74GTLP1394DGVRG4

Overview

The SN74GTLP1394DGVRG4 is a 2-bit LVTTL-to-GTLP adjustable-edge-rate bus transceiver in a 16-pin TVSOP package. It provides bidirectional signal-level translation between LVTTL logic levels and GTLP backplane signals. The device features split LVTTL ports for feedback, selectable polarity control, and adjustable edge-rate control (ERC) to optimize data-transfer rates and signal integrity. It supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry. Operating conditions include a supply voltage of 3.15 V to 3.45 V and an operating temperature range of -40°C to +85°C.

Feature Summary

• Bidirectional interface translating between LVTTL logic levels and GTLP signal levels
• Split LVTTL port architecture providing separate input and output pins for diagnostics monitoring
• Adjustable edge-rate control (ERC) input to select rise and fall times for distributed loads
• Supports live insertion through Ioff, power-up 3-state, and BIAS VCC precharge capabilities

Applications

• High-speed interface between cards operating at LVTTL logic levels and backplanes operating at GTLP signal levels
• Integration with Texas Instruments 1394 backplane physical-layer controllers
• Transmission of IEEE 1394 backplane serial bus signals across parallel backplanes
• Providing single-bit clocks or ATM read/write clocks in multislot parallel backplane applications

Procurement Notes

Verify the specific ordering suffix 'G4' corresponds to the lead-free and RoHS-compliant variant as defined in the manufacturer's documentation. Confirm that the TVSOP-16 package dimensions match the target PCB footprint requirements. Ensure the design accounts for the recommended connection sequence involving GND, BIAS VCC, and VCC to properly utilize the B-port I/O precharge feature for live-insertion support.

Selection Notes

Select this component when a bidirectional translator is required between LVTTL inputs and GTLP backplane outputs. The split port design is essential for applications needing a feedback path for control and diagnostics. Consider the adjustable edge-rate control if optimizing signal integrity for heavily loaded backplanes with low equivalent load impedance. Verify compatibility with the specific GTL or GTLP termination voltages required by the system design.

Part Context

This device belongs to the SN74GTLP1394 family of high-drive bus transceivers. It is specifically engineered to facilitate communication in systems utilizing the GTLP standard, which is a derivative of the Gunning Transceiver Logic (GTL) JEDEC standard. The family includes variants with different packaging options such as SOIC, TSSOP, and QFN, all sharing the core functionality of level shifting and edge-rate adjustment for high-speed digital interfaces.

Replacement Considerations

The SN74GTLP1394DGVRE4 is a confirmed substitute part number within the same product family.