XE0002D Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Fabricante

XE0002D

Modular DAA with 2/4 Wire Convertor

Unspecified 

XE0002D Pin Descriptions

Pin Name Description

1 VDD VDD supplies -5 Volt power to the XE0002D’s 2 to 4 wire converter.

2 VCC VCC supplies +5 Volts power to the XE0002D

3 /RI Ring Indicate, output, active low, TTL. /RI indicates the XE0002D is receiving a ring

signal. /RI remains low for the duration of each ring.

4 RCVR RCVR acts as the analog output from the XE0002D’s 2 to 4 wire converter. Signals

pass from the telephone line to the host via RCVR

5 XMIT XMIT provides the analog input to the XE0002D’s 2 to 4 wire converter. Signals

placed on XMIT are sent out onto the telephone line.

6 XFMR XFMR is provided to connect the internal 2 to 4 wire converter to the telephone line

transformer. A jumper is required from XFMR to T1 whenever the 2 to 4 wire circuit

is required.

7

T1

T1 is one of two direct connections to the internal telephone line transformer. T1

must be connected to the XE0002D XFMR lead to use the internal 2 to 4 wire

converter. If the 2 to 4 wire converter is not required, Signals for the telephone line

can be passed across T1 and T2.

8 OH Hookswitch relay control. A high on OH closes the internal relay and connects the

equipment to the telephone line.

9 Gnd Gnd provides the ground reference connection to the XE0002D.

10 T2

T2 is one of two direct connections to the internal telephone line transformer. T2

must be connected to Ground to use the internal 2 to 4 wire converter. If the 2 to 4

wire converter is not required, Signals for the telephone line can be passed across T1

and T2.

11-14

No Connection

17 Ring

Ring is one wire of the two-wire telephone line connection (RJ11 Pin 4). FCC Part

68 Rules require a 1500 volt isolation barrier between the telephone line and all other

circuits. This isolation must be preserved throughout the system. Xecom

recommends 0.100 inch spacing between traces connected to Ring and all other

conductors to preserve this isolation

20 Tip

Tip is one wire of the two-wire telephone line connection (RJ11 Pin 3). The

telephone company places a DC "Battery" voltage across Tip and Ring on all public

switched telephone lines. The XE0002D accept this line battery voltage without

regard to its polarity.

XECOM

(3)

XE0002D

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