DS21Q42 - Dallas Semiconducotr

DS21Q42 Enhanced QUAD T1 FRAMER

The DS21Q42 is an enhanced version of the DS21Q41B Quad T1 Framer. The DS21Q42 contains four framers that are configured and read through a common microprocessor compatible parallel port. Each framer consists of a receive framer, receive elastic store, transmit formatter and transmit elastic store. All four framers in the DS21Q42 are totally independent, the.

Features

Four T1 DS1/ISDN
  –PRI/J1 framing transceivers All four framers are fully independent Each of the four framers contain dual two
  – frame elastic store slip buffers that can connect to asynchronous backplanes up to 8.192 MHz 8
  –bit parallel control port that can be used directly on either multiplexed or non
  – multiplexed buses (Intel or Motorola) Programmable output clocks for Fractional T1 Fully independent transmit and receive functionality Integral HDLC controller with 64-byte buffers configurable for FDL or DS0 operation Generates and detects in
  –band loop codes from 1 to 8 bits in length includin.