Figure 5.2. Differential Clock Input Terminations
In addition, the Si5383-EVB supports two SMA connectors (IN3, IN4) for receiving external single-ended LVCMOS clocks, such as PPS
inputs. Each of these clocks connects to its respective Si5383 pins via a single installed 0 Ω resistor with a 4.7 K Ω pull down resistor.
Alternatively, R217, R218, R219, R220, C139, and C140 can be modified such as to attenuate a 5V swing.
Figure 5.3. IN3 and IN4, CMOS Input Terminations
UG256: Si5383 Evaluation Board User's Guide
Clock Input and Output Circuits
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