XE1030
September 2004
SIP DAA Provides 3750 Volt Isolation Barrier
Description
Features
Xecom’s XE1030 is a complete DAA in a compact Single-
* Small Single In-Line Package: 1.6” by 0.5” by 0.45”
in-Line package. It provides an ideal telephone interface
* 3750 Volt DC Isolation barrier between the
for modem, audio and DTMF signaling applications.
telephone line and all other points.
The XE1030 also provides a 3750 volt isolation barrier
* FCC Part 68 Compliant;
making it ideal for safety critical applications. Typical
* UL Recognized
DAA circuits provide the minimum 1500 Volt DC isolation
* Integrated Low-Distortion Telephone Line
required by FCC part 68 rules. Xecom designed the
Transformer
XE1030 to meet more stringent requirements.
* Ring Detection, active high and active low options
available;
The XE1030 provides all of the circuits required to con-
nect equipment to the public telephone network. these
* Operates on a Single +5 Volt Power Supply;
include a solid-state hook switch to control the connec-
* Solid-State Hookswitch Control, active high and
tion to the telephone line, a fully isolated Ring Detect
active low options available;
circuit, isolation transformer and loop current holding
* Caller ID Pass-through included;
circuit. The XE1030 even includes a circuit to allow Caller
* Extended Temperature Ranges available;
ID signals to be passed along the signal path without any
control lines or switching requirements. The XE1030 is
complete and ready for service as Xecom ships it.
XE1030 BLOCK DIAGRAM
/OH
Hook-Switch
T1
Loop
CID
Path
Tip
Trans-
Current
T2
former
Holding
Ring
Circuit
RI
Ring Detect
XECOM
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XE1030
XE1030 Mechanical Specifications
A
B
C
E
Pin 1
G
G
D
K
H
F
J
Inches
Millimeters
Dim
Description
Min Max
Min
Max
A
Module Width
0.420 0.460
10.80 11.56
B
Module Length
1.590 1.630
40.39 41.40
C
Module Height
0.490 0.530
12.45 13.46
D
Pin Row to Edge
0.100 0.140
2.54
3.56
E
Pin Length
0.120 0.140
3.05
3.56
F
Pin 1 to Edge
0.150 0.170
3.81
4.32
G
Pin to Pin
0.040 0.060
1.02
1.52
H
Pin 2 to Pin 3
1.070 1.080
27.18 27.43
J
Pin Row Length
1.410 1.440
35.81 36.58
K
Pin 9 to Edge
0.015 0.035
0.38
0.89
All Pins are 0.018 inches square; Tin Plated.
XECOM
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XE1030
XE1030 Pin Descriptions
1
2
3
4
5
6
7
8
9
Ring Tip
/OH NC T1 T2 Gnd RI Vcc
XE1030 Pin Configuration
Pin Name Description
Pin Name Description
1
Ring Ring is one wire of the two-wire telephone
4
N/C
No Connection
line connection (RJ11 Pin 4). The XE1030
5
T1
T1 in conjunction with T2 provides the
provides a 3750 volt isolation barrier between
differential input/output for the analog signal.
the telephone line and all other circuits. FCC
T1 connects directly to the secondary side of
Part 68 rules require a 1500 Volt isolation
the line transformer embedded into the
barrier to be preserved throughout the
XE1030. To match the impedance of the
system. Xecom recommends 0.100 inch
DAA to the 600 ohm telephone line, a 430
spacing between traces connected to Ring and
ohm resistor is required on T1 or T2.
all other conductors to preserve this isolation.
6
T2
T2 in conjunction with T1 provides the
2
Tip
Tip is one wire of the two-wire telephone line
differential input/output for the analog signal.
connection (RJ11 Pin 3). The telephone
T2 connects directly to the secondary side of
company places a DC "Battery" voltage
the line transformer embedded into the
across Tip and Ring on all public switched
XE1030. To match the impedance of the
telephone lines. The XE1030 accept this line
DAA to the 600 ohm telephone line, a 430
battery voltage without regard to its polarity.
ohm resistor is required on T1 or T2.
3
/OH
Switch-hook control to the modem. /OH is an
7
GND Ground connection to the XE1030 This
active low input. Activating OH closes the
signal provides the reference for the OH
switch-hook causing the XE1030 to seize the
output and RI input. This pin should be
local telephone line. The telephone line
connected to the systems digital ground.
connection is dropped when /OH is
8
RI
Ring Indicate in an active high output from
deactivated.
the modem. RI provides a square wave repre-
Rotary dialing can be simulated by pulsing
sentation of the Ring signal present across
/OH. The required pulse rate in the US is ten
Tip and Ring. This permits intelligent moni-
pulses per second. Each digit is dialed as a
toring of the incoming ring. The XE1030 rec-
series of pulses created by closure of the
ognizes ring voltages of thirty-eight to one
hook-switch. (one pulse for the digit one to
hundred fifty volts RMS in the frequency
ten pulses for the digit zero) The pulses must
range of sixteen to sixty-eight Hertz.
be asymmetrical so that the hook-switch is
9
VCC +5 Volt power source for the XE1030 VCC
closed for thirty-one milliseconds and open
powers the RI and OH control lines.
for sixty-nine milliseconds. An inter-digit
delay of at least one hundred milliseconds is
required.
XECOM
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XE1030
Typical Connections Diagram for North America and Japan
XE1030
FB1
Tip 1
F1
RJ11
Ring 2
MOV1
FB2
F2
C1
C2
To System Hook Switch Control
/OH 3
NC 4
430 ohms
T1 5
Audio Signal Path
T2 6
Gnd 7
To System Controller
RI 8
Vcc 9
+5V
Recommended Parts
Designation
Description
C1, C2
470 pFd, 3000 Volts; These capacitors may be required for EMI filtering to prevent unintended
radiation when the telephone cable is attached to your system. These capacitors must be rated
at a minimum of 1500 volts to maintain the isolation required by FCC Part 68 Rules, but 3000
volts is recommended to maintain the isolation barrier provided by the XE1030.
FB1, FB2
All equipment with a system clock of 9 KHz or greater is required to comply with EMI
regulations. FB1 and FB2 are ferrite beads which may be required to prevent unintended
radiation when the telephone cable is attached to your system. Xecom recommends the TDK
ACB2012L-120 which provides more than 100 ohms impedance at frequencies above 100 MHz.
MOV1
MOV1 protects against damage from lightening strikes on the telephone lines. Xecom
recommends the Teccor P3100BA Sidactor to provide this protection.
F1, F2
F1 and F2 prevent damage to the system when a power line crosses with the telephone line.
Xecom recommends the Raychem TR600-150 for this function. The TR600-150 is a PTC devices
which automatically resets after use.
XECOM
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XE1030
Electrical Specifications (Vcc=+5v ±10%, Ta=0 to 70 deg C)
Parameter
Conditions
Min
Typ
Max
Units
Power Supply Current
Off-hook
10
15
mA
On-hook
0.5
mA
Transmit Insertion loss
600 Ohm Impedance, 1800 Hz
2.0
4.0
dB
Receive Insertion loss
600 Ohm Impedance, 1800 Hz
2.0
4.0
dB
Line Matching Impedance (RT)
Input to T1 and T2
430
ohms
Line Impedance
RT equals 430 ohms
600
ohms
Ring Detect Sensitivity
Min. AC voltage between Tip &
38
150
Vrms
Ring Type B ringer
Ring Frequencies Detected
16
68
Hz
RI Output Voltage
Ring signal present, Active low
4.2
Volts
Hook-Switch Control Voltage
ON: (off-hook)
0.2
0.5
Volts
OFF: (on-hook)
2.0
3.0
Volts
Hook-Switch Control Current
ON: (off-hook)
5
10
milliamps
OFF: (on-hook)
5
microamps
Loop Current
Off-Hook Loop Current
10
120
mA
DC On-Hook Impedance
Hookswitch Open
10
MOhms
XE1030 ABSOLUTE MAXIMUM RATINGS
Storage Temperature
-25 O C to +85 O C
Operating Temperature Range *
0 O C to +70 O C
* The XE1030 can be ordered with an Operating Temperature of -40 O C to +85 O C at extra cost.
Order Model Number XE1030-ITR
XECOM
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XE1030
XE1030 Applications Notes
Dialing:
Digit
Lower Tone
Upper Tone
The public switched telephone network permits tone
1
697
1209
and rotary (pulse) dialing. The XE1030 supports both
2
697
1336
types. Tone dialing requires an external signal source
3
697
1477
to generate the dialing tones. Rotary dialing is
4
770
1209
accomplished by pulsing the OH line on the XE1030.
5
770
1336
Pulse Dialing: The XE1030 generates dialing pulses
6
770
1477
through momentary closures of the switch-hook. Each
7
852
1209
digit is represented as a series of pulses, one pulse for a
8
852
1336
one to ten pulses for a zero. The pulse rate varies from
9
852
1477
ten pulses per second in North America to 20 pulses per
0
941
1336
second in Europe. The dialing pulses are asymmetrical.
*
941
1209
To achieve the correct duty cycle consult with the local
country regulations. An inter-digit delay of at least one
#
941
1477
hundred milliseconds separates the digits.
Signal Levels:
Tone Dialing: To permit tone dialing the XE1030 seizes
FCC Part 68 Rules set the maximum allowable signal
the line, OH active. For each digit a unique DTMF, Dual
level in the US for all signals placed on the telephone
Tone Multiple Frequency, tone pair is placed across T1
line other than live voice. Other countries have similar
and T2. The higher frequency tone is always larger than
regulations. Signal levels are measured in dBm. Zero
the lower frequency one. Transmit the tones for a
dBm is 1 milliwatt through a 600 ohm load. In the USA
minimum of 70 milliseconds, and leave a minimum of 70
the limit for most signals is -9 dBm.
milliseconds between digits.
Insertion Loss: There is some loss of signal power as
The following chart shows the correct DTMF signal
the information signal passes through the XE1030. This
frequencies for each digit.
"insertion" loss should be taken into account when
placing signals across T1 and T2 for transmission. The
typical insertion loss of the XE1030 is 2 dB.
XECOM
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XE1030
XE1030 Applications Notes
2/4 Wire Conversion:
Full Duplex communications over a two-wire telephone line requires that transmit and receive signal share the available bandwidth.
The two-to-four wire convertor separates these signals at the host interface. Most modem analog front end chips incorporate an
internal 2/4 wire convertor making it unnecessary to provide one in the DAA.
If you are using the XE1030 for an application other than a modem, or your modem analog front end does not provide the 2/4 wire
convertor, you will need to provide a discrete 2/4 wire convertor. The schematic below illustrates a simple 2/4 wire convertor circuit
R2=22k
R1=10k
2 _
1
T1
3 +
RT
DAA
TL082C
R5=11K
T2
R4=40k
6
R3=20k
7
5
R6=10K
2/4 Wire Convertor
The pelevel of separation provided by the 2/4wire convertor is measured by its Transhybrid Loss. The Transhybrid Loss shows
how much he 2/4 wire convertor attenuates the transmit signal on the received data line. The circuit above provides a typical
Transhybrid Loss of 20 dB.
The Transhybrid Loss will vary with the quality of the impedance match to the telephone line. Even when the recommended value
for the impedance matching resistor, R6, is used variations from line to line alter the impedance match. The value of R3 can be
changed to improve the Transhybrid Loss.
The 2/4 wire convertor also amplifies the transmit and receive signals to compensate for the insertion loss of the DAA. This circuit
provides 6 dB gain of both the transmit and receive signals. The values of R1 and R2 set the transmit gain. The values of R4 and
R5 set the receive gain.
XECOM
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XE1030
XE1030 FCC Part 68 Information
When developing a product to be connected to the telephone line, it is necessary to use a circuit known as a Data
Access Arrangement (DAA) approved by the appropriate governmental agency. In the US this agency is the Federal
Communications Commission (FCC), while in Canada it is Industry Canada (IC). These agencies test and approve the
product to ensure that it meets their specifications, thereby protecting the telephone system from damage and
protecting the user from high voltage transients (such as lightning strikes) which may come down the telephone line.
The XE1030 has been designed to meet all FCC Part 68 requirements for hazardous voltage, line impedance and leakage
current. If the system transmits data, synthesized voice, or DTMF tones on the telephone line, the user must certify that
the signals transmitted meet basic FCC requirements for maximum transmission levels, out of band energy and billing
delay. Full details may be obtained from the FCC under Part 68 of the FCC Rules and Regulations, or in Title 47 of the
Code of Federal Regulations, however the basic requirements are as follows:
1. Maximum Transmit Level
For the normal “permissive” (standard) telephone line, equipment which transmits data (such as a modem) must not
exceed a transmission level of -9 dBm.
2. Out of Band Energy
Data equipment must not transmit “out of band” energy on the telephone line which exceeds the following limits:
Frequency
Range
Max. Power
3995 Hz
to
4005 Hz
-27 dBm
4005 Hz
to
12 kHz
-20 dBm
12 kHz
to
90 kHz
-55 dBm
90 kHz
to
270 kHz
-55 dBm
270 kHz
to
6 MHz
-15 dBm
3. DTMF Transmission Level
If the system is capable of DTMF dialing, the maximum DTMF transmission level must be less than 0 dBm averaged
over a 3 second interval.
4. Billing Delay
A delay of 2 seconds or greater is required after the time the XE1030 is taken “off hook” and before any information is
transmitted. This is required to ensure that billing information may be exchanged between telephone company central
offices without interference.
The user of the XE1030 must certify to the FCC that the final system meets the requirements of Part 68 which include the
criteria above as well as the high voltage protection provided by the XE1030. This is generally accomplished through an
independent testing lab which tests the System and submits the proper paperwork to the FCC for approval. Since the
XE1030 already complies with FCC Part 68 rules, this is a relatively simple process.
XECOM
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XE1030
Terms of Sale
Devices sold by XECOM are covered by the warranty provisions appearing in its Terms of Sale only. XECOM
makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or re-
garding the freedom of the described devices from patent infringement. XECOM makes no warranty of merchant-
ability or fitness for any purposes. XECOM reserves the right to discontinue production and change specifications
and prices at any time and without notice. This product is intended for use in normal commercial applications.
Applications requiring extended temperature range, unusual environmental requirements, or high reliability applica-
tions, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without
additional processing and authorization by XECOM for such application.
Xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xecom product.
No other circuits, patents, or licenses are implied.
Life Support Policy
Xecom's products are not authorized for use as Critical Components in Life Support Devices or Systems.
Life Support Devices or Systems are devices or systems which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions pro-
vided in the labeling, can be reasonably expected to result in significant injury to the user.
A Critical Component is any component of a life support device or system whose failure to perform can be rea-
sonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness.
Copyright, Xecom © 2004
While Xecom, Inc. has made every effort to ensure that the information presented here is accurate, Xecom will not
be liable for any damages arising from errors or omission of fact. Xecom reserves the right to modify specifications
and/or prices without notice. Product mentioned herein are used for identification purposes only and may be trade-
marks and/or registered trademarks of their respective companies.
Xecom Incorporated
374 Turquoise Street, Milpitas, CA95035
Ph:408-942-2200 Fax:408-942-1346
Email: info@xecom.com
Web Site: http://www.xecom.com
XECOM
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XE1030