PL602-35/-37/-38/-39

750kHz

– 800MHz Low Phase Noise Multiplier XO

Universal Low Phase Noise IC’s

FEATURES

 Selectable 750kHz to 800MHz range.



Low phase noise output

 -127dBc/Hz for 155.52MHz @ 10kHz offset

 -115dBc/Hz for 622.08MHz @ 10kHz offset

 LVCMOS (PL602-37), LVPECL (PL602-35 and

PL602-38) or LVDS (PL602-39) output.

 12MHz to 25MHz crystal input.

 No external crystal load capacitors required.

 Output Enable selector.

 Selectable /16 to x32 frequency divider/multiplier.

 3.3V operation.

 Available in 16-Pin TSSOP or 16-pin 3x3mm QFN

GREEN/RoHS compliant packages.

DESCRIPTION

The PL602-35 (LVPECL with inverted OE), PL602-37

(LVCMOS), PL602-38 (LVPECL), and PL602-39

(LVDS) are high performance and low phase noise XO

IC chips. They provide phase noise performance as

low as –127dBc at 10kHz offset (at 155MHz), by multi-

plying the input crystal frequency up to 32x. The very

low jitter makes them ideal for a wide range of applica-

tions, including SONET/SDH and FEC. They accept

fundamental parallel resonant mode crystals from

12MHz to 25MHz.

BLOCK DIAGRAM

PIN CONFIGURATION

(Top View)

^: Internal pull-up

*: On QFN package, PL602-35/-38 do not have SEL0 available: Pin 10

is VDD, pin 11 is GND. However, PL602-37/-39 have SEL0 (pin 10),

and pin11 is VDD. See pin assignment table for details.

Note: On QFN package there is a large center pad for thermal relief.

This pad needs to be connected to GND.

OUTPUT ENABLE LOGICAL LEVELS

Part #

OE

State

PL602-38

0 (Default) Output enabled

1

Tri-state

PL602-35

PL602-37

PL602-39

0

Tri-state

1 (Default) Output enabled

OE input: Logical states defined by LVPECL levels for PL602-38

Logical states defined by LVCMOS levels for PL602-37/-39

1

2

3

4

5

6

7

8

VDD

9

1

0

1

1

1

2

1

3

1

4

1

5

1

6

XIN

XOUT

SEL3^

SEL2^

OE

GND

GND

SEL0^

SEL1^

GND

CLKC

VDD

CLKT

GND

GND

TSSOP-16L

PL602-3x

1

2

3

4

12

11

10

9

13

14

15

16

8

7

6

5

SEL3^

XOUT

SEL2^

OE

VDD

CLKT

CLKC

GND

QFN-16L

XIN

XOUT

OE

CLKT

PL602-3x

CLKC

PLL by-pass

SEL[3:0]

PLL

(Phase

Locked

Loop)

Oscillator

Amplifier

w/

integrated

load cap.