XE0002D
August 2005
Modular DAA with 2/4 Wire Convertor
Description
Features:
The XE0002D is a compact DAA module designed
  • Small Size: just 1.25 inches by 1.0 inches by
  • for applications requiring voice, data or fax
    0.32 inches high
    transfer. It complies with FCC Part 68 rules for
  • FCC Part 68 Compliant
  • direct connection to the public switched telephone
    network and also supports leased line applications.
  • User selectable 2-4 wire convertor
  • Active Low Ring Detection
  • The XE0002D provides a complete telephone
  • Integral Switch Hook
  • interface. It includes the 2/4 wire convertor to
    separate transmit and receive signals, ring
  • Supports V.32 Data Transfer
  • detection, integral switch hook and telephone line
  • Supports both dial-up and leased line
  • transformer. All of this circuitry is integrated into a
    applications
    module requiring only 1.25 inches of board space.
  • Extended Operating Temperature Range (-40C
  • to +85C) available
    XE0002D Block Diagram
    /OH
    Hook - Switch
    Tip
    XMIT
    2/4 - Wire
    Telephone
    Loop
    Converter
    Line
    Current
    RCVR
    Transformer
    Holding
    Ring
    Circuit
    XFMR
    J1
    T1
    T2
    J2
    /RI
    Ring Detect
    Jumpers J1 and J2 must be installed to connect the 2 to 4 wire convertor.
    XECOM
    (1)
    XE0002D
    XE0002D Mechanical Specifications
    Inches
    Millimeters
    Dim
    Min
    Max
    Min
    Max
    A
    1.235
    1.265
    31.37
    32.13
    B
    0.985
    1.015
    25.02
    25.78
    C
    0.490
    0.510
    12.45
    12.95
    D
    0.890
    0.910
    22.61
    23.11
    E
    0.890
    0.910
    22.61
    23.11
    F
    0.125
    -
    3.18
    -
    G
    0.040
    0.060
    1.02
    1.52
    H
    0.165
    0.185
    4.19
    4.70
    J
    0.090
    0.110
    2.29
    2.79
    K
    0.020
    0.025
    0.51
    0.64
    XE0002D Pin Configuration
    VDD
    1
    20
    TIP
    VCC
    2
    /RI
    3
    (Top View)
    RCVR
    4
    17
    RING
    XMIT
    5
    XFMR
    6
    T1
    7
    14
    N/C
    OH
    8
    13
    N/C
    Gnd
    9
    12
    N/C
    T2
    10
    11
    N/C
    XECOM
    (2)
    XE0002D
    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
    XE0002D Electrical Specifications (VCC = 5V + 10%, Ta = 0 to 70C)
    Parameter
    Conditions
    Min
    Typ
    Max Units
    Power Supply Current
    VCC
    10
    mA
    VDD
    4
    mA
    Transmit Insertion loss
    600 Ohm Impedance, 1000 Hz
    0
    dB
    Receive Insertion loss
    600 Ohm Impedance, 1000 Hz
    0
    dB
    Line Matching Resistor (Rm)
    for 600 ohm telephone line
    340
    ohms
    Line Impedance
    At 1000 Hz, Rm equal to 340 ohms
    540
    600
    660
    Ohms
    without internal 2/4 wire convertor
    Transhybrid Loss
    Attenuation between transmitter input and
    10
    18
    dB
    receiver output at 1KHz with 600 ohm
    line termination
    Transmit Input Impedance
    At XMIT, 1800 Hz
    8
    10
    12
    Kohm
    Receive Output Impedance
    At RCVR, 1800 Hz
    10
    100
    ohms
    Ring Detect Sensitivity
    Min. AC voltage between Tip & Ring
    38
    Vrms
    Type B ringer
    Ring Indicate Output
    Ring Voltage present on Tip and Ring
    0.2
    0.5
    Volts
    Hook Switch Control Voltage
    ON: (off-hook)
    4.0
    Volts
    OFF: (on-hook)
    0.8
    Volts
    Hook Switch Control Current
    Off-Hook
    0.5
    mA
    Telephone Line Loop Current
    Off-Hook
    20
    100
    mA
    XE0002D Absolute Maximum Ratings
    Storage Temperature
    -25Cto+85C
    Operating Temperature Range
    0C to +70C
    260 C
    O
    Maximum Lead Temperature
    (soldering 2 seconds per wave)
    XECOM
    (4)
    XE0002D
    XE0002D Typical Connection Diagram with Internal 2/4 Wire Converter
    +5 Volts
    -5 Volts
    XE0002D
    Modem Analog
    10 ohms, 1/2 W
    Front End
    VDD
    TIP
    FerriteBead
    RJ11
    VCC
    Teccor
    4
    /Ring
    /RI
    P3100SC
    3
    Receive
    RCVR
    FerriteBead
    Transmit
    XMIT
    RING
    XFMR
    10 ohms, 1/2 W
    J1
    470 pFd
    T1
    470 pFd
    3000 Volts
    3000 Volts
    OHRLY
    OH
    Gnd
    J2
    T2
    XE0002D Typical Connection Diagram without Internal 2/4 Wire Converter
    +5 Volts
    XE0002D
    10 ohms, 1/2 W
    VDD
    TIP
    RJ11
    TDK 73M1903
    FerriteBead
    VCC
    Teccor
    4
    GPIO0
    /RI
    P3100SC
    3
    RCVR
    FerriteBead
    XMIT
    RING
    RXAN
    XFMR
    10 ohms, 1/2 W
    42K
    470 pFd
    TXAN
    R1
    T1
    470 pFd
    3000 Volts
    3000 Volts
    TXAP
    R2
    T2
    RXAP
    42K
    Gnd
    /OH
    GPIO1
    Note:
    R1 and R2 each equal one half of the ideal line matching impedance, 170 ohms.
    XECOM
    (5)
    XE0002D
    XE0002D FCC Instructions
    When developing a product to be connected to the telephone line, it is necessary to use a circuit described as
    a Data Access Arrangement (DAA) which is approved by the appropriate governmental agency. In the US,
    for example, this agency is the Federal Communications Commission (FCC), while in Canada it is the
    Department of Communications (DOC). 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 XE0002D has been designed to meet all FCC Part 68 requirements for hazardous voltage, surge
    protection and leakage current. If the system developed transmits data, 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
    200Hz
    to
    3990Hz
    -9 dBm
    3990Hz
    to
    4005Hz
    -27 dBm
    4005Hz
    to
    16kHz
    -16 dBm
    8kHz
    to
    94kHz
    -47 dBm
    86kHz
    to
    270kHz
    -46 dBm
    270kHz
    to
    6MHz
    -6 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 XE0002D 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 XE0002D 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 XE0002D. 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 XE0002D already complies with FCC Part 68 rules, this is a
    relatively simple process.
    XECOM
    (6)
    XE0002D
    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
    regarding the freedom of the described devices from patent infringement. XECOM makes no warranty of
    merchantability 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 applications, 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 © 2005
    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 trademarks
    and/or registered trademarks of their respective companies.
    Xecom Incorporated
    374 Turquoise Street, Milpitas, CA 95035
    Ph:408-942-2200 Fax:408-942-1346
    Email: info@xecom.com
    www.xecom.com
    XECOM
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    XE0002D