SN74GTLPH16612DL

Overview

The SN74GTLPH16612DL is an 18-bit Universal Bus Transceiver (UBT) from Texas Instruments, designed for bidirectional voltage level translation between LVTTL and GTLP signal levels. It integrates D-type latches and flip-flops to support transparent, latched, clocked, or clock-enabled data transfer modes. The device operates with a 3.3 V supply for LVTTL buffers and a 5 V supply for internal and GTLP circuitry. It features OEC circuitry to minimize bus-settling time and electromagnetic interference, making it suitable for high-speed backplane applications.

Feature Summary

• Combines D-type latches and flip-flops to enable flexible data flow in transparent, latched, clocked, or clock-enabled modes.
• Provides bidirectional interface between 5-V tolerant LVTTL logic levels and GTLP signal levels.
• Incorporates OEC circuitry to optimize rise and fall times for improved signal integrity and reduced electromagnetic interference.
• Supports partial-power-down mode operation through Ioff circuitry that disables outputs to prevent damaging current backflow.

Applications

• High-speed interface between cards operating at LVTTL logic levels and backplanes operating at GTLP signal levels
• Universal bus transceiver replacement for standard logic functions such as buffers, drivers, and registered transceivers
• Systems requiring flexible data transfer modes including transparent, latched, clocked, or clock-enabled operations

Procurement Notes

Verify the package type matches the design requirements, as the DL suffix indicates an SSOP package. Confirm that the system supports the required dual power supplies of 3.3 V and 5 V. Ensure that the termination voltage (VTT) and reference voltage (VREF) settings align with the specific GTL or GTLP standards being used in the application. Check for any updates to the datasheet revision history before finalizing the component selection.

Selection Notes

Select this component when an 18-bit wide bus interface is needed between LVTTL and GTLP domains. It is appropriate for designs requiring multiple data transfer modes controlled by latch enables, clock enables, and clocks. Consider the medium-drive output capability and the distributed load optimization if the application involves backplane connections. Ensure the PCB layout accommodates the SSOP-56 package dimensions and thermal requirements.

Part Context

This device belongs to Texas Instruments' Widebus family of logic products. It is part of the GTLPH series, which focuses on low-power GTLP solutions. The SN74GTLPH16612 serves as a versatile replacement for various standard logic functions, including 18-bit transceivers, buffers, and latches, consolidating multiple roles into a single integrated circuit.

Replacement Considerations

Public confirmed substitute part numbers: SN74GTLPH16612DGGR, SN74GTLPH16612DLR.