Crystal-to-LVPECL/LVDS Clock Synthesizer
Description
Crystal-to-LVPECL/LVDS Clock Synthesizer
849S625
Data Sheet
General Description
Features
The 849S625 is a high frequency clock generator.
The 849S625 uses an external 25MHz crystal to synthesize 625MHz, 312.
5MHz, 156.
25MHz and 125MHz clocks.
The 849S625 has excellent cycle-to-cycle and RMS phase jitter performance.
The 849S625 operates at full 3.
3V supply mode and is available in a fully RoHS compliant 48-lead TQFP, E-Pad package.
Frequency Table for Bank A, B and C Outputs
• Ten selectable differential LVPECL or LVDS outputs • Output frequencies of 625MHz, 312.
5MHz, 156.
25MHz or
125MHz using a 25MHz crystal.
• Crystal interface designed for a 25MHz, parallel resonant crystal • Cycle-to-cycle jitter: 25ps (maximum) • RMS phase jitter at 156.
25MHz (1MHz - 20MHz):
0.
375ps (typical), LVDS outputs
• Output duty cycle: 53% (maximum) • Full 3.
3V supply mode • -40°C to 85°C ambient operating temperature • Available in lead-free (RoHS 6) packaging
Crystal Frequency (M...
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