ch1786nh ETC-unknow, ch1786nh Datasheet
ch1786nh
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ch1786nh Summary of contents
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... Low power operation with automatic reduced power standby mode • Automatic equalization • Size: 1.01 ”x 1.27 ”x 0.52 ”(nominal) • NVRAM allows storage of custom configurations and telephone numbers CH1786 FAMILY CH1786 CH1786ET CH1786NH and ringer Figure 2. Voice/ Data Port Control Page 1 Standards CCITT V.22bis,V.22,Bell adaptive and ...
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... The individual NVRAM telephone number storage locations are selected by specifying 0,1,2,or 3. command will cause the modem to dial the stored telephone number in location n. NVRAM is not available on the CH1786LC or CH1786NH. 2003 Cermetek Microelectronics, Inc. SUPPORT FEATURES AT Command Set. A 40-character command line is supported. ...
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Cermetek Microelectronics, Inc. upon an input low signal on the TXD pin. ATS24=255 disables the Sleep Mode and is the default if no value is set in register S24. A SLEEP output signal is available to control power to external ...
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... Voice/DTMF Tone Port requires further registration. FCC will require that the system, including the CH1786 and the handset or DTMF transceiver, adhere to Part 68 rules. Voice/Tone Injection is not active on CH1786NH. Typically, voice communication would precede data communications. For this case, the following ...
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Cermetek Microelectronics, Inc. Reset. Upon applying power to the CH1786, the CH1786 automatically generates an internal reset pulse. The user may also reset the modem externally by applying a high-going reset pulse to the RST pin for at least 10ms ...
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Cermetek Microelectronics, Inc. Figure 5. CH1786 Application Diagram 2003 Cermetek Microelectronics, Inc. CH1786 Family of Ultra Small 2400bps Modems Page 6 Document No. 607-0004 Revision L1 (06/03) ...
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... RXA O ANALOG VOICE INJECTED. Receive Signal. Let float if not used. Not active in CH1786NH. 4 TXA I ANALOG VOICE INJECTED. Transmit Signal. Let float if not used. Not active in CH1786NH. 5 SPK O SPEAKER. Audio output for speaker. See speaker control schematic in Figure connection. 7 ...
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Cermetek Microelectronics, Inc. Table 2. CH1786 Pin Descriptions Continuation PIN NAME TYPE SPEED INDICATION. HIGH speed select output. A low on this pin indicates the modem is operating at 2400bps. 19 VCC - POWER SUPPLY. 5 volts ...
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Cermetek Microelectronics, Inc. Result response to this command, the CH1786 dials the telephone number “123-4567” and then waits for a carrier from the distant modem. detected within a given time (the default time is 30 seconds), the CH1786 ...
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... Bit Mapped Options Register Note In Tables 4, 5, 6A- signifies parameters that are stored in NVRAM upon receipt of the &W command. The CH1786LC, CH1786NE and CH1786NH do not contain NVRAM and, therefore, do not support data storage after power down. A detailed definition of all commands and registers is available Microelectronics, Inc ...
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... CH1786 to a PCB are discussed below. Direct Soldering. soldered. sealed (except the CH1786LCNE, CH1786NE, and The traces should CH1786NH) and will not be harmed by industry standard wave soldering processes. recommends against exposing the non-hermetic CH1786LCNE, aqueous based rinsing processes. Socketing. ...
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... Microelectronics, Incorporated, prior to delivery of the CH1786. Async mode selected 2400bps Bell 212A operation at 1200bps Even parity Auto answer enabled (Disabled on CH1786NH) If theses Command echo ON All result codes enabled –extended Wait for dial tone before dialing =2 seconds Detects busy signal Full word result codes ...
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... FCC Part 68 approval for all CH1786 Products CH1786NH). 2003 Cermetek Microelectronics, Inc. B. For CH1786NH, the required surge protection C. In most environments, 2 terminal surge 3. EMI/RFI Suppression. No external EMI/RFI noise suppression circuitry is required to maintain conveyed FCC Part 68 approval. required for other reasons, may be added as described below in Sections 3A-3B without adversely affecting FCC Part 68 approval ...
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Cermetek Microelectronics, Inc. Table 7. CH1786 System Data Mode Compatibility Specifications. Parameter Asynchronous 2400, 1200 600 bps character asynchronous. 0-300 bps asynchronous Asynchronous Speed TXD may differ +1%, -2.5% Range from modem output. Offsets will be corrected by adding/ deleting ...
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Cermetek Microelectronics, Inc. Table 8. CH1786 Electrical Specifications. Parameter V Positive Supply Voltage- Noise less than 50mV CC I Off Hook Nominal Operating Current when modem is OFF Hook Hook Nominal Operating Current when modem is ON ...
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Cermetek Microelectronics, Inc. Table 10. Other Performance Specifications. Parameter Minimum nd Tone 2 Harmonic Distortion DTMF Twist (Balance) DTMF Tone Duration 50 Pulse Dialing Rate 8 Pulse Dialing Make/ Break Pulse Dialing Make/ Break Pulse Interdigit Interval 700 Guard Tone ...
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Cermetek Microelectronics, Inc. PIN NO Figure 8. CH1786 Physical Dimensions. 2003 Cermetek Microelectronics, Inc. Table 12. CH1786 Pin Functions. PACKAGE CONNECTION TABLE FUNCTION PIN NO. RING TIP RXA TXA ...
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... CH1786NE Full function, Voice/Inject, NVRAM, FCC Part 68 approved, UL 1950 Listed, Non-Hermetic CH1786NH Full function, FCC Part 68 Approved, Non-Hermetic, Listed UL 1950 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. However, Cermetek assumes no responsibility for its use, or for any infringements of patents or other rights of third parties resulting from its use ...