CD74FCT2245TQM

Overview

The CD74FCT2245TQM is an octal bus transceiver manufactured by Harris Corporation, belonging to the FCT logic series. It features a single functional unit with eight bits per element and provides true (non-inverting) output characteristics. The device utilizes CMOS technology and incorporates three-state outputs with series resistors for effective signal driving. It operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. The component is housed in a 20-SSOP package with a width of 3.90 mm and is rated for an operating temperature range from -40°C to +85°C.

Feature Summary

• Octal bus transceiver architecture providing bidirectional data transfer capability across eight channels.
• Non-inverting signal polarity ensures direct logical correspondence between input and output states.
• Three-state output configuration allows multiple devices to share common bus lines without interference.
• Integrated series resistors in the output stage enhance signal integrity and drive performance.

Applications

• High-speed data bus interfaces in embedded systems
• Memory buffer applications requiring non-inverting signal paths
• I/O expansion modules utilizing standard TTL-compatible logic levels

Procurement Notes

Verify the specific manufacturer origin, as Harris Corporation assets were acquired by Texas Instruments. Confirm that the 20-SSOP package matches the required footprint dimensions of 3.90 mm width. Ensure compatibility with the specified 4.75 V to 5.25 V supply voltage range and check for RoHS compliance status relative to current manufacturing standards.

Selection Notes

Select this component when an octal, non-inverting bus transceiver is required for TTL-to-CMOS interfacing. The FCT series offers faster propagation speeds compared to standard HCT logic. Ensure the design accommodates the 20-SSOP package constraints and verify that the system power supply remains strictly within the 4.75 V to 5.25 V operational limits to maintain timing specifications.

Part Context

This part belongs to the CD74FCTxxxyy family of high-speed CMOS logic devices originally developed by Harris Corporation. These components are designed for high-performance digital applications requiring low power consumption and fast switching speeds. The FCT series bridges the gap between standard TTL logic levels and CMOS noise immunity, making it suitable for complex digital systems.

Replacement Considerations

Texas Instruments CY74FCT2245TSOCT and CY74FCT2245ATPC are functionally equivalent octal bus transceivers. Verify package compatibility, as TI offers SOIC and PDIP variants which differ physically from the SSOP form factor of the Harris original.