54ACTQ245LMQB-R

Overview

The 54ACTQ245LMQB-R is a non-inverting octal bus transceiver manufactured by National Semiconductor. It features one functional element with eight bits per element and provides three-state outputs in a 20-LCCC package measuring 8.89x8.89 mm. The device operates within a supply voltage range of 4.5V to 5.5V, supporting an access time of 12ns and a data rate of 50MHz. It draws a maximum supply current of 40mA and delivers output currents of 24mA for both high and low states. The component functions reliably across an operating temperature range from -55°C to 125°C.

Feature Summary

• Provides non-inverting octal bus transceiver functionality for asynchronous two-way communication between data buses
• Features three-state outputs that allow direct driving of bus lines while effectively isolating buses when disabled
• Incorporates direction control logic to manage data transmission flow between A and B buses

Applications

• Asynchronous two-way communication between data buses
• High-speed data handling in FPGA configurations
• Control system signal routing

Procurement Notes

Verify the manufacturer designation as National Semiconductor or its successor entities. Confirm the specific suffix 'R' indicates the required reel packaging configuration if applicable. Ensure the 20-LCCC package dimensions match the 8.89x8.89 mm specification. Validate the operating temperature range of -55°C to 125°C against environmental requirements. Cross-reference the 4.5V to 5.5V supply voltage tolerance with system power rails.

Selection Notes

Select this component when a non-inverting octal transceiver with three-state outputs is required for bidirectional data transfer. The 54ACT series offers high speed and low power consumption suitable for CMOS applications. Consider the 20-LCCC package for surface mount assembly needs. Ensure the 4.5V to 5.5V supply voltage aligns with the system design. Verify the -55°C to 125°C temperature range meets operational conditions.

Part Context

This part belongs to the ACT series of bus transceivers designed for high-speed digital applications. It serves as a critical interface component for managing data flow between different bus segments. The device supports standard CMOS logic levels and provides robust performance in demanding environments. Its octal configuration allows efficient handling of wide data paths.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.