ABX0235/37/38/39

750kHz – 800MHz Low Phase Noise Multiplier XO

Universal Low Phase Noise IC’s

30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 2

FREQUENCY SELECTION TABLE

SEL3

SEL2

SEL1

SEL0

Selected Multiplier

0

0

1

1

Fin x 32

0

1

1

0

Fin / 8

0

1

1

1

Fin x 2

1

0

0

1

Fin / 2

1

0

1

0

Fin / 16

1

0

1

1

Fin x 4

1

1

0

0

Fin / 4

1

1

0

1

Fin x 8

1

1

1

0

Fin x 16

1

1

1

1

No multiplication

Note: SEL0 is not available (always “1”) for ABX0235 and ABX0238 in 3x3mm package

PIN DESCRIPTIONS ABX0235 and ABX0238 (see next page of ABX0237/39)

Name

TSSOP

Pin number

3x3mm QFN

Pin number

Type

Description

XIN

2

12

I

Crystal input. See Crystal Specifications on page 3.

XOUT

3

13

I

Crystal output. See Crystal Specifications on page 3.

OE

6

16

I

Output enable pin (see OE logic state table on page 1).

GND

7,8,9,10,14

1,2,3,4,8,11

P

Ground.

CLKT

11

5

O

True output PECL

CLKC

13

7

O

Complementary output PECL.

SEL0

16

Not available

I

SEL1

15

9

I

SEL2

5

15

I

SEL3

4

14

I

Multiplier selector pins. These pins have an internal pull-up

that will default SEL to ‘1’ when not connected to GND.

VDD

1, 12

6,10

P

Power Supply.