ICS ICS9120-52

Integrated
Circuit
Systems, Inc.
ICS9120-52
Frequency Generator for CD-ROM Systems
General Description
Features
The ICS9120-52 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 ICS9120-52 operates over
the entire 3.0-5.5V range.
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Applications
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Functionality
X 1, X 2
(M Hz)
FS
D ivisor
C LK 1
8.4672
0
X12÷3
33.8688
86.4672
1
X61÷6
42.83
C lock
X 1, X 2
(M Hz)
D ivisor
O utput
(M Hz)
20M
8.4672
X52÷11÷2
20.0134
40M
8.4672
X52÷11
40.0268
Generates 33.8688 MHz or 42.83 MHz decode clocks
plus the 20 and 40 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
Specifically designed to support the high performance
requirements of CD-ROM drive systems
Pin Configuration
8-Pin SOIC
Block Diagram
9120-52 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.
ICS9120-52
Pin Descriptions
PIN
NUMBER
1
2
3
PIN
NAME
X1
VDD
GND
4
5
6
7
8
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.
20 MHz fixed output clock.
33.8/42.83 MHz selectable clock output.
40 MHz fixedoutput clock.
Input selector for CLK1.
Crystal output drive.
2
ICS9120-52
Absolute Maximum Ratings
AVDD, VDD referenced to GND ...........................................................................7V
Operating temperature under bias ...................................................... 0oC to +70oC
Storage temperature ....................................................................... -65oC to +150oC
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
VDD = +4.5 to +5.5 V, T A = 0 to 70oC unless otherwise stated
DC Characteristics
PARAM ETER
SYM BOL
Input Low Voltage
V IL
Input High Voltage
V IH
Input Low Current
I IL
TEST CONDITIONS
M IN
TYP
M AX
UNITS
-
-
0.8
V
2.0
-
-
V
V IN=0V
-18.0
-8.3
-
µA
µA
Input High Current
I IH
V IN =V DD
-
-
5.0
Output Low Voltage
V OL *
I OL =+10mA
-
0.15
0.4
V
Output High Voltage
V OH *
I OH =-30mA
2.4
3.7
-
V
Output Low Current
I OL *
V OL =0.8V
25.0
45.0
-
mA
Output High Current
I OH*
V OH=2.4V
-
-53.0
-35.0
mA
Supply Current
I DD
Unloaded
-
26.0
50.0
mA
-
400.0
800.0
k ohm
Pull-up Resistor Value
R PU*
AC Characteristics
Rise Time
T r*
15pF load, 0.8 to 2.0V
-
0.9
2.0
ns
Fall Time
T f*
15pF load, 2.0 to 0.8V
-
0.7
1.5
ns
Rise Time
T r*
15pF load, 20% to 80%
-
1.8
3.25
ns
Fall Time
T f*
15pF load, 80% to 20%
-
1.4
2.5
ns
Duty Cycle
D t*
15pF load @
50% of V DD
45.0
50.0
55.0
%
Jitter, One Sigma
T j1s*
For all frequencies
-
100.0
200.0
ps
Jitter, Absolute
T jab*
For all frequencies
-500.0
300.0
500.0
ps
Input Frequency Range
F i*
8.0
8.4
100.0
M Hz
Output Frequency Range
F o*
11.0
-
42.0
M Hz
Output M ean Frequency
Accuracy vs. Target
F oa *
With 8.4672 M Hz input
-0.125
-
-0.04
%
Power-up Time
T pu *
0 to 33.8 M Hz
-
5.5
12.0
ms
Crystal Input Capacitance
C inx*
X1 (Pin 1), X2 (Pin 8)
-5
-
-
*Parameter is guaranteed by design and characterization. Not 100% tested in production.
3
pF
ICS9120-52
Electrical Characteristics at 3.3 V
VDD = +3.0 to +3.7 V, TA = 0OC-70oC unless otherwise stated
DC Characteristics
PARAMETER
Input Low Voltage
Input High Voltage
Input Low Current
SYMBOL
V IL
V IH
IIL
TEST CONDITIONS
V IN=0V
MIN
0.7V DD
-8.0
TYP
-3.6
MAX
0.2V DD
-
UNITS
V
V
µA
Input High Current
Output Low Voltage
Output High Voltage
Output Low Current
IIH
V OL *
V OH *
IOL *
V IN=V DD
IOL =6.0mA
IOH=4.0mA
V OL =0.2V DD
0.85V DD
15.0
0.05V DD
0.94V DD
24.0
5.0
0.1
-
µA
V
V
mA
Output High Current
Supply Current
Pull-up Resistor Value
IOH*
IDD
R PU*
V OH=0.7V DD
Unloaded
-
-13.0
17.0
620.0
-8.0
40.0
900.0
mA
mA
k ohm
AC Characteristics
Rise Time
T r*
15pF load 0.8 to 2.0V
-
1.5
4.0
ns
Fall Time
Rise Time
Fall Time
T f*
T r*
T f*
-
1.0
2.2
1.5
3.0
4.0
3.0
ns
ns
ns
Duty Cycle
D t*
45.0
50.0
55.0
%
Jitter, One Sigma
T j1s*
-
150.0
200
ps
Jitter Absolute
T jab*
15pF load 2.0 to 0.8V
15pF load 20% to 80%
15pF load 80% to 20%
15pF load @ 50% of
V DD; Except REFCLK
For all frequencies
except REFCLK
For all frequencies
except REFCLK
-550.0
330.0
550.0
ps
Input Frequency Range
Output Frequency Range
Output Mean Frequency
Accuracy vs. Target
Power-up Time
Fi*
F o*
8.0
11.0
8.4
-
10.0
38.0
MHz
MHz
-0.125
-
-0.04
%
-
5.5
12.0
ms
-
5
-
pF
Crystal Input Capacitance
F oa *
With 8.4672 MHz input
T pu *
0 to 33.8 M Hz
X1 (Pin 1),
X2 (Pin 8)
C inx*
*Parameter is guaranteed by design and characterization. Not 100% tested in production.
4
ICS9120-52
0.154
0.031
0.194
0.063
0.015
0.024
0.008
0.025
0.016
0.238
0.050 0.006
± 0.004
8-Pin SOIC Package
Ordering Information
ICS9120M-52
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.