The SNx4HC165 devices are 8-bit parallel-load shift registers that, when clocked, shift the data toward a serial (QH) output. Parallel-in access to each stage is provided by eight individual direct data (A–H) inputs that are enabled by a low level at the shift/load (SH/LD) input. The SNx4HC165 devices also feature 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 CLK and a low-to-high transition of CLK INH also accomplish clocking, CLK INH must be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD is held high. While SH/LD is low, the parallel inputs to the register are enabled independently of the levels of the CLK, CLK INH, or serial (SER) inputs.
|VCC (Min) (V)|
|VCC (Max) (V)|
|Voltage (Nom) (V)|
|F @ Nom Voltage (Max) (Mhz)|
|ICC @ Nom Voltage (Max) (mA)|
|tpd @ Nom Voltage (Max) (ns)|
|IOL (Max) (mA)|
|IOH (Max) (mA)|
|Operating Temperature Range (C)|
|Catalog||Military||HiRel Enhanced Product||Automotive|
|-40 to 125||-55 to 125||-40 to 125||-40 to 125|
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