SN74FB2040RC

Specialty Logic Overview

The SN74FB2040RC is an 8-bit TTL/BTL transceiver manufactured by Texas Instruments in a 52-pin RC (TQFP) package. It translates signals between TTL and backplane transceiver logic environments. The B port operates at BTL levels with open-collector outputs capable of sinking 100 mA, while the A port operates at TTL levels. It features high-impedance states during power-up/down and includes a BIAS VCC pin to minimize signal distortion during live insertion.

Specialty Logic Feature Summary

• Translates signals between TTL and Backplane Transceiver Logic (BTL) environments
• Open-collector B-port outputs sink up to 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
• Live insertion systems requiring signal isolation
• TTL to BTL signal translation circuits

Specialty Logic Procurement Notes

Verify the exact part number SN74FB2040RC against official Texas Instruments documentation to confirm the RC package suffix and operating temperature range. Ensure compatibility with IEEE Std 1194.1-1991 requirements if applicable. Confirm that unused inputs are terminated correctly according to recommended operating conditions to ensure proper device operation.

Specialty Logic Selection Notes

Select this component for designs requiring robust signal translation between TTL and BTL domains. Consider its 100 mA sink capability on the B port for heavy loads. Verify that the 0°C to 70°C operating temperature range meets system environmental requirements. Check pinout compatibility if replacing existing designs.

Specialty Logic Part Context

This device belongs to the SN74FB2040 family of 8-bit transceivers. It is specifically designed for backplane applications where BTL signaling is used. The RC package denotes a thin quad flatpack variant. It supports live insertion scenarios through its biasing network and high-impedance power-off states.

Specialty Logic Replacement Considerations

SN74FB2040