SN74ALS164ANSR

Shift Registers Overview

The SN74ALS164ANSR is an 8-bit parallel-out serial shift register from the Texas Instruments ALS logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 50 MHz. The device features AND-gated serial inputs (A and B) and an asynchronous clear input. Propagation delays are specified at a maximum of 20 ns for clear-to-output and 16 ns for clock-to-output transitions under standard load conditions.

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 function that resets all flip-flops to a low level independently of the clock signal.
• Provides fully buffered clock and serial inputs with diode clamping to minimize transmission-line effects.

Shift Registers Applications

• Serial-to-parallel data conversion in digital systems
• Bit shifting operations requiring gated data entry
• Parallel output generation from serial data streams

Shift Registers Procurement Notes

Verify the specific ordering suffix 'SR' corresponds to the SOP (NS) package variant containing 14 pins, as indicated in the packaging information. Confirm the active production status and RoHS compliance details directly with the manufacturer or authorized distributors before finalizing procurement specifications.

Shift Registers Selection Notes

Select this component when designing circuits requiring high-speed serial-to-parallel conversion using ALS logic levels. Ensure the application environment remains within the 0°C to 70°C operating temperature range and utilizes a 5 V power supply. Verify that the required propagation delay characteristics meet the system timing constraints.

Shift Registers Part Context

This part belongs to the SN74ALS164A series of 8-bit shift registers manufactured by Texas Instruments. It is designed for general-purpose digital logic applications where reliable serial data processing is required. The device is distinct from other variants by its specific package type and manufacturing revision.

Shift Registers Replacement Considerations

SN74ALS164AD

Shift Registers FAQ

How does the AND-gating mechanism affect data entry?

Data entry is inhibited if either serial input A or B is low, resetting the first flip-flop to low on the next clock pulse. Data enters only when both inputs are high.

What is the trigger condition for clocking data into the register?

Clocking occurs on the low-to-high-level transition of the CLK input.