74AC245SCX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74AC245SCX is an octal bidirectional bus transceiver from the 74AC logic series, housed in a 20-pin SOIC package. It features non-inverting data transfer with three-state outputs and operates within a supply voltage range of 2 V to 6 V. The device supports TTL input and output levels, ensuring compatibility with standard logic families. Key electrical parameters include a maximum propagation delay of 7 ns at load capacitance (CL), high-level output current of -75 mA, and low-level output current of 75 mA. It functions reliably across an operating temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bidirectional data path supporting simultaneous eight-bit transmission between A and B ports
• Three-state outputs allowing connection to shared bus systems without signal contention
• TTL-compatible input and output levels for seamless integration with standard logic devices
• High drive capability with 75 mA source/sink currents for robust signal integrity

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data bus interfacing
• Microprocessor system address and data buses
• Industrial control system communication links
• Portable battery-powered equipment requiring wide voltage operation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'SCX' corresponds to the SOIC-20 tape-and-reel packaging configuration as documented by onsemi. Confirm that the order quantity aligns with the manufacturer's standard reel size requirements to avoid additional handling fees or cut-tape premiums. Ensure the procurement documentation explicitly references the 74AC logic family specifications rather than generic AC/ACT equivalents.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a wide 2V to 6V supply range is required, distinguishing it from fixed-voltage ACT variants. The 7ns propagation delay offers higher speed performance compared to standard 74HC series counterparts. Verify that the 75mA output current rating meets the load requirements of the destination circuitry. Ensure the SOIC-20 footprint matches the PCB design constraints for surface-mount assembly.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74AC (Advanced CMOS) family, providing faster switching speeds than standard 74C devices while maintaining CMOS power efficiency. The 74AC245 variant specifically addresses high-speed bidirectional data routing needs. It serves as a critical interface element in digital systems where data direction must be dynamically controlled via the T/R pin while maintaining bus isolation through the OE pin.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The 74AC245N is a verified equivalent offering identical logical functionality in a DIP-20 package. For lead-free compliance verification, the MC74AC245DWR2G provides the same octal transceiver characteristics in a SOIC-20 W (wide) package. Cross-reference datasheets to confirm pinout compatibility before substitution.