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DS21Q44

Features: Four E1 (CEPT or PCM-30) /ISDN-PRIframing transceivers All four framers are fully independent;transmit and receive sections of each framerare fully independent Frames to FAS, CAS, CCS, and CRC4 formats Each of the four framers contain dual twoframe elastic store slip buffers that cancon...

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SeekIC No. : 004328814 Detail

DS21Q44: Features: Four E1 (CEPT or PCM-30) /ISDN-PRIframing transceivers All four framers are fully independent;transmit and receive sections of each framerare fully independent Frames to FAS, CAS, CCS, an...

DS21Q44 Data Sheet

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Part Number:
DS21Q44
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

  Four E1 (CEPT or PCM-30) /ISDN-PRIframing transceivers
   All four framers are fully independent;transmit and receive sections of each framerare fully independent
   Frames to FAS, CAS, CCS, and CRC4 formats
   Each of the four framers contain dual twoframe elastic store slip buffers that canconnect to asynchronous backplanes up to8.192 MHz
   8bit parallel control port that can be useddirectly on either multiplexed or nonmultiplexed buses (Intel or Motorola)
   Easy access to Si and Sa bits
   Extracts and inserts CAS signaling
   Large counters for bipolar and codeviolations, CRC4 code word errors, FASword errors, and E-bits
   Programmable output clocks for FractionalE1, per channel loopback, H0 and H12applications
  Integral HDLC controller with 64-byte buffersconfigurable for Sa bits or DS0 operation
  Detects and generates AIS, remote alarm,and remote multiframe alarms
  Pin compatible with DS21Q42 EnhancedQuad T1 Framer
  3.3V supply with 5V tolerant I/O; low powerCMOS
  Available in 128pin TQFP package
  IEEE 1149.1 support


Specifications

Voltage on Any Non-Supply Pin Relative to Ground ...................1.0V to +5.5V
Supply Voltage.......................................................................... .3V to +3.63V
Operating Temperature for DS21Q44T ..............................................0 to 70
Operating Temperature for DS21Q44TN .....................................40 to +85
Storage Temperature............................................................... 55 to +125


Description

The DS21Q44 E1 is an enhanced version of the DS21Q43 Quad E1 Framer. The DS21Q44 contains fourframers that are configured and read through a common microprocessor compatible parallel port. Eachframer consists of a receive framer, receive elastic store, transmit formatter and transmit elastic store. Allfour framers in the DS21Q44 are totally independent, they do not share a common framing synchronizer.

Also the transmit and receive sides of each framer DS21Q44 are totally independent. The dual two-frame elasticstores contained in each of the four framers can be independently enabled and disabled as required. Thedevice fully meets all of the latest E1 specifications including CCITT/ITU G.704, G.706, G.962, andI.431 as well as ETS 300 011 and ETS 300 233.




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