ICS9120-53 Datasheet, PDF (1/5 Pages) Integrated Circuit Systems – Frequency Generator for CD-ROM Systems

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.
Functionality
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
X1, X2
(M Hz)
FS
Divisor CLK1
8.4672
0
X12÷3 33.8688
Pin Configuration
86.4672
1
X 61 ÷6
42.83
C loc k
12M
24M
X1, X2
(M Hz)
8.4672
8.4672
D ivis o r
X 52 ÷11 ÷2
X 52 ÷11
O utput
(M Hz)
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.