ADSL DMT Transceiver/ATM Framer Digital Controller Chip
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
or on host/control software eliminating the need for a microcontroller.
The I90135 may be used in both ATU-C (central office) and ATU-R (remote)
applications. The chip provides both a cell based
UTOPIA level 1 and 2 ATM data interface to the host and a non-ATM synchronous
The i90135 is compliant with ANSI T1.413 Issue 2, ITU G.dmt
and G.lite standards. i90135 is available in a 144-pin PQFP package.
ANSI T1.413 Issue 2 standard DMT modem with embedded, bypassable,
Byte interface or standard Utopia level 1and level 2 ATM interfaces
Rotor and adaptive frequency domain equalizing
Demapping of DMT carriers into a digital bitstream, including
Error and noise monitoring on individual carriers and pilot