SN74GTLPH1612DGGR

Overview

The SN74GTLPH1612DGGR is an 18-bit Universal Bus Transceiver (UBT) from Texas Instruments, designed for high-speed LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. It operates within a supply voltage range of 3.15 V to 3.45 V and supports free-air temperatures from -40°C to +85°C. The device features high-drive GTLP outputs capable of 100 mA and LVTTL outputs with ±24 mA drive strength. It includes adjustable edge-rate control (ERC), TI-OPC circuitry for ringing limitation, and OEC circuitry for improved signal integrity. The component is housed in a 64-pin TSSOP package.

Feature Summary

• Combines D-type latches and flip-flops for transparent, latched, clocked, or clock-enabled data transfer modes
• Provides bidirectional interface between GTLP backplane levels and 5-V tolerant LVTTL logic levels
• Features adjustable edge-rate control to optimize rise and fall times for distributed loads
• Supports live insertion through Ioff, power-up 3-state, and BIASVCC precharge circuitry

Applications

• High-speed backplane interfaces requiring LVTTL to GTLP translation
• Distributed load systems utilizing unevenly loaded cards or empty slots
• Live-insertion applications requiring hot-swap capability without bus disturbance
• Universal bus driver replacements for standard 8-bit, 9-bit, 10-bit, 16-bit, and 18-bit functions

Procurement Notes

Verify the specific ordering suffix DGGR corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm that the GTLP termination voltage (VTT) and reference voltage (VREF) settings align with the target backplane impedance specifications. Ensure that the ERC pin voltage levels are correctly biased to achieve the desired edge rate performance for the specific application environment.

Selection Notes

Select this component when designing systems that require flexible data path configurations combining latches and flip-flops. It is suitable for applications needing high-drive capabilities on heavily loaded backplanes with low equivalent load impedance. Consider this device if the design demands active bus-hold functionality on A-port inputs and requires mitigation of overshoot caused by improper terminations or uneven loading conditions.

Part Context

This device belongs to the Texas Instruments Widebus family of universal bus transceivers. It serves as a comprehensive replacement for various standard logic functions including buffers, drivers, latches, registered transceivers, and flip-flops across multiple bit widths. The SN74GTLPH1612 integrates advanced signal integrity features specifically engineered for high-speed digital backplane communications.

Replacement Considerations

SN74GTLPH1612DGGRG4