GENERAL DESCRIPTION

The 843004I-04 is a 4 output LVPECL Synthesizer optimized

to generate clock frequencies for a variety of high performance

applications. This device can select its input reference clock

from either a crystal input or a single-ended clock signal. It can

be confi gured to generate 4 outputs with individually selectable

divide-by-one or divide-by-four function via the 4 frequency

select pins (F_SEL[3:0]). The 843004I-04 uses IDT’s 3rd

generation low phase noise VCO technology and can achieve

1ps or lower typical rms phase jitter. This ensures that it will

easily meet clocking requirements for SDH (STM-1/STM-4/STM16) and SONET (OC-3/OC12/OC-48). This device is suitable for

multi-rate and multiple port line card applications. The 843004I04 is conveniently packaged in a small 24-pin TSSOP package.

FEATURES

• Four LVPECL outputs

• Selectable crystal oscillator interface

or LVCMOS/LVTTL single-ended input

• Supports the following applications: SONET/SDH, SATA,

or 10Gb Ethernet

• Output frequency range: 140MHz - 170MHz,

560MHz - 680MHz

• VCO range: 560MHz - 680MHz

• Crystal oscillator and CLK range: 17.5MHz - 21.25MHz

• RMS phase jitter @ 622.08MHz output, using a 19.44MHz

crystal (12kHz - 20MHz): 0.82ps (typical)

• RMS phase jitter @ 156.25MHz output, using a 19.53125MHz

crystal (1.875MHz - 20MHz): 0.57ps (typical)

• RMS phase jitter @ 155.52MHz output, using a 19.44MHz

crystal (12kHz - 20MHz): 0.94ps (typical)

• Full 3.3V supply mode

• -40°C to 85°C ambient operating temperature

• Available in lead-free RoHS compliant package