CH1837F ETC1 [List of Unclassifed Manufacturers], CH1837F Datasheet - Page 4

• Manufacturer Part Number: CH1837F
• Description: CH1837A/7F/8A Data Access Arrangement Module V.34bis High Speed DAA Module
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

2002 Cermetek Microelectronics, Inc.
Cermetek Microelectronics, Inc.
HANDLING
RECOMMENDATIONS
The CH1837A/7F/8A DAA Module contains static-
sensitive components and should only be handled by
personnel and in areas that are properly protected
against static discharge. Industry standard ESD and
EOS procedures and precautions should be observed
when handling CH1837A/7F/8A products.
MOUNTING THE DAA
There are two mounting techniques recommended for
physically connecting the CH1837A/7F/8A DAA to a
PCB:
Direct Soldering. The CH1837A/7F/8A may be wave
soldered onto a circuit card.
products are hermetically sealed and will not be
harmed
processes.
To avoid the problems of flux contamination, hand
soldering is preferred to wave soldering.
cleaning, use only demonized water.
Socketing.
eliminates cleaning and desoldering concerns. When
the socket is used, it must make a solid connection to
all pins.
intermittent operation.
When using sockets, steps should be taken to assure
that the DAA module remains tightly seated in the
socket after the end product is shipped.
recommended that some type of mechanical restraint
be provided to keep the CH1837A/7F/8A seated to
avoid any possibility that the CH1837A/7F/8A works
loose during shipment. See Application Note # 130,
Summary of Recommended Suppliers for a list of
recommended socket manufacturers.
FCC (USA) REGISTRATION
Because the CH1837A/7F/8A already meets the FCC
requirements for Part 68 registration for High Voltage
Isolation and Surge Protection when circuited per the
requirements of Figure 5 herein, certification of the end
product containing the CH1837A/7F/8A DAA is
normally quite simple. The process involves testing
the end system for compliance and submitting the test
data to the FCC for review.
Typically, independent FCC approved testing labs are
contracted to perform the required tests on the end
product and to submit the required paperwork to the
FCC.
Registration activity.
1. Direct soldering.
2. Sockets.
If desired, Cermetek can assist with the
by
Failure to do so will cause unreliable or
The socketing approach to mounting
industry
AND
standard
All CH1837A/7F/8A
wave
ASSEMBLY
soldering
When
It is
Page 4
DOT (CANADA) REGISTRATION
The CH1837A/7F/8A DAA meets or exceeds the
hazardous voltage, surge and leakage requirements of
the FCC when circuited per the requirements of Figure
5 herein. Although the FCC and DOT requirements
are virtually identical, it is recommended that for
applications that connect to Canadian PSTN lines, a
Canadian test house/consultant be retained to ensure
compliance of the end product.
CH1837A/7F/8A Data Access Arrangement Module
Document No. 607-0014 Revision C2 (12/02)