CH1840D ET Cermetek Microelectronics, CH1840D ET Datasheet
CH1840D ET
Specifications of CH1840D ET
Related parts for CH1840D ET
CH1840D ET Summary of contents
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... V.32bis. The CH1840 is pin compatible with the CH1837A. Figure 1. CH1840 DAA Functional Block Diagram. ©2009 Cermetek Microelectronics, Inc. CH1840 FEATURES • Works with all modem chip sets. • Available and –9 dB insertion losses. ...
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... The CH1840 defeats this function when Voice Mode is selected on the Data/Voice pin. Figure 2. Typical CH1840 Application. ©2004 Cermetek Microelectronics, Inc. CH1840 Family of Low Profile DAA Modules RING DETECTION The central office signals an incoming call by placing a ring signal on the local loop. The CH1840 monitors the loop for this signal ...
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... CH1840 monitors the transmit audio signal at XMIT. If the signal level exceeds 0 dBm. The output PSQ is normally LOW set HIGH when ©2004 Cermetek Microelectronics, Inc. excessive Power is detected and returns LOW when the transmitted signal is unsquelched. The squelch feature is defeated when Voice Mode is selected on the Data/Voice pin ...
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... One input pin of two when used in differential mode with pin 9. 12 GND I SIGNAL AND POWER COMMON GROUND, Input. ©2009 Cermetek Microelectronics, Inc. Table 1.Pin descriptions Function Page 4 CH1840 Family of Low Profile DAA Modules Document No. 607-0011 Revision C (09/09) ...
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... Traces should have a nominal width of 0.020 inches or greater. 4. TIP and RING traces should be as short as possible and should be oriented to prevent direct or ©2009 Cermetek Microelectronics, Inc. induced coupling with other signals on the host circuit card. 5. The DAA Module is a sensitive subsystem that ...
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... Cermetek Microelectronics, Inc. CH1840 Family of Low Profile DAA Modules 4) In cases of operational problems, disconnect your unit by removing the modular plug from the telco jack ...
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... SMD parts 1/8W minimum) in each lead (TIP and RING). You may substitute fuses or the Poly Fuse described in Section 2. ©2009 Cermetek Microelectronics, Inc. B. For lightning prone areas where there are more than 2 storms per year, provide an earth ground connection and use a three terminal sidactor or similar device that provides metallic and longitudinal protection ...
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... Ringer Equivalence REN TIMERS Ring Detection Delay T RGD Billing Delay Timer T BD Hook Switch Power Supply Current ©2009 Cermetek Microelectronics, Inc. CH1840 DAA Electrical Specifications. T =0°C to 55°C unless otherwise specified A Conditions IL IOH=0.2mA IOL=2.0mA Conforms to FCC Part 68 hazardous voltage and leakage ...
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... CH1840B ET FCC Registered DAA; 9.5 dB Transmit Insertion Loss; Operating Temperature -40°C to 85°C; Customer Specific Modification to Calibrate Receive Output Level CH1840D ET FCC Registered DAA Transmit Insertion Loss; Operating Temperature -40°C to 85°C CH1840R ET FCC Registered DAA; 9.5 dB Transmit Insertion Loss; Operating Temperature -40°C to 85°C; RoHS Compliant FCC Registered DAA ...
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... Cermetek provides the user with a FCC (USA) and IC (Canada) Approved or device. However, Cermetek does not have influence over nor knowledge of the specific user application environment. Therefore, for FCC and IC Approved or Approvable devices, the user assumes all risk for maintaining compliance to registration. 374 Turquoise Street Web Site: ©2009 Cermetek Microelectronics, Inc. | Milpitas CA 95035 | Phone: 408-942-2200 http://www ...