Si5321 - Silicon Laboratories

Si5321 SONET/SDH PRECISION CLOCK MULTIPLIER IC

The Si5321 is a precision clock multiplier that exceeds the requirements of high-speed communication systems, including OC-192/OC-48 and 10 Gigabit Ethernet. This device phase locks to an input clock in the 19, 39, 78, 155, 311 or 622 MHz frequency range and generates a frequency-multiplied clock output that can be configured for operation in the 19, 39, 78.

Features

 Ultra-low jitter clock output with jitter
 Digital hold for loss-of-input clock generation as low as 0.3 psRMS
 Support for 255/238 (15/14),
 No external components (other than a 255/237 (85/79), and 66/64 FEC scaling resistor and bypassing) (ITU-T G.709 and IEEE 802.3ae)
 Input clock ranges at 19, 39, 78, 155,
 Selectable loop bandwidth 311, or 622 MHz
 Loss-of-signal alarm output
 Output clock ranges at 19, 39, 78, 155,
 Low power 311, 622, 1244, or 2488 MHz
 Small size (9 x 9 mm)
 Maximum range includes 693 MHz for
 Backwards compatible with Si5320 10 GbE FEC supp.