# 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 \$1.00 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 \$0.803 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. 145-0435 Mfr. Part No.CD74HC40103E BrandTexas Instruments Compare \$1.88 Each (In a Tube of 25) units PDIP Counter 8 HC Through Hole Binary Down Counter 1 16 2 V 6 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 \$1.045 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. 663-0294 Mfr. Part No.CD74HC40103E BrandTexas Instruments Compare \$2.22 Each (In a Pack of 5) units PDIP Counter 8 HC Through Hole Binary Down Counter 1 16 2 V 6 V 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm New RS Stock No. 923-6706 Mfr. Part No.CD4060BE BrandTexas Instruments Compare \$0.767 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. 806-1432 Mfr. Part No.MC74HC165ADG BrandON Semiconductor Compare \$0.572 Each (In a Pack of 48) units 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 New RS Stock No. 368-7458 Mfr. Part No.HEF4040BT,652 BrandNexperia Compare \$0.732 Each (In a Tube of 50) units SOIC Counter, Divider 12 4000 Surface Mount Binary Up Counter 1 16 3 V 15 V 10 x 4 x 1.45mm 10mm 4mm New RS Stock No. 146-0381 Mfr. Part No.74HCT4060D,652 BrandNexperia Compare \$1.03 Each (In a Tube of 50) units SOIC Counter 14 74HCT Surface Mount Binary Up Counter 1 16 4.5 V 5.5 V 10 x 4 x 1.45mm 10mm 4mm New RS Stock No. 662-8534 Mfr. Part No.SN74LV595APWR BrandTexas Instruments Compare \$0.726 Each (In a Pack of 5) units TSSOP Shift Register 8 LV Surface Mount - Serial to Serial/Parallel 1 16 2 V 5.5 V 5 x 4.4 x 1.15mm 5mm 4.4mm New RS Stock No. 178-9163 Mfr. Part No.CD74HCT165M96 BrandTexas Instruments Compare \$0.485 Each (In a Tube of 40) units 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 New RS Stock No. 709-2558 Mfr. Part No.SN74LS165AN BrandTexas Instruments Compare \$1.31 Each (In a Pack of 5) units 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 New RS Stock No. 922-2830 Mfr. Part No.SN74LV595APWR BrandTexas Instruments Compare \$0.669 Each (On a Reel of 2000) units TSSOP Shift Register 8 LV Surface Mount - Serial to Serial/Parallel 1 16 2 V 5.5 V 5 x 4.4 x 1.15mm 5mm 4.4mm New RS Stock No. 162-7412 Mfr. Part No.SN74LS165AN BrandTexas Instruments Compare \$1.08 Each (In a Tube of 25) units 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 New RS Stock No. 662-7276 Mfr. Part No.CD74HCT165M96 BrandTexas Instruments Compare \$0.778 Each (In a Pack of 5) units 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 New RS Stock No. 663-2101 Mfr. Part No.SN74HC4040D BrandTexas Instruments Compare \$0.851 Each (In a Pack of 10) 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 New RS Stock No. 540-0304 Mfr. Part No.TC74HC4060AP(F) BrandToshiba Compare \$1.492 Each (In a Pack of 5) units PDIP Counter 14 HC Through Hole Binary Up Counter 1 16 2 V 6 V 19.75 x 6.4 x 3.5mm 19.75mm 6.4mm New RS Stock No. 781-2822 Mfr. Part No.74HC4017D,652 BrandNexperia Compare \$0.779 Each (In a Pack of 25) units SOIC Counter 10 74HC Surface Mount Decade Up Counter 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm New RS Stock No. 527-445 Mfr. Part No.CD4040BE BrandTexas Instruments Compare \$0.694 Each (In a Tube of 25) units 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 New RS Stock No. 146-0374 Mfr. Part No.74HC4017D,652 BrandNexperia Compare \$0.893 Each (In a Tube of 50) units SOIC Counter 10 74HC Surface Mount Decade Up Counter 1 16 2 V 6 V 10 x 4 x 1.45mm 10mm 4mm
Related Products
Texas Instruments range of Counters and Shift Registers ...
Description:
Texas Instruments range of Counters and Shift Registers from the 74LS Family of Low Power Schottky Logic ICs. The 74LS Family use bipolar junction technology coupled with Schottky diode clamps to achieve operating speeds equal to the original 74TTL family ...
Standard logic ICs using CMOS technology to achieve ...
Description:
Standard logic ICs using CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of CMOS integrated circuits. The 74HC4000 logic family is functionally and pin-compatible with the standard LS logic family, and all devices have ...
A range of 74HC Family CMOS Logic Counters ...
Description:
A range of 74HC Family CMOS Logic Counters and Shift Registers from NXP. The 74HC Family use silicon gate CMOS technology to achieve operating speeds similar to the LSTTL family but with the low power consumption of standard CMOS integrated ...
High-Voltage High-Current Source Driver Array. Darlington transistor drivers. ...
Description:
High-Voltage High-Current Source Driver Array. Darlington transistor drivers. Low power CMOS latches. Output transient protection diodes. Ideal for switching high-power loads.