E1 Quad Transceiver

The DS21Q59 E1 quad transceiver contains all the necessary functions for connecting to four E1 lines. The DS21Q59 is a direct replacement for the DS21Q50, with the addition of signaling access and improved interrupt handling. It is composed of a line interface unit, framer, and a TDM backplane interface, and is controlled through an 8-bit parallel port configured for Intel or Motorola bus operations or serial port operation.

Applications

* DSLAM Backplane * IMA and WAN Equipment * Routers/Switches

* Four Complete E1 (CEPT) PCM-30/ISDN-PRI Transceivers

* Pin Compatible with the DS21Q50

* Long-Haul and Short-Haul Line Interfaces

* 32-Bit or 128-Bit Crystal-Less Jitter Attenuator

* Frames to FAS, CAS, and CRC4 Formats

* CAS/CCS Signaling Support

* 4MHz/8MHz/16MHz Clock Synthesizer

* Flexible System Clock with Automatic Source Switching on Loss-of-Clock Source

* Two-Frame Elastic-Store Slip Buffer on the Receive Side

* Interleaving PCM Bus Operation Up to 16.384MHz

* Configurable Parallel and Serial Port Operation

* Detects and Generates Remote and AIS Alarms

* Fully Independent Transmit and Receive Functionality

* Four Separate Loopback Functions

* PRBS Generation/Detection/Error Counting

* 3.3V Low-Power CMOS

* Large Counters for Bipolar and Code Violations, CRC4 Codeword Errors, FAS Word Errors, and E Bits

* Eight Additional User-Configurable Output Pins

* 100-Pin (14mm) LQFP Package