Integrated
Circuit
Systems, Inc.
Low Cost 20-Pin Frequency Generator
ICS9169C-36
Pin Configuration
Block Diagram
ICS9169C-36RevD060197P
20-Pin SSOP
Functionality
3.3V10%, 0-70
C
Clock source driving X1 pin or crystal (X1, X2) = 14.31818 MHz
(all frequencies in MHz)
Features
Generator for periphary clock chips as companion
device to CPU/SDRAM/PCI generator.
Accepts clock input at X1 pin or crystal across X1,
X2 pins as 14.31818 MHz nominal inputs.
Three REF clock buffer outputs (SREF is Strong)
Two 48MHz and one 24 MHz outputs
Selectable audio clock generator with audio (Audio)
and half speed (Audio/2) outputs
20 pin (209 mil) SSOP package
OE
All Outputs
0
Tristate
1
Active
FS1
FS0
AUDIO
AUDIO/2
SREF, REF
48 MHz
24 MHz
0
0
XTAL/2
XTAL/4
14.318
XTAL/2
XTAL/4
0
1
24.5795
12.2898
14.318
48.008
24.004
1
0
33.8680
16.9340
14.318
48.008
24.004
1
1
LOW
LOW
14.318
48.008
24.004
Description
The ICS9169C-36 generates the I/O clocks needed as a satellite
clock generator to a CPU and PCI clock source (such as the
ICS9148-01 or ICS9150-01). This device can generate the
audio Codec or DSP clocks if required (or Stop those outputs
Low).
The device is nominally driven at the X1 pin by a 14.31818
MHz clock source. The device can also be driven by a crystal
using external load capacitors as a stand-alone generator.
The SREF0 output is a reference clock output which is stronger
to allow multiple ISA slots.
ICS reserves the right to make changes in the device data identified in this publication
without further notice. ICS advises its customers to obtain the latest version of all
device data to verify that any information being relied upon by the customer is current
and accurate.
2
ICS9169C-36
Pin Descriptions
PIN NUMBER
PIN NAME
TYPE
DESCRIPTION
1, 8, 13, 18
VDD
PWR
3.3V I/O power supply
2
X1
IN
14.318MHz input (requires external components for feedback
resistor and load capacitors to be used with a crystal)
3
X2
OUT
Crystal output (no connect for non-crystal applications)
4, 11, 16
GND
Ground
Ground
5
OE
IN
Output enable (Tri-states all outputs when held low). Has pullup
6
AUDIO
OUT
3.3V Audio clock, runs per select table
7
AUDIO/2
OUT
3.3V Audio clock, runs per select table
9, 10
FS0, FS1
IN
Frequency mode select pins. Has pullup.
12
24 MHz
OUT
3.3V clock, runs @ 24 MHz
14, 15
48 MHz (0:1)
OUT
3.3V Clock, runs @ 48 MHz
19, 20
REF1, REF2
(1:2)
OUT
3.3V clock, runs @ 1x X1
17
SREF0
OUT
Strong reference clock OUT 3.3V clock, runs @ 1x X1
ICS9169C-36
3
Absolute Maximum Ratings
Electrical Characteristics at 3.3V
Supply Voltage ............................................................................................................ 7.0 V
Voltage on I/O pins referenced to GND ............................... GND 0.5 V to V
DD
+0.5 V
Operating Temperature under bias .............................................................. 0C to +70C
Power dissipation ................................................................................................. 0.5 Watts
Storage Temperature .............................................................................. 40C to +150C
V
DD
= 3.0 3.7 V, T
A
= 0 70
C unless otherwise stated
Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are
stress specifications only and functional operation of the device at these or any other conditions above those listed in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect product reliability.
DC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Voltage
V
IL
V
DD
=3.3V
-
-
0.2V
DD
V
Input High Voltage
V
IH
V
DD
=3.3V
0.7V
DD
-
-
V
Input Low Current
I
IL
V
IN
=0V (pull-up pin)
-250
-50
A
Input High Current
I
IH
V
IN
=V
DD
-5
0
5
A
Output Low Voltage
V
OL1
SREF0 I
OL
= 16mA
0.25
0.40
V
Output High Voltage
V
OH1
SREF0 I
OH
= -16mA
2.4
2.8
V
Output Low Current
I
OL1
SREF0 V
OL
= 1.0V
32
50
mA
Output High Current
I
OH1
SREF0 V
OH
= 2.0V
-44
-28
mA
Output Low Voltage
V
OL2
AUDIO, AUDIO/2,
24MHz, 48MHz (0:1) Clocks
I
OL
= 10mA
0.25
0.4
V
Output High Voltage
V
OH2
AUDIO, AUDIO/2,
24MHz, 48MHz (0:1) Clocks
I
OH
= -10mA
2.4
2.8
V
Output Low Current
I
OL2
AUDIO, AUDIO/2,
24MHz, 48MHz (0:1) Clocks
V
OL
= 0.8V
19
30
mA
Output High Current
I
OH2
AUDIO, AUDIO/2,
24MHz, 48MHz (0:1) Clocks
V
OH
= 2.0V
-26
-16
mA
Output Low Voltage
V
OL3
REF (1:2) I
OL
= 8mA
0.3
0.4
V
Output High Voltage
V
OH3
REF (1:2) I
OH
= -8mA
2.4
2.8
V
Output Low Current
I
OL3
REF (1:2) V
OL
= 0.8V
16
25
mA
Output High Current
I
OH3
REF (1:2) V
OH
= 2.0V
-22
-14
mA
Supply Current
I
DD
Unloaded, 33.86 MHz
-
28
45
mA
Output Frequency Change
over Supply and Temperature
1
F
D
With respect to typical
frequency
-
20
100
ppm
Short circuit current
1
I
SC
Each output clock
20
30
-
mA
Input Capacitance
1
C
I
Except X1, X2
-
-
10
pF
Load Capacitance
1
C
L
Pins X1, X2
-
5
-
pF
Pull-up Resistor
R
pu
at V
IN
=V
DD
-1V
15
30
60
k ohm
4
ICS9169C-36
Electrical Characteristics at 3.3V
V
DD
= +3.0 V10%, T
A
= 0 70
C unless otherwise stated
Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.
Note 2: Absolute Jitter is defined as largest difference of the shortest period to the mean or the longest period to the
mean in a sampling of 10,000 clock cycles. One Sigma Jitter is the calculated standard deviation.
AC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Clock Rise Time
1
t
ICr
-
-
20
ns
Input Clock Fall Time
1
t
ICf
-
-
20
ns
Rise time
1
SREF0 output
t
r1
45pF load, 0.8 to 2.0V
0.3
1.3
2.0
ns
Slew SREF0 Rising
1
S
lew1
45pF 0.4 to 2.4V
0.8
0.95
4.0
V/ns
Fall time
1
SREF0 output
t
f1
45pF load, 0.8 to 2.0V
0.3
1.0
2.0
ns
Slew SREF0 Falling
1
S
lew2
45pF 2.4 to 0.4V
0.8
0.95
4.0
V/ns
Rise time
1
other outputs
t
r2
20pF load, 0.8 to 2.0V
0.6
1.2
2.0
ns
Fall time
1
other outputs
t
f2
20pF load, 0.8 to 2.0V
0.6
0.9
2.0
ns
Duty cycle
1
d
t
25pF load at 1.5V (All outputs)
45
50
55
%
Jitter, one sigma
1,2
t
jls1
10,000 cycles (All outputs)
-
100
250
ps
Jitter, absolute
1,2
t
jab1
10,000 cycles 24, Audio, Audio/2
750
-
750
ps
Jitter, absolute
1,2
t
jab2
10,000 cycles 48MHz
-500
500
ps
Jitter, absolute
1,2
t
jab3
10,000 cycles REF CLKS
-3.5%
-
3.5
%
Input Frequency
1
f
in
11
14.318
16
MHz
Normal output frequency
F
NOM
with X1 driven at 14.31818MHz
48MHz
24MHz
33.86MHz
24.5795MHz
48.008MHz
24.004MHz
33.8650MHz
24.5795MHz
MHz
Ratio of Nominal frequency
to target frequency
1
f/f
with X1 driven at 14.31818MHz
24.0MHz
48.0MHz
33.8688MHz
24.576MHz
166
166
-200
-200
166.6
166.6
-23.6
+144
167
167
+200
+200
ppm
Clock skew between
AUDIO/2 and
AUDIO outputs
1
T
sk
250
-
+250
ps
Power-up Time
1
t
tPO
to 33.8 MHz on Audio
-
5
10
ms
ICS9169C-36
5
ICS XXXX F-PPP
Example:
Package Type
F=SSOP
Device Type (consists of 3 or 4 digit numbers)
ICS=Standard Device
Prefix
Ordering Information
ICS9169CF-36
Pattern Number(2 or 3 digit number for parts with ROM code patterns)
SYMBOL
COMMON
DIMENSIONS
VARIATIONS
D
MIN.
NOM.
MAX.
N
MIN.
NOM.
MAX.
A
0.068
0.073
0.078
14
0.239
0.244
0.249
A1
0.002
0.005
0.008
16
0.239
0.244
0.249
A2
0.066
0.068
0.070
20
0.278
0.284
0.289
b
0.010
0.012
0.015
24
0.318
0.323
0.328
c
0.004
0.006
0.008
28
0.397
0.402
0.407
D
See Variations
30
0.397
0.402
0.407
E
0.205
0.209
0.212
e
0.0256 BSC
H
0.301
0.307
0.311
L
0.025
0.030
0.037
N
See Variations
0
4
8
Dimensions in inches
ICS reserves the right to make changes in the device data identified in this publication
without further notice. ICS advises its customers to obtain the latest version of all
device data to verify that any information being relied upon by the customer is current
and accurate.
209 mil 20Pin SSOP Package
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