Rochester Electronics Logic - Shift Registers SN74ALS166D

The SN74ALS166D is a parallel-load 8-bit shift register compatible with most TTL logic families. It features buffered inputs to reduce drive requirements and input clamping diodes to minimize switching transients. The device supports both parallel and serial data input modes, selectable via the shift/load (SH/LD) input. In serial mode, data is shifted through the eight flip-flops with each clock pulse, while in parallel mode, data is loaded synchronously on the next clock pulse. The register includes gated clock inputs (CLK and CLK INH) and an overriding clear (CLR) input that resets all flip-flops to zero. It operates within a temperature range of 0¬8C to 70¬8C and is available in multiple package options, including SOIC and PDIP. The device is characterized by a complexity of 77 equivalent gates and is suitable for various applications requiring reliable data shifting and storage.