CH1794A Cermetek Microelectronics, CH1794A Datasheet
CH1794A
Specifications of CH1794A
Related parts for CH1794A
CH1794A Summary of contents
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... By using built in compression algorithms the operation speed can be expanded to the maximum DTE rate of 57.6kbps for the CH1794A, 115.2kbps for the CH1799A and 230.4kbps for the CH2056A. A choice of error correcting schemes is available including MNP 10 for cellular telephone applications. The HS Modem or 57 ...
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... DAA designed for optimal performance over all PSTN line conditions thereby achieving the most reliable and best performance PSTN connections. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems The HS Modem family is designed to meet North American telephone standards as set by the FCC Part 68 (USA) and CSA CS-03 Part I (Canada) ...
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... S36 and S48 values. Cermetek, “AT Commands and S-Registers”, for a more detailed discussion. The HS Modem supports V.42 LAPM, MNP 2-4, MNP 10 error correcting protocols. The CH1794A uses MNP5 data compression techniques CH1799A/CH2056A uses V.42bis and V.44 data ...
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... Figure 3. Example of Zero Power Operation. The HS Modem can automatically determine the speed and format of the data sent from the DTE over the serial interface; and can sense the following broad range of speeds: CH1794A CH1799A This must be CH2056A The data formats in Table 1 are recognized by the HS Modem family of products ...
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... T1 during data operation will affect the HS Modem’s output being asserted from another 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems application, use a relay or zero impedance switch to disconnect T1 when in data mode. ...
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... Note that a 50 msec delay is required between escape characters. These two parameters can be modified via registers S2 and S12, respectively. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems The HS Modem family of products has been FCC Refer to Part 68 approved as data/FAX modems ...
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... Refer to the complete list in Table 6. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems INITIALIZING THE MODEM Before commands may be sent to the HS Modem, the modem must be initialized. This is a two step process: Step 1 ...
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... As an alternative, the CH1799A will operate on a leased line if the line is made wet by application of a activities voltage. Refer to Cermetek Application Note # 114 . Page 8 Hence, a CH1794A will connect this case, the IMPORTANT NOTE Result codes 165-194 are only CH179XA-L/CH2056A-L and and CH179XA-L/CH2056A-L and ...
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... NOTE: (1) If VCC has a slow power up ramp time, the internal reset may be ineffective. (2) Do not drive LED’s directly from any output. Use Buffers. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems HS Modem Family Pin Descriptions. FUNCTION Active LOW ...
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... If the dial command does not specify which type to use, the modem defaults to the type last specified. The power-on default value is T. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Example: Pulse dial 9, pause, touch-tone dial number. ...
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... Caller ID (CID) requires that the PSTN service provider supply the required data. feature will report the NULL string if the CID service is not activated by the PSTN service provider. 2007 Cermetek Microelectronics, Inc. PHONE LINE CONNECTION GUIDELINES 1. The HS Modem must be mounted in the final assembly such that it is isolated from exposure to any hazardous voltages within the assembly ...
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... Modem can be removed and then forwarded to Cermetek for repair. The following notice is recommended and should be included in the end product’s user manual. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems FOR YOUR USER’S MANUAL and The Part 68 rules require the following (or equivalent) ...
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... SPECS Prior to delivery, Cermetek installs into each HS Modem the following default Configuration Profile: Default Connect Speeds (DCE) are 14,400bps, 33,600bps and 57,600bps for CH1794A, CH1799A and CH2056A respectively Serial port data rate auto baud enabled Bell 212A operation at 1200bps Parity – none ...
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... X 54 +MRR: 19200 +MRR: 21600 +MRR: 24000 +MRR: 26400 +MRR: 28800 CARRIER 16800 CARRIER 21600 CARRIER 24000 CARRIER 26400 CARRIER 28800 +DR: ALT X X 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Table 4. Notes Result Code Form Terse or Short ...
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... Xn. A numeral indicates which more explicit message will be output for that X option. 2. Applicable to CH1799A and CH2056A models only. 3. Applicable to CH2056A models only. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Notes Command ...
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... Select modulation +MCR=n Carrier protocol n reporting +MR=n Select extended Reporting of +MCR and +MRR to DTE +MRR=m, n Report Transmit m and Receive n DCE rates to DTE 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Table 5. Command +PCW +PCM +PIG +PMH up, assumes +PMHF ...
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... Receive Data with n protocol +FRS=<time> Wait for silence +FTM=n Transmit Data with n protocol Figure 5. Schematic Illustrating Implementation of Voice Injection Feature. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Table 5. Function Command +FRH=n +FTH=n +FTS=<time> +FTS=n ...
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... Factory Default values that are different from the Firmware Default values are highlighted in BOLD. 4. Restore Factory Default values using Zn command. 5. Restore Firmware Default values using &Fn command. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Table 6. S-Register Summary. ...
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... Optional External Over Voltage and Lightning Protection. In most environments, the internal two terminal surge suppressor (see dashed Box 3) is adequate. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems For severe environments, use an external three terminal device with an earth ground as is shown in dashed Box 3 ...
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... Input Current (RST Capacitive Load (TXD, DTR, RTS) p Capacitive Load (RST) 1. Output Load = 50 pF ± one TTL. 2. With recommended 30k ohm external resistor. Maximum resistor range: 10k to 100k ohm. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Characteristic ...
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... Inter Character Delay Command Delay 100 Minimum Reset Pulse Duration Note: Must wait for modem response before issuing a new command. Name Type SPK O(DF) PIN NO 2007 Cermetek Microelectronics, Inc. Table 8. HS Modem Electrical Specifications. Typ. Max. Units 20 Ohm 25 dB 250V 100 0.0 +0 ...
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... Pin placement to outside case edge is nominal ± 0.100 inches. Figure 7B. Physical Dimensions ONLY for the CH179XA-B, CH2056A-B, CH179XA-L, CH2056A-L and CH179XAR-B, CH2056AR-B, CH179XAR-L, CH2056AR-L and extended temperature variations of listed products. 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Page 22 Document No. 607-0020 Revision B (01/07) ...
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... Full Function, 14.4kbps, FCC Part 68 Approved, UL 60950 Listed CH1794A ET-B Full Function, 14.4kbps, FCC Part 68 Approved, UL 60950 Listed, TBR21 Compliant CH1794A ET-C Full Function with Caller ID (CID), 14.4kbps, FCC Part 68 Approved, UL 60950 Listed CH1794A ET-H Full Function with Off-Hook Indication (OHI), 14.4kbps, FCC ...
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... Full Function with Zero Power Down, 56.0kbps, FCC Part 68 Approved, UL 60950 Listed CH2056A ET-CP Full Function with Caller ID (CID) and Zero Power Down, 56.0kbps, FCC Part 68 Approved, UL 60950 Listed 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Summary of Features Page 24 Operating Temperature -40° ...
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... Full Function, 14.4kbps, FCC Part 68 Approved, UL 60950 Listed CH1794AR ET-B Full Function, 14.4kbps, FCC Part 68 Approved, UL 60950 Listed, TBR21 Compliant CH1794AR ET-C Full Function with Caller ID (CID), 14.4kbps, FCC Part 68 Approved, UL 60950 Listed CH1794AR ET-H Full Function with Off-Hook Indication (OHI), 14.4kbps, FCC ...
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... Full Function with Zero Power Down, 56.0kbps, FCC Part 68 Approved, UL 60950 Listed CH2056AR ET-CP Full Function with Caller ID (CID) and Zero Power Down, 56.0kbps, FCC Part 68 Approved, UL 60950 Listed 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Summary of Features Page 26 Operating Temperature -40° ...
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... Therefore, for FCC and IC Approved or Approvable devices, the user assumes all risk for maintaining compliance to registration. 1390 BORREGAS AVENUE | SUNNYVALE CA 94089 CERMETEK WEB SITE: 2007 Cermetek Microelectronics, Inc. CH179XA/2056A High Speed Family of Ultra Small Modems Table 11A and 11B Notes: | LOCAL: 408-752-5000 | TOLL FREE: 1-800-882-6271 http://www ...