The STMicroelectronics ST70235A is a DMT modem and ATM framer within the ASCOT chipset designed for CPE applications such as routers and stand-alone modems. It supports both ATM (UTOPIA Level 1 & 2) and bitstream interfaces, featuring a 16-bit multiplexed microprocessor interface compatible with little and big endian architectures.
The device operates over 256 carriers using DMT mapping/demapping and includes features like dual latency paths, fine timing recovery, and time domain equalization. It is fabricated in 0.25um HCMOS7 technology and packaged in a 144-pin TQFP.
| Technology Process | 0.25um HCMOS7 |
|---|---|
| Package Type | 144 Pin TQFP |
| Power Consumption (Typical) | 0.4 WATT |
| Supply Voltage (3.3V Rail) | 3.0 to 3.6 V |
| Supply Voltage (1.8V Rail) | 1.62 to 1.98 V |
| Total Power Dissipation (Typical) | 400 mW |
| Ambient Temperature Range | 0 to 70 °C |
It supports ANSI T1.413 Issue 2, ITU-T G.992.1 (G.DMT), and ITU-T G.992.2 (G.LITE).
The chip supports either ATM at UTOPIA Level 1 & 2 or a bitstream interface.
The order code listed in the document is 8T70235A.