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ICS9159CM-14 Datasheet(PDF) 1 Page - Integrated Circuit Systems

Part # ICS9159CM-14
Description  Frequency Generator and Integrated Buffer for PENTIUM?
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS9159CM-14 Datasheet(HTML) 1 Page - Integrated Circuit Systems

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Integrated
Circuit
Systems, Inc.
General Description
Features
ICS9159C-14
Frequency Generator and Integrated Buffer for PENTIUM™
ICS9159C-14RevC062397P
Block Diagram
The ICS9159C-14 generates all clocks required for high
speed RISC or CISC microprocessor systems such as 486,
Pentium, PowerPC,
™ etc. Four different reference frequency
multiply-ing factors are externally selectable with smooth
frequency transitions. These multiplying factors can be
customized for specific applications. It has a TURBO pin
that can speed up the 60 and 66.6 MHz clocks by 2.5%.
High drive BCLK outputs provide typically greater than 1V/
ns slew rate into 30pF loads. PCLK outputs provide typically
better than 1V/ns slew rate into 20pF loads while maintaining
50±5% duty cycle.
Generates up to four processor and six bus clocks,
plus disk, USB and reference clocks
Synchronous clocks skew matched to 250ps window
on PCLKs and 500ps window on BCLKs
TURBO input pin that can speed up the 60 and
66.6 MHz PCLKs by 2.5%.
2.5V or 3.3V output: PCLK (0:3)
3.0V - 5.5V supply range
28-pin SOIC package
Pentium is a trademark of Intel Corporation.
PowerPC is a trademark of Motorola Corporation.
Pin Cnfiguration
28-Pin SOIC
Functionality
PCLK(0:3)
BCLK(0:5)
USB
DISK
VCO/2
PCLK/2
48 MHz
24 MHz
All frequencies in MHz, assuming 14.318 MHz input.
TURBO
FS1
FS0
X1, REF
(MHz)
PCLK
(MHz)
1
0
0
14.318
50
1
0
1
14.318
66.8
1
1
0
14.318
60
1
1
1
14.318
55
0
0
0
14.318
83.3
0
0
1
14.318
68.4
0
1
0
14.318
61.6
0
1
1
14.318
75
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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