The MC10E/100E143 is a 9-bit holding register, designed with byte-parity applications in mind. The E143 holds current data or loads new data, with the nine inputs D0 – D8 accepting parallel input data.
   
• 700MHz Min. Operating Frequency
• 9-Bit for Byte-Parity Applications
• Asynchronous Master Reset
• Dual Clocks
• Extended 100E VEE Range of – 4.2V to – 5.46V
• 75kΩ Input Pulldown Resistors
   
    The SEL (Select) input pin is used to switch between the two modes of
    operation — HOLD and LOAD. Input data is accepted by the registers a
    set-up time before the positive going edge of CLK1 or CLK2. A HIGH on
    the Master Reset pin (MR) asynchronously resets all the registers to zero.