CH1782A 데이터 시트보기 (PDF) - Cermetek Microelectronics

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CH1782A

Family of Ultra Small Modem Modules V.22bis-2400bps

Cermetek Microelectronics 

Cermetek Microelectronics, Inc.

PHONE LINE CONNECTION GUIDELINES

1. The CH1782A must be mounted in the final

assembly such that it is isolated from exposure to

any hazardous voltages within the assembly.

Adequate separation and restraint of cables and

cords must be provided.

2. The circuitry from the CH1782A to the telephone

line interface must be provided in wiring that

carries no other circuitry other than that

specifically allowed in the FCC rules (such as A

and A1 leads).

3. Connection to phone line should be made

through an RJ-11C jack.

4. PCB traces from the modem’s RING and TIP pins

to the RJ-11C jack must be 0.1 inch spacing or

greater to one another and 0.2 inch spacing or

greater to all other traces. The traces should

have a nominal width of 0.020 inches or greater.

5. The RING and TIP PCB traces should be as

short as possible and oriented to prevent

coupling other high speed or high frequency

signals present on the host circuit PCB.

6. No additional circuitry other than that shown in

Figure 7A or 7B may be connected between the

modem module and the RJ-11C jack. Doing so

will invalidate the FCC approval.

7. The CH1782A, the RJ-11C jack, the interfacing

circuitry and all PCB traces in between, must be

contained on a PCB with a 94 V-0 flammability

rating.

8. The supplied FCC registration label must be

applied visibly on the outside of the product.

9. The product’s User Manual must provide the user

with instructions for connection and use as

recommended in the FCC Registration Section

below.

CH1782A HANDLING AND ASSEMBLY

RECOMMENDATIONS

The CH1782A contains static-sensitive components

and should only be handled by personnel and in

areas that are properly protected against static

discharge. The two recommended mounting

techniques for physically connecting the CH1782A to

a PCB are discussed below.

Direct Soldering. The CH1782A may be wave

soldered. All CH1782A products are hermetically

sealed and will not be harmed by industry standard

wave soldering processes.

CH1782A Family of Ultra Small Modem Modules V.22bis-2400bps

Socketing. The socketing approach to mounting

eliminates cleaning and desoldering concerns. When

the socket is used, it must make a solid connection to

all pins. Failure to do so will cause unreliable or

intermittent operation. Also, steps should be taken to

assure that the module remains tightly seated in the

socket during shipping. Cermetek recommends using

sockets from Samtec. See Application Note # 130,

Summary of Recommended Suppliers.

FCC REGISTRATION

All products in the CH1782A family are registered

with the FCC (Federal Communications Commission)

under Part 68. To maintain the validity of the

registration, you must serve notice to the end user of

the products of several restrictions the FCC places on

the modem and its use.

In addition to restriction notification, the FCC requires

that Cermetek make all repairs to all products in the

CH1782A family. If repairs are necessary after

installation of the CH1782A in the end product and

the end product has been delivered to the end user,

the end product must be returned to the end product

supplier where the CH1782A can be removed and

then forward to Cermetek for repair. The following

notice is recommended and should be included in the

end product’s user manual.

FOR YOUR USER’S MANUAL

The FCC Part 68 rules require the following (or

equivalent) be provided to the end user of equipment

containing a DAA.

Type of Service. The (insert end product name) is

designed to be used on standard device telephone

lines. It connects tot he telephone line by means of a

standard jack called the USOC RJ-11C (or USOC

RJ45S). Connection to telephone-company-provided

coin service (central office implemented systems) is

prohibited. Connection to party lines service is

subject to state tariffs.

Changes in Attestation Procedure for Plugs and

Jacks. (Name of applicant) attests that the network

interface plugs or jacks used on this equipment

comply with and will continue to comply with the

mechanical requirements specified in Part 58, sub-

part F, specifically the dimensions, tolerances and

metallic plating requirements. The compliance of

these connectors will be assured by purchase

specifications and incoming inspection.

Documentation of such specifications and/ or

inspections will be provided to the FCC within 30

days of their request for the same.

2002 Cermetek Microelectronics, Inc.

Page 11

Document No. 607-0009 Revision C (01/03)

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