TI SN74HC165NSR

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.

• Wide Operating Voltage Range of 2V to 6V
• Outputs Can Drive Up to 10 LSTTL Loads
• Low Power Consumption, 80 - μA Maximum ICC
• Typical tpd = 13 ns
• ± 4 - mA Output Drive at 5V
• Low Input Current of 1μA Maximum
• Complementary Outputs
• Direct Overriding Load (Data) Inputs
• Gated Clock Inputs
• Parallel- to- Serial Data Conversion

• Programmable Logic Controllers
• Appliances
• Video Display Systems
• Output Expander
• Keyboards