Preliminary

PLL520-70

CMOS Low Phase Noise VCXO (for 45-90MHz Fund Xtal)

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 8/26/02 Page 1

FEATURES

• 45MHz to 90MHz Fundamental Mode Crystal.

• Output range: 45MHz – 90MHz (no PLL).

• CMOS outputs.

• Integrated variable capacitors.

• Supports 3.3V-Power Supply.

• Available in die form.

• Thickness 10 mil.

DESCRIPTIONS

PLL520-70 is a VCXO IC specifically designed to

pull frequency fundamental crystals from 45MHz to

90MHz, with CMOS outputs. 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

DRIVE_SEL AND OE_CTRL TABLE

Pad #19

DRIVE_SEL

Output Drive

0

High Drive CMOS

1

Standard CMOS (default)

Pad #30

OE_CTRL

State

0

Tri-state

1

Output enabled (default)

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

4

5

27

28

30

X+

X-

OE

Q

PLL520-70

Amplifier

w/

integrated

varicaps