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TQ2060 Datasheet

  • TQ2060

  • High-Frequency Clock Generator

  • 6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. Pinout Diagram
TESTIN
REFCLK
GND
GND
TQ2060
9
8
7
6
5
4
NC
11
10
High-Frequency
Clock Generator
NC
VDD
NC
TEST1
TEST2
NC
NC
GND
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Control
MUX
Phase
Detector
VCO
NC
梅
10
梅
2
NC
MUX
3
2
1
NC
NC
NC
Features
鈥?Output frequency range:
350 MHz to 500 MHz
鈥?One differential PECL output:
600 mV (min) swing
鈥?Common-mode voltage:
V
DD
鈥?.2 V (max),
V
DD
鈥?.6 V (min)
鈥?Period-to-period output jitter:
25 ps peak-to-peak (typ)
70 ps peak-to-peak (max)
鈥?Reference clock input:
35 MHz to 50 MHz TTL-level
crystal oscillator
鈥?Self-contained loop filter
鈥?Optional 200-ohm pull-down
resistors for AC-coupled outputs
鈥?+5 V power supply
鈥?28-pin J-lead surface-mount
package
鈥?Ideal for designs based on
DEC Alpha AXP
鈩?/div>
processors
28
NC
27
NC
26
AVDD
QN
AGND
Q
EVDD
PDR2
PDR1
GND
TriQuint鈥檚 TQ2060 is a high-frequency clock generator. It utilizes a 35 MHz
to 50 MHz TTL input to generate a 350 MHz to 500 MHz PECL output. The
TQ2060 has a completely self-contained Phase-Locked Loop (PLL) running
at 700 MHz to 1000 MHz. This stable PLL allows for a low period-to-period
output jitter of 70 ps (max), and enables tight duty cycle control of
55% to 45% (worst case).
The TQ2060 provides optional 200 ohm on-chip pull-down resistors which
are useful if the output is AC-coupled to the device being driven. In order
to use these resistors, pin 20 (PDR2) should be connected to pin 21 (QN),
and pin 23 (PDR1) should be connected to pin 22 (Q).
Various test modes on the chip simplify debug and testing of systems by
slowing the clock output or by bypassing the PLL.
For additional information and latest specifications, see our website:
www.triquint.com
1
SYSTEM TIMING
PRODUCTS

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