XRT4500 データシートの表示（PDF） - Exar Corporation

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XRT4500

MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

Exar Corporation 

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PIN DESCRIPTIONS (CONT.)

XRT4500

MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

REV. 1.0.5

PIN

Signal

#

11

TX4A

12

TX5A

13

TX5B

DTE

MODE

RTSA

DTRA

DTRB

DCE

MODE

CTSA

TYPE FUNCTION

O Transmitter 4 – Negative Data Differential Output to Line

The XRT4500 accepts a TTL binary data stream from the Terminal

Equipment via the TX4D (pin 8) input pin. The XRT4500 will convert

this data into either the V.10, V.11 or V.28 modes, and will output it

via this pin and TX4B (pin 10). The exact function of this output pin

depends upon whether the XRT4500 device is operating in the

DTE or DCE mode.

DTE Mode – Negative Polarity portion of the RTS Line Signal.

DCE Mode – Negative Polarity portion of the CTS Line Signal.

DSRA

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.

O Transmitter 5 – Negative Data Differential Output to Line

The XRT4500 accepts a TTL binary data stream via the TX5D (pin

15) input pin. The XRT4500 will convert this data into either the

V.10, V.11 or V.28 modes, and will output it via this pin and TX5B

(pin 13). The exact function of this output pin depends upon

whether the XRT4500 device is operating in the DTE or DCE mode.

DTE Mode – Negative Polarity portion of the DTR Line Signal.

Transmitter 5 accepts a TTL level binary data stream (as the

Data Terminal Read – DTR) from the terminal equipment.

DCE Mode – Negative Polarity portion of the DSR Line Signal.

DSRB

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.

O Transmitter 5 – Positive Data Differential Output to Line

The XRT4500 accepts a TTL binary data stream via the TX5D (pin

15) input pin. The XRT4500 will convert this data into either the

V.10, V.11 or V.28 modes, and will output it via this pin and TX5A

(pin 12). The exact function of this output pin depends upon

whether the XRT4500 device is operating in the DTE or DCE mode.

14

GND

DTE Mode – Positive Polarity portion of DTR Line signal.

DCE Mode – Positive Polarity portion of DSR Line signal.

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.

Analog GND – For Transmitters 4, 5, 6, 7, and 8.

6

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