PURPOSE:To select any of non-inverting and inverting input data and to latch the operation result of input in the inside of a buffer by providing a control means selecting the input of the input data as it is and the input after processing to the input stage. CONSTITUTION:A transfer gate part consists of transfer gates 1, 1' and 2, 2' arranged symmetrically in terms of the circuit. The transfer gates 1, 1' and 2, 2' are provided to the input stage to select any of the non-inverting and inverting input data, and the input data (input address) is inputted as it is and latched or the inputted data is processed (e.g., brought into plus 1) and then inputted by controlling a signal given to each transfer gate thereby latching the data selectively (that is, switchingly).
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