74HCT299D,653

Shift Registers Overview

The 74HCT299D,653 is an 8-bit universal shift register from the HCT logic family. It features multiplexed inputs and outputs to improve bit density and supports four operating modes: shift left, shift right, hold, and load data. The device includes 3-state outputs that can drive bus lines directly and is cascadable for n-bit word lengths. It operates with output enable or at a high-impedance OFF-state.

Shift Registers Feature Summary

• Multiplexed input/output structure enhances bit density
• Supports shift left, shift right, hold, and parallel load modes
• 3-state outputs facilitate direct bus line driving
• Cascadable design allows expansion for n-bit word lengths

Shift Registers Applications

• Data storage in digital systems
• Serial-to-parallel and parallel-to-serial conversion
• Bus interface circuits requiring tri-state control

Shift Registers Procurement Notes

Verify the specific suffix 653 indicates tape and reel packaging when sourcing. Confirm RoHS compliance status as per current manufacturer documentation. Check availability as distribution channels may vary. Ensure the component matches the HCT series voltage requirements for your system design before procurement.

Shift Registers Selection Notes

Select this component when an 8-bit universal shift register with 3-state outputs is required. It is suitable for designs needing multiplexed I/O to save pin count. Verify compatibility with Low-power Schottky TTL (LSTTL) pinouts if replacing legacy components. Ensure the HCT logic level matches the system supply voltage.

Shift Registers Part Context

This part belongs to the 74HCT series of high-speed Si-gate CMOS devices. These components are designed to be pin-compatible with Low-power Schottky TTL (LSTTL) devices. The series is specified in compliance with JEDEC standard no. 7A, ensuring interoperability with other standard logic families in mixed technology systems.

Shift Registers Replacement Considerations

The 74HC299 is a compatible alternative within the same functional family. Verify that the HC series voltage range aligns with the HCT specifications required by the application circuit.