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TQ1089 Datasheet

  • TQ1089

  • 11-Output Configurable Clock Buffer

  • 10頁(yè)

  • TRIQUINT

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T
R
I
Q
U
I
N
T
S E M I C O N D U C T O R, I N C .
Figure 1. Block Diagram
FBIN GND REFCLK GND GND GND
11
10
9
8
7
6
TQ1089
GND
5
4
VDD
3
TEST
12
VDD
13
Phase
Detector
VCO
Q10
Q9
11-Output
Configurable
Clock Buffer
Features
鈥?Wide frequency range:
65 MHz to 90 MHz and
130 MHz to 180 MHz
鈥?Output configurations:
eight outputs at f
REF
two outputs at 2x f
REF
or
nine outputs at
1
/
2
x f
REF
one output at f
REF
鈥?Low output-to-output skew:
150 ps (max) within a group
SYSTEM TIMING
PRODUCTS
Q0
14
2
GND
15
Q1
Q2
16
17
MUX
Divide Logic
梅2
Output Buffers Group B
Group A
1
GND
28
27
Q8
Q7
VDD
18
26
VDD
19
20
21
22
23
24
25
GND
Q3
Q4
VDD
Q5
Q6
GND
TriQuint鈥檚 TQ1089 is a configurable clock buffer which generates 11
outputs, operating over a wide range of frequencies from 65 MHz to 90
MHz and from 130 MHz to 180 MHz. The outputs are available at either 1x
and 2x or at 1x and
1
/
2
x the reference clock frequency, f
REF
. When one of
the Group A outputs (Q0鈥換8) is used as feedback to the PLL, all Group A
outputs will be at f
REF
, and all Group B outputs (Q9, Q10) will be at 2x f
REF
. When one of the Group B outputs is used as feedback to the PLL, all
Group A outputs will be at
1
/
2
x f
REF
and all Group B outputs will be at f
REF
.
A very stable internal Phase-Locked Loop (PLL) provides low-jitter
operation. This completely self-contained PLL requires no external
capacitors or resistors. The PLL鈥檚 Voltage-Controlled Oscillator (VCO) has a
frequency range from 260 MHz to 360 MHz. By feeding back one of the
output clocks to FBIN, the PLL continuously maintains frequency and
phase synchronization between the reference clock (REFCLK) and each of
the outputs.
TriQuint鈥檚 patented output buffer design delivers a very low output-to-
output skew of 150 ps (max). The TQ1089鈥檚 symmetrical TTL outputs are
capable of sourcing and sinking 30 mA.
鈥?Near-zero propagation delay
鈥?50 ps + 500 ps (max) or
鈥?50 ps +700 ps (max)
鈥?TTL鈥揷ompatible with 30 mA
output drive
鈥?28鈥損in J鈥搇ead surface鈥搈ount
package
鈥?Ideal for PowerPC
鈩?/div>
鈥揵ased
designs
For additional information and latest specifications, see our website:
www.triquint.com
1

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