ICST AVS9107C-03CS14, AV9107C-11CS14, AV9107C-10CS08, AV9107C-03CS14, ICS9107C-05CS08 Datasheet
...
Integrated
Circuit
Systems, Inc.
General Description
Features
AV9107C
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.
The AV9107C offers a tiny footprint solution for generating
two simultaneous clocks. One clock, the REFCLK, is a fixed
output frequency which is the same as the input reference
crystal (or clock). The other clock, CLK1, can vary between 2
and 120 MHz, with up to 16 selectable preprogrammed frequencies stored in internal ROM (frequency range depends on
design option).
The device has advanced features which include on-chip loop
filters, tristate outputs, and power-down capability. A minimum of external components - two decoupling capacitors and
an optional ferrite bead - are all that are required for jitter-free
operation. Standard versions for computer motherboard applications are the AV9107C-03, and AV9107C-05. Custom masked
versions, with customized frequencies and features, are available
in 6-8 weeks for a small NRE.
Patented on-chip Phase-Locked Loop with VCO for
clock generation
Provides reference clock and synthesized clock
Generates frequencies from 2 to 120 MHz (depending
on option), operates to 80 MHz for VDD 3.3V±10%
8-pin DIP or SOIC package or 14-pin DIP or SOIC
package
2 to 32 MHz input reference frequency (depending on
option)
On-chip loop filter
Up to 16 frequencies stored internally
Low power CMOS technology
Single +3.3 or +5 volt power supply
9107 C Rev D 2/3/98
Block Diagram
CPU Frequency Generator
Applications
Graphics: The AV9107C is the easiest to use, lowest cost,
and smallest footprint frequency generator for graphics
applications. It can generate up to 16 different frequencies,
including all frequencies necessary for VGA standards. It
should be used in place of the AV9105/6 when the reference
clock is also needed.
Computer: The AV9107C is the ideal solution for replacing
high speed oscillators and for reducing clock speeds to save
power in computers. The device provides smooth, glitchfree frequency transitions so that the CPU can continue to
operate during slow down or speed up. The rate of
frequency change makes the AV9107C compatible with all
386DX, 386SX, 486DX, 486DX2, and 486SX devices.
Standard versions include the AV9107C-03, -05, -10,
-11. Disk Drives: Smaller than a single crystal or an
oscillator, the tiny SOIC package can be used for any
general purpose frequency generation in disk drives.
Pentium is a trademark of Intel Corporation
PowerPC is a trademark of Motorola Corporation
2
AV9107C
Pin Configuration
Applications (cont.)
The most popular application is for Constant Density
Recording, where its low jitter output clock provides the
necessary frequencies for reading and recording. Another
popular application is for slowing the disk drive CPU to
save power.
High Speed Systems: TheAV9107C can be used as a
proximity oscillator - using a low frequency (down to 2
MHz) input to generate a high frequency clock (up to 120
MHz) near the device requiring the high frequency
(depending on option). This avoids the need to route high
speed traces over a long distance.
3
AV9107C
SLOW CLOCK FS3 FS2 FS1 FS0 CLK1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
16.00 MHz
39.99 MHz
50.11 MHz
80.01 MHz
66.58 MHz
100.23 MHz*
8.02 MHz
4.01 MHz
8.02 MHz
20.00 MHz
25.06 MHz
39.99 MHz
33.25 MHz
50.11 MHz
30.00 MHz
4.01 MHz
8.05 MHz
Actual Frequencies
Decoding Table for AV9107C-05, 14.318 MHz input
Decoding Table for AV9107C-10, 14.318 MHz input
*@ VDD=5 volts
Decoding Table for AV9107C-03, 14.318 MHz input
Decoding Table for AV9107C-11 (in MHz)
*@ VDD=5 volts
FS1 FS0 CLK1
0
0
1
1
0
1
0
1
25.06 MHz
33.29 MHz
40.00 MHz
50.11 MHz
FS1 FS0 CLK1
0
0
1
1
0
1
0
1
40.01 MHz
50.11 MHz
66.61 MHz
80.01 MHz
FS3 FS2 FS1 FS0 CLK1
0
0
0
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
16.00 MHz
39.99 MHz
50.11 MHz
80.01 MHz
66.58 MHz 100.23
MHz* 8.02 MHz
4.01 MHz
8.02 MHz
20.00 MHz
25.06 MHz
40.01 MHz
33.29 MHz
50.11 MHz*
4.01 MHz
2.05 MHz
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