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.

...
Read more Read less

Filters

Viewing 1 - 20 of 689 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
RS Stock No. 100-0763
Mfr. Part No.SN74HC595N
$0.645
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
RS Stock No. 709-1974
Mfr. Part No.CD4060BEE4
$0.782
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
RS Stock No. 663-0294
Mfr. Part No.CD74HC40103E
$1.436
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
RS Stock No. 145-0435
Mfr. Part No.CD74HC40103E
$1.104
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
RS Stock No. 923-6706
Mfr. Part No.CD4060BEE4
$0.406
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
RS Stock No. 368-7458
Mfr. Part No.HEF4040BT,652
BrandNexperia
$0.554
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
RS Stock No. 808-0091
Mfr. Part No.MC74HC165ADR2G
$0.217
Each (In a Pack of 200)
units
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 Stock No. 806-1432
Mfr. Part No.MC74HC165ADG
$0.587
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
RS Stock No. 121-6509
Mfr. Part No.MC74HC165ADR2G
$0.171
Each (On a Reel of 2500)
units
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 Stock No. 146-0381
Mfr. Part No.74HCT4060D,652
BrandNexperia
$0.298
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
RS Stock No. 709-2558
Mfr. Part No.SN74LS165ANE4
$1.14
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
RS Stock No. 662-7276
Mfr. Part No.CD74HCT165M96
$0.844
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
RS Stock No. 178-9163
Mfr. Part No.CD74HCT165M96
$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
RS Stock No. 162-7412
Mfr. Part No.SN74LS165ANE4
$0.74
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
RS Stock No. 540-0304
Mfr. Part No.TC74HC4060AP(F)
BrandToshiba
$2.588
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
RS Stock No. 162-6923
Mfr. Part No.CD4060BPWR
$0.226
Each (On a Reel of 2000)
units
TSSOP Counter, Divider 14 4000 Surface Mount Binary Up Counter 1 16 3 V 18 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS Stock No. 781-2822
Mfr. Part No.74HC4017D,652
BrandNexperia
$0.502
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
RS Stock No. 527-445
Mfr. Part No.CD4040BE
$0.657
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
RS Stock No. 662-6850
Mfr. Part No.CD4060BPWR
$0.527
Each (In a Pack of 10)
units
TSSOP Counter, Divider 14 4000 Surface Mount Binary Up Counter 1 16 3 V 18 V 5 x 4.4 x 1.15mm 5mm 4.4mm
RS Stock No. 178-6973
Mfr. Part No.74HC40103D,652
BrandNexperia
$1.474
Each (In a Tube of 50)
units
SOIC Counter 8 HC Surface Mount Binary Down 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 74HC Family of CMOS Logic ICs. The 74HC Family use silicon gate CMOS technology to achieve operating speeds similar to the LSTTL family but with the low power consumption of ...