CopperGold™ Asymmetric Digital Subscriber Line(ADSL)Transceiver

The MC145650 is a single integrated circuit transceiver device for ANSI (American National Standard Institute) T1.413 category 2 ADSL modems1, based on the Discrete Multi-tone (DMT) line code. The category 2 specification requires payload rates of (6.144 Mbps + 640 kbps) downstream and 640 kbps upstream, with crosstalk, over carrier serving area (CSA) range loops, and to achieve (1.544 Mbps + 176 kbps) downstream and 176 kbps upstream with crosstalk, over selected ANSI integrated services digital network (ISDN) loops. The payload makeup is flexible thereby allowing multiple data streams to be multiplexed and demultiplexed.

• Designed for ANSI Standard ANS T1.413 Category 2 modems (ETSI DTR/TM-03050)
• Single Chip Integrated Transceiver for Reduced System Cost
• Single 3.3V ±5% Power Supply
• Estimated 2 Watt Power Dissipation
• Flexible Channel Multiplexing and Demultiplexing
• Framing and Deframing
• Central Office or Remote Configurable
• Maintenance Facilities
• Initialization Control
• CRC and Scrambling
• Interleaving
• Reed-Solomon Forward Error Correction
• Wei 4D Trellis Encoding and Decoding
• DMT Modulation and Demodulation
• DMT Echo Cancellation for ADSL
• A/D Conversion and Receive Path Filtering
• D/A Conversion and Transmit Path Filtering
• Adaptive Rate Mode (N x 32 kbps Channel Programmability)