PLL520-80 Datasheet, PDF (1/7 Pages) PhaseLink Corporation – Low Phase Noise VCXO (9.5-65MHz)

PLL520-80
Low Phase Noise VCXO (9.5-65MHz)
FEATURES
• 19MHz to 65MHz fundamental crystal input.
• Output range: 9.5MHz – 65MHz
• Complementary outputs: PECL or LVDS output.
• Selectable OE Logic (enable high or enable low).
• Available outputs: PECL, LVDS, or CMOS (High
Drive (30mA) or Standard Drive (10mA) output).
• Integrated variable capacitors.
• Supports 2.5V or 3.3V Power Supply.
• Available in die form.
DESCRIPTION
The PLL520-80 is a VCXO IC specifically designed to
work with fundamental crystals between 19MHz and
65MHz. The selectable divide by two feature extends
the operation range from 9.5MHz to 65MHz. It
requires very low current into the crystal resulting in
better overall stability. The OE logic feature allows
selection of enable high or enable low. Furthermore,
it provides selectable CMOS, PECL or LVDS outputs.
DIE SPECIFICATIONS
Name
Size
Reverse side
Pad dimensions
Thickness
Value
62 x 65 mil
GND
80 micron x 80 micron
10 mil
BLOCK DIAGRAM
VCON ^Oscillator
Amplifier
XIN
w/
integrated
varicaps
XOUT
OE
Q
Q
S2
PLL520-80
DIE CONFIGURATION
65 mil
25
24 23 22 21
20
19
18
XIN 26
XOUT 27
Die ID:
A2020-20C
N/C 28
S2^ 29
OE
30
CTRL
VCON 31
C502A
1 23 4 5
6
78
(1550,1475)
17 GNDBUF
16 CMOS
15 LVDSB
14 PECLB
13 VDDBUF
12 VDDBUF
11 PECL
10 LVDS
9 OE_SEL^
Y ^(0,0)
X
OUTPUT SELECTION AND ENABLE
OUT_SEL1* OUT_SEL0*
(Pad 18)
(Pad 25)
Selected Output*
0
0
High Drive CMOS
0
1
Standard CMOS
1
0
LVDS
1
1
PECL (default)
OE_SELECT OE_CTRL
(Pad 9)
(Pad 30)
State
0
Tri-state
0
1 (Default) Output enabled
1 (Default)
0 (Default) Output enabled
1
Tri-state
Pads #9, #18 & #25: Bond to GND to set to “0”,
No connection results to “default” setting
through internal pull-up.
OE_CTRL: Logical states defined by PECL levels if OE_SELECT is “1”
Logical states defined by CMOS levels if OE_SELECT is “0”
OUTPUT FREQUENCY SELECTOR
S2
Output
0
1(Default)*
Input/2
Input
*Internally set to ‘Default’ through 60KΩ pull-up resistor
47745 Fremont Blvd., Fremont, California 94538 Tel [phone] Fax [phone] www.phaselink.com Rev 011/09/04 Page 1