DATA SHEET

700MHZ, Low Jitter, Crystal-to-3.3V

LVPECL Frequency Synthesizer

84329B

84329B REVISION B 07/29/14

1

©2014 Integrated Device Technology, Inc.

General Description

The 84329B is a general purpose, single output high frequency

synthesizer. The VCO operates at a frequency range of 250MHz to

700MHz. The VCO frequency is programmed in steps equal to the

value of the crystal frequency divided by 16. The VCO and output

frequency can be programmed using the serial or parallel interfaces

to the configuration logic. The output can be configured to divide the

VCO frequency by 1, 2, 4, and 8. Output frequency steps as small as

125kHz to 1MHz can be achieved using a 16MHz crystal depending

on the output dividers.

Features

• Fully integrated PLL, no external loop filter requirements

• One differential 3.3V LVPECL output

• Parallel resonant crystal oscillator interface

• Output frequency range: 31.25MHz – 700MHz

• VCO range: 250MHz – 700MHz

• Parallel interface for programming counter and output dividers

during power-up

• Serial 3 wire interface

• RMS period jitter: 5.5ps (maximum)

• Cycle-to-cycle jitter: 35ps (maximum)

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Lead-free (RoHS 6) packaging

Block Diagram

Pin Assignments

FOUT

nFOUT

OSC

XTAL_IN

XTAL_OUT

S_LOAD

OE

S_DATA

S_CLOCK

nP_LOAD

M0:M8

N0:N1

VCO

PLL

TEST

CONFIGURATION

INTERFACE

LOGIC

÷M

÷16

PHASE DETECTOR

÷1

÷2

÷4

÷8

1

0

910 11 12 13 14 15 16

32 31 30

29 28

27 26 25

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

S_CLOCK

S_DATA

S_LOAD

VCCA

VCCA

nc

nc

XTAL_IN

nc

N1

N0

M8

M7

M6

M5

M4

84329B

32-Lead LQFP

7mm x 7mm x 1.4mm

package body

Y Package

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