CD74ACT623E

Overview

The CD74ACT623E is an octal bus transceiver from the ACT series, manufactured by Harris Corporation. It features true outputs and operates with a BICMOS process in a 20-pin DIP package. The device supports bidirectional data transfer with independent output enable controls for each direction. It is designed for high-speed applications with a typical propagation delay of 1V at VCC = 5V and TA = 25°C. The component handles 8-bit data width and includes 3-state outputs to facilitate efficient bus management in digital systems.

Feature Summary

• Bidirectional data transfer capability with independent control for each direction
• True output polarity ensuring direct signal transmission without inversion
• 3-state output configuration allowing multiple devices to share a common bus
• BICMOS technology integration for enhanced speed and performance

Applications

• High-speed data bus interfaces in computing systems
• Memory module data routing and buffering
• Industrial control system signal isolation
• Communication interface adapters requiring bidirectional flow

Procurement Notes

Verify the manufacturer origin as Harris Corporation, noting that corporate assets may have been acquired by other entities such as L3Harris Technologies. Confirm the package type is PDIP-20 and check for RoHS compliance status, as older Harris parts may not meet current environmental standards. Ensure the ACT series designation matches specific voltage and speed requirements for your design.

Selection Notes

Select this component when an octal, bidirectional bus transceiver with true outputs is required. The ACT series offers faster switching speeds compared to standard 74FCT counterparts. Consider the 20-pin DIP package for through-hole mounting needs. Verify that the independent enable controls suit your bus arbitration logic and that the BICMOS output drive strength meets your load capacitance requirements.

Part Context

The CD74ACT623E belongs to the Harris ACT (Advanced CMOS Technology) family, known for high-speed operation compatible with TTL inputs. As an octal bus transceiver, it facilitates data movement between two 8-bit buses. The device is part of Harris's broader portfolio of logic ICs before industry consolidations. Its design emphasizes low power consumption and high noise immunity typical of advanced CMOS processes from that era.

Replacement Considerations

Check for equivalents from manufacturers like Texas Instruments or ON Semiconductor offering similar ACT-series octal bus transceivers. Ensure pin compatibility and electrical characteristics match, particularly propagation delay and output drive current. Verify that any substitute maintains the same 3-state behavior and independent enable functionality.