TDA4092

      The TDA4092  has the following features including rom mask option;standard configuration for 2 DIGIT 7-segment led to present the numbers 1 to 32;ttl compatible inputs etc.
      The initialization and resynchronization methods described in their respective sections are the fastest ways to establish the link between the Serializer and Deserializer. However, the TDA4092 can attain lock to a data stream without requiring the Serializer to send special SYNC patterns. This allows the SCAN921226H to operate in open-loop applica- tions. Equally important is the Deserializers ability to support hot insertion into a running backplane. In the open loop or hot insertion case, we assume the data stream is essentially random. Therefore, because lock time varies due to data stream characteristics, we cannot possibly predict exact lock time. However, please see Table 1 for some general random lock times under specific conditions. The primary constraint on the random lock time is the initial phase relation be- tween the incoming data and the REFCLK when the Dese- rializer powers up. As described in the next paragraph, the data contained in the data stream can also affect lock time. If a specific pattern is repetitive, the Deserializer could enter false lock - falsely recognizing the data pattern as the clocking bits. We refer to such a pattern as a repetitive multi-transition, RMT. This occurs when more than one Low- High transition takes place in a clock cycle over multiple cycles. This occurs when any bit, except DIN 9, is held at a low state and the adjacent bit is held high, creating a 0-1 transition. In the worst case, the Deserializer could become locked to the data pattern rather than the clock. Circuitry within the SCAN921226H can detect that the possibility of false lock exists.
      The TDA4092 provides ultrastable +4.500V output with 0.4500 mV (.01%) initial accuracy and a temperature coefficient of 0.6 ppm/C.This improvement in accuracy is made possible by a unique, patented multipoint laser compensation technique developed by Thaler Corporation. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regulation, and long-term stability, making the VRE304 series the most accurate reference available in the standard 8 pin DIP package.