PLL520-38/-39

PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 09/20/04 Page 1

FEATURES

• 65MHz to 130MHz Fundamental Mode Crystal.

• Output range: 65MHz – 130MHz (no PLL).

• Low Injection Power for crystal 50uW.

• PECL (PLL520-38) or LVDS output (PLL520-39).

• Integrated variable capacitors.

• Supports 2.5V or 3.3V-Power Supply.

• Available in 16-Pin (TSSOP or 3x3 QFN).

DESCRIPTION

The PLL520-38/-39 is a family of VCXO IC’s

specifically designed to pull high frequency

fundamental crystals from 65MHz to 130MHz, with

selectable PECL or LVDS outputs.. They achieve

very low current into the crystal resulting in better

overall stability. Their internal varicaps allow an on

chip frequency pulling, controlled by the VCON

input. Their very low jitter makes them ideal for the

most demanding timing requirements.

BLOCK DIAGRAM

PIN CONFIGURATION

OUTPUT ENABLE LOGICAL LEVELS

Part #

OE

State

0

(Default)

Output enabled

PLL520-38

1

Tri-state

0

Tri-state

PLL520-39

1

(Default)

Output enabled

OE input: Logical states defined by PECL levels for PLL520-38

Logical states defined by CMOS levels for PLL520-39

1

2

3

4

5

6

7

8

VDD

9

10

11

12

13

14

15

16

XIN

XOUT

N/C

N/C

OE

VCON

GND

N/C

N/C

GND

CLKC

VDD

CLKT

N/C

N/C

XIN

XOUT

OE

Q

PLL520-38/-39

VCON

Q

Oscillator

Amplifier

w/

integrated

varicaps

P520-3x

GND

VDD

CLKT

CLKC

XOUT

XIN

N/C

OE

4

16

15

14

13

12

11

10

9

8

7

6

5

12

3