784 Kbps HDSL Data Pump Chip Set
Description
SK70704/SK70706
784 Kbps HDSL Data Pump Chip Set
Datasheet
The HDSL Data Pump is a chip set consisting of the following two devices: s SK70704 Analog Core Chip (ACC) s SK70706 HDSL Digital Transceiver (HDX)
The HDSL Data Pump is a 2-wire transceiver which provides echo-cancelling and 2B1Q line coding.
It incorporates transmit pulse shaping, filtering, line drivers, receive equalization, timing and data recovery to provide 784 kbps, clear-channel, “data pipe” transmission.
The Data Pump provides Near-End Cross-Talk (NEXT) performance in excess of that required over all ANSI and ETSI test loops.
Typical transmission range on 26 AWG (0.
4 mm) cable exceeds 13 kft (4 km) in a noise-free environment or 9.
5 kft (2.
9 km) with ANSI-specified noise levels.
The Data Pump meets the requirements of Bellcore TA-NWT-001210, ANSI T1 Technical Report No.
28-1994 and ETSI ETR-152.
It provides one end of a single-channel HDSL transmission system from the twisted pair interface back to the Data Pump/HDSL data interface.
The Data Pump can be used at either the HTU-R or the HTU-C end of the interface.
Applications
s T1 (2-pair) and fractional T1 transport s N-channel digital pair-gain
Product Features
s Wireless base station to switch interface s Campus and private networking
s Fully integrated, 2-chip set for interfacing to 2-wire HDSL lines at 784 kbps
s Single +5 V power supply
s Integrated line drivers, filters and hybrid circuits result in greatly reduced external logic and simplified support circuitry requirements
s Simple line interface circuitry, via transformer coupling, to twisted pair line
s Internal ACC voltage reference
s Converts serial binary data to scrambled 2B1Q encoded data
s Self-contained activation/start-up state machine for simplified single loop designs
s Programmable for either central office (HTU-C) or remote site (HTU-R) applications
s
s Compliant with:
s – Bellcore TA-NWT-001210
s – ANSI HDSL Technical Report No.
281994
s – ETSI ETR-152 (1995)
s – ITU G.
99...
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