Integrated
Circuit
Systems, Inc.
ICS9120-53
Frequency Generator for CD-ROM Systems
General Description
The
ICS9120-53
is a high performance frequency generator
designed to support digital compact disk drive systems. It
offers all clock frequencies required for the servo and
decoder sections of these devices. These frequencies are
synthesized from a single 16.9344 MHz on-chip oscillator.
High accuracy, low jitter PLLs meet the 150 ppm frequency
tolerance required by these systems. Fast output clock
edge rates minimize board induced jitter.
Unlike competitive devices, the
ICS9120-53
operates over
the entire 3.0-5.5V range.
Features
•
•
•
•
•
•
•
Generates 33.8688 MHz or 42.83 MHz decode clocks
plus the 12 and 24 MHz fixed clocks
Single 8.4672 MHz crystal or system clock reference
200ps one sigma jitter maintains 16-bit performance
Output rise/fall times less than 2.0ns
On-chip loop filter components
3.3V-5V supply range
8-pin, 150-mil SOIC
Applications
•
Specifically designed to support the high performance
requirements of CD-ROM drive systems
Functionality
X 1, X 2
(M Hz)
FS
D ivisor
C LK 1
8.4672
86.4672
C lock
0
1
X 1, X 2
(M Hz)
X12÷3
X61÷6
D ivisor
33.8688
42.83
O utput
(M Hz)
Pin Configuration
12M
24M
8.4672
8.4672
X52÷11÷2
X52÷11
20.0134
40.0268
Block Diagram
8-Pin SOIC
9120-53 Rev B 052497P
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.
ICS9120-53
Pin Descriptions
PIN
NUMBER
1
2
3
4
5
6
7
8
PIN
NAME
X1
VDD
GND
20M
CLK1
40M
FS
X2
TYPE
Input
Power
Power
Output
Output
Output
Input
Output
DESCRIPTION
Crystal or external clock source. Has feedback bias for crystal.
+Power supply input.
Ground return for Pin 2.
12 MHz fixed output clock.
33.8/42.83 MHz selectable clock output.
24 MHz fixedoutput clock.
Input selector for CLK1.
Crystal output drive.
2
ICS9120-53
Absolute Maximum Ratings
AVDD, VDD referenced to GND .......................................................................... 7V
Operating temperature under bias .................................................... 0
o
C to +70
o
C
Storage temperature ..................................................................... -65
o
C to +150
o
C
Voltage on I/O pins referenced to GND ...................... GND -0.5V to VDD +0.5V
Power dissipation ...................................................................................... 0.5 Watts
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other conditions above those indicated in the operational
sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect product reliability.
Electrical Characteristics at 5 V
V
DD
= +4.5 to +5.5 V, T
A
= 0 to 70
o
C unless otherwise stated
DC Characteristics
PARAM ETER
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
Output Low Voltage
Output High Voltage
Output Low Current
Output High Current
Supply Current
Pull-up Resistor Value
SYM BOL
V
IL
V
IH
I
IL
I
IH
V
OL
*
V
OH
*
I
OL
*
I
OH
*
I
DD
R
PU
*
AC Characteristics
Rise Time
Fall Time
Rise Time
Fall Time
Duty Cycle
Jitter, One Sigma
Jitter, Absolute
Jitter, One Sigma
Jitter, Absolute
Input Frequency Range
Output Frequency Range
Output M ean Frequency
Accuracy vs. Target
Power-up Time
Crystal Input Capacitance
T
r
*
T
f
*
T
r
*
T
f
*
D
t
*
T
jis
*
T
jab
*
T
jis
*
T
jab
*
F
i
*
F
o
*
F
oa
*
T
pu
*
C
inx
*
With 8.4672 M Hz input
0 to 33.8 M Hz
X1 (Pin 1), X2 (Pin 8)
15pF load, 0.8 to 2.0V
15pF load, 2.0 to 0.8V
15pF load, 20% to 80%
15pF load, 80% to 20%
15pF load @
50% of VDD
For all frequencies
For all frequencies
REFCLK only
REFCLK only
-
-
-
-
45.0
-
-500.0
-
-1200
8.0
11.0
-0.125
-
-5
0.9
0.7
1.8
1.4
50.0
100.0
300.0
266.0
750.0
8.4
-
-
5.5
5
2.0
1.5
3.25
2.5
55.0
200.0
500.0
450.0
1200
10.0
42.0
-0.04
12.0
-
ns
ns
ns
ns
%
ps
ps
ps
ps
M Hz
M Hz
%
ms
pF
V
IN
=0V
V
IN
=V
DD
I
OL
=+10mA
I
OH
=-30mA
V
OL
=0.8V
V
OH
=2.4V
Unloaded
TEST CONDITIONS
M IN
-
2.0
-18.0
-
-
2.4
25.0
-
-
-
TYP
-
-
-8.3
-
0.15
3.7
45.0
-53.0
24.0
400.0
M AX
0.8
-
-
5.0
0.4
-
-
-35.0
50.0
800.0
UNITS
V
V
µA
µA
V
V
mA
mA
mA
k ohm
*Parameter
is guaranteed by design and characterization. Not 100% tested in production.
3
ICS9120-53
Electrical Characteristics at 3.3 V
V
DD
= +3.0 to +3.7 V, T
A
= 0
O
C-70
o
C unless otherwise stated
DC Characteristics
PARAMETER
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
Output Low Voltage
Output High Voltage
Output Low Current
Output High Current
Supply Current
Pull-up Resistor Value
Rise Time
Fall Time
Rise Time
Fall Time
Duty Cycle
Jitter, One Sigma
Jitter Absolute
Input Frequency Range
Output Frequency Range
Output Mean Frequency
Accuracy vs. Target
Power-up Time
Crystal Input Capacitance
SYMBOL
V
IL
V
IH
I
IL
I
IH
V
OL
*
V
OH
*
I
OL
*
I
OH
*
I
DD
R
PU
*
Tr*
T
f
*
T
r
*
T
f
*
D
t
*
T
jis
*
T
jab
*
F
i
*
F
o
*
F
oa
*
T
pu*
C
inx*
TEST CONDITIONS
V
IN
=0V
V
IN
=V
DD
I
OL
=6.0mA
I
OH
=4.0mA
V
O
L=0.2V
DD
V
OH
=0.7V
DD
Unloaded
AC Characteristics
MIN
-
0.7V
DD
-8.0
-
-
0.85V
DD
15.0
-
-
-
-
-
-
-
45.0
-
-550.0
8.0
11.0
-0.125
-
-
TYP
-
-
-3.6
-
0.05V
DD
0.94V
DD
24.0
-13.0
16.0
620.0
1.5
1.0
2.2
1.5
50.0
150.0
330.0
8.4
-
-
5.5
5
MAX
0.2V
DD
-
-
5.0
0.1
-
-
-8.0
40.0
900.0
4.0
3.0
4.0
3.0
55.0
200
550.0
10.0
38.0
-0.04
12.0
-
UNITS
V
V
µA
µA
V
V
mA
mA
mA
k ohm
ns
ns
ns
ns
%
ps
ps
MHz
MHz
%
ms
pF
15pF
15pF
15pF
15pF
load
load
load
load
0.8 to 2.0V
2.0 to 0.8V
20% to 80%
80% to 20%
15pF load @ 50% ofVDD
For all frequencies
For all frequencies
With 8.4672 MHz input
0 to 33.8 MHz
X1 (Pin 1),
X2 (Pin 8)
*Parameter
is guaranteed by design and characterization. Not 100% tested in production.
4
ICS9120-53
0.154
0.031
0.024
0.008
0.194
0.063
0.015
0.016
0.050 0.006
± 0.004
0.238
0.025
8-Pin SOIC Package
Ordering Information
ICS9120M-53
Example:
ICS XXXX M-PPP
Pattern Number (2 or 3-digit number for parts with ROM code pattern)
Package Type
M =SOIC
Device Type (consists of 3 or 4-digit numbers)
Prefix
ICS, AV=Standard Device
5
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.
京公网安备 11010802033920号
EEWORLD
