Preliminary

PLL520-20

Low Phase Noise VCXO (for 100-200MHz Fundamental Crystals)

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 www.phaselink.com Rev 03/03/05 Page 1

FEATURES

• 100MHz to 200MHz Fundamental Mode Crystal.

• Output range: 100MHz – 200MHz (no PLL).

• Low Injection Power for crystal 50uW.

• Complementary outputs: CMOS, PECL or LVDS.

• Selectable OE Logic (enable high or enable low).

• Integrated variable capacitors.

• Supports 2.5V or 3.3V-Power Supply.

• Available in die form.

• Die thickness is 10 mil.

DESCRIPTIONS

PLL520-20 is a VCXO IC specifically designed to

pull high frequency fundamental crystals. Its design

was optimized to tolerate higher limits of

interelectrodes capacitance and bonding

capacitance to improve yield. It achieves very low

current into the crystal resulting in better overall

stability. Its internal varicaps allow an on chip

frequency pulling, controlled by the VCON input.

BLOCK DIAGRAM

DIE CONFIGURATION

DIE SPECIFICATIONS

Name

Value

Size

62 x 65 mil

Reverse side

GND

Pad dimensions

80 micron x 80 micron

Thickness

10 mil

OUTPUT SELECTION AND ENABLE

Pad #18

OUTSEL1

Pad #25

OUTSEL0

Selected Output

0

0

High Drive CMOS

0

1

Standard CMOS

1

0

LVDS

1

1

PECL (default)

OE_SELECT

(Pad #9)

OE_CTRL

(Pad #30)

State

0

Tri-state

0

1 (Default)

Output enabled

0 (Default)

Output enabled

1 (Default)

1

Tri-state

Pad #9, 18, 25: Bond to GND to set to “0”, bond to VDD to set to “1”

No connection results to “default” setting through internal pull-up/-down.

Pad #30: Logical states defined by PECL levels if OE_SELECT (pad #9) is “1”

Logical states defined by CMOS levels if OE_SELECT is “0”

X+

X-

OE

Q

PLL520-20

VCON

Q

Oscillator

Amplifier

w/

integrated

varicaps

18

19

20

21

23

25

7

13

10

26

29

31

Y

X

(0,0)

(1550,1475)

65 mil

24

22

17

16

15

14

12

11

9

8

6

1

2

3

45

27

28

30

OUTSEL^

PECL

LVDS

VDDBUF

VDDBUF

PECLB

LVDSB

N/C

GNDBUF

XIN

XOUT

VCON

OE

CTRL

DNC

DNC

Die ID:

A1919-19B

C502A