SN74GTL1655DGGR

Overview

The SN74GTL1655DGGR is a 16-bit universal bus transceiver manufactured by Texas Instruments. It facilitates data transfer between LVTTL and GTL logic families, supporting bidirectional communication across 16 channels. The device operates within an industrial temperature range of -40°C to 85°C and utilizes a 64-pin TSSOP package. Key electrical characteristics include adjustable edge rates for signal integrity optimization and over-voltage tolerant inputs compatible with 5.5V signals while powered at lower voltages.

Feature Summary

• Supports universal bus transceiver functions between LVTTL and GTL logic levels
• Features adjustable edge rate control for optimized signal integrity
• Includes partial power-down capability via Ioff pin to minimize standby current
• Provides over-voltage tolerant inputs for safe interfacing with higher voltage systems

Applications

• High-speed data buses requiring LVTTL to GTL translation
• Memory subsystems utilizing GTL termination standards
• Industrial control systems operating in extended temperature environments

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and temperature grade. Ensure the ordering part number matches the exact functional requirements, as suffixes may indicate variations in tape-and-reel specifications or packaging quantities. Cross-reference the datasheet revision date to ensure compatibility with current design constraints.

Selection Notes

Select this component when designing interfaces between low-voltage TTL logic and GTL-based memory or peripherals. The adjustable edge rate feature makes it suitable for high-speed applications where signal ringing must be controlled. Verify that the system power supply supports the required GTL termination voltage levels and that the 64-pin TSSOP footprint fits the PCB layout constraints.

Part Context

This device belongs to the GTLP family of bus transceivers from Texas Instruments. It is designed specifically for bridging the gap between standard LVTTL logic and GTL-compatible components. The 16-bit width allows for parallel data transmission, reducing pin count compared to narrower transceivers in complex digital systems.

Replacement Considerations

Consult the Texas Instruments replacement matrix for verified cross-reference part numbers. Ensure any substitute maintains the same 16-bit width, GTL/LVTTL interface capabilities, and 64-pin TSSOP package dimensions to guarantee mechanical and electrical compatibility.