DALLAS Semiconductor, represented in Australia by Arrow Electronics , has released the DS26556, a multiport T1/E1/J1 transceiver with a cell/packet/TDM interface. It contains all the line interface and framer functions necessary to connect four T1, E1, or J1 lines.
No relays or switched external components are required and a single clock supports all standard T1, E1, or J1 operating modes. It supports UTOPIA (Level 2 and 3) and POS/PHY (Level 2 and 3) system interfaces, as well as a TDM backplane interface that can operate at bus rates up to 16.384MHz.
Additional features include software-selectable receive and transmit termination, one HDLC controller per port, programmable bit error-rate testing (BERT) and optional crystal-less jitter attenuation.
The DS26556 is available in a small 17mm x 17mm BGA package and is available in commercial (0ºC to +70ºC) and industrial (-40ºC to 85ºC) operating temperature ranges.