XECOM XE0055T2, XE0055T1, XE0055S2, XE0055S1 Datasheet

xecom

XE0055S & XE0055T

1-11-96

Minature V.34 Telephone Line Interface

Description

The XE0055S and XE0055T are very slim telephone interface modules. They support V.34 communications at 28,800 bps, yet are no more than 0.290 inches thick and comply with FCC Part 68 Rules for connection to the public telephone network.

The XE0055S and XE0055T differ only in their Ring Indicate outputs. The XE0055S provides an integrated RI output. It remains low while ring is present. The XE0055T's RI output is not integrated. It provides a pulse train at twice the ring frequency.

Xecom offers two mechanical variations of the XE0055S and XE0055T. The XE0055S1 and XE0055T1 mount vertically to consume minimal board space. The XE0055S2 and XE0055T2 mount horizontally for

the lowest possible profile. Both versions have the same pin out and are electrically identical.

The XE0055S operates from a single power supply from +3 to +5 Volts. As with all Xecom telephone interface modules, internal ring indication and switch hook are provided.

Features

*Small Size:

XE0055S1/T1 1.5" by 0.5" by 0.280"; XE0055S2/T2 1.5" by 0.5" by 0.230";

*V.34 compatible for data transfer to

28,800 bps;

*FCC Part 68 Compliant;

*Pin compatible replacement for Xecom's XE0054SIP

*Ring Detection;

*Single Power Supply, 3 to 5 Volts;

*Hookswitch Control

*Two Mechanical Variations XE0055S1/T1 Vertical Mount XE0055S2/T2 - Horizontal Mount

Block Diagram

XE0055S & XE0055T

Mechanical Specifications

XE0055S1 & XE0055T1

		Inches		Millimeters
	Dim	Min	Max	Min	Max
	A	0.270	0.290	6.86	7.37
	B	0.490	0.510	12.45	12.95
	C	1.490	1.510	37.85	38.35
	D	0.040	0.060	1.02	1.52
	E	1.390	1.410	35.31	35.81
	F	0.090	0.110	2.29	2.79
	G	0.790	0.810	20.07	20.57	Pin Size: 0.025" by 0.025"
	H	0.125	0.200	4.19	5.08
						Recommended hole size: 0.056"
	I	0.260	0.280	6.60	7.11

XE0055S2 & XE0055T2

		Inches		Millimeters
	Dim	Min	Max	Min	Max
	A	0.490	0.510	12.45	12.95
	B	0.225	0.235	5.72	5.97
	C	1.490	1.510	37.85	38.35
	D	0.040	0.060	1.02	1.52
	E	1.390	1.410	35.31	35.81
	F	0.090	0.110	2.29	2.79	Pin Size: 0.025" by 0.025"
	G	0.790	0.810	20.07	20.57
						Recommended hole size: 0.056"
	H	0.125	0.200	3.18	5.08
	I	0.440	0.460	11.18	11.68

XE0055S&T

XECOM/2

Pin Descriptions

Pin Name Description

1	Ring	Ring is one of two signals which form
		the telephone network connection
		(RJ11 Pin 4). This device is not
		sensitive to the polarity of the battery
		voltage on the telephone line. Ring
		has 1500 volts isolation from the rest
		of the circuitry. This isolation must
		be preserved throughout the system.
2	Tip	Tip provides the second connection
		to the telephone network (RJ11 Pin
		3). Tip has 1500 volts isolation from
		the rest of the circuitry. This isolation
		must be preserved throughout the
		system.
3	OH	Hook-switch relay control. A high on
		OH closes the internal relay and
		connects the equipment to the
		telephone line.

PIN CONFIGURATION

XE0055S & XE0055T

1 o Ring

2 o Tip

(top view)

3 o OH

4 o T1

5 o Gnd

6 o VCC

7 o T2

8 o /RI

4	T1	T1 connects directly to the secondary side of the XE0055S telephone line
		transformer.
5	GND	This signal is used as common reference for all of the control signals in the
		XE0055S. Signals on T1 and T2 are not referenced to ground.
6	VCC	VCC provides the power source for the hook-switch control. The XE0055S
		will operate with VCC equal to 3 to 5 volts
7	T2	T2 connects directly to the secondary side of the telephone line transformer of
		the XE0055S
8	/RI	Ring Indicate, output, active low TTL. Ri goes low on the XE0055S with each
		ring and remains low as long as the ring is present on the telephone line.
		The XE0055T RI output provides a pulse at twice the Ring Frequency.

3/XECOM

XE0055S&T