SN74ABT18504PMR

Specialty Logic Overview

The SN74ABT18504PMR is an 18-bit universal bus transceiver from the Texas Instruments 74ABTH series, housed in a 64-pin LQFP package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. The device features non-inverting polarity with three-state outputs. Key electrical parameters include a maximum propagation delay of 5.2 ns at 50 pF load, high drive capability with -32 mA high-level and 64 mA low-level output currents, and operation across a temperature range of -40 °C to +85 °C.

Specialty Logic Feature Summary

• Provides 18-bit bidirectional data transfer capability for high-density bus architectures
• Features three-state outputs to facilitate direct connection to system buses without external drivers
• Supports TTL-compatible logic levels for seamless integration with standard digital interfaces

Specialty Logic Applications

• High-speed memory bus interfacing
• Data acquisition systems requiring wide parallel data paths
• Industrial control networks with multiple I/O channels

Specialty Logic Procurement Notes

Verify the specific suffix 'PMR' corresponds to the tape-and-reel packaging variant when ordering. Confirm that the required operating voltage aligns with the 4.5 V to 5.5 V specification. Ensure the design accommodates the moisture sensitivity level indicated in the datasheet. Check for any recent lifecycle notices or recommended replacements from the manufacturer before finalizing procurement plans.

Specialty Logic Selection Notes

Select this component when an application requires an 18-bit wide bus interface rather than standard 8-bit or 16-bit widths. The ABT technology offers faster switching speeds compared to older ALS or LS families. Consider the LQFP-64 package constraints regarding PCB real estate and thermal dissipation. Verify that the system's noise immunity requirements are met by the TTL input thresholds provided by this logic family.

Specialty Logic Part Context

This part belongs to the Texas Instruments SCOPE (Specialty Component Offering for Programmable Equipment) line, designed for complex logic applications. It complements other members like the SN74ABT18502A and SN74LVTH18502A, which offer similar functionality but may differ in voltage ranges or pin configurations. The 74ABTH series is engineered for high-performance digital systems requiring reliable data transmission over wide buses.

Specialty Logic Replacement Considerations

The SN74ABT18504PZ is a tray-packaged equivalent with identical electrical characteristics. For lower voltage operations, the SN74LVTH18504A series serves as a functional alternative. Always verify pin compatibility and package dimensions before substituting.