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.

...
Voir plus Voir moins

Filtres

Afficher 1 - 20 des 22 produits
Nombre de résultats par page
Description Prix 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
N° de stock RS 896-2628
Référence fabricant74VHC164FT(BE)
MarqueToshiba
0,242 €
Each (In a Pack of 10)
Unité
TSSOP Shift Register - VHC Surface Mount - - 1 14 2 V 5.5 V 5 x 4.4 x 1mm 5mm 4.4mm
N° de stock RS 171-3445
Référence fabricant74VHC595FT
MarqueToshiba
0,221 €
Each (In a Pack of 50)
Unité
TSSOP Shift Register - 74VHC Surface Mount - Serial to Parallel 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3488
Référence fabricant74VHC4040FT
MarqueToshiba
0,265 €
Each (In a Pack of 25)
Unité
TSSOP Counter 12 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3323
Référence fabricant74VHC161FT
MarqueToshiba
0,117 €
Each (On a Reel of 2500)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3515
Référence fabricant74VHC163FT
MarqueToshiba
0,072 €
Each (In a Pack of 50)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3325
Référence fabricant74VHC164FT
MarqueToshiba
0,079 €
Each (On a Reel of 2500)
Unité
TSSOP Shift Register - 74VHC Surface Mount - Serial to Parallel 1 14 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3455
Référence fabricant74VHC393FT
MarqueToshiba
0,246 €
Each (In a Pack of 25)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 14 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3501
Référence fabricant74VHC161FT
MarqueToshiba
0,085 €
Each (In a Pack of 50)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3326
Référence fabricant74VHC165FT
MarqueToshiba
0,09 €
Each (On a Reel of 2500)
Unité
TSSOP Shift Register - 74VHC Surface Mount - Serial to Parallel 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3342
Référence fabricant74VHC4020FT
MarqueToshiba
0,07 €
Each (On a Reel of 2500)
Unité
TSSOP Counter 14 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3571
Référence fabricant74HC164D
MarqueToshiba
0,25 €
Each (In a Pack of 50)
Unité
SOIC Shift Register - 74HC Surface Mount - Serial to Parallel 1 14 2 V 6 V 8.95 x 3.9 x 1.38mm 8.95mm 3.9mm
N° de stock RS 171-3136
Référence fabricant74HC595D
MarqueToshiba
0,255 €
Each (In a Pack of 50)
Unité
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
N° de stock RS 171-3471
Référence fabricant74VHC4020FT
MarqueToshiba
0,072 €
Each (In a Pack of 25)
Unité
TSSOP Counter 14 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3324
Référence fabricant74VHC163FT
MarqueToshiba
0,07 €
Each (On a Reel of 2500)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3005
Référence fabricant74HC595D
MarqueToshiba
0,097 €
Each (On a Reel of 2500)
Unité
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
N° de stock RS 171-3384
Référence fabricant74HC164D
MarqueToshiba
0,091 €
Each (On a Reel of 2500)
Unité
SOIC Shift Register - 74HC Surface Mount - Serial to Parallel 1 14 2 V 6 V 8.95 x 3.9 x 1.38mm 8.95mm 3.9mm
N° de stock RS 171-3343
Référence fabricant74VHC4040FT
MarqueToshiba
0,097 €
Each (On a Reel of 2500)
Unité
TSSOP Counter 12 74VHC Surface Mount Binary - 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3351
Référence fabricant74VHC595FT
MarqueToshiba
0,081 €
Each (On a Reel of 2500)
Unité
TSSOP Shift Register - 74VHC Surface Mount - Serial to Parallel 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3341
Référence fabricant74VHC393FT
MarqueToshiba
0,085 €
Each (On a Reel of 2500)
Unité
TSSOP Counter - 74VHC Surface Mount Binary - 1 14 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm
N° de stock RS 171-3548
Référence fabricant74VHC165FT
MarqueToshiba
0,221 €
Each (In a Pack of 50)
Unité
TSSOP Shift Register - 74VHC Surface Mount - Serial to Parallel 1 16 2 V 5.5 V 5.02 x 4.4 x 1mm 5.02mm 4.4mm