9

02/16/2012

PI6C49014

Networking Clock Generator

C1

18pF

Crystal�(C

C2

18pF

XTAL_IN

XTAL_OUT

Application Notes

Crystal circuit connection

The following diagram shows PI6C49014 crystal circuit connection with a parallel crystal. For the CL=18pF crystal, it is suggested

to use C1= 18pF, C2= 18pF. C1 and C2 can be adjusted to fine tune to the target ppm of crystal oscillator according to different

board layouts.

Crystal Oscillator Circuit

HCSL output buffer characteristics

Figure 9. Simplified diagram of current-mode output buffer

HCSL Buffer characteristics

Symbol

Minimum

Maximum

3000Ω

N/A

unspecified

unspecified

N/A

950mV

0V

0.90V

Slope ~ 1/Rs

Iout

11-0146