74GTLPH1627DGGRE4

Overview

The SN74GTLPH1627 is an 18-bit bus transceiver providing LVTTL-to-GTLP and GTLP-to-LVTTL signal-level translation. It supports transparent and latched data transfer modes, with a clock-mode select (CMS) input for source-synchronous or clock-synchronous applications. The device features high-drive GTLP outputs of 100 mA and LVTTL outputs of ±24 mA. It includes Ioff, power-up 3-state, and BIAS VCC support for live insertion. The operating temperature range is -40°C to +85°C.

Feature Summary

• Bidirectional interface between GTLP signal levels and LVTTL logic levels
• GTLP buffered SYSCLK signal (SSCLK) for source-synchronous applications
• LVTTL interfaces are 5-V tolerant
• High-drive GTLP outputs (100 mA)
• Ioff, Power-Up 3-State, and BIAS VCC support Live Insertion

Applications

• Source-synchronous applications requiring minimized skew between clock output and data output
• Clock-synchronous applications using the CMS input
• High-speed interface between cards operating at LVTTL logic levels and backplanes operating at GTLP signal levels
• Live-insertion applications utilizing Ioff, power-up 3-state, and BIAS VCC circuitry

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape-and-reel specifications. Confirm that the required termination voltage (VTT) and reference voltage (VREF) align with the GTLP or GTL standards supported by this component. Ensure design constraints regarding the 5-V tolerance on A-port inputs and control signals are met within the absolute maximum ratings.

Selection Notes

Select this component when interfacing LVTTL logic with GTLP backplane architectures requiring high drive strength. Consider the flexible setup time adjustment (FSTA) feature if minimizing skew in source-synchronous designs is critical. Evaluate the need for adjustable edge-rate control (ERC) to optimize data-transfer rates and signal integrity based on the specific backplane load impedance.

Part Context

This device belongs to the Widebus family from Texas Instruments. It incorporates TI-OPC circuitry to limit ringing on unevenly loaded backplanes and OEC circuitry to improve signal integrity while reducing electromagnetic interference. The part replaces functions of various 8-bit, 9-bit, 10-bit, and 16-bit transceivers and buffers, consolidating them into a single 18-bit solution.

Replacement Considerations

SN74GTLPH1627DGGR