DS2151, DS2153 Interfacing to the Brooktree Bt8221 and Bt8222

Abstract: This application note shows connection of the DS2151 T1 single chip transceiver and DS2153 E1 single chip transceiver to the Brooktree Bt8221 and Bt8222 (ATM Receiver/Transmitter w/UTOPIA).

  1. Bt device is programmed for a "framed" input (i.e., Unframed Input control bit = 0).
  2. RSYNC is programmed to output a frame sync; TSYNC is programmed to input a frame sync.
  3. Receive and transmit electric stores are disabled.
  4. A "loop-timed" application is shown.
  5. Timing is shown below: