54ACTQ245FMQB-R

Overview

The 54ACTQ245FMQB-R is a single-element, non-inverting bus transceiver manufactured by National Semiconductor. It features eight bidirectional data channels with three-state outputs, designed for high-speed data transfer applications. The device operates within a supply voltage range of 4.5V to 5.5V and utilizes a 20-lead Ceramic Flat Pack (CFP) package. It supports BICMOS-TTL logic levels and provides true output polarity. The component is classified as obsolete and is not RoHS compliant.

Feature Summary

• Bidirectional data transmission capability across eight independent channels
• Three-state output configuration allowing direct system bus interfacing
• Non-inverting logic function for signal integrity preservation
• Robust ceramic flat pack packaging for industrial environments

Applications

• High-speed memory buffer interfaces in legacy computing systems
• Bidirectional data bus drivers for industrial control modules
• Signal isolation between different logic voltage domains
• Data routing in military or aerospace avionics subsystems

Procurement Notes

Verify the obsolete status and RoHS non-compliance before procurement. Confirm the specific 20-CFP package variant matches your existing footprint requirements. Ensure compatibility with 4.5V to 5.5V supply rails. Check for lead-free alternatives if environmental regulations apply. Validate supplier authenticity due to the component's discontinued lifecycle status.

Selection Notes

Select this component only when a ceramic flat pack package is mandatory for thermal or mechanical reasons. Ensure the design requires a single 8-bit bidirectional transceiver with three-state outputs. Verify that the operating temperature range meets the application's environmental demands. Consider pin-compatible alternatives if plastic packages are acceptable.

Part Context

This part belongs to the 54ACT series of high-speed CMOS logic devices produced by National Semiconductor. The series is characterized by TTL-compatible inputs and fast propagation delays. The 54ACTQ245 variant specifically targets robust performance in demanding environments, utilizing ceramic packaging for enhanced durability compared to standard plastic equivalents.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status and specific CFP packaging, direct pin-for-pin replacements may require adapter solutions or redesign.