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XRT86SH221 Datasheet(PDF) 1 Page - Exar Corporation |
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XRT86SH221 Datasheet(HTML) 1 Page - Exar Corporation |
1 / 353 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com PRELIMINARY XRT86SH221 SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU MAY 2007 REV. P1.0.5 GENERAL DESCRIPTION The XRT86SH221 (Voyager-Lite) is a physical layer SDH to PDH mapper/demapper which enables E1 aggregation to STM-1 via standard VC-12 to AU-3 and TUG-3/AU-4 mapping protocols. Voyager-Lite supports all the framing, mapping and grooming functions required for STM-1 mapper applications. The device generates and terminates all SDH Regenerator Section, Multiplexer Section and Path Overhead including the low-order Virtual Container (VC) Path Overhead. E1 framing is transparent; therefore, the device neither generates nor terminates the E1 frame. A single Voyager-Lite performs mapping of 21 asynchronous E1 spans to either VC-12/TU-12/TUG- 2/ VC-3/AU-3/STM-0 or VC-12/TU-12/TUG-2/TUG-3/ STM-0. Mapping to STM-1 requires (3) Voyager-Lite devices with one acting as "master" framer and two acting as "slave" framers. In this configuration, Voyager-Lite performs all the necessary framing, pointer processing and mapping functions required for mapping of 63xE1 spans to either VC-12/TU-12/ TUG-2/VC-3/AU-3/STM-1 or VC-12/TU-12/TUG-2/ TUG-3/VC-4/AU-4/STM-1 as shown in the block diagram. FIGURE 1. SIMPLIFIED BLOCK DIAGRAM STM-1 SOH Processor JTAG Microprocessor STM-1 SOH Processor 21 Ch E1 Frame Sync Bit Retimer 21 Ch E1 Short Haul LIU Tx 21 Ch E1 Short Haul LIU Rx VC-12 Cross Connect 21x21 Rx VC-12 Cross Connect 21x21 Tx VC-12 Mapper + TU-12 Pointer Proc Rx VC-12 Mapper + TU-12 Pointer Proc Tx XRT86SH221 Voyager Lite SDH Path Proc (POH) TU-12 To TUG2 Rx VC3/ AU3 TUG3/ VC4/ AU4 Tx SDH Trans- Port Proc (SOH) Rx SDH Trans- Port Proc (SOH) Tx Telecom Bus Rx Telecom Bus Tx PLL E1, 2xE1 4xE1, 8xE1 8kHz Master Slave 19.44Mhz SDH OH Drop SDH OH Add Single Input Clock Reference JTAG Port Microprocessor Interface Recovered Line Clock Egress Ingress Telecom Bus or Serial Port Interface VC-4 POH Drop VC-4 P OH Add PACKAGE ORDERING INFORMATION PRODUCT NUMBER PACKAGE TYPE OPERATING TEMPERATURE RANGE XRT86SH221IB 388 PBGA -40°C to +85°C |
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