MC74HC589 Motorola, MC74HC589 Datasheet - Page 4

MC74HC589

Manufacturer Part Number

MC74HC589

Description

8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output

Manufacturer

Motorola

Datasheet

1.MC74HC589.pdf (10 pages)

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MOTOROLA

NOTE: Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).

LR = latch register contents

SR = shift register contents

a–h = data at parallel data inputs A–H

D = data (L, H) at serial data input S A

TIMING REQUIREMENTS

MC54/74HC589

Force output into high

impedance state

Load parallel data into

data latch

Transfer latch contents to

shift register

Contents of input latch

and shift register are

unchanged

Load parallel data into

data latch and shift

Shift serial data into shift

Load parallel data in data

latch and shift serial data

into shift register

Symbol

t r , t f

t su

t w

t h

Operation

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

Minimum Setup Time, A–H to Latch Clock

Minimum Setup Time, Serial Data Input S A to Shift Clock

Minimum Setup Time, Serial Shift/Parallel Load to Shift Clock

Minimum Hold Time, Latch Clock to A–H

Minimum Hold Time, Shift Clock to Serial Data Input S A

Minimum Pulse Width, Shift Clock

Minimum Pulse Width, Latch Clock

Minimum Pulse Width, Serial Shift/Parallel Load

Maximum Input Rise and Fall Times

(Figure 5)

(Figure 6)

(Figure 7)

(Figure 5)

(Figure 6)

(Figure 2)

(Figure 1)

(Figure 4)

(Figure 1)

Output

Enable

(Input t r = t f = 6 ns)

Parallel Load

Serial Shift/

Parameter

L, H,

Latch

Clock

Inputs

FUNCTION TABLE

L, H,

Clock

Shift

3–4

U = remains unchanged

X = don’t care

Z = high impedance

* = depends on Latch Clock input

Serial

Input

S A

Î Î Î Î

Parallel

Inputs

V CC

A–H

a–h

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

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Contents

– 55 to

25 _ C

1000

Latch

100

500

400

Data

a–h

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Guaranteed Limit

Resulting Function

SR N

1000

LR N

High–Speed CMOS Logic Data

125

100

500

400

85 _ C

Contents

SR A = D,

Shift

a–h

Î Î Î Î

SR N+1

SR N

1000

125 _ C

150

120

500

400

DL129 — Rev 6

SR G

Î Î Î

Output

LR H

Q H

Unit

SR H

MC74HC589 Motorola, MC74HC589 Datasheet - Page 4

MC74HC589

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