SN74FB2040RCG3

Specialty Logic Overview

The SN74FB2040RCG3 is an 8-bit TTL/BTL transceiver in a QFP package. It translates signals between TTL and backplane transceiver logic (BTL) environments. The B port operates at BTL levels with open-collector outputs sinking up to 100 mA. The A port operates at TTL levels. It features high-impedance states during power-up/down, a BIAS VCC pin for live insertion, and separate output enables.

Specialty Logic Feature Summary

• Translates signals between TTL and backplane transceiver logic (BTL) environments
• Open-collector B-port outputs capable of sinking 100 mA
• Maintains high-impedance state during power-up and power-down
• BIAS VCC pin minimizes signal distortion during live insertion or withdrawal

Specialty Logic Applications

• Backplane transceiver logic applications
• TTL to BTL signal translation
• Live insertion systems

Specialty Logic Procurement Notes

Verify the RC package suffix corresponds to the tube packing format specified in the ordering information. Confirm the operating temperature range matches the 0°C to 70°C specification for this part number. Ensure compatibility with the required supply voltage and signal levels before procurement.

Specialty Logic Selection Notes

Select this component when interfacing TTL logic with BTL backplane environments requiring high current sinking capabilities. Consider the separate output enables and live insertion support if system hot-swapping is required. Verify that the QFP package fits the PCB layout constraints.

Specialty Logic Part Context

This device belongs to the SN74FB2040 family of 8-bit transceivers. It is designed specifically for translating between TTL and BTL logic standards. The RC package variant indicates a specific physical form factor and packing method within the Texas Instruments product line.

Specialty Logic Replacement Considerations

Check for other SN74FB2040 variants with different package suffixes if the QFP form factor is unsuitable. Verify functional equivalence for any cross-family replacements.