XE0092-ITR Cermetek Microelectronics, XE0092-ITR Datasheet - Page 11

• Manufacturer Part Number: XE0092-ITR
• Manufacturer: Cermetek Microelectronics

Specifications of XE0092-ITR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Cermetek Microelectronics, Inc
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 XE0092 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:
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 XE0092 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 XE0092 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 XE0092. 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 XE0092 already complies with FCC Part 68 rules, this is a relatively simple process.
©2009 Cermetek Microelectronics, Inc.
......................................... 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
FCC part 68 Information
Page 11
Document No. 607-0100 Revision A (10/09)
XE0092 Low-cost DAA Module