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參數資料
| 型號： | CH1840 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Profile Data Access Arrangement (DAA) Modules |
| 中文描述： | 超薄數據訪問安排（DAA）模塊 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 432K |
| 代理商： | CH1840 |
2000 Cermetek Microelectronics, Inc.
Page 1
Document No. 607-0011 Rev. A (5/00)
INTRODUCTION
The CH1840 is an ultra small, low profile Data Access Arrange-
ment (DAA). Its modular construction and single +5 Volt D.C. power
requirement simplify your development process. Specifically de-
signed for both voice and data, this device allows direct connec-
tion of these circuits to the telephone lines. The CH1840 has FCC
Part 68 registration that can be transferred to your product. Simply
attach the included registration sticker to the outside of your prod-
uct. This eliminates the costs and delays associated with Part 68
testing and registration.
The CH1840 has also been designed to meet the requirements of
Canada’s Department of Communication (DOC). However, it is
necessary to register your product with the DOC before use in
Canada.
The CH1840 requires only 1.5 square inches of circuit board space
and presents a profile of only 0.35 inches in height. This DAA can
either be mounted directly on a printed circuit board or socketed.
Connection is made through 0.025 inch square pins on 0.10 inch
centers. The telephone line connection is made through a user
supplied RJ-11 jack.
The CH1840 DAA is designed for use with a variety of voice circuitry
and LSI modem/fax chip sets. This device is ideal for fax and
modem applications up through V.32bis. The CH1840 is pin com-
patible with the CH1817.
C
ermetek
CH1840
Low Profile Data Access Arrangement (DAA) Modules
FEATURES
Works with all modem chip sets
Available in 0 dB, -6 dB, and -9 dB insertion losses
Available in extended temperature operation,
-40
o
C to +85
o
C
Complete DAA function
Voice and data
FCC Part 68 registered
Registration conveyed to user
Hook switch control
Ring detection
Single +5V operation
Pulse dial capability
FUNCTIONAL DESCRIPTION
The operation of the CH1840 can be broken down into the
functional blocks shown in Figure 1.
1) Phone line control
2) Billing delay
3) Ring detection
4) Signal Path
5) 2- to 4-wire converter
Control inputs and status outputs for the CH1840 are compat-
ible with 5 Volt CMOS. See the Electrical Specifications.
Phone Line Control
In the Public Switched Telephone Network (PSTN), the wires
from a telephone to the phone company’s central office (CO) are
referred to as the local loop.
Figure 1. CH1840 Functional Block Diagram
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| CH5309 | HIGH RELIABILITY CURRENT REGULATOR DIODES |
| CH5310 | HIGH RELIABILITY CURRENT REGULATOR DIODES |
| CH5311 | HIGH RELIABILITY CURRENT REGULATOR DIODES |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CH1840BET | 制造商:Cermetek Microelectronics 功能描述:Data Access Arrangement 12-Pin |
| CH1840D | 制造商:Cermetek Microelectronics 功能描述:Data Access Arrangement 12-Pin |
| CH1840DET | 制造商:Cermetek Microelectronics 功能描述:Data Access Arrangement 12-Pin |
| CH1840DM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| CH1840DMET | 制造商:Cermetek Microelectronics 功能描述:OTHER |
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