SiT6760EB UM Rev 1.0 | Preliminary
SiT6760EB Evaluation User Manual
Contents
1 Introduction ............................................................................................................................................. 1
2 Board Overview........................................................................................................................................ 1
3 Standard Shipping Configurations ........................................................................................................... 4
3.1 LVPECL, FlexSwing and LVDS Shipping Configuration...................................................................... 4
3.2 HCSL Shipping Configuration ........................................................................................................... 5
4 Phase Noise and Phase Jitter Measurement ........................................................................................... 7
Appendix A – Generic EVB Schematic*......................................................................................................... 8
Appendix B – Connector Ordering Codes ..................................................................................................... 9
Appendix C – Board View............................................................................................................................ 10
1Introduction
The SiT6760EB evaluation board (EVB) is a simple and easy to use tool that enables component-level
performance evaluation of SiTime SiT9501 and SiT937x differential oscillators. The EVB is shipped to
customers with the differential oscillator in 3.2 mm x 2.5 mm 6-pin QFN package mounted on the board.
The oscillator is factory pre-configured according to the ordering part number.
The SiT6760EB supports all output signal options of SiTime SiT9501 and SiT937x differential oscillators,
such as LVPECL, LVDS, HCSL, low-power HCSL and FlexSwing™. For more information about specific
signaling options please refer to the product datasheet.
2Board Overview
The SiT6760EB EVB is a 2 x 2 inch PCB (Figure 1). The only active device on the EVB is the SiTime
differential oscillator. The board contains input and output connectors described in Table 1, a power
supply bypass network (on the back side of the board) and a configurable universal differential output
termination network.
To improve signal integrity the configurable universal differential termination network is designed to
have minimum stubs and trace impedance mismatches. Since it contains a large variety of termination
configurations, some resistor placeholders are dual-purpose and can accommodate capacitors. For
example, R12 can be a 0-ohm resistor in one configuration and a 0.1-uF capacitor in another.
Section 3 describes configuration of the EVB at shipment.
The full detailed schematic is shown in Appendix A.
