74AHCT594T16-13

Shift Registers Overview

The 74AHCT594T16-13 is an advanced high-speed CMOS device manufactured by Diodes Incorporated, 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. The component operates within a supply voltage range of 4.5V to 5.5V and provides push-pull outputs capable of sinking or sourcing 8mA at VCC = 4.5V. It features Schmitt trigger action at all inputs, allowing them to accept up to 6.0V. The device includes independent shift register reset (SHR) and storage register reset (STR) functions that are active low and independent of clocks.

Shift Registers Feature Summary

• Provides serial-to-parallel data conversion capabilities through its dual-register architecture.

Shift Registers Applications

• General purpose logic applications
• Serial to parallel data conversion
• Computer peripherals
• Appliances
• Industrial control systems

Shift Registers Procurement Notes

Verify the specific package type required for your design, as the 74AHCT594 series is available in both SO-16 and TSSOP-16 configurations. Confirm that the ordering suffix matches the desired physical footprint before finalizing procurement orders. Ensure compatibility with standard surface-mount assembly processes.

Shift Registers Selection Notes

Select this component when designing circuits requiring pin-compatible replacement for legacy 74LS devices while benefiting from modern CMOS performance characteristics. Consider the wide input voltage tolerance if interfacing with signals exceeding standard 5V logic levels. Evaluate the power dissipation requirements against the specified operating temperature range for thermal management.

Shift Registers Part Context

This part belongs to the 74AHCT logic family produced by Diodes Incorporated. It is specifically engineered to bridge the gap between older TTL-based designs and modern low-voltage CMOS technologies. The device maintains electrical compatibility with standard 5V logic systems while offering improved speed and lower power consumption compared to traditional LS counterparts.

Shift Registers Replacement Considerations

The datasheet explicitly states the device is designed to be pin compatible with 74LS low power Schottky types. Designers replacing legacy components should verify that the load conditions and signal integrity requirements of the original circuit are met by the AHCT specifications.

Shift Registers FAQ

How does the 74AHCT594 handle data shifting and storage?

Data enters the shift register via the DS pin on each positive transition of the SHCP clock. When STCP receives a rising pulse, the contents of the shift register are transferred to the storage register, which then asserts the data on the parallel outputs Q0-Q7.

What is the function of the Q7S pin?

The Q7S pin serves as the serial data output from the shift register. It is primarily used for cascading information between multiple 74AHCT594 devices to expand the number of available parallel outputs.