Micrel, Inc.
LVPECL Output
LVPECL outputs have very-low output impedance (open
emitter), and small signal swing which results in low EMI.
LVPECL is ideal for driving 50Ω- and 100Ω-controlled
impedance transmission lines. There are several
techniques in terminating the LVPECL output (Figures 4
through 6).
SY58021U
Figure 4. Parallel Termination-Thevenin Equivalent
Figure 5. Parallel Termination (3-Resistor)
September 2011
11
M9999-090111-B
hbwhelp@micrel.com or (408) 955-1690