SiT92113 Ultra Low Jitter Buffer Evaluation Kit User Guide
Table of Contents
1Introduction ......................................................................................................................................................................... 2
2Features.............................................................................................................................................................................. 2
3Functional Description......................................................................................................................................................... 3
3.1. VDD and VDDO Power Supplies.............................................................................................................................3
3.2. Clock Inputs.............................................................................................................................................................3
3.3. Clock States (Input vs Output States)......................................................................................................................3
3.4. Output Enable..........................................................................................................................................................4
4Power Supply Connections................................................................................................................................................. 4
5Setting Input Clock Select and Output Enable in the EVB................................................................................................... 6
6Input Clock Configuration.................................................................................................................................................... 7
7Configuring for Single ended AC coupled Input Clock ........................................................................................................ 8
7.1. Driving Clock Inputs with LVCMOS Driver (AC coupled).........................................................................................8
8Configuring EVB for DC Coupled Input LVCMOS Clock..................................................................................................... 9
8.1. Driving Clock Inputs with LVCMOS Driver (DC coupled).........................................................................................9
8.2. EVB Changes for Driving Clock Inputs with LVCMOS Driver (DC coupled, single ended)......................................9
9Driving Differential LVDS or LVDS Boost (AC coupled).................................................................................................... 11
10 Board Configuration for driving DC Coupled LVDS........................................................................................................... 12
10.1.LVDS (DC coupled) ............................................................................................................................................... 12
10.2.Board Changes Required for DC Coupled LVDS ..................................................................................................12
11 Board Configuration Required for Driving DC/AC coupled LVPECL ................................................................................. 13
11.1.DC/AC Coupled LVPECL.......................................................................................................................................13
12 EVB Snapshot................................................................................................................................................................... 14
13 PCB Schematic................................................................................................................................................................. 15
13.1.Schematic Sheet 1................................................................................................................................................. 15
13.2.Schematic Sheet 2................................................................................................................................................. 16
13.3.Schematic Sheet 3................................................................................................................................................. 17
13.4.Schematic Sheet 4................................................................................................................................................. 18
13.5.Schematic Sheet 5................................................................................................................................................. 19
13.6.Schematic Sheet 6................................................................................................................................................. 20
13.7.Schematic Sheet 7................................................................................................................................................. 21
13.8.Schematic Sheet 8................................................................................................................................................. 22
