DS92UT16TUF Datasheet | National Semiconductor

Description The DS92UT16 is a flexible UTOPIA to LVDS Bridge device. The LVDS Bridge transparently transports the UTOPIA bus over a high speed LVDS serial link. The device includes many reliability features such as an optional 1:1 protection and built in bit error rate checking. The parallel interface is user programmable for maximum flexibility. The user can choose between UTOPIA Level Level 2 ATM layer (master) of PHY layer (slave). The UTOPIALVDS Bridge supports a special MPHY (multi-PHY layer) operation mode. The MPHY operation supports up to 248 standard UTOPIA Level 2 PHY ports without adding external circuitry. The serial interface uses LVDS Serializer and Deserializer technology. The 16:1 bit serialization allows conveying the full-duplex parallel bus over two differential transmission pairs. This enables low cost backplanes and cables. Cable transmission length can be as long 16 meters. The serial link carries Flow control information (back pressure) in both directions. The Bridge device applies back pressure on a per queue basis over the 31 internal FIFO queues. In addition, the serial link includes an OAM (Operations and Maintenance) channel that does not detract from link performance. There are many applications where the UTOPIA-LVDS Bridge simplifies designs. Box-to-box connections can use DS29UT16 devices across cables. Access multiplexor applications can use the devices across a PCB backplane for point-to-point and lightly loaded multidrop configurations. - Two independent LVDS receiver serial ports for optional 1:1 protection - Main and redundant LVDS transmit ports - Loop timing capability enables LVDS recovered clock to internally drive LVDS transmit clock - Internal buffers allow maximum LVDS serial bit rate independent of UTOPIA clock rate Programmable UTOPIA interface - UTOPIA Level 2 up to 52 MHz - ATM layer or PHY layer interface - ATM layer interface can support up to 248 standard Level 2 PHY ports with no additional external circuitry....