Exar Corporation XRT91L33
The XRT91L33 is a fully integrated multirate Clock and Data Recovery (CDR) device for SONET/SDH 622.08 Mbps STS-12/STM-4 or 155.52 Mbps STS-3/ STM-1 applications. The device provides Clock and Data Recovery (CDR) function by synchronizing its on-chip Voltage Controlled Oscillator (VCO) to the incoming serial scrambled non-return to zero (NRZ) data stream.| Part No. | XRT91L33 |
|---|---|
| Datasheet | XRT91L33 Download |
| Manufacturer |  Exar Corporation |
| Description | STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT |
| Buy | Stock & Price |
FEATURES
● Performs clock and data recovery for selectable data of 622.08 Mbps (STS-12/STM-4) or 155.52 Mbps (STS-3/STM-1) NRZ dataAPPLICATIONS
● SONET/SDH-based Transmission Systems● Add/Drop Multiplexers
● Cross Connect Equipment
● ATM and Multi-Service Switches, Routers and Switch/Routers
● Meets Telcordia, ANSI and ITU-T G.783 and G.825 SDH jitter requirements including T1.105.03 - 2002 SONET Jitter Tolerance specification, and GR-253 CORE, GR-253 ILR SONET Jitter specifications.
● Lock output pin monitors data run length and frequency drift from reference clock
● Data is resampled at the output
● Active High Signal Detect (SIGD) LVPECL input
● Low jitter, high-speed outputs support LVPECL and low-power LVDS termination
● DSLAMS
● SONET/SDH Test Equipment
● DWDM Termination Equipment
GENERAL DESCRIPTION
Figure 1 shows the block diagram of the XRT91L33.● 19.44 MHz reference frequency LVTTL input
● Low power: 215 mW typical
● 3.3V power supply
● 20-pin TSSOP package
● Requires one external capacitor
● PLL bypass operation facilitates board debug process
● ESD greater than 2kV on all pins FIGURE 1.
