The DS3146/DS3148/DS31412 (DS314x) devices include all necessary circuitry to frame and format up to 12 separate DS3 or E3 channels. Each framer in these devices is independently configurable to support M23 DS3, C-Bit Parity DS3, or G.751 E3. The framers interface to a variety of line interface units (LIUs), microprocessor buses, and other system components without glue logic. Each DS3/E3 framer has its own HDLC controller, FEAC controller, and BERT, as well as full support for error detection and generation, performance monitoring, and loopbacks.
Key Features
Applications/Uses
6/8/12 Independent DS3/E3 Framers on a Single Die
Framing and Formatting to M23 DS3, C-Bit Parity DS3, and G.751 E3
LIU Interface can be Binary (NRZ) or Dual-Rail (POS/NEG)
B3ZS/HDB3 Encoder and Decoder
Generate and Detect DS3/E3 Alarms
Integrated HDLC Controller for Each Channel
Integrated FEAC Controller for Each Channel
Integrated Bit Error-Rate Tester (BERT) for Each Channel
Large Performance-Monitoring Counters
Line, Diagnostic, and Payload Loopbacks
Externally Controlled Transmit Overhead Insertion Port
Support External Timing or Loop-Timing
Framers can be Powered Down When Not Used
8-Bit Processor Port Supports Muxed or Nonmuxed Bus Operation (Intel or Motorola)
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