XRT4500 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT4500' PDF : 96 Pages View PDF
XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.5
áç
PIN DESCRIPTIONS
PIN
Signal
#
78
RX1A
79
RX1B
80 EN_TERM
DTE
MODE
RXDA
RXDB
DCE
MODE
TXDA
TXDB
TYPE FUNCTION
I Receiver 1 – Negative Data Differential Input from Line
I Receiver 1 – Positive Data Differential Input from Line
The exact function of this input pin depends upon whether the
XRT4500 is operating in the DCE or DTE Mode. This input pin,
along with “RX1A” (pin 78) will accept a line signal in either the
V.35, V.11, V.28/EIA-232 or V.10 electrical format. Receiver 1 will
then convert this line signal into a CMOS level binary data
stream, and will output this data (to the Terminal Equipment) via
the “RX1D” output pin (pin 1).
DCE Mode – Receive Data (RXD) – Negative Polarity Input
Line Signal
I Enable Input Termination for Receiver 1, 2, 3, in V.11 Mode.
Internal 20kΩ pull-down to ground.
25
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