7083N/84N-121206-3

The information included herein is believed to be

accurate and reliable. However, LSI Computer Systems,

Inc. assumes no responsibilities for inaccuracies, nor for

any infringements of patent rights of others which may

result from its use.

CLOCK

AND

DIRECTION

DECODE

DUAL

ONE-SHOT

DUAL

ONE-SHOT

CURRENT

MIRROR

FILTER

FILTER

A

B

MODE

MUX

x4 CLOCK

x1 CLOCK

UP/DN

8

7

UPCK or CLK

DNCK or UP/DN

1

4

5

6

2

3

FIGURE 3. LS7083N/LS7084N BLOCK DIAGRAM

RBIAS

+V

-V

x2 CLOCK

FORWARD

REVERSE

2

4

1

4

2

2

4

1

4

2

2

4

1

4

2

2

4

1

4

2

A

B

UPCLK

(7083N)

DNCLK

(7083N)

CLK

(7084N)

UP/DN

(7084N)

NOTE: Output clocks labeled 1, 2 and 4 have the following interpretations.

1. Generated in x1, x2 and x4 modes.

2. Generated in x2 and x4 modes only.

3. Generated in x4 mode only.

FIGURE 2. LS7083N / LS7084N INPUT / OUTPUT TIMING