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ACS103 Datasheet(PDF) 1 Page - Semtech Corporation |
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ACS103 Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 10 page ACS103 Issue 2.03 May 1996. 1 2 ACS103 - 3 Channel, Synchronous or Asynchronous Single Fiber Modem ACS103 Acapella Optical Modem IC 3 Channel, Synchronous or Asynchronous Single Fiber Modem Main Features: * Enables three full-duplex serial transmission channels through a single fiber optic cable, providing a virtual six fiber path. * Link lengths up to 5 km. * Uses a single Ping Pong LED (PPLED) to both transmit and receive data. * Supports 7 synchronous data rates up to 64 kbps or asynchronous data rates from DC to 19.2/ 9.6 kbps. * Supports three additional low frequency asynchronous channels or RS-232 handshake signals: RTS, CTS, DTR and DSR. * BER 10-9. * Digital mode, allowing the user to add an external amplifier. Also enables the ACS103 be used in non-fiber applications e.g. IR/RF. * ACS101 emulation mode giving 100 % compatibility with the ACS101. General Description: The ACS103 is a complete synchronous optical- modem controller/driver IC, supporting various user-programmable, full-duplex data-rates to 256 kbps over a single fiber. Alternatively, up to 3 channels of 64 kbps each can be carried. In 'Standard' mode, the fiber may be up to 2.5 km long, or up to 5 km in 'Double' mode. Communicating optical-modems automatically maintain synchronisation with each other such that the receive phase of one modem is lined-up with the transmit phase of the other, compensating for the propagation delay presented by the link. Link lengths from zero to maximum distance are catered for automatically. The ACS103 incorporates ACS101 functionality, with additional logic to support 3 channels. Inter-IC Encoding Technique The 3B4B encoding method is used for communication between ACS103s, thus ensuring that there is no DC component in the signal. The encoding and decoding is transparent to the user. DCDB RTS CTS DTR DSR XI3 XO3 RSS DR(1:4) DM(1:3) CKC SEL XI1 XO1 XI2 XO2 FIFO Compress FIFO Decompress Digital Filter TxD1 TxD2 TxD3 RS-232 Interface RxD1 RxD3 RxD2 RxCL TxCL GND VA+ VD+ Digital Filter LED Driver LED Receiver Control Logic GND PPLED LDN CNT TRC LDP 3B4B Decoder 3B4B Encoder XTAL Block diagram of ACS103 4 3 |
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