2

PS8542A

01/30-06

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PI6C2952

Low Voltage PLL Clock Driver

fsela

(Int Pull Down)

(Int Pull Down)

(Int Pull Down)

fselb

(Int Pull Down)

fselc

(Int Pull Down)

MR/OE

(Int Pull Down)

VCO_Sel

PLL_En

FBIn

REFCLK

VCO

200-480MHz

Qa4

Qa3

Qa2

Qa1

Qa0

Qb3

Qb2

Qb1

Qb0

Qc1

Qc0

÷2

"–1" Has ÷2/÷8

"–2" Has ÷4/÷8

÷4/÷2

÷4/÷6

Phase

Detector

LPF

÷2/÷4

Function Tables

a

l

e

s

fn

a

Qb

l

e

s

fn

b

Qc

l

e

s

fn

c

Q

0

1

4

÷

6

÷

0

1

4

÷

2

÷

0

1

2

÷

4

÷

n

i

P

l

o

r

t

n

o

C'

O

'

c

i

g

o

L'

1

'

c

i

g

o

L

l

e

S

_

O

C

VO

C

V

f2

/

O

C

V

f

E

O

/

R

Me

l

b

a

n

E

t

u

p

t

u

OZ

h

g

i

H

n

E

_

L

L

PL

L

P

e

l

b

a

n

EL

L

P

e

l

b

a

s

i

D

e

m

a

N

n

i

Pn

o

i

t

p

i

r

c

s

e

D

A

C

C

Vy

l

p

p

u

S

r

e

w

o

P

L

L

P

O

C

C

Vy

l

p

p

u

S

r

e

w

o

P

r

e

f

f

u

B

t

u

p

t

u

O

I

C

C

Vy

l

p

p

u

S

r

e

w

o

P

c

i

g

o

L

e

r

o

C

l

a

n

r

e

t

n

I

I

D

N

Gd

n

u

o

r

G

l

a

n

r

e

t

n

I

O

D

N

Gd

n

u

o

r

G

r

e

f

f

u

B

t

u

p

t

u

O

Block Diagram