OCX160 Datasheet, PDF (23/44 Pages) List of Unclassifed Manufacturers – OCX160 Crosspoint Switch

OCX160 Crosspoint Switch—Preliminary Data Sheet
3.2 LVPECL
LVPECL is another differential signaling standard that specifies two pins per input or output. The voltage
swing between these two signal lines is approximately 850 mV. The use of a reference voltage or a board
termination voltage is not required. The LVPECL standard requires external resistor termination.
Transmitting and receiving circuits for LVPECL are shown in Figures 9 and 10.
OCX
Device
3.3V
OUTP ^RS
100
Data
RDIV
Transmit
187
VDD.PAD=3.3V
LVPECL Output
R_S
OUTN 100
Z0=50Ω
Z0=50Ω
to LVPECL
Receiver
to LVPECL
Receiver
Figure 9 Transmitting LVPECL Signal Circuit
Z0=50Ω
from
LVPECL
Driver
Z0=50Ω
INP
R_T
100
INN
OCX
Device
+
Data
–
Recieve
Figure 10 Receiving LVPECL Signal Circuit
I-Cube, Inc.
[Rev. 1.6] 2/20/01
23