The high-density architecture includes an integrated HDLC controller and JTAG port with 3.3V operation. The HDLC controller can be configured for Sa bits or DS0s and has large receive and transmit buffers that allow a full performance report message to be received or sent without host intervention. Combined with JTAG support, the total functional integration saves external programming effort and board space.
Dallas framers are available in a variety of densities that can combine to exactly meet a variety of application needs. All use interchangeable software, from 4-port to 16-port capacity and from first to latest generation, which enables the implementation of greater line capacity with minimal costs. Complementary T1 and E1 parts are pin-compatible so that one hardware design can support either environment.
The DS21FT40 is designed for telecommunications equipment that requires high port density, low power, and low cost per port. This includes frame relay, switching equipment, ATM, optical and electrical multiplexers, and SONET/SDH communications.