Analog Devices DS21Q59 Product Info

• 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

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