SN74GTLP22034DGGR

Specialty Logic Overview

The SN74GTLP22034DGGR is an 8-bit LVTTL-to-GTLP registered transceiver in a TVSOP-48 package. It operates at VCC = 3.3V with GTLP termination voltage (VTT) of 1.5V and reference voltage (VREF) of 1V. The device supports clock frequencies up to 175 MHz, with propagation delays ranging from 1ns to 8.7ns depending on mode and edge rate. It features high-drive B-port outputs (100mA) and AO outputs (-12mA/12mA). ERC input controls rise/fall times for signal integrity optimization.

Specialty Logic Feature Summary

• Bidirectional interface between GTLP backplane levels and LVTTL logic levels
• Split LVTTL port provides feedback path for control and diagnostics monitoring
• Adjustable-edge-rate control optimizes data-transfer rate and signal integrity
• Supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry

Specialty Logic Applications

• High-speed backplane interfaces operating at GTLP signal levels
• Systems requiring transparent, latched, or flip-flop modes of data transfer
• Applications needing control and diagnostics monitoring via split LVTTL port
• Live-insertion capable systems utilizing precharge and isolation features

Specialty Logic Procurement Notes

Verify the DGGR suffix corresponds to the DGG TVSOP-48 tape and reel packaging configuration. Confirm that the specific revision level matches the SCES355C datasheet documentation. Ensure compatibility with the required VTT and VREF settings for the target GTLP application environment before finalizing procurement orders.

Specialty Logic Selection Notes

Select this component when interfacing LVTTL cards with GTLP backplanes requiring registered translation. Consider the adjustable edge-rate control for optimizing signal integrity in distributed load environments. Evaluate the need for split LVTTL ports for diagnostic feedback. Verify that the 175 MHz maximum clock frequency meets system timing requirements.

Specialty Logic Part Context

Part of the Texas Instruments Widebus family, designed for high-speed digital interfaces. Utilizes TI-OPC circuitry to limit ringing on unevenly loaded backplanes and OEC circuitry to improve signal integrity. The device integrates D-type latches and flip-flops for flexible data-path operation across multiple logic modes.

Specialty Logic Replacement Considerations

SN74GTLP22034DGVR: Same functional specifications but packaged in DGV TVSOP-48 tape and reel format instead of DGG TVSOP-48.

Specialty Logic FAQ

How does the ERC input affect performance?

The ERC input adjusts the B-port output rise and fall times. Setting ERC high selects slow edge rates, while low selects fast edge rates, allowing optimization for data-transfer rate and signal integrity.

What is the purpose of the split LVTTL port?

The split LVTTL port separates AI (input) and AO (output) pins, providing a dedicated feedback path for control and diagnostics monitoring during data transmission.

Does the device support live insertion?

Yes, it supports true live insertion through Ioff circuitry, power-up 3-state functionality, and BIAS VCC precharge circuitry to prevent backplane disturbance during card insertion or removal.