CH1837F ETC1 [List of Unclassifed Manufacturers], CH1837F Datasheet
CH1837F
Related parts for CH1837F
CH1837F Summary of contents
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CH1837A/7F/8A Data Access Arrangement Module INTRODUCTION The Cermetek CH1837A/F Data Access Arrangement (DAA) is designed to meet requirements of 33.6Kbps modems, such as V.34bis, for embedded applications. The CH1837A/F meets or exceeds the requirements for V.34 and can be used ...
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Cermetek Microelectronics, Inc. Ring Detection. To announce an incoming call, the telephone company’s central office (CO) applies an AC ringing signal to the CH1837A/7F/8A is designed to detect this signal. The CH1837A/7F/8A uses the AC ring signal to produce a ...
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Cermetek Microelectronics, Inc. TRANSMIT SIGNALS The CH1837A/7F/8A does not attenuate the transmit signal before it applies the signal across tip and ring. Therefore, a transmit signal of –9dBm applied to XMIT will comply with the FCC Part 68 requirement for ...
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Cermetek Microelectronics, Inc. HANDLING AND 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 ...
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... When answering incoming calls in response to a ring indication on RI, internal degradation may occur if OFFHK is set HIGH before RI returns to its HIGH state. 2. For CH1837A, the RI output is 2X the frequency of the incoming ring signal. 3. For CH1837F, the RI output is 1X the frequency of the incoming ring signal. PIN I/O ...
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Cermetek Microelectronics, Inc. Table 3. CH1837A/7F/8A Electrical Specifications. Parameter Logic Input HIGH Input LOW Input Leakage HIGH Input Leakage LOW Output HIGH Output LOW Isolation Protection Between TIP and RING Surge Protection Between TIP and RING Transmission Insertion Loss Frequency ...
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Cermetek Microelectronics, Inc. Figure 5. PSTN Line Interface. 1. Currently Limiting PSTN Protection Line Device. Currently limiting devices are mandatory to meet UL safety standards. For FCC Part 68 approval, the current limiting components identified as F1 and F2 in ...
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... Order Option to Standard CH1837A/F product. Notes: 1. Pins are 0.010 inches X 0.020 inches. *2. Nominal pin length is 0.200 inches for CH1837A/8A. *3 Nominal pin length is 0.155 inches for CH1837F. 4. Nominal case tolerance ± 0.02 inches. 5. Nominal pin tolerance ± 0.03 inches. Figure 6. Physical Dimensions. Cermetek reserves the right to make changes in specifications at any time and without notice. The information furnished by Cermetek in this publication is believed to be accurate and reliable ...
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Cermetek Microelectronics, Inc. 2002 Cermetek Microelectronics, Inc. CH1837A/7F/8A Data Access Arrangement Module Page 9 Document No. 607-0014 Revision C2 (12/02) ...