SN74GTLP817DGVR

Translators, Level Shifters Overview

The SN74GTLP817DGVR is a fanout driver providing LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. It operates at VCC = 3.3V with VTT = 1.5V and VREF = 1V for GTLP levels. The device features a 1-to-2 LVTTL-to-GTLP driver (AO to BO) and a 1-to-6 GTLP-to-LVTTL driver (BI to AO). Propagation delays range from 1.5ns to 6.3ns depending on edge rate control. Outputs support medium drive (50mA) for GTLP and reduced drive (±12mA) for LVTTL.

Translators, Level Shifters Feature Summary

• Bidirectional interface between GTLP signal levels and LVTTL logic levels
• Variable edge-rate control input selects GTLP rise and fall times
• Ioff and power-up 3-state support hot insertion applications
• Distributed VCC and GND pins minimize high-speed switching noise

Translators, Level Shifters Applications

• High-speed backplane operation
• Cards operating at LVTTL logic levels interfacing with backplanes
• Distributed loads requiring incident-wave switching

Translators, Level Shifters Procurement Notes

Verify the package type matches the required footprint, as the SN74GTLP817 family includes SOIC, TSSOP, and TVSOP options. Confirm that the specific DGVR suffix corresponds to the TVSOP package variant needed for your design. Ensure compatibility with the 3.3V supply voltage and GTLP termination requirements before finalizing procurement.

Translators, Level Shifters Selection Notes

Select this component when bidirectional translation between LVTTL and GTLP is required in a single package. Consider the variable edge-rate control feature if optimizing data-transfer rates and signal integrity for distributed backplane loads is critical. Verify that the medium-drive capability meets the impedance requirements of the target bus architecture.

Translators, Level Shifters Part Context

This part belongs to the SN74GTLP series of fanout drivers designed by Texas Instruments. It utilizes OEC circuitry to minimize bus settling time and improve signal integrity. The device supports both GTL and GTLP signal levels, offering flexibility in system design while maintaining compatibility with standard TTL and 5-V CMOS inputs on the LVTTL side.

Translators, Level Shifters Replacement Considerations

SN74GTLP817DW

Translators, Level Shifters FAQ

What is the function of the ERC input?

The Edge-Rate Control (ERC) input adjusts the B-port output rise and fall times. Connecting it to VCC selects slow edge rates, while connecting it to GND selects fast edge rates, allowing optimization for data-transfer rate and signal integrity.

How does the device support hot insertion?

The device includes Ioff circuitry to disable outputs and prevent backflow current when powered down, and power-up 3-state circuitry to place outputs in a high-impedance state during power transitions, preventing driver conflicts.