2

ICS9250-28

The ICS9250-28 is part of a two chip clock solution for 810/810E and 815 type chipset. Combined with the

ICS9112-17, the ICS9250-28 provides all necessary clock signals for such a system.

Spread spectrum may be enabled through I

2C programming. Spread spectrum typically reduces EMI by 8dB to 10

dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The

ICS9250-28 employs a proprietary closed loop design, which tightly controls the percentage of spreading over

process and temperature variations.

General Description

Pin Configuration

R

E

B

M

U

N

N

I

PE

M

A

N

N

I

PE

P

Y

TN

O

I

T

P

I

R

C

S

E

D

1C

I

P

A

O

IT

U

O.

z

H

M

3

.

3

3

t

a

g

n

i

n

n

u

r

t

u

p

t

u

o

k

c

o

l

c

V

5

.

2

6

5

,

2L

D

D

VR

W

PC

I

P

A

O

I

&

U

P

C

r

o

f

y

l

p

p

u

s

r

e

w

o

p

V

5

.

2

4

1

S

FN

Iy

t

i

l

a

n

o

i

t

c

n

u

f

t

u

p

t

u

o

l

l

a

,

y

c

n

e

u

q

e

r

f

U

P

C

s

e

n

i

m

r

e

t

e

D

.

n

i

p

t

c

e

l

e

S

n

o

i

t

c

n

u

F

0

F

E

RT

U

O.

t

u

p

t

u

o

k

c

o

l

c

e

c

n

e

r

e

f

e

r

z

H

M

8

1

3

.

4

1

,

V

3

.

3

,

5

2

,

0

2

,

4

1

,

9

,

5

9

4

,

4

4

,

0

4

,

5

3

,

1

3

D

D

VR

W

Py

l

p

p

u

s

r

e

w

o

p

V

3

.

3

61

XN

I

k

c

a

b

d

e

e

f

d

n

a

)

F

p

3

3

(

p

a

c

d

a

o

l

l

a

n

r

e

t

n

i

s

a

h

,

t

u

p

n

i

l

a

t

s

y

r

C

2

X

m

o

r

f

r

o

t

s

i

s

e

r

72

XT

U

O

d

a

o

l

l

a

n

r

e

t

n

i

s

a

H

.

z

H

M

8

1

3

.

4

1

y

l

l

a

n

i

m

o

n

,

t

u

p

t

u

o

l

a

t

s

y

r

C

)

F

p

3

3

(

p

a

c

,

9

1

,

7

1

,

3

1

,

8

,

3

,

9

3

,

4

3

,

0

3

,

4

2

5

5

,

2

5

,

8

4

,

3

4

D

N

GR

W

Py

l

p

p

u

s

V

3

.

3

r

o

f

s

n

i

p

d

n

u

o

r

G

0

1

,

1

1

,

2

1)

0

:

2

(

6

6

V

3T

U

OB

U

H

r

o

f

s

t

u

p

t

u

o

k

c

o

l

c

z

H

M

6

6

d

e

x

i

F

V

3

.

3

8

1

,

8

2)

0

,

2

(

S

FN

I

.

y

t

i

l

a

n

o

i

t

c

n

u

f

t

u

p

t

u

o

l

l

a

,

y

c

n

e

u

q

e

r

f

U

P

C

s

e

n

i

m

r

e

t

e

D

.

s

n

i

p

t

c

e

l

e

S

n

o

i

t

c

n

u

F

.

3

e

g

a

p

n

o

e

l

b

a

t

y

t

i

l

a

n

o

i

t

c

n

u

F

o

t

r

e

f

e

r

e

s

a

e

l

P

5

1

,

6

1]

0

:

1

[

K

L

C

I

C

PT

U

Os

t

u

p

t

u

o

k

c

o

l

c

I

C

P

V

3

.

3

1

2#

D

PN

I

o

t

n

i

e

c

i

v

e

d

e

h

t

n

w

o

d

r

e

w

o

p

o

t

d

e

s

u

n

i

p

t

u

p

n

i

w

o

l

e

v

i

t

c

a

s

u

o

n

o

r

h

c

n

y

s

A

d

n

a

O

C

V

e

h

t

d

n

a

d

e

l

b

a

s

i

d

e

r

a

s

k

c

o

l

c

l

a

n

r

e

t

n

i

e

h

T

.

e

t

a

t

s

r

e

w

o

p

w

o

l

a

e

b

t

o

n

l

l

i

w

n

w

o

d

r

e

w

o

p

e

h

t

f

o

y

c

n

e

t

a

l

e

h

T

.

d

e

p

p

o

t

s

e

r

a

l

a

t

s

y

r

c

e

h

t

.

s

m

3

n

a

h

t

r

e

t

a

e

r

g

2

2K

L

C

SN

II

f

o

n

i

p

k

c

o

l

C

2

t

n

a

r

e

l

o

t

V

5

y

r

t

i

u

c

r

i

c

C

3

2A

T

A

D

SO

/

II

r

o

f

n

i

p

a

t

a

D

2

t

n

a

r

e

l

o

t

V

5

y

r

t

i

u

c

r

i

c

C

7

2

,

6

20

_

z

H

M

8

4T

U

O.

s

t

u

p

t

u

o

k

c

o

l

c

z

H

M

8

4

d

e

x

i

F

V

3

.

3

,

6

3

,

3

3

,

2

3

,

9

2

,

2

4

,

1

4

,

8

3

,

7

3

1

5

,

0

5

,

7

4

,

6

4

,

5

4

M

A

R

D

S

)

0

:

2

1

(

T

U

O

f

f

o

d

e

n

r

u

t

e

b

n

a

c

s

t

u

p

t

u

o

M

A

R

D

S

l

l

A

.

z

H

M

0

0

1

g

n

i

n

n

u

r

t

u

p

t

u

o

V

3

.

3

I

h

g

u

o

r

h

t

2C

3

5

,

4

5)

0

:

1

(

K

L

C

U

P

CT

U

O

g

n

i

d

n

e

p

e

d

z

H

M

3

3

1

r

o

z

H

M

0

0

1

,

z

H

M

6

6

.

t

u

p

t

u

o

k

c

o

l

c

s

u

b

t

s

o

H

V

5

.

2

.

s

n

i

p

)

0

:

2

(

S

F

n

o