Gigabit Ethernet Clock Synthesizer

Description

The ICS843021 is a Gigabit Ethernet Clock Generator and a member of the HiPerClocks™ family of high performance devices from IDT. The ICS843021 uses a 25MHz crystal to synthesize 125MHz. The ICS843021 has excellent phase jitter performance over the 1.875MHz – 20MHz integration range. The ICS843021 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

Features & Applications

• 1 differential 3.3V LVPECL output
• Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal
• Output frequency: 125MHz, using a 25MHz crystal
• VCO range: 490MHz - 640MHz
• RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.41ps (typical) (for 3.3V)
• Full 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature

Diagram

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Digi-Key P/N	Vendor P/N	Description	Voltage	Freq Max
800-1131-5-ND	ICS843001AGLF	IC CLK GEN FIBRE LVPECL 8-TSSOP	3.135V~3.465V	226.66MHz
800-1132-5-ND	ICS843021AGI-01LF	IC CLK GEN 1GIG LVPECL 8-TSSOP	2.375V~3.465V	160MHz
800-1133-5-ND	ICS843021AGLF	IC CLK GEN 1GIG LVPECL 8-TSSOP	2.97V~3.63V	140MHz
800-1134-5-ND	ICS843023AGILF	IC CLK GEN 1GIG LVPECL 8-TSSOP	3.135V~3.465V	320MHz
800-1135-5-ND	ICS843031AGLF	IC CLK GEN 1GIG LVPECL 8-TSSOP	3.135V~3.465V	350MHz
800-1136-5-ND	ICS843051AGLF	IC CLK GEN GIG ETH LVPECL 8TSSOP	3.135V~3.465V	161.13MHz