Datasheet

www.ti.com
Output Pair Disabled
n-PORT REPEATER
DESTINATION
EQUIPMENT/
BOARD #1
DESTINATION
EQUIPMENT/
BOARD #2
DESTINATION
EQUIPMENT/
BOARD #n
SOURCE
EQUIPMENT/
BOARD
INPUT LEVEL TRANSLATION
V
DD
50 Ω
25 Ω
50
Ω
A
B
1/2 V
DD
0.1 µF
LVDS Receiver
SN65LVDS108
SLLS399E – NOVEMBER 1999 – REVISED FEBRUARY 2005
APPLICATION INFORMATION (continued)
The enable inputs provided for each output may be used to turn on or off any of the paths. This function is
required to prevent radiation of signals from the unterminated signal lines on open connectors when boards or
devices are being swapped in the end equipment. The individual channel enables are also required if redundant
paths are being utilized for reliability reasons.
The following diagram shows how an input signal is being identically repeated out two of the available outputs. A
third output is shown in the disabled state.
Figure 13. LVDS Repeating Splitter Application Example Showing Individual Path Control
An LVDS receiver can be used to receive various other types of logic signals. Figure 14 through Figure 22 show
the termination circuits for SSTL, HSTL, CTT, GTL, BTL, LVPECL, PECL, CMOS, and TTL.
Figure 14. Stub-Series Terminated (SSTL) or High-Speed Transceiver Logic (HSTL)
11