SN74LVTH18512DGRR

Updated: 2026-09-20

Overview

The SN74LVTH18512DGRR is a high-performance 18-bit universal bus transceiver designed for low-voltage applications. It is part of Texas Instruments' LVTH series, which combines advanced CMOS technology with robust performance characteristics. This device is widely used in industrial, automotive, and embedded systems for data communication and signal buffering. The transceiver supports bidirectional data flow and features 3-state outputs, making it suitable for bus-oriented applications. Its LVTTL compatibility ensures seamless integration with a variety of logic families, while the bus-hold feature eliminates the need for external pull-up or pull-down resistors.

Structure and Working Principle

The SN74LVTH18512DGRR consists of 18 identical transceiver channels, each capable of bidirectional data transfer. The device operates by controlling the direction of data flow through a dedicated direction control pin (DIR). When DIR is set high, data flows from the A port to the B port, and vice versa when DIR is low. The 3-state outputs allow multiple devices to share a common bus without interference. The bus-hold circuitry maintains the last valid logic state when inputs are left floating, ensuring signal integrity. The device also includes partial-power-down mode, which reduces power consumption when not in active use.

Key Features

The SN74LVTH18512DGRR offers several key features, including LVTTL-compatible inputs and outputs, which ensure compatibility with a wide range of logic levels. The bus-hold feature eliminates the need for external resistors, simplifying board design and reducing component count. Other notable features include 3-state outputs for bus sharing, partial-power-down mode for energy efficiency, and robust ESD protection (typically 2000V). The device operates over a wide voltage range (2.7V to 3.6V) and is available in a compact SSOP package, making it suitable for space-constrained applications.

Application Areas

The SN74LVTH18512DGRR is commonly used in data communication systems, such as networking equipment, routers, and switches. Its bidirectional capability and bus-hold feature make it ideal for interfacing between microprocessors and peripheral devices. Other applications include industrial automation, automotive electronics, and embedded systems where reliable signal buffering and voltage level translation are required. The device's robust design and wide operating temperature range make it suitable for harsh environments.

Maintenance and Precautions

To ensure optimal performance, the SN74LVTH18512DGRR should be operated within its specified voltage and temperature ranges. Exceeding these limits may result in device failure or reduced reliability. Proper ESD precautions should be followed during handling and installation to prevent damage. When designing with this device, ensure adequate power supply decoupling to minimize noise and voltage fluctuations. Avoid leaving inputs floating, as this can lead to unpredictable behavior. For long-term storage, keep the device in a dry, anti-static environment.

B2B Procurement Guide

When procuring the SN74LVTH18512DGRR, verify the manufacturer's part number and packaging type (e.g., SSOP-56). Check for authenticity by purchasing from authorized distributors or directly from Texas Instruments to avoid counterfeit products. Consider ordering in bulk to benefit from volume discounts. Lead times and pricing may vary depending on market demand, so plan procurement accordingly. Ensure the device meets your application's voltage and temperature requirements before finalizing the order.