Multiplexer (MUX) / Shift Register

Within a Serializer (Parallel-in Serial-out) system, this component serves as the core data processing unit. It first multiplexes multiple parallel input channels into a single data stream, then uses shift register functionality to sequentially output the data in serial format, enabling efficient data transmission and interface conversion. The component is designed for use in computer, electronic, and optical product manufacturing, where it facilitates the conversion of parallel data buses to serial interfaces, reducing the number of interconnects and simplifying PCB routing. Typical applications include sensor data acquisition, communication interfaces, and control systems where multiple parallel signals must be transmitted over a limited number of lines. The device integrates two fundamental digital logic functions: a multiplexer that selects one of several input channels based on control signals, and a shift register that stores and shifts data bits synchronously with a clock. This integration allows for compact and efficient data serialization. The component is fabricated on silicon and is available in a standard SOIC-16 package, with other package options possible. Key parameters include a channel count of 8 to 16, a data rate of 10 to 100 Mbps, a supply voltage of 3.3 to 5.0 V, TTL/CMOS input logic levels, a propagation delay of 5 to 20 ns, a listed operating temperature range of -40 to 85 °C that must be confirmed for the specific model; IEC 60068-2-1 and IEC 60068-2-2 are cold and dry-heat test methods and do not establish this range, an ESD tolerance of ±2000 V (HBM, per IEC 61000-4-2), a power dissipation of 50 to 200 mW, and an input capacitance of 3 to 10 pF. These values are reference ranges and must be verified for the specific model and application. The component is intended for use in industrial environments, and extended temperature ranges may be available on request. For design and procurement, it is essential to confirm the exact specifications with the legal manufacturer or supplier, as the directory does not guarantee compliance or performance.

The component operates by first selecting between multiple parallel input lines using multiplexer logic based on control signals. The selected parallel data is then loaded into a shift register, where clock signals control the sequential shifting of bits from the parallel register to a single serial output line, converting parallel data to serial format. The multiplexer section uses address or select lines to choose one of the input channels, and the shift register section synchronizes the output with the clock, ensuring proper timing. The process involves loading the parallel data into the register in parallel, then shifting it out bit by bit on each clock pulse. This allows for efficient serialization of data, with the output data rate determined by the clock frequency and the number of bits per frame.