Description

The 843001-21 is a a highly versatile, low phase noise LVPECL

Synthesizer which can generate low jitter reference clocks for a

variety of communications applications. The dual crystal interface

allows the synthesizer to support up to two communications

standards in a given application (i.e. 1GB Ethernet with a 25MHz

crystal and 1Gb Fibre Channel using a 26.5625MHz crystal). The

rms phase jitter performance is typically less than 1ps, thus

making the device acceptable for use in demanding applications

such as OC48 SONET and 10Gb Ethernet. The 843001-21 is

packaged in a small 24-pin TSSOP package.

Features

• One 3.3Vdifferential LVPECL output pair and

one LVCMOS/LVTTL single-ended reference clock output

• Selectable crystal oscillator interface

or LVCMOS/LVTTL single-ended input

• VCO range: 560MHz – 700MHz

• Supports the following applications:

SONET, Ethernet, Fibre Channel, Serial ATA, and HDTV

• Selectable ÷1 or ÷2 operation

• RMS phase jitter @ 622.08MHz (12kHz - 20MHz):

0.80ps (typical)

Offset Noise Power

100Hz ................ -60.3 dBc/Hz

1kHz .................. -88.5 dBc/Hz

10kHz ................ -111.9 dBc/Hz

100kHz .............. -113.0 dBc/Hz

• Full 3.3V supply mode

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package

• For drop in replacement use 843001i-22