SN74GTLPH16945VR

Translators, Level Shifters Overview

The SN74GTLPH16945VR is a 16-bit bidirectional bus transceiver designed for LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. It operates at a supply voltage of 3.3 V (range 3.15 V to 3.45 V) with a BIAS VCC of 3.3 V. The device features medium-drive GTLP outputs capable of 50 mA low-state current and standard LVTTL outputs rated at ±24 mA. Propagation delay ranges from 2.1 ns to 6.3 ns depending on direction and load conditions. It supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry.

Translators, Level Shifters Feature Summary

• Provides high-speed asynchronous communication between cards operating at LVTTL logic levels and backplanes operating at GTLP signal levels.
• Includes TI-OPC circuitry that actively limits overshoot caused by improperly terminated backplanes or unevenly distributed cards during low-to-high transitions.
• Features OEC circuitry to improve signal integrity and reduce electromagnetic interference in distributed loads.
• Supports live insertion applications through integrated Ioff, power-up 3-state, and BIAS VCC precharge capabilities.

Translators, Level Shifters Applications

• High-speed interface between LVTTL logic level cards and GTLP signal level backplanes
• Asynchronous data bus communication requiring signal-level translation
• Live insertion applications utilizing precharge and isolation features

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix 'VR' corresponds to the TVSOP-48 package when sourcing components. Confirm RoHS compliance status and lead finish details against the latest Texas Instruments Package Option Addendum. Ensure design specifications align with the recommended operating conditions for VTT and VREF voltages to maintain proper noise margins.

Translators, Level Shifters Selection Notes

Select this component for designs requiring medium-drive GTLP outputs with 50 mA capability. It is suitable for systems needing active bus-hold on A-port inputs and 5-V tolerant LVTTL interfaces. Consider the propagation delay characteristics and the necessity for TI-OPC and OEC circuitry to manage signal integrity in heavily loaded backplane environments.

Translators, Level Shifters Part Context

This device belongs to the Texas Instruments Widebus family of logic ICs. It functions as a member of the GTLP series, specifically engineered for translating between LVTTL and GTLP standards. The SN74GTLPH16945 is partitioned into two independent 8-bit transceivers within a single 48-pin package.

Translators, Level Shifters Replacement Considerations

SN74GTLPH16945GR (TSSOP-48 package)

Translators, Level Shifters FAQ

How does the device support live insertion?

The device supports live insertion through Ioff circuitry which disables outputs to prevent backflow, power-up 3-state circuitry to prevent driver conflict, and BIAS VCC circuitry to precondition connections.

What is the function of the TI-OPC circuitry?

TI-OPC circuitry actively limits overshoot caused by improperly terminated backplanes, unevenly distributed cards, or empty slots during low-to-high signal transitions to improve signal integrity.