ics9159-14 Integrated Device Technology, ics9159-14 Datasheet
ics9159-14
Manufacturer Part Number
ics9159-14
Description
Frequency Generator And Integrated Buffer For Pentium
Manufacturer
Integrated Device Technology
Datasheet
1.ICS9159-14.pdf
(7 pages)
Frequency Generator and Integrated Buffer for PENTIUM™
General Description
The ICS9159-14 generates all clocks required for high speed
RISC or CISC microprocessor systems such as 486, Pentium,
PowerPC,Ô etc. Four different reference frequency multiply-
ing factors are externally selectable with smooth frequency
transitions. These multiplying factors can be customized for
specific applications.
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
±5% duty cycle.
Block Diagram
9159-14 Rev B 3/16/00
Integrated
Circuit
Systems, Inc.
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.
•
•
•
•
Features
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
3.0V - 5.5V supply range
28-pin SOIC package
All frequencies in MHz, assuming 14.318 MHz input.
*VCO range is limited from 60 - 200 MHz.
Functionality
P
F
C
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1
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1
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Pin Configuration
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0
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1
1
0
B
28-Pin SOIC
C
P
C
9
L
5 6
9 6
1 1
/ 2
L
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Pentium is a trademark of Intel Corporation.
PowerPC is a trademark of Motorola Corporation.
*
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ICS9159-14
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ics9159-14 Summary of contents
Page 1
... Systems, Inc. Frequency Generator and Integrated Buffer for PENTIUM™ General Description The ICS9159-14 generates all clocks required for high speed RISC or CISC microprocessor systems such as 486, Pentium, PowerPC,Ô etc. Four different reference frequency multiply- ing factors are externally selectable with smooth frequency transitions ...
Page 2
... ICS9159-14 Pin Descriptions ...
Page 3
... ICS9159-14 +0 ...
Page 4
... ICS9159-14 Electrical Characteristics at 3.3V ° 3.1 – 3 – ...
Page 5
... ICS9159- ...
Page 6
... ICS9159-14 Electrical Characteristics at 5.5V ° 4.5 – 5 – ...
Page 7
... ICS reserves the right to make changes in the device data identified in this publication 7 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. ICS9159- ...