SN74ALVTH162827LR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALVTH162827LR is a 20-bit buffer and line driver manufactured by Texas Instruments, utilizing Advanced BiCMOS Technology (ABT). It operates at 2.5-V or 3.3-V VCC and supports mixed-mode signal environments with 5-V tolerant inputs and outputs. The device features two independent 10-bit sections, each with separate output-enable signals. It includes active bus-hold circuitry to prevent floating data inputs and equivalent 30-Ω series resistors on output ports to minimize overshoot and undershoot without external components.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation with 5-V input and output voltage tolerance while operating at lower supply voltages
• Features Auto3-State functionality that eliminates bus current loading when the output voltage exceeds VCC plus 0.5 V
• Incorporates active bus-hold circuitry on data inputs to maintain valid logic levels and eliminate the need for external pullup or pulldown resistors
• Provides high-impedance states during power-up and power-down to prevent driver conflicts and permit live insertion

Buffers, Drivers, Receivers, Transceivers Applications

• High-density data buffers in mixed-voltage system architectures
• Line drivers requiring 5-V tolerance for interfacing with legacy systems
• Bus structures necessitating controlled impedance and reduced signal reflections
• Applications requiring live insertion capabilities without driver conflict

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package suffix corresponding to the 'LR' designation against the manufacturer's official Package Option Addendum, as standard designations include DL, GR, and VR. Confirm the component status, as listings indicate this part may be obsolete or in limited production. Ensure the selected variant matches the required operating temperature range of -40°C to 85°C for commercial applications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring wide-bus buffering with mixed-signal compatibility. The ABT technology offers low static power dissipation compared to standard CMOS. Consider the distributed VCC and GND pin configuration for minimizing high-speed switching noise. Verify that the 12 mA output drive capability meets the load requirements of the destination circuits.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SNx4ALVTH162827 family of 20-bit buffers/drivers. It is part of Texas Instruments' Widebus portfolio designed for 2.5-V and 3.3-V operations. The family shares architectural similarities with other ALVTH devices but is distinct in its 20-bit width and specific 5-V tolerance characteristics suitable for parallel data buses.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALVTH162827DL

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle unused data inputs?

The SN74ALVTH162827 incorporates active bus-hold circuitry on all data inputs. This feature holds unused or floating inputs at a valid logic level, eliminating the need for external pullup or pulldown resistors.

What is the function of the Auto3-State feature?

Auto3-State automatically places the outputs in a high-impedance state when the output voltage exceeds VCC + 0.5 V. This prevents excessive current flow and eliminates bus current loading during mixed-voltage transitions.

Does the device require external series resistors?

No, the output ports include equivalent 30-Ω series resistors internally. These resistors are designed to reduce overshoot and undershoot, removing the requirement for external resistors in most applications.