Overview

Product details

    The XL74HC165 device is an 8-bit parallel load shift register that, when clocked, shifts data toward the serial (Q-H) outputs. Parallel access to each stage is provided by eight separate direct data (A-H) inputs that are enabled by a low level at the shift/load (SH/LD) inputs. The XL74HC165 device also features a clock inhibit (CLK INH) function and a complementary serial (QH) output. Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and CLK INH is held low. The functions of CLK and CLK INH are interchangeable. Because a low clock and a low-to-high clock transition INH also accomplish clocking. CLK INH should only be changed to a high level when CLK is high. Parallel loading is inhibited when SH/LD is held high. When SH/LD is low, the parallel inputs of the register are enabled independently of the levels of the CLK, CLK INH, or serial (SER) inputs.