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. 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. The 100 Series contains temperature compensation.