DS21Q43A

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 CRC4formats
   8-bit parallel control port that can beconnected to either multiplexed or non-multiplexed buses
   Each of the four framers contains dual two-frame elastic stores that can connect toasynchronous orsynchronousbackplanes upto 8.192 MHz
   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
   Detects and generates AIS, remote alarm, andremote multiframe alarms
   Pin-compatible with DS21Q41B Quad T1Framer
   5V supply; low power CMOS
   Available in 128-pin TQFP
  Industrial (-40 to +85) grade versionavailable (DS21Q43ATN)


Pinout




Specifications

Voltage on Any Pin Relative to Ground .............. -1.0V to +7.0V
Operating Temperature ...............  ..0 to 70 for DS21Q43AT
Operating Temperature  ..........-40 to +85 for DS21Q43ATN
Storage Temperature  .................................... ..-55 to +125
Soldering Temperature  ............................260 for 10 seconds


Description

The DS21Q43A combines four of the popular DS2143 E1 Controllers onto a single monolithic die. The"A" designation denotes that some new features are available in the Quad version which were notavailable in thesingle E1 device. The added features in the DS21Q43A are listed in Section 1. TheDS21Q43A offers a substantial space savings to applications that require more than one E1 framer on acard. The Quad version is only slightly bigger than the single E1 device. All four framers in theDS21Q43A are totally independent; they do not share a common framing synchronizer. Also, the transmitand receive sides of each framer are totally independent. The dual two-frame elastic stores contained ineach of the four framers can be independently enabled and disabled as required. The DS21Q43A meetsall of the latest specifications, including CCITT/ITU G.704, G.706, G.962, and I.431 as well as ETS 300011 and ETS 300 233.