74F676_02 datasheet(2/6 Pages) FAIRCHILD

Il numero della parte	74F676

Spiegazioni elettronici	16-Bit Serial/Parallel-In, Serial-Out Shift Register

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Produttore elettronici	FAIRCHILD [Fairchild Semiconductor]

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Functional Description

The 16-bit shift register operates in one of three modes, as

indicated in the Shift Register Operations Table.

HOLD— a HIGH signal on the Chip Select (CS) input pre-

vents clocking, and data is stored in the sixteen registers.

Shift/Serial Load— data present on the SI pin shifts into

the register on the falling edge of CP. Data enters the Q0

position and shifts toward Q15 on successive clocks, finally

appearing on the SO pin.

Parallel Load— data present on P0–P15 are entered into

the register on the falling edge of CP. The SO output repre-

sents the Q15 register output.

To prevent false clocking, CP must be LOW during a

LOW-to-HIGH transition of CS.

Shift Register Operations Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

X

= Immaterial

= HIGH-to-LOW Transition

Block Diagram

Pin Names

Description

U.L.

Input IIH/IIL

HIGH/LOW

Output IOH/IOL

P0–P15

Parallel Data Inputs

1.0/1.0

20

µA/−0.6 mA

CS

Chip Select Input (Active LOW)

1.0/1.0

20

µA/−0.6 mA

CP

Clock Pulse Input (Active LOW)

1.0/1.0

20

µA/−0.6 mA

M

Mode Select Input

1.0/1.0

20

µA/−0.6 mA

SI

Serial Data Input

1.0/1.0

20

µA/−0.6 mA

SO

Serial Output

50/33.3

−1 mA/20 mA

Control Input

Operating Mode

CS

MCP

HX

X

Hold

LL

Shift/Serial Load

LH

Parallel Load

Codice articolo simile - 74F676_02

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
National Semiconductor ...	74F676PC	181Kb / 10P	16-Bit Serial/Parallel-In, Serial-Out Shift Register
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National Semiconductor ...	74F676SC	181Kb / 10P	16-Bit Serial/Parallel-In, Serial-Out Shift Register
National Semiconductor ...	74F676SC	181Kb / 10P	16-Bit Serial/Parallel-In, Serial-Out Shift Register
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Descrizione simile - 74F676_02

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
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