Electronic Components Datasheet Search |
|
XRT91L80 Datasheet(PDF) 1 Page - Exar Corporation |
|
XRT91L80 Datasheet(HTML) 1 Page - Exar Corporation |
1 / 41 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com xr xr xr xr PRELIMINARY XRT91L80 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER MARCH 2005 REV. P1.0.4 GENERAL DESCRIPTION The XRT91L80 is a fully integrated SONET/SDH transceiver for SONET OC-48 allowing the use of Forward Error Correction (FEC) capability. The transceiver includes an on-chip Clock Multiplier Unit (CMU), which uses a high frequency Phase-Locked Loop (PLL) to generate the high-speed transmit serial clock from slower external clock references. It also provides Clock and Data Recovery (CDR) functions by synchronizing its on-chip Voltage Controlled Oscillator (VCO) to the incoming serial data stream. The chip provides serial-to-parallel and parallel-to- serial converters and 4-bit LVDS system interfaces in both receive and transmit directions. The transmit section includes a 4x9 Elastic Buffer (FIFO) to absorb any phase differences between the transmitter input clock and the internally generated transmitter reference clock. In the event of an overflow, an internal FIFO control circuit outputs an OVERFLOW indication. The FIFO under the control of the AUTORST pin can automatically recover from an overflow condition. The operation of the device can be monitored by checking the status of the LOCKDET and LOSDET output signals. An on-chip phase/ frequency detector and charge-pump offers the ability to form a de-jittering PLL with an external VCXO that can be used in loop timing mode to clean up the recovered clock in the receive section. APPLICATIONS • SONET/SDH-based Transmission Systems • Add/Drop Multiplexers • Cross Connect Equipment • ATM and Multi-Service Switches, Routers and Switch/Routers • DSLAMS • SONET/SDH Test Equipment • DWDM Termination Equipment FIGURE 1. BLOCK DIAGRAM OF XRT91L80 PISO (Parallel Input Serial Output) PFD & Charge Pump TxDI0P/N Serial Microprocessor Hardware Control TxDI1P/N TxDI2P/N TxDI3P/N TxCLKIP/N DLOOP RLOOPP RxDO0P/N RxDO1P/N RxDO2P/N RxDO3P/N RxCLKP/N WP RP SIPO (Serial Input Parallel Output) RLOOPS CDR Re-Timer CMU TXOP/N RXIP/N TXPCLKOP/N TXCLKO16P/N TRITXCLKO16 FIFO_RST FIFO_AUTORST TRIRXD RXCLK16P/N DISRD OC-48 TRANSCEIVER JTAG TDO TDI TCK TMS TRST |
Similar Part No. - XRT91L80 |
|
Similar Description - XRT91L80 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |