Texas Instruments 74ALVTH162245LRG4

Overview

74ALVTH162245LRG4 from Texas Instruments is a 2.5-V/3.3-V 16-bit noninverting bus transceiver with 3-state outputs, dual-octal architecture, and mixed-mode 5-V-tolerant I/O. It supports bidirectional data flow between A and B buses under DIR control, features bus-hold circuitry on all data inputs, and delivers B-port drive of –32/64 mA at 3.3 V for high-noise-margin interconnect in industrial backplanes and FPGA I/O bridging.

For engineers reviewing the 74ALVTH162245LRG4 datasheet, 74ALVTH162245LRG4 pinout, 74ALVTH162245LRG4 application, or 74ALVTH162245LRG4 equivalent, this device is selected for hot-pluggable 3.3-V ↔ 5-V level translation, low-overshoot bus driving with integrated 30-Ω A-port series termination, and power-up 3-state isolation in modular computing systems.

Technical Context

This transceiver implements two independent 8-bit channels, each with separate DIR and OE controls, enabling flexible unidirectional or bidirectional data routing. Its ABT BiCMOS process delivers low static power (ICC ≤ 5 mA at 3.6 V) while supporting simultaneous 2.3–3.6-V VCC operation and 0–5.5-V input/output voltage tolerance.

The device integrates Ioff protection and power-up 3-state logic to prevent backdrive current during hot insertion, and embeds active bus-hold circuitry (IBHL = 75 µA, IBHH = –75 µA at 3 V) eliminating external pull resistors. A-port outputs include built-in 30-Ω series resistance to suppress transmission-line reflections without layout overhead.

Key Specifications

Pinout & Package

74ALVTH162245LRG4 is packaged in a 48-pin TSSOP (DGG) with 0.5-mm pitch, 12.6 mm × 6.1 mm body, and 1.2 mm max height - optimized for automated assembly and thermal performance (θJA = 70°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Compared with SN74LVC162245DGGR and SN74AVC162245GR, the 74ALVTH162245LRG4 uniquely combines 5-V-tolerant I/O, integrated A-port termination, bus-hold, and full hot-insertion capability - making it the only option qualified for mission-critical modular computing where reliability and layout efficiency are co-prioritized.

Availability

74ALVTH162245LRG4 is available at Aetrix Electronics and suitable for industrial backplane interface, FPGA I/O expansion bridge, and modular server blade interconnect requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74ALVTH162245LRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability interface ICs for industrial and communications infrastructure.

The ALVTH family was designed specifically for robust, mixed-voltage bus interfacing in hot-pluggable systems - emphasizing Ioff protection, power-up 3-state, bus-hold, and integrated termination to reduce design complexity in demanding backplane and modular applications.

FAQ

What voltage levels does the 74ALVTH162245LRG4 support on its I/O pins?

The 74ALVTH162245LRG4 supports 0–5.5 V on all A- and B-side I/O pins regardless of VCC setting (2.3–3.6 V), enabling direct interfacing with 5-V TTL, LVTTL, and CMOS logic without external level shifters - a key enabler for mixed-voltage system integration.

Does the 74ALVTH162245LRG4 require external pull-up or pull-down resistors on data lines?

No. The 74ALVTH162245LRG4 includes active bus-hold circuitry on all data inputs (IBHL = 75 µA, IBHH = –75 µA at 3 V), which maintains valid logic states on floating inputs - eliminating the need for external pull resistors and reducing BOM count and board space.

How does the 74ALVTH162245LRG4 support hot insertion in powered backplanes?

The 74ALVTH162245LRG4 supports hot insertion through dual mechanisms: Ioff circuitry limits current to ±100 µA when VCC = 0 V, preventing backdrive damage; and power-up 3-state logic forces outputs into high-impedance below 1.2 V VCC, avoiding bus contention during rail ramp-up.

What is the purpose of the integrated 30-Ω series resistance on the A-port outputs of the 74ALVTH162245LRG4?

The integrated 30-Ω series resistance on each A-port output of the 74ALVTH162245LRG4 provides source termination to match typical PCB trace impedances, suppressing overshoot and undershoot without requiring discrete resistors - simplifying layout and improving signal integrity in high-speed digital interconnects.

Can the 74ALVTH162245LRG4 be used as two independent 8-bit transceivers?

Yes. The 74ALVTH162245LRG4 contains two fully independent 8-bit sections (1A/1B and 2A/2B), each with dedicated DIR and OE controls. This allows concurrent bidirectional operation - for example, A→B on one section while B→A on the other - maximizing flexibility in complex data routing architectures.