74GTLP1394DGVRE4

Overview

The SN74GTLP1394DGVRE4 is a 2-bit LVTTL-to-GTLP adjustable-edge-rate bus transceiver in a TVSOP-16 package. It operates at VCC and BIAS VCC of 3.15 V to 3.45 V, with GTLP termination voltage (VTT) of 1.35 V to 1.65 V and reference voltage (VREF) of 0.87 V to 1.1 V. Propagation delays range from 1.4 ns to 9 ns depending on edge rate and direction. The device supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry.

Feature Summary

• Provides bidirectional signal-level translation between LVTTL logic levels and GTLP backplane signal levels.
• Features a split LVTTL port that provides a dedicated feedback path for control and diagnostics monitoring.
• Includes adjustable edge-rate control (ERC) input to optimize data-transfer rates and signal integrity in distributed loads.
• Supports true live-insertion applications through integrated Ioff, power-up 3-state, and BIAS VCC precharge circuitry.

Applications

• High-speed interface between cards operating at LVTTL logic levels and backplanes operating at GTLP signal levels
• Transmission of IEEE 1394 backplane serial bus signals across parallel backplanes
• System enhancement providing fault tolerance and auxiliary bus access in VME or FutureBus+ environments

Procurement Notes

Verify the specific ordering suffix 'E4' against current manufacturer documentation to confirm compliance with RoHS3 standards and lead-free specifications. Ensure the DGV package variant matches the required PCB footprint dimensions. Confirm availability status as distribution channels may list obsolete part numbers differently than official production data.

Selection Notes

Select this component when interfacing LVTTL controllers with GTLP-compliant backplanes requiring high-drive capabilities. The split A-port design is essential for applications needing separate diagnostic monitoring paths. Verify that the system utilizes the recommended ERC pin configuration to manage rise and fall times appropriately for the specific backplane load impedance.

Part Context

This device belongs to the SN74GTLP series of bus transceivers designed by Texas Instruments. It serves as a specialized interface solution for high-performance computing architectures, specifically supporting the physical layer requirements of the IEEE 1394 standard. The DGV package denotes a plastic small-outline thin very slim profile variant suitable for surface-mount assembly.

Replacement Considerations

SN74GTLP1394DGVR is the non-E4 equivalent in the same TVSOP-16 package. SN74GTLP1394PWR offers identical functionality in a TSSOP-16 package. SN74GTLP1394RGY provides the same features in a QFN package format.