XE0052S &XE0052T
5/99
Slim V.34 Telephone Line Interface with 2/4 Wire Hybrid
Description
The XE0052S and XE0052T are compact telephone in-
terface modules which support V.34 communications at
data rates to 33,600 bps yet are just 0.31 inches thick
and comply with FCC Part 68 Rules for connection to
the public telephone network.
The XE0052S and XE0052T are complete DAAs.
They include the 2-4 wire convertor to separate trans-
mit and receive signals, ring detection, and the switch
hook to control line access. The two models differ only
in their RI outputs. The XE0052S has an integrated RI
output which remains low for the duration of the ring.
The XE0052T RI output is not integrated and provides
a pulse train at twice the ring frequency.
Xecom offers two mechanical variations for each of the
XE0052S and XE0052T. The XE0052S1/T1 mount
vertically to consume minimal board space. The
XE0052S2/T2 mount horizontally to maintain a low
profile. Both versions are electrically identical and
share the same pin configuration.
Features
*
*
*
*
Small Size: just 1.5" by 0.5" by 0.32";
FCC Part 68 Compliant;
Internal 2-4 wire convertor separates transmit and
receive signals
Two Ring Detect Options;
XE0052S1/S2: - Continuous Low Level
XE0052T1/T2 - Ring Signal Pulses
Single +5V Operation;
Hookswitch Control
Compatible with V.34 data transfer
Two Mechanical Variations
XE0052S1/T1 - Vertical Mount
XE0052S2/T2 - Horizontal Mount
*
*
*
*
XE0052 Block Diagram
Tx
Rx
2 TO 4
WIRE
CONVERTER
SURGE
AND
PROTECTIVE
NETWORK
LINE
CURRENT
CIRCUIT
TIP
RING
OH
HOOK-
SWITCH
CONTROL
RI
RING
DETECT
CIRCUIT
XECOM
(1)
XE0052
XE0052S1 and XE0052T1 Mechanical Specifications
C
B
A
Pin 1
Pin 1
H
F
G
F
E
D
Vertical Package
Inches
Min
Max
0.300
0.490
1.490
0.040
1.390
0.090
0.790
0.125
0.320
0.510
1.510
0.060
1.410
0.110
0.810
0.200
Millimeters
Min
Max
7.62
12.45
37.85
1.02
35.31
2.29
20.07
3.18
8.13
12.95
38.35
1.52
35.81
2.79
20.57
5.08
Dim
A
B
C
D
E
F
G
H
XECOM
(2)
XE0052
XE0052S2 and XE0052T2 Mechanical Specifications
C
B
Pin 1
A
H
F
G
F
E
D
Pin 1
I
Horizontal Package
Inches
Min
Max
0.490
0.320
1.490
0.040
1.390
0.090
0.790
0.125
0.440
0.510
0.330
1.510
0.060
1.410
0.110
0.810
0.200
0.450
Millimeters
Min
Max
12.45
8.13
37.85
1.02
35.31
2.29
20.07
3.18
11.18
12.95
8.38
38.35
1.52
35.81
2.79
20.57
5.08
11.43
Dim
A
B
C
D
E
F
G
H
I
XE0052 Pin Configuration (Top view)
8
O
7
O
6
O
5
O
4
O
3
O
2
O
1
O
/RI
RX VCC Gnd TX
OH
Tip Ring
XECOM
(3)
XE0052
XE0052 Pin Descriptions
Pin
1
Name
Ring
I/O
---
Description
Ring connection to the phone line (RJ11 Pin 4). The Ring pin has 1500 volts isolation
from the rest of the circuitry. This isolation must be preserved throughout the system.
Tip Connection to the phone line (RJ11 Pin 3). The Tip pin has 1500 volts isolation
from the rest of the circuitry. This isolation must be preserved throughout the system.
Hookswitch relay control. A high on OH closes the internal relay and connects the
equipment to the telephone line.
TX provides the analog input signal to the 2-4 wire convertor of the XE0052S. TX
uses a 2.5 volt reference signal and therefore must be capacitively coupled to the host
equipment.
Ground
+5 Volts supply power
RX provides the analog output signal from the 2-4 wire converter of the XE0052S. RX
uses a 2.5 volt reference signal and therefore must be capacitively coupled to the host
equipment.
Ring Indicate, output, active low, TTL. On the XE0052S a low on /RI indicates the
modem is receiving a ring signal. The XE0052T provides a pulse string at twice the
ring frequency when a ring is detected.
2
Tip
---
3
OH
I
4
TX
I
5
6
7
GND
VCC
RX
--
---
O
8
/RI
O
XE0052 Absolute Maximum Ratings
Storage Temperature
Operating Temperature Range
Maximum Lead Temperature
(soldering 2 seconds per wave)
-25 C to +85 C
0
O
C to +70
O
C
260
O
C
O
O
XECOM
(4)
XE0052
XE0052 Electrical Specifications
(VCC = 5V + 10%, Ta = 0 to 70C)
Parameter
Power Supply Current
Transmit Insertion loss
Receive Insertion loss
Line Impedance
Transhybrid Loss
Conditions
Ring Indicate Active
600 Ohm Impedence, 1000 Hz
600 Ohm Impedance, 1000 Hz
At 1000 Hz
Attenuation between transmiter input and
receiver output at 1KHz with 600 ohm
line termination
Min. AC voltage between Tip & Ring
Type B ringer
Ringing voltage of 40 Vrms applied
between Tip & Ring
No Ringing Voltage present
Ring Voltage present on Tip and Ring
ON: (off-hook)
OFF: (on-hook)
Off-Hook
Min
Typ
10
0
0
Max Units
15
mA
dB
dB
660
Ohms
dB
540
10
600
18
Ring Detect Sensitivity
Ring Detect Peak Current
Ring Detect Idle Current
Ring Indicate Output
Loop Current Switch
Control Voltage
Loop Current Switch
Control Current
38
100
10
0.2
2.0
3.0
0.2
0.5
0.5
0.5
Vrms
uA
uA
Volts
Volts
Volts
mA
XE0052 Typical Connection Diagram
+5 Volts
XE0052S or XE0052T
/RI Rx Vcc Gnd Tx OH
8 7 6 5 4 3
Tip Ring
2
1
10 ohms, 1/2 W
FerriteBead
Teccor
P3100SB
Modem Analog
Front End
/Ring
RJ11
4
3
Receive
10
mFd
10 ohms, 1/2 W
Transmit
10
mFd
OHRLY
FerriteBead
470 pFd
3000 Volts
470 pFd
3000 Volts
XECOM
(5)
XE0052
