I90135

ITeX's I90135 is the DMT modem and ATM Framer of the Apollo series rate adaptive ADSL chipset. The I90135 is intended to be used in combination with I80134 analog front end. In addition, the control function of the chipset can be performed on a dedicated external controller (see figure 1.1) or on host/control software eliminating the need for a microcontroller (see figure 1.2).

The I90135 may be used in both ATU-C (central office) and ATU-R (remote) applications.

The chip provides both a cellbased UTOPIA level 1 and 2 ATM data interface to the host and a non-ATM synchronous bit stream. The I90135 performs the DMT modulation, demodulation, Reed-Solomon encoding, bit interleaving, and 4D trellis coding. The I90135 is in a 144-pin PQFP package.