XRT94L43 Datasheet | Exar

DESCRIPTION The XRT94L43 is an SDH to PDH physical layer processor with integrated SONET OC-12 and 12 DS3/E3 framing controller. The XRT94L43 contains an integral SONET framer which provides framing and error accumulation in accordance with ANSI/ITUT specifications. For a multiple channel DS3/E3 feature , each channel contains identical elements. The configuration of this device is through internal registers accessible via an 8-bit parallel, memory mapped, microprocessor interface. The SONET/SDH transmit and receive blocks are used to transmit/receive an STS-12/STM-4 signals or pose and depose 12, STS-1/DS3/E3 signals. The blocks operate at a peak internal clock speed of 77 MHz and support 8-bit internal data paths. The transmit and receive blocks are pliant with both SONET and SDH standards. The XRT94L43 performs all SONET transport and path overhead processing for use in broadband data transport applications. FEATURES - Single Chip solution for 12 DS3/E3 to SONET/SDH Mapping - Generates and terminates SONET section, line and path layers. - Provides SONET descrambling. frame scrambling and - Differential Line Interfaces - 8-bit microprocessor interface - Requires +2.5 and +3.3V power supplies with +5V input tolerance - -40°C to +85°C Operating Temperature Range - Available in a 516 Ball PBGA package APPLICATIONS - Network switches - Concentrators - Frame Relay Switches - SONET Customer Premises Multiplexers - Network Access Equipment - Test/Monitoring Equipment Exar Corporation 48720 Kato Road, Fremont CA, 94538 - (510) 668-7000 - FAX (510) 668-7017 - .exar. REV. 1.0.2 SONET/SDH OC-12 TO 12XDS3/E3 MAPPER FIGURE 1. BLOCK DIAGRAM OF THE XRT94L43 WHEN CONFIGURED IN SONET MODE Tx STM -4 Tx STM -4 SOH Processor SOH Processor Block Block Tx AU -4 Tx AU -4 Mapper/VC -4 Mapper/VC -4 POH POH Processor Processor Block Block Tx TUG -3 Tx TUG -3 Mapper / Mapper / VC -Tx 3 POH -3 VC -Tx 3 VC POH VC -3 Processor POH Processor POH Block Processor Block...