OUT+

OUT-

ESD

STRUCTURES

Figure 4. LVPECL Output Stage

OUT+

OUT-

ESD

STRUCTURES

Figure 5. LVDS Output Stage

Applications Information

Low-Jitter 106.25MHz/212.5MHz Fibre-Channel

Clock Generator

6

_______________________________________________________________________________________

X1

X2

Figure 3. Equivalent Crystal Resonator Circuit Model

PARAMETER

VALUE

Crystal

Fundamental AT-cut

Nominal Oscillator Frequency

26.5625MHz

Shunt Capacitance (Co)

2pF

Co/Cs

280

Load Capacitance (Note 6)

12pF

Equivalent Series Resistance (ESR)

5Ω to 40Ω

Maximum Crystal Drive Level

500µW

Table 1. Crystal Resonator Specifications

Note 6: The load capacitance includes the oscillation-circuit

input capacitance, as well as the parasitic capacitance caused

from the assembling/packaging of the blank crystal and IC.