DS3 / E3 / STS-1 Line Interface U n i t w i t h J i t t e r A t t e n u a t o r. 7 8 P 2 3 4 2 J AT ( d u a l ) 7 8 P 2 3 4 3 J AT ( t r i p l e ) 7 8 P 2 3 4 4 J AT ( q u a d ) T h e F r o n t E n d o f B r o a d b a n d Te c h n o l o g y 78P234xJAT FEATURES – Transformer or AC-coupled with capacitors – Standards-based LOS function The 78P234xJAT is TDK Semiconductor’s next generation of Line Interface Unit with integrated Jitter Attenuator. It is designed and manufactured in state of the art CMOS process technology, delivering per port the industry's lowest power consumption line interface transceiver to the market. These devices provide the greatest flexibility, and offer lower cost solution to the network system designer. – Optional serial-port based mode selection and channel status monitoring – Receiver AGC corrects for up to 6dB of flat loss – Adaptive digital clock recovery (requires line-rate precision reference clock input) – Receive output clock maintains nominal line-rate frequency at all times – Fully integrated Jitter Attenuation function provided for all line rates (no external VCXO required) – Jitter Attenuator configurable for transmit or receive path PRODUCT DESCRIPTION The 78P234xJAT is a low-power, 2/3/4-port DS3/E3/STS1 transceiver IC with integrated Jitter Attenuator (JAT). It includes clock recovery and transmitter pulse shaping functions for applications using 75-ohm coaxial cable at distances up to 1200 feet long end-to-end or up to 750ft long from a DS3 cross connect. The receiver recovers clock and data from a B3ZS or HDB3 coded AMI signal. It can compensate for over 12dB of cable and 6dB of flat loss. The transmitter generates a signal that meets the standard pulse shape requirements. It has a selectable B3ZS/HDB3 ENDEC with a receive line code violation detector, a local and remote loop-back mode, an input STANDARDS – Compliant with ANSI T1.102-1993, Telcordia GR-499-CORE and GR253-CORE, ITU-T G.703, G.823 and G.824 for jitter tolerance and G.775 for loss of signal – Compliant with ATM FORUM afphy-0034 (E3 public UNI) and afphy-0054 (DS3 public UNI) – Compliant with TBR-24 1997 for E3 jitter transfer Block Diagram – Transmit line fault monitor – Requires no external currentsetting resistor or loop filter components – Single 3.3V supply operation receive MUX that can select a redundant channel, a clock polarity selection mode, and the ability to receive a DSX3 monitor signal. Controls Flags LBO E3 DS3 DLBK TXEN TPOS B3ZS / HDB3 Encoder TNEG TCLK – Available in 100TQFP RPOS RCLK TXNW LOUTP Pulse Shaper Jitter Attenuator RNEG Transmit Monitor LOUTN Attenuator ENDEC B3ZS / HDB3 Decoder Data Detector AGC Adaptive Equalizer LINP LINN MON TCLKP RCLKP Power Distribution Signal Detector Clock Recovery LOS RLBKA RLBKB PDTX PDRX CKREF Signals from Adjacent Port Port 1 CS SCK SDI SDO Control Registers Master Bias Generator CKREF Port 2 Port 3 Port 4 APPLICATIONS Contact TDK Semiconductor for the latest product information, to find a local sales representative, or to order a 2002 DATA ROM: – DSLAMs – T3/E3 digital multiplexers – SONET Add/Drop multiplexers [email protected] www.tdksemiconductor.com Telephone: 714-508-8800 Fax: 714-508-8875 – PDH equipment – DS3 to Fiber optic and microwave modems – ATM WAN access for routers and switches A low cost non-JAT version is available with the same features as above. The 78P2344/43/42 devices are available in 100-pin TQFP providing an easy upgrade path to 78P234xJAT. DS3/E3/STS-1 CMOS QUAD LIU INTERFERING TONE TEST Figure 1 Input Eye with 9dB SNR Figure 2 Recovered Eye with 9dB SNR Figure 1: shows the input eye when 9dB of Signal to Noise Ratio (SNR) is injected. The device is expected to still recover data when this amount of noise has been injected into the input. Figure 2: shows the recovered eye and demonstrates the ability of the device to reject the incoming noise and recovered the data. PRODUCT BRIEF: This product brief is provided to describe certain component. Although TDK SEMICONDUCTOR CORP. strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. This product brief is provided as is and without any express or implied warranties, including merchantability, fitness for a particular purpose and non-infringement. TDK Semiconductor Corp., 2642 Michelle Dr., Tustin, CA 92780 TEL (714) 508-8800, FAX (714) 508-8877, http://www.tdksemiconductor.com © 2002 TDK Semiconductor Corporation 05/30/02 - rev 1.0