PL611-20
Programmable Quick Turn Clock
T M
FEATURES
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Advanced programmable PLL design
Very low Jitter and Phase Noise (< 40ps Pk-Pk typical)
Up to 3 outputs
Output frequency up to 200MHz CMOS.
Crystal inputs:
o
Fundamental crystal: 10MHz-30MHz
o
3
RD
overtone crystal: Up to 75MHz
Accepts <1.0V reference signal input voltage
One programmable I/O pin can be configured as
Output Enable (OE), or Frequency Selection input
(FSEL), or Reference clock.
Single 2.5V or 3.3V ± 10% power supply
Operating temperature range from -40°C to 85°C
Available in 8-pin MSOP/SOIC, 6-pin SOT Green/
RoHS compliant packages, or Die
PIN CONFIGURATION
XIN/FIN
GND
CLK0
CLK1
1
8
XOUT
CLK2,OE,FSEL
NC
VDD
PL611-20
PL611-20
SOP-8
MSOP-8
1
2
3
6
5
4
2
3
4
7
6
5
CLK1
GND
XIN/FIN
VDD
CLK2,OE,FSEL
XOUT
SOT-23
PL611-20
PL611-20
DESCRIPTION
The PL611-20 is a low-cost general purpose frequency synthesizer and a member of PhaseLink’s Factory
Programmable ‘Quick Turn Clock (QTC)’ family. PhaseLink’s PL611-20 product family can generate any output
frequency up to 200 MHz from fundamental crystal input between 10 MHz - 30 MHz, or a 3rd overtone crystal of
up to 75Mhz.
BLOCK DIAGRAM
XIN/FIN
XOUT
Xtal
OSC
FRef
R-counter
(8-bit)
Phase
Detector
M -counter
(10-bit)
Charge
Pump
Loop
Filter
Programming
Logic
FSEL
OE
CLoad
F
VCO
= F
Ref.
* (2 * M /R)
P-counter
(5-bit)
VCO
F
Out
= F
VCO
/ (2 * P)
CLK [0:1]
CLK2, OE, FSEL
Programmable Function
/1, /2
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
Rev 07/06/05 Page 1