CH1837A Cermetek Microelectronics, CH1837A Datasheet - Page 4

• Manufacturer Part Number: CH1837A
• Manufacturer: Cermetek Microelectronics

Specifications of CH1837A

• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Lead Free Status / Rohs Status: Supplier Unconfirmed

2004 Cermetek Microelectronics, Inc.
Cermetek Microelectronics, Inc.
MOUNTING THE DAA
There are two mounting techniques recommended for
physically connecting the CH1837A/8A DAA to a PCB:
Direct Soldering.
soldered onto a circuit card. All CH1837A/8A products
are hermetically sealed and will not be harmed by
industry standard wave soldering 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/8A seated to avoid
any possibility that the CH1837A/8A works loose
during shipment.
Summary of Recommended Suppliers for a list of
recommended socket manufacturers.
FCC (USA) AND DOT (CANADA)
REGISTRATION
FCC Part 68 or DOT CS-03 registration of the end
product containing the CH1837A/8A DAA is normally
quite simple. The process involves testing the end
system for compliance and submitting the test data to
the FCC or DOT for review.
Typically, independent approved testing labs are
contracted to perform the required tests on the end
product and to submit the required paperwork to the
FCC or DOT. If desired, Cermetek can assist with the
Registration activity.
Summary of Recommended Suppliers. The user is
assigned the registration and assumes all risk for
registration compliance.
1. Direct soldering.
2. Sockets.
Failure to do so will cause unreliable or
The socketing approach to mounting
The CH1837A/8A may be wave
See Application Note # 130,
See Application Note # 130,
When
It is
Page 4
CH1837A/8A Data Access Arrangement Module
Document No. 607-0014 Revision C3 (02/04)