SN74FB2033KRC

Specialty Logic Overview

The SN74FB2033KRC is an 8-bit TTL/BTL registered transceiver in a 52-pin RC (QFP) package. It features a split input/output A port for TTL levels and a common open-collector B port for Backplane Transceiver Logic (BTL). The device supports buffer, D-type flip-flop, or latch modes via mode inputs. Recommended operating conditions specify VCC at 4.75V to 5.25V and BIAS VCC at 4.5V to 5.5V. Maximum clock frequency is 150MHz. AO port low-level output current is 24mA, while the B port sinks up to 100mA.

Specialty Logic Feature Summary

• Compatible with IEEE Std 1194.1-1991 standard
• Open-collector B-port outputs capable of sinking high current
• BIAS VCC pin minimizes signal distortion during live insertion
• High-impedance state maintained during power-up and power-down

Specialty Logic Applications

• Backplane interface connections
• Live insertion/withdrawal systems
• TTL to BTL level translation

Specialty Logic Procurement Notes

Verify the specific ordering suffix 'RC' corresponds to the QFP tube packaging configuration. Confirm that the component meets RoHS requirements as indicated in the manufacturer's latest documentation. Ensure the design accommodates the required BIAS VCC supply voltage distinct from the main VCC rail. Check for any updates regarding the active status of this part number before finalizing procurement plans.

Specialty Logic Selection Notes

Select this component when interfacing between TTL logic cards and backplanes requiring BTL signaling. The split A-port architecture allows independent control of input and output paths. Consider the high sink capability of the B port for driving heavy loads. Verify that the system timing requirements align with the specified setup and hold times for the chosen logic mode.

Specialty Logic Part Context

This device belongs to the SN74FB series of high-speed bus transceivers. It provides a robust solution for connecting peripheral cards to backplanes where hot-swapping capabilities are necessary. The inclusion of biasing networks helps precondition connectors and traces to prevent signal integrity issues during power transitions.

Specialty Logic Replacement Considerations

SN74FB2033ARC

Specialty Logic FAQ

How does the LOOPBACK input affect data flow?

When LOOPBACK is low, B-port data serves as the input for the B-to-A direction. When high, the output of the selected A-to-B logic element becomes the B-to-A input.

What is the function of the BIAS VCC pin?

The BIAS VCC pin establishes a voltage between 1.62V and 2.1V on the BTL outputs when VCC is not connected, minimizing signal distortion during live insertion.