AV9170
Using the AV9170
The
AV9170
has the following characteristics:
1. Rising edges at IN and FBIN are lined up. Falling
edges are not synchronized.
2. The relationship between the frequencies at FBIN and IN
with CLK1 feedback is shown in Table 1 below.
Eliminate High Speed
Clock Routing Problems
The
AV9170
makes it possible to route lower speed clocks
over long distances on the PC board and to place an
AV9170
next to the device requiring a higher speed clock. The
multiplied output can then be used to produce a phase locked,
higher speed output clock.
Functionality (Table 1:)
FS1
0
0
1
1
FS0
0
1
0
1
f
FBIN
(-01, -02) f
FBIN
(-04, -05)
2 • f
IN
3 • f
IN
4 • f
IN
5 • f
IN
f
IN
6 • f
IN
8 • f
IN
10 • f
IN
Compensate for Propagation Delays
Including an
AV9170
in a timing loop allows the use of PALs,
gate arrays, etc., with loose timing specifications. The
AV9170
compensates for the delay through the PAL and
synchronizes the output to the input reference clock.
Operating Frequency Range
The
AV9170
is offered in versions optimized for operation
in two frequency ranges. The -01 and -04 cover high
frequencies, 20 to 100 MHz.* The -02 and -05 operate from
5 to 25 MHz.* The
AV9170
can be supplied with custom
multiplication factors and operating ranges. Consult ICS for
details.
3. The frequency of CLK2 is half the CLK1 frequency.
4. The CLK1 frequency ranges are:
V
DD
= 5V
AV9170-01, -04
AV9170-02, -05
20 < f
CLK1
<
5 < f
CLK1
<
107 MHz*
26.75 MHz*
V
DD
= 3.3V
< 66.7
< 16.7
3.3V VDD Operation
The
AV9170
does operate at both 5.0V and 3.3V system
conditions. Please note the Electrical Characteristic specifica-
tions at 3.3V include a limited output frequency (66.6 MHz
max.) and a wider skew of FBIN to CLK1. For 3.3V±5%
(3.15V min.), this skew is -5.0 to 0 ns. At 3.3V±10% (3.0V
min.), the skew is widened to -8 ns to 0 ns and should be
accounted for in system design.
*At 3.3V, the maximum CLK1 frequency is 66.7 MHz for -01,
-04 and 16.7 MHz for -02, -05.
The
AV9170
will only operate correctly within these
frequency ranges.
Figure 1:
Application of
AV9170 for Multiple Outputs
3
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
