers, Texas Instruments. 4000 CMOS Logic Family, Texas Instruments.
Texas Instruments range of Counters & Shift Registers ...
Description:
Texas Instruments range of Counters & Shift Registers from the 4000 Series CMOS Logic Family. CMOS Family devices Wide operating voltage range: 3 to 18V. 4000 Series Counters & Shift Registers, Texas Instruments. 4000 CMOS Logic Family, Texas Instruments.
Low-Voltage CMOS logic Operating Voltage: 2 to 5.5Compatibility: ...
Description:
Low-Voltage CMOS logic Operating Voltage: 2 to 5.5Compatibility: Input LVTTL/TTL, Output LVCMOS. 74LV Family, Texas Instruments. 74LV Family.
Texas Instruments Complex Function ICs from the 4000 ...
Description:
Texas Instruments Complex Function ICs from the 4000 Series CMOS Logic Family includes 7-segment LCD Latch/Decoder/Drivers, Magnitude Comparators and Phase Locked Loop (PLL) ICs. CMOS Family devices Wide operating voltage range: 3 to 18V. 4000 Series Complex Function, Texas Instruments. 4000 CMOS Logic Family, Texas Instruments.