SM803020 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – Flexible Ultra-Low Jitter Clock Synthesizer

SM803020
Flexible Ultra-Low Jitter Clock Synthesizer
General Description
The SM803020 is a dual-PLL clock generator that
achieves ultra-low, 74.2fs_rms output jitter at 156.25MHz
output frequency. It accepts a crystal input or a reference
input.
Each output channel is individually configurable to a
differential PECL, LVDS, HCSL, or CMOS output logic
level. PECL is selected by default, but can be overridden
through SPI. It is packaged in a dual-row 84-pin
7mm x 7mm package.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Typical Application
Features
• Generates twelve 156.25MHz outputs
• Independently programmable output logic:
− Output logic: LVPECL (default), LVDS, HCSL,
LVCMOS
• 74.2fs jitter at 156.25MHz (1.875MHz to 20MHz)
• Selectable inputs require 39.0625MHz input frequency
− XTAL (default)
− Differential or single-ended reference clock (SPI
selectable)
• 2.5V or 3.3V operating power supply
• Separate output power supplies:
− Different banks can be at different levels
• Industrial temperature range (–40°C to +85°C)
• Green, RoHS, and PFOS compliant
• Available in 84-pin 7mm × 7mm QFN package
Applications
• 1/10/40/100 Gigabit Ethernet
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 22, 2013
Revision 1.0
[e-mail] or [phone]