11-Output Configurable Clock Buffer
T
R
I
Q
U
I
N
T
S E M I C O N D U C T O R, I N C .
FBIN
11
S1
10
REFCLK
9
S0
8
F1
7
F0
6
GND
5
GA1088
4 ...
Description
T
R
I
Q
U
I
N
T
S E M I C O N D U C T O R, I N C .
FBIN
11
S1
10
REFCLK
9
S0
8
F1
7
F0
6
GND
5
GA1088
4 VDD 3
TEST 12 VDD 13
Phase Detector VCO
Q10 Q9
Q0
14
2
11-Output Configurable Clock Buffer
Features
Wide frequency range: 18 MHz to 105 MHz Output configurations: three outputs at 1/2 fREF three outputs at fREF four outputs at fREF with adjustable phase or two outputs at fREF four outputs at 2x fREF four outputs at 2x fREF with adjustable phase
SYSTEM TIMING PRODUCTS
GND 15 Q1 Q2
16 17
MUX Divide Logic ÷4, ÷6, or ÷8 Output Buffers Group B
Phase Select
1 GND 28
Q8 Q7
Group A
Group C
27
VDD 18
26 VDD
19
20
21
22
23
24
25
GND
Q3
Q4
VDD
Q5
Q6
GND
TriQuint’s GA1088 is a configurable clock buffer which generates 11 outputs, operating over a wide range of frequencies — from 18 MHz to 105 MHz. The outputs are available at either 1x and 2x or at 1x and 1/2 x the reference clock frequency, fREF . When one of the Group A outputs (Q0– Q2) is used as feedback to the PLL, all Group A outputs will be at fREF , and all Group B (Q3–Q6) and Group C (Q7–Q10) outputs will be at 2x fREF . When one of the Group B outputs is used as feedback to the PLL, all Group A outputs will be at 1/2 x fREF and all Group B and Group C outputs will be at fREF . 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’s voltage-controlled oscillator (V...
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