XRT8010

312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS

NOVEMBER 2003

REV. 1.0.2

DESCRIPTION

The XRT8010 is a monolithic analog phase locked

loop that provides a high frequency LVDS clock

output, using a low frequency crystal or reference

clock. It is designed for SONET/SDH and other low

jitter applications.The high performance of the IC

provides a very low jitter LVDS clock output up to 320

MHz, while operating at 3.3 volts. The XRT8010 has

a selectable 8x or 16x internal multiplier for an

external crystal or signal source. The Output Enable

pin provides a true disconnect for the LVDS output.

The very compact (4 x 4 mm) low inductance

package is ideal for high frequency operation.

APPLICATIONS

s

Computer

s

Telecommunications Sytems

FEATURES

s

Telcordia GR-253-CORE for OC-3.

s

Optimized for 15 to 40 MHz crystals

s

Uses parallel fundamental mode

(2001)

O

GN D

FS 1

OE

AG N D

PD

AG ND

(C ry stal)

FS 0

AG N D

15-40 M H z

Crys tal

XTAL1

XTAL2

O sc illator

Circuit &

Input B uffer

VC O

C alibration Logic

P has e

Detec tor

C harge

Pum p

Loop

Filter

VC O

Selectable

Div ider

LV D S O utput

F eedbac k D iv ider

V oltage R eferenc e

&

B ias G enerator

R

EX T

10k

Ω

AV

DD

AV

DD

OV

DD

+3.3V

12 - 2 0 p F

12 - 2 0 p F

X R T 801 0

OU TP

OU TN