74ACQ245PC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ACQ245PC is an octal bidirectional transceiver utilizing FACT Quiet Series technology. It features eight non-inverting buffers with 3-STATE outputs and a 20-Lead Plastic Dual-In-Line (PDIP) package. The ACQ variant operates within a supply voltage range of 2.0V to 6.0V, while the ACTQ variant operates between 4.5V and 5.5V. Propagation delays are typically 5.0 ns at 5.0V for the ACTQ version. Outputs source and sink 24 mA, and quiescent current is reduced by 50% compared to standard devices.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Utilizes FACT Quiet Series /c165 technology to guarantee quiet output switching and improved dynamic threshold performance.
• Features GTO output control and undershoot corrector in addition to a split ground bus for superior noise immunity.
• Provides guaranteed simultaneous switching noise levels and pin-to-pin skew AC performance.
• Offers enhanced latch-up immunity and faster propagation delays than standard ACT245 devices.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented applications requiring bidirectional data transfer
• Driving bus lines or buffering memory address registers
• Systems requiring low simultaneous switching noise

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific logic family suffix when ordering. The 'ACQ' designation indicates the AC logic family, whereas 'ACTQ' denotes the ACT family with TTL-compatible inputs. Confirm that the PDIP package matches the required footprint. Ensure the operating voltage requirements align with the selected logic family specifications before procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select the 74ACQ245PC for general-purpose bus interfacing where wide voltage operation is required. Choose the 74ACTQ245PC if TTL input compatibility is necessary for the system design. Both variants offer identical physical packaging and pinouts. Consider the QUIET Series benefits for high-density designs sensitive to electromagnetic interference.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the Fairchild Semiconductor 74ACQ/ACTQ product line, which implements proprietary FACT Quiet Series technology. The series is designed to address noise issues common in high-speed CMOS logic. The PDIP package provides through-hole mounting options suitable for prototyping or legacy board designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The datasheet lists the 74ACTQ245SC as a similar alternative available from onsemi. Other manufacturers may offer equivalent octal bus transceivers, but verify pinout and electrical characteristics carefully.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the difference between the 74ACQ245PC and 74ACTQ245PC?

The primary difference is the input voltage threshold. The 74ACQ245PC accepts CMOS-level inputs, while the 74ACTQ245PC has TTL-compatible inputs. Both share the same package and output drive capabilities.

How does the Quiet Series technology benefit this device?

It guarantees lower simultaneous switching noise levels and improved dynamic threshold performance through GTO output control and a split ground bus structure.