SN74HC595MPWREP

8位移位寄存器具有三态输出寄存器 8-BIT SHIFT REGISTERS WITH 3-STATE OUTPUT REGISTERS

The SN74HC595 contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. The storage register has parallel 3-state outputs. Separate clocks are provided for both the shift and storage register. The shift register has a direct overriding clear SRCLR input, serial SER input, and serial outputs for cascading. When the output-enable OE input is high, the outputs are in the high-impedance state.

Both the shift register clock SRCLK and storage register clock RCLK are positive-edge triggered. If both clocks are connected together, the shift register always is one clock pulse ahead of the storage register.