SN74GTLP22033DGVR

Specialty Logic Overview

The SN74GTLP22033DGVR is an 8-bit LVTTL-to-GTLP adjustable-edge-rate registered transceiver in a TVSOP-48 package. It provides inverted signal-level translation between LVTTL logic levels and GTLP backplane signals. The device supports transparent, latched, and flip-flop data modes with split LVTTL ports for diagnostics. It features high-drive outputs (100 mA), TI-OPC circuitry to limit ringing, OEC circuitry for signal integrity, and live-insertion support via Ioff, power-up 3-state, and BIAS VCC.

Specialty Logic Feature Summary

• Bidirectional interface translating between LVTTL card logic and GTLP backplane signal levels
• Split LVTTL port providing separate input and output pins for control and diagnostics feedback
• Adjustable edge-rate control optimizing rise and fall times for distributed load signal integrity
• Live-insertion capability supported by Ioff, power-up 3-state, and BIAS VCC precharge circuits

Specialty Logic Applications

• High-speed interfaces between LVTTL logic cards and GTLP backplanes
• Distributed load backplane systems requiring optimized data-transfer rates
• Systems requiring live insertion or hot-swapping capabilities

Specialty Logic Procurement Notes

Verify the specific ordering suffix DGVR corresponds to the TVSOP-48 tape and reel packaging configuration. Confirm that the GTLP termination voltage (VTT) and reference voltage (VREF) settings align with the system's noise margin requirements. Ensure proper connection sequencing for BIAS VCC to activate precharge features during live insertion.

Specialty Logic Selection Notes

Select this component when designing interfaces between 3.3-V LVTTL devices and GTLP backplanes. The adjustable edge-rate control allows optimization for varying backplane loads. The split port architecture is suitable for applications requiring diagnostic monitoring of input data at the output stage.

Specialty Logic Part Context

This device belongs to the Widebus family of high-drive voltage translation components from Texas Instruments. It utilizes GTLP, a derivative of the Gunning Transceiver Logic standard, designed for high-speed operation on backplanes. The SN74GTLP22033 offers functionality similar to the SN74FB2033 but with enhanced GTLP-specific drive and signaling characteristics.

Specialty Logic Replacement Considerations

SN74GTLP22033DGGR

Specialty Logic FAQ

How does the device handle live insertion?

The SN74GTLP22033 supports live insertion through Ioff circuitry to prevent backflow, power-up 3-state to avoid driver conflict, and BIAS VCC to precondition B-port connections without disturbing active backplane data.

What is the function of the ERC input?

The Edge-Rate Control (ERC) input adjusts the B-port output rise and fall times. Setting ERC high selects slow edge rates, while setting it low selects fast edge rates, allowing designers to optimize signal integrity for the specific backplane load.