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
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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
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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梅3
X61梅6
D ivisor
33.8688
42.83
O utput
(M Hz)
Pin Configuration
12M
24M
8.4672
8.4672
X52梅11梅2
X52梅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.
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