SN74GTL16923DGGR

Overview

The SN74GTL16923DGGR is an 18-bit registered bus transceiver from the Widebus family, partitioned into two independent 9-bit sections. It provides LVTTL-to-GTL/GTL+ and GTL/GTL+-to-LVTTL signal-level translation for mixed-mode systems. The device operates with a supply voltage range of 3.15 V to 3.45 V and supports clock frequencies up to 200 MHz. It features D-type flip-flops with qualified storage enable, Ioff support for partial-power-down mode, and active bus-hold circuitry on data inputs. The component is housed in a 64-pin TSSOP (DGG) package.

Feature Summary

• Translates between LVTTL logic levels and GTL or GTL+ signal levels
• Includes D-type flip-flops with qualified storage enable for temporary data flow control
• Supports partial-power-down operation via Ioff circuitry to prevent backflow current
• Integrates active bus-hold circuitry on data inputs to eliminate external pullup/pulldown resistors

Applications

• Interface between cards operating at LVTTL logic levels and backplanes operating at GTL/GTL+ signal levels
• Mixed-mode signal operation in environments utilizing both 5-V and 3.3-V devices
• Registered bus transceiver applications requiring bidirectional data flow control

Procurement Notes

Verify that the specific orderable part number matches the required package type and temperature rating. Confirm RoHS compliance status and lead finish specifications against the latest manufacturer documentation. Ensure design compatibility with the recommended operating conditions, specifically the 3.15 V to 3.45 V supply voltage range and appropriate termination voltages for the selected logic standard.

Selection Notes

Select this component when interfacing LVTTL devices with GTL or GTL+ backplanes. The dual 9-bit architecture allows independent output-enable controls for each section. Consider the device's ability to handle mixed 3.3-V and 5-V input environments. Verify that the system timing requirements align with the specified setup and hold times for the chosen clock frequency and logic standard.

Part Context

This device belongs to the Texas Instruments Widebus family, designed for high-speed data transmission. It utilizes OEC circuitry to improve signal integrity and reduce electromagnetic interference. The SN74GTL16923 is part of a broader series of registered bus transceivers intended for complex digital systems requiring reliable level shifting and data registration across different voltage domains.

Replacement Considerations

Consult official substitution guides for compatible parts within the same logic family. Verify pinout compatibility and electrical characteristics before replacing existing components in established designs.