CLVTH16646IDGGREP

Overview

The CLVTH16646IDGGREP is a 16-bit bus transceiver and register utilizing Advanced BiCMOS (ABT) technology for 3.3-V operation with low static-power dissipation. It supports mixed-mode signal operation, allowing 5-V input and output voltages while operating at 3.3 V. The device features two independent 8-bit registers, selectable real-time or registered data transfer via SAB/SBA select inputs, and active bus-hold circuitry on data inputs. It includes Ioff and power-up 3-state support for hot-insertion applications.

Feature Summary

• Supports mixed-mode signal operation with 5-V tolerant inputs and outputs alongside 3.3-V VCC operation
• Provides registered and real-time data transfer modes controlled by SAB and SBA select inputs
• Features active bus-hold circuitry to maintain valid logic levels on floating data inputs without external resistors
• Includes Ioff and power-up 3-state circuitry to prevent damaging backflow current and driver conflicts during hot insertion

Applications

• High-density data acquisition systems requiring registered data storage
• Clocking data buffers in communication protocols
• Bus-oriented memory and control circuits
• Hot-swappable peripheral interface designs

Procurement Notes

Verify the specific ordering suffix IDGGREP corresponds to the Thin Shrink Small-Outline (DGG) package with tape and reel packaging. Confirm that the component meets the required environmental specifications for the intended application, as this part number represents a controlled baseline product with enhanced diminishing manufacturing sources support. Ensure compatibility with the specified -40°C to 85°C operating temperature range.

Selection Notes

Select this component when designing systems that require simultaneous registered and transparent data handling on a 16-bit bus. It is suitable for environments where mixed-voltage interfaces between 3.3-V and 5-V systems are necessary. Consider its hot-insertion capabilities if the design involves live connection scenarios. Verify that the 56-pin DGG package fits the available PCB footprint and thermal constraints.

Part Context

This device belongs to Texas Instruments' Widebus family of logic components. It is an enhanced plastic version of the SN74LVTH16646, designed for high-reliability applications. The CLVTH16646IDGGREP shares functional similarities with other LVTH series transceivers but offers specific military-grade qualification pedigree and controlled manufacturing processes.

Replacement Considerations

Direct replacements include the standard commercial grade SN74LVTH16646DGGR. For military or space-grade requirements, verify availability of the SNJ54LVTH16646WD ceramic variant. Ensure any substitute maintains the same ABT technology characteristics and pinout compatibility.

FAQ

How does the device handle data transfer between buses?

Data can be transferred in real-time or stored in internal registers. The SAB and SBA select inputs determine whether the output reflects the current input state or the previously clocked registered data.

What is the purpose of the active bus-hold circuitry?

Active bus-hold circuitry keeps unused or floating data inputs at a valid logic level, eliminating the need for external pullup or pulldown resistors.

Can this device be used in hot-insertion applications?

Yes, the device is fully specified for hot-insertion applications due to its Ioff and power-up 3-state features, which prevent damaging current backflow and driver conflicts.