6-/8-/12-Channel DS3/E3 Framers

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.

Applications

* Access Concentrators * ATM and Frame Relay Equipment * Digital Cross-Connects * PDH Muxes * Routers/Switches * SONET/SDH Muxes

* 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)

* 3.3V Supply with 5V Tolerant I/O

* 349-Pin, 27mm x 27mm BGA Package

* IEEE 1149.1 JTAG Support