SN74ALS164AD

Shift Registers Overview

The SN74ALS164AD is an 8-bit parallel-out serial shift register from the Texas Instruments ALS logic family. It features AND-gated serial inputs (A and B) and an asynchronous clear input. The device operates on a low-to-high clock transition, shifting data into eight flip-flops with outputs QA through QH. It is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package. Recommended operating conditions specify a supply voltage range of 4.5 V to 5.5 V and an operating temperature range of 0°C to 70°C.

Shift Registers Feature Summary

• Features AND-gated serial inputs that allow control over incoming data entry by inhibiting new data when either input is low.
• Includes an asynchronous direct clear input that resets all flip-flops to a low level independently of the clock signal.
• Provides fully buffered clock and serial inputs to minimize transmission-line effects and ensure stable signal reception.

Shift Registers Applications

• Serial-to-parallel data conversion
• Bit-shift operations in digital logic circuits
• Controlled data entry systems requiring input gating

Shift Registers Procurement Notes

Verify component status as obsolete for the SN74ALS164AD variant. Confirm availability of active replacements such as the SN74ALS164ADR or SN74ALS164AN. Ensure procurement sources provide original manufacturer documentation to validate authenticity and technical specifications before integration.

Shift Registers Selection Notes

Select this component for applications requiring an 8-bit shift register with dual gated serial inputs. Verify compatibility with the 4.5 V to 5.5 V supply voltage range. Consider the SOIC package dimensions for PCB layout constraints. Evaluate the 0°C to 70°C operating temperature range against environmental requirements.

Shift Registers Part Context

This part belongs to the SN74ALS164A series of 8-bit parallel-out serial shift registers. The 'D' suffix indicates the plastic small-outline package type. The ALS designation signifies the Advanced Low-power Schottky logic family, which offers faster switching speeds compared to standard LS logic while maintaining lower power consumption.

Shift Registers Replacement Considerations

The SN74ALS164ADR and SN74ALS164AN are confirmed active production substitutes within the same product family. These alternatives maintain identical logical functionality and pinout configurations suitable for direct replacement in existing designs.