EQCO62R20.3 Datasheet, PDF (7/34 Pages) Microchip Technology – EQCO62R20.3 6.25 Gbps Asymmetric Coax Equalizer

EQCO62R20.3/EQCO31R20.3
1.2 Circuit Operation
FIGURE 1-3:
EQCO62R20.3 BLOCK DIAGRAM SHOWING ELECTRICAL CONNECTIONS
EQCO62R20.3
LF
LFI
Pre-
Driver
Active Signal
Splitter/Combiner
SDIp
SDIn
SDOp
SDOn
Equalizer
Core
RX Output
Driver
1.2.1 LF PRE-DRIVER
The uplink pre-driver converts the incoming LVTTL
signal at the LFI pin to a signal with well-controlled
amplitude and rise/fall times that will be transmitted
onto the cable by the active splitter/combiner.
1.2.2
ACTIVE SIGNAL SPLITTER/
COMBINER
The active splitter/combiner transmits the outgoing
coax signal via an internal 60Ω output termination
resistor. The total (60Ω + 15Ω) output resistor, when
balanced with the coax characteristic impedance, also
forms part of a hybrid splitter circuit which subtracts the
TX output from the signal on the SDI output to give yield
the far-end TX signal.
 2012-2016 Microchip Technology Inc.
DS60001302B-page 7