ics9248-185 Integrated Device Technology, ics9248-185 Datasheet - Page 2

• Manufacturer Part Number: ics9248-185
• Description: Frequency Generator & Integrated Buffers For Pentium/protm & K6 - Via Pm133 Chipset
• Manufacturer: Integrated Device Technology

General Description
The ICS9248-185 is the single chip clock solution for Notebook designs using the 440BX or the VIA Apollo Pro 133 style
chipset. It provides all necessary clock signals for such a system. The ICS9248-185 provides CPU and PCI clocks with
continous spread spectrum. The ICS9248-185 employs a proprietary closed loop design, which tightly controls the percentage
of spreading over process and temperature variations.
Pin Descriptions
Notes:
1:
2:
ICS9248-185
, 1
N
1
3
U
, 6
, 6
to program logic Hi to VDD or GND for logic low.
Internal Pull-up Resistor of 120K to 3.3V on indicated inputs
Bidirectional input/output pins, input logic levels are latched at internal power-on-reset. Use 10Kohm resistor
1
8 ,
I P
M
, 9
7 1
2 2
5 2
6 2
7 2
8 2
0 1
1 1
2 1
4 1
1 2
3 2
5 1
2
4
7
9
5
1 ,
N
B
4 2
2 ,
1 ,
E
, 3
, 0
R
, 8
G
S
S
C
C
C
R
V
R
X
X
P
F
P
B
P
P
F
8 4
V
F
D
D
C
S
C
C
C
S
R
U
L
P
P
E
E
N
D
D
1
2
M
1
0
U
U
C I
C I
C I
_ I
R
R
K
E
F
F
F
D
D
D
1
1
E
1
0
2 ,
F
2 ,
H
A
A
C
C
_
S
L
I P
L
L
L
E
S
_
T
z
L
L
M
M
K
K
K
S
T
R
O
K
K
N
0
E
_
0
1
O
(
P
1
0
F
I
_ /
L
: 4
P
N
N
_ /
#
F
#
) 1
A
F
M
E
T
P
P
P
O
O
O
O
O
O
O
O
O
O
O
Y
W
W
I
I
I
I
I
I
W
I
U
U
U
U
U
U
U
U
U
U
U
N
N
N
N
N
N
N
P
R
T
R
T
T
T
T
T
T
T
T
T
R
T
E
4 1
4 1
P
f
G
r C
r C
r F
F
P
I
P
H
(
F
8 4
S
(
i E
T
w
C
i E
S
S
s
l c
n I
o c
r o
p n
o t
I C
I C
D
u
l e
o
e r
e r
h
P
r
a
h
c o
e e
h t
h t
3 .
3 .
u o
s y
s y
M
p p
w
s t l
s i
p p
n e
U
R
t n
c e
u q
t u
u q
m
S I
s k
8 1
r e
r e
8 1
r e
c
c
H
l a t
l a t
A
d n
r
o r
a
y l
s t
b a
b o
c
o l
o l
n e
n e
n u
o t
P
A
r d
y s
z
M
o l
r f
r f
l l
a
u s
C
M
M
k c
k c
f
C
e l
e l i
y c
y c
v i
e r
n i
o
o
i n
d e
e e
c n
e e
k c
r o
B
a F
C I
P
c
H
p p
t u
t u
z h
n e
y b
u p
U
g n
o l
u o
u o
U
r h
r f
e s
o n
m
e s
C
z
L
u p
r
r
u p
y b
u o
, y l
n u
n u
2
S
k c
C
e e
n o
, t
K
P
r
d o
o l
r
e l
p t
p t
e l
C
P
t u
f e
c t
f e
, t
p t
L
U
l
h c
i n
i n
. w
h
I C
t c
. t u
. t u
t c
L
a o
u o
r
o n
l c
, e
o
K
r e
r e
, t u
B
n u
s a
o n
o l
g n
g n
K
t u
l c
p i
c o
0
s d
p
p
i s
n e
u
m
n e
M
c
S
S
k c
_
c o
_ /
i n
. n i
. n i
u p
m
e s
f f
n i
o l
o p
s k
S
n y
n y
S
C
n i
O
p n
e c
e c
r e
F
g n
n i
s k
T
. ) t
k c
, s t
D
e t
P
w
L
D
L
l a
h c
h c
O
f s
a
t u
a
l a
U
R
l c
n r
r e
c
t a
l t
t a
E
d n
-
2
P
n
a F
o r
o r
3
o l
A
C
y l
c o
r o
5 .
l a
h c
=
h c
a h
t o
d e
w
. #
g o
3 .
M
L
o n
o n
) 0
o n
k c
V
S
h
. k
4 1
d e
d e
s t l
S
K
V
o l
f a
W
c i
y b
D
n e
s u
s u
t u
T .
D
o
D
e f
d a
3 .
R
o
h
s r
I
0
I
C
R
h
s r
s
E
p n
p n
n e
B
V
A
t c
8 1
o t
o t
P
t e
s i
A
l
o t
c
S
v e
u
D
M
d e
U
. t u
t u
o t
p a
M
M
C
C
f f
F
C
o t
p p
R
D
C
, l e
0
p p
R
P
P
r e
R
y b
E
H
L
_ /
L
o
b a
3 (
U
U
(
E
F
b a
) 1
P I
. z
t u
K
w
u o
F
E
p 6
e l
P
l c
l c
h
, s
o
u p
e l
_
o t
h
T
C
p t
n e
t u
c o
c o
S
) F
d
g i
&
_ I
. s t
I
t u
d
E
p e
e b
u p
O
s k
s k
, h
p e
i
L
S
f s
a
S
p n
n e
N
i t
d n
T
D
n e
i e
s i
i w
i w
o r
t
O
t u
i d
e h
R
h t
t s
i d
s
P
h t
h t
m
e f
g n
A
r e
t e
o l
#
g n
e h
l c
d e
M
1
1
B
w
f
o t
r f
n o
c o
4 -
4 -
r o
U
s
a b
n o
S
e e
s k
s n
s n
(
F
a
T
) 0
o p
F
k c
l t
F
R
F
r
R
s
s
E
n u
a
R
w
O
g o
o l
e k
e k
E
e r
r
R
E
s e
r e
N
i n
E
w
c i
w
w
E
s
I
_
G
g n
s i
o t
N
m
_
t
S
0 "
C (
C (
e h
E
o t
S
E
p p
a
p
r o
R
E
l "
a n
L
f r
P
P
n i
a
b a
L
U
U
o b
u b
e g
v e
o r
. e l
a e
a e
e v
l e
f f
m
m
r e
l r
l r
e
X
. t n
) y
) y
2