CY74FCT543CTQCT

Overview

The CY74FCT543CTQCT is an octal bus transceiver manufactured by Texas Instruments, belonging to the 74FCT logic series. It features a single circuit with eight bits per element and provides three-state outputs. The device operates within a supply voltage range of 4.75V to 5.25V and supports output currents of 32mA for high state and 64mA for low state. It is housed in a 24-SSOP package with a width of 3.90mm and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides non-inverting data transmission between two buses with tri-state control capability
• Supports TTL-compatible input and output voltage levels for system integration
• Delivers strong drive current capabilities suitable for bus line driving applications

Applications

• Memory mapping controllers
• Clock drivers
• Bus-oriented transmissions

Procurement Notes

Verify component authenticity through authorized channels as this part is marked as obsolete by the manufacturer. Confirm package integrity upon receipt due to moisture sensitivity classification level 2. Cross-reference datasheet revisions to ensure compatibility with existing design specifications before final procurement decisions.

Selection Notes

Select this component when designing systems requiring octal bidirectional data transfer with latching functionality. Ensure power supply constraints align with the specified 4.75V to 5.25V operational range. Consider thermal management requirements given the industrial temperature rating and surface mount packaging constraints for reliable long-term operation.

Part Context

This integrated circuit belongs to the Texas Instruments 74FCT family, which combines CMOS density with TTL speed. The CY74FCT543 variant specifically serves as a registered transceiver, distinguishing it from standard unregistered bus drivers. It shares functional similarities with other FCT transceivers but offers specific pinout and performance characteristics defined by its datasheet.

Replacement Considerations

Check for direct equivalents within the same FCT family or compatible successors from Texas Instruments. Verify pin-to-pin compatibility and electrical parameter alignment before substituting obsolete components in existing hardware designs.