text.skipToContent text.skipToNavigation


Parallel-Load 8-Bit Serial Shift Registers


Package | PIN: N | 16
Temp: C (0 to 70)
Carrier: Partial Tube
Qty Price
1-9 $0.86
10-24 $0.76
25-99 $0.71
100-249 $0.60
250-499 $0.56
500-749 $0.46
750-999 $0.36
1000+ $0.33


  • Complementary Outputs
  • Direct Overriding Load (Data) Inputs
  • Gated Clock Inputs
  • Parallel-to-Serial Data Conversion
  • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

Texas Instruments  SN74ALS165N

The 'ALS165 are parallel-load 8-bit serial shift registers that, when clocked, shift the data toward serial (QH and Q\H) outputs. 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 'ALS165 have a clock-inhibit function and complemented serial outputs.

Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/LD\ is held high and the clock inhibit (CLK INH) input is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH also accomplishes clocking, CLK INH should be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD\ is held high. The parallel inputs to the register are enabled while SH/LD\ is low independently of the levels of the CLK, CLK INH, or serial (SER) inputs.

The SN54ALS165 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS165 is characterized for operation from 0°C to 70°C.