SN74ALVCH162835GR

Overview

The SN74ALVCH162835GR is an 18-bit universal bus driver with 3-state outputs from the Texas Instruments Widebus family. It operates on a 1.65-V to 3.6-V VCC supply and utilizes EPIC submicron CMOS technology. The device features active bus-hold circuitry on data inputs, eliminating external pullup/pulldown resistors. Data flow from A to Y is controlled by the OE input, while LE and CLK inputs manage transparent or latched modes. The output port includes equivalent 26-Ω series resistors to reduce overshoot and undershoot.

Feature Summary

• Active bus-hold circuitry maintains valid logic levels on unused or floating data inputs without requiring external components.
• Integrated equivalent 26-Ω series resistors in the output port minimize signal overshoot and undershoot.
• ESD protection capabilities exceed 2000 V per MIL-STD-883 Method 3015 standards.
• Latch-up performance exceeds 250 mA according to JESD 17 specifications.

Applications

• High-density data buffering applications
• Clock distribution networks
• Bus-oriented architectures

Procurement Notes

Verify the specific package variant (TSSOP DGG) against current TI ordering databases, as legacy suffixes may indicate obsolete status. Confirm RoHS compliance and Moisture Sensitivity Level ratings prior to procurement. Ensure design reviews account for the recommended operating temperature range of -40°C to 85°C.

Selection Notes

Select this component when designing systems requiring 18-bit parallel data transfer with flexible latching control. The wide voltage range supports mixed-voltage environments. Consider the integrated series resistance for direct PCB trace connections without additional damping components.

Part Context

This device belongs to the Texas Instruments 74ALVCH logic family, characterized by low voltage operation and high-speed performance. It is part of the Widebus family, designed specifically for efficient handling of large data buses in compact surface-mount packages.

Replacement Considerations

Check for SN74ALVCH162835GRG4 as a potential lead-free alternative within the same package configuration. Verify functional equivalence regarding pinout and electrical characteristics before substitution.

FAQ

How does the device handle floating data inputs?

The SN74ALVCH162835 incorporates active bus-hold circuitry that automatically holds unused or floating data inputs at a valid logic level, removing the need for external pullup or pulldown resistors.

What controls the data flow direction?

Data flow from the A port to the Y port is controlled by the output-enable (OE) input. When OE is high, the outputs enter a high-impedance state.