GENERAL DESCRIPTION

The 843003i-01 is a 3 differential output LVPECL Synthesizer

designed to generate Ethernet reference clock frequencies. Using

a 19.53125MHz or 25MHz, 18pF parallel resonant crystal, the

following frequencies can be generated based on the settings

of 4 frequency select pins (DIV_SEL[A1:A0], DIV_SEL[B1:B0]):

625MHz, 312.5MHz, 156.25MHz, and 125MHz. The 843003I-01

has 2 output banks, Bank A with 1 differential LVPECL output pair

and Bank B with 2 differential LVPECL output pairs.

The two banks have their own dedicated frequency select pins and

can be independently set for the frequencies mentioned above.

The 843003i-01 uses ICS’ 3rd generation low phase noise VCO

technology and can achieve 1ps or lower typical rms phase jitter,

easily meeting Ethernet jitter requirements. The 843003i-01 is

packaged in a small 24-pin TSSOP package.

FEATURES

• Three 3.3V LVPECL outputs on two banks, A Bank with one

LVPECL pair and B Bank with two LVPECL output pairs

• Using a 19.53125MHz or 25MHz crystal, the two output banks

can be independently set for 625MHz, 312.5MHz, 156.25MHz

or 125MHz

• Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input

• VCO range: 490MHz to 680MHz

• RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz):

0.53ps (typical)

• 3.3V output supply mode

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

• Available in lead-free RoHS compliant package