DESCRIPTION

· The SiT92211 is a 2.1 GHz, 10-output low-jitter clock fan-out buffer designed for high-frequency clock/data distribution and level translation.
· It supports primary, secondary, or crystal clock inputs, with primary and secondary sources accepting single-ended or differential signals.
· The selected clock is distributed to two output banks (A, B) and one LVCMOS output, with crystal input supporting 8 MHz to 50 MHz.
· Output drivers can be independently programmed to LVPECL, LVDS, HCSL, or HIZ mode, and the LVCMOS output can be glitch-free enabled/disabled.
· Operates with a 3.3 V/2.5 V core supply and three independent 3.3 V/2.5 V output supplies, with LVCMOS driver supporting 1.8 V.

FEATURES

· Ultra-low additive jitter of 55 fs RMS.
· 3:1 input clock selection with universal inputs supporting LVPECL, LVDS, LVCMOS, CML (AC-coupled), HCSL, SSTL, or single-ended clocks up to 2.1 GHz.
· Crystal input supports 8 MHz to 50 MHz or single-ended clock.
· Two output banks (A, B) programmable to LVPECL, LVDS, HCSL, or HIZ mode.
· Typical output skew of 30 ps between clock outputs.
· Level translation with 3.3 V/2.5 V core and output supplies for differential drivers.
· LVCMOS output driver supports 3.3 V, 2.5 V, or 1.8 V operation.
· High PSRR of -70/-73 dBc for LVPECL/LVDS modes.
· Available in a 48-pin, 7mm x 7mm QFN package.
· Supports PCI-e Gen1 to Gen5.

APPLICATIONS

· High-frequency clock and data distribution systems.
· Level translation in mixed-voltage environments.
· Low-jitter clock generation for PCI-e Gen1 to Gen5 applications.
· Crystal-based clock sources in the 8 MHz to 50 MHz range.
· Systems requiring multiple output formats (LVPECL, LVDS, HCSL, LVCMOS).