78P2243

· Triple channel transmit and receive interface for E3, DS3 and STS-1 applications
· Interface to 75 ohm coaxial cable over 1100 feet at speeds up to 51.84 Mbit/s
· Compliant with ANSI T1.102-1993, Telcordia GR-499- CORE and GR-253-CORE, ITU-T G.703, G.823 and G.824 for jitter tolerance and G.775 for loss of signal
· Compliant with ATM FORUM af-phy-0034 (E3 public UNI) and af-phy-0054 (DS3 public UNI)
· Easily Interfaced to ATM framer ICs such as PMC-Sierra 7345 , and 7346 QJET
· Receive DS3-high and DSX3 monitor signals
· Diagnostic loop-back for AMI and digital signals
· Selectable B3ZS/HDB3 ENDEC
· Receive Line Code Violation Detector
· 128-lead TQFP package
· 3.3V or 5V operation
· Input circuit works transformer or AC coupled

The 78P2243 is a triple channel version of the 78P2241. Each of the three ports is a line interface transceiver for E3, DS3, STS-1, North America T3 and ATM applications. It includes clock recovery and transmitter pulse shaping functions for applications using 75-ohm coaxial cable at distances up to 1100 feet. These applications include DSLAMs, T3/E3 digital multiplexers, SONET Add/Drop multiplexers, PDH equipment, DS3 to Fiber optic and microwave modems and ATM WAN access for routers and switches.

Each receiver of the 78P2243 recovers clock and data from a B3ZS or HDB3-coded AMI signal. The receiver can compensate for over 12dB of cable and 6dB of flat loss. The transmitter has a B3ZS/HDB3 ENDEC with a receive line code violation detector, a loop-back mode, a clockpolarity selection mode, and the ability to receive a DSX3 monitor signal. Signals generated meet the standard pulse shape requirements.

The 78P2243 is manufactured in an advanced BiCMOS process and operates at both 3.3V and 5V power supply voltages.