74AHCT594S16-13

Shift Registers Overview

The 74AHCT594S16-13 is an advanced high-speed CMOS device designed to be pin-compatible with 74LS low-power Schottky types. It functions as an 8-bit shift register with an 8-bit output register, accepting serial data from the DS input on each positive transition of the SHCP clock. The storage register captures data via the STCP pulse and asserts it on push-pull outputs Q0-Q7. It operates within a supply voltage range of 4.5V to 5.5V, sinks or sources 8mA at VCC=4.5V, and includes independent active-low reset functions for both registers.

Shift Registers Feature Summary

• Features Schmitt trigger action at all inputs and accepts up to 6.0V input levels.
• Includes independent active-low shift register reset (SHR) and storage register reset (STR) functions.
• Provides ESD protection exceeding specified thresholds for machine, human body, and charged device models.

Shift Registers Applications

• General purpose logic applications
• Serial to parallel data conversion
• Capture and hold data for extended periods
• Microcontroller peripheral line control

Shift Registers Procurement Notes

Verify the specific package suffix 'S16' corresponds to the SO-16 footprint required for your PCB layout. Confirm that the -13 suffix indicates standard tape and reel packaging quantities. Ensure the design accommodates the 4.5V to 5.5V operating voltage range and check for any RoHS compliance documentation requirements specific to your region.

Shift Registers Selection Notes

Select this component when pin compatibility with legacy 74LS devices is required alongside modern CMOS performance. It is suitable for designs needing independent control over shift and storage register resets. Consider the 8mA drive capability and wide input voltage tolerance if interfacing with varying signal levels within the specified supply constraints.

Shift Registers Part Context

This part belongs to the 74AHCT series, representing advanced high-speed CMOS technology compatible with TTL logic levels. Diodes Incorporated manufactures this family to bridge legacy system interfaces with modern low-power requirements. The S16 designation specifically identifies the surface-mount SO-16 package variant within this product line.

Shift Registers Replacement Considerations

Datasheet confirms pin compatibility with 74LS low-power Schottky types. Verify electrical characteristics such as propagation delay and drive current against original LS specifications to ensure functional equivalence in timing-critical circuits.

Shift Registers FAQ

How are the shift and storage registers controlled?

Data enters the shift register on the rising edge of SHCP. Data transfers to the storage register on the rising edge of STCP. Both registers have independent active-low reset inputs (SHR and STR).

What is the function of the Q7S pin?

Q7S provides a serial data output from the shift register, allowing information to be cascaded between multiple devices before it reaches the final parallel output register.