XRT4500 Datasheet, PDF (17/99 Pages) Exar Corporation – MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
PIN DESCRIPTIONS (CONT.)
áç
PIN
Signal
#
35
RX5B
36
RX5A
37
RX4A
38
RX4B
DTE
MODE
DSRB
DSRA
CTSA
CTSB
DCE
MODE
DTRB
TYPE FUNCTION
I Receiver 5 – Positive Data Differential Input from Line
The XRT4500 will accept either a V.10, V.11 or V.28 type signal via
this input pin, along with RX5A (Pin 36) and will generate a result-
ing CMOS level binary data stream, via the RX5D (Pin 33) output
pin. The exact function of this input pin depends upon whether the
XRT4500 device is operating in the DTE or DCE mode.
DTE Mode – Positive polarity portion of the DSR line signal.
DCE Mode – Positive polarity portion of the DTR line signal.
DTRA
Note: This output pin is not used if the XRT4500 has been con-
figured to operate in either the V.28/EIA-232 or V.10 Modes.
I Receiver 5 – Negative Data Differential Input from Line
The XRT4500 will accept either a V.10, V.11 or V.28 type signal
via this input pin, along with RX5B (pin 35) and will generate a
resulting CMOS level binary data stream, via the RX5D (Pin 33)
output pin. The exact function of this input pin depends upon
whether the XRT4500 device is operating in the DTE or DCE
mode.
DTE Mode – Negative polarity portion of the DSR line signal.
DCE Mode – Negative polarity portion of the DTR line signal.
RTSA
RTSB
Note: If the XRT4500 has been configured to operate in either
the V.28/EIA-232 or V.10 Modes, then all of the data will be out-
put (to the line) in a single-rail manner via this output pin.
I Receiver 4 – Negative Data Differential Input from Line
The XRT4500 will accept either a V.10, V.11 or V.28 type signal
via this input pin, along with RX4B (pin 38) and will generate a
resulting CMOS level binary data stream, via the RX4D output
pin (Pin 40). The exact function of this input pin depends upon
whether the XRT4500 device is operating in the DTE or DCE
mode.
Note: If the XRT4500 has been configured to operate in either
the V.28/EIA-232 or V.10 Modes, then all of the data will be out-
put (to the line) in a single-rail manner via this output pin.
I Receiver 4 – Positive Data Differential Input from Line
The XRT4500 will accept either a V.10, V.11 or V.28 type signal
via this input pin, along with RX4A (pin 37) and will generate a
resulting CMOS level binary data stream, via the RX4D output
pin (Pin 40). The exact function of this input pin depends upon
whether the XRT4500 device is operating in the DTE or DCE
mode.
NOTE: This output pin is not used if the XRT4500 has been con-
figured to operate in either the V.28/EIA-232 or V.10 Modes.
NOTE: Signal names beginning with D_ are digital signals.
NOTE: Signal names ending with B and A are the positive
and negative polarities of differential signals respectively.
14