(Preliminary)

PL580-68/69

320-640MHz Low Phase Noise VCXO

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 11/28/05 Page 1

FEATURES

• Less than 0.4ps RMS (12KHz-20MHz) phase

• Low phase noise output (@ 1MHz frequency

offset

∗ -140dBc/Hz for 320.0MHz,

∗ -131dBC/Hz for 622.08MHz

• 20MHz-40MHz crystal input.

• 320MHz-640MHz output.

• Available in PECL, or LVDS outputs.

• No external varicap required.

• Output Enable selector.

• Wide pull range (+/-200ppm).

• 3.3V operation.

• Available in 3x3 QFN or 16-pin TSSOP

packages.

DESCRIPTION

The PL580-6X is a monolithic low jitter and low

phase noise VCXO, capable of 0.4ps RMS phase

jitter and PECL or LVDS outputs, covering a wide

frequency output range up to 640MHz. It allows the

control of the output frequency with an input voltage

(VCON), using a low cost crystal.

The PL580-6X is designed to address the

demanding requirements of high performance

applications such as SONET, GPS, Video, etc.

BLOCK DIAGRAM

PACKAGE PIN ASSIGNMENT

Note1: ^ Denotes internal pull up resistor.

Phase

Detector

Charge

Pump

Loop

Filter

VCO

VCO

Divider

XTAL

OSC

QBAR

OE

XIN

XOUT

Q

VCON

VARICAP

+

Performance Tuner

Output

Divider

1

2

3

4

5

6

7

8

VDDANA

9

10

11

12

13

14

15

16

XIN

XOUT

SEL2^

OE_CTRL

VCON

GNDANA

LP

SEL0^

GNDBUF

SEL1^

GNDBUF

QBAR

VDDBUF

Q

LM

PL580-6X

GNDBUF

VDDBUF

Q

QBAR

DNC

XOUT

OE_CTRL

VCON

4

16

15

14

13

12

11

10

9

8

7

6

5

12

3