TQ1089 Datasheet, PDF (1/10 Pages) TriQuint Semiconductor – 11-Output Configurable Clock Buffer

TRIQUINT
S E M I C O N D U C T O R, I N C .
Figure 1. Block Diagram
TQ1089
FBIN GND REFCLK GND GND GND GND
11 10 9
8
7
6
5
TEST 12
VDD 13
Q0 ¹⁴
GND ¹⁵
Q1 16
Q2 ¹⁷
VDD 18
Phase
Detector
VCO
MUX
Divide Logic
÷2
Output Buffers Group B
Group A
4 VDD
3 Q10
2 _Q9
1 GND
28 Q8
27 Q7
26 VDD
19 20
GND Q3
21 22 23
Q4 VDD Q5
24 25
Q6 GND
TriQuint’s 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–Q8) 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’s 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.
11-Output
Configurable
Clock Buffer
Features
• Wide frequency range:
65 MHz to 90 MHz and
130 MHz to 180 MHz
• 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
• Low output-to-output skew:
150 ps (max) within a group
• Near-zero propagation delay
–350 ps + 500 ps (max) or
–350 ps +700 ps (max)
• TTL–compatible with 30 mA
output drive
• 28–pin J–lead surface–mount
package
• Ideal for PowerPC ^™–based
designs
TriQuint’s patented output buffer design delivers a very low output-to-
output skew of 150 ps (max). The TQ1089’s symmetrical TTL outputs are
capable of sourcing and sinking 30 mA.
For additional information and latest specifications, see our website: www.triquint.com
1