A multifunctional high-speed switch element for ATM applications

Describes a one-chip 16*8 switch element SE16/8 based upon the shared buffered concept. The device´s data inputs/outputs work at a data rate of 175.8 Mb/s, and its central clock inputs at a frequency of 351.6 MHz. To achieve the high system flexibility demanded, the circuit is equipped with many powerful functions: bit-phase alignment, a priority handling feature, a logic circuit, and a RAM self-test option. The SE16/8 was designed in a state-of-the-art 1- mu m CMOS technology comprising 770000 transistors on a chip area of 216 mm². It was packed in a frequency-matched ceramic multilayer quad flat package to cope with the high power (3 W) and speed requirements. The first switching modules built up with the SE 16/8 have already shown the functional superiority of the device presented.