Texas Instruments SN74LVTH162245DLG4

Overview

SN74LVTH162245DLG4 from Texas Instruments is a 3.3-V ABT 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for mixed-mode signal operation between 3.3-V and 5-V systems. It features 48-pin SSOP packaging, ±12 mA A-port drive capability, integrated 22-Ω series output resistors, and bus-hold circuitry eliminating external pullup/pulldown resistors. It enables bidirectional data flow between A and B buses in industrial backplane interfaces.

For engineers reviewing the SN74LVTH162245DLG4 datasheet, SN74LVTH162245DLG4 pinout, SN74LVTH162245DLG4 application, or SN74LVTH162245DLG4 equivalent, key selection criteria include its 3.3-V VCC operation with 5-V tolerant I/O, hot-insertion support via Ioff and power-up 3-state, low ground bounce (<0.8 V), and flow-through pinout optimized for PCB layout in high-density interconnect systems.

Technical Context

The SN74LVTH162245DLG4 implements a dual-octal transceiver architecture with independent direction-control (DIR) and output-enable (OE) inputs per 8-bit section. Its A-port outputs integrate 22-Ω series resistors to suppress overshoot/undershoot, while both A and B ports support TTL-level signaling at 3.3-V VCC with 5-V input tolerance.

It delivers hot-insertion capability through Ioff circuitry that disables outputs during power-down and power-up 3-state logic that forces high-impedance on power ramp. Bus-hold circuitry maintains valid logic states on undriven inputs, and distributed VCC/GND pins minimize switching noise in high-speed data paths.

Key Specifications

Pinout & Package

SN74LVTH162245DLG4 uses a 48-pin SSOP (Shrink Small Outline Package) with 0.5-mm pitch, 12.6 mm × 6.2 mm body size, and 1.2 mm max height. The package features gull-wing leads, RoHS-compliant NiPdAu plating, and MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC162245DGGR and SN74AVC162245GRDR, the SN74LVTH162245DLG4 uniquely combines 5-V tolerant I/O, integrated 22-Ω output resistors, active bus-hold, and hot-insertion support in a single 48-pin SSOP package-making it optimal for robust, mixed-voltage industrial backplane designs where reliability and layout simplicity are critical.

Availability

SN74LVTH162245DLG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, high-density data acquisition systems, and hot-swappable module interconnects requiring stable component supply over extended production lifecycles.

Supply support for SN74LVTH162245DLG4 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 connectivity technologies, with decades of experience in high-reliability interface ICs for industrial and automotive markets.

The SN74LVTH162245DLG4 belongs to TI's Widebus™ family of ABT transceivers, engineered specifically for robust, mixed-voltage bus interfacing in harsh industrial environments where signal integrity, hot-swap resilience, and long-term supply stability are mandatory.

FAQ

What is the maximum operating temperature range for SN74LVTH162245DLG4?

The SN74LVTH162245DLG4 is rated for operation from –40°C to +85°C ambient temperature, making it suitable for commercial and industrial environments. This range is confirmed in the Recommended Operating Conditions table of the official datasheet (SCBS260Q), and applies specifically to the DL-package variant including SN74LVTH162245DLG4.

Does SN74LVTH162245DLG4 support true 5-V output drive?

No - SN74LVTH162245DLG4 does not drive 5-V logic levels. Its outputs swing between GND and VCC (2.7–3.6 V), but its inputs tolerate up to 5.5 V. This allows safe connection to 5-V drivers while maintaining 3.3-V signaling levels, as explicitly stated in the "Support Mixed-Mode Signal Operation" feature and VI specification.

Can SN74LVTH162245DLG4 be used as a single 16-bit transceiver or only as dual 8-bit units?

Yes - SN74LVTH162245DLG4 can operate flexibly as either two independent 8-bit transceivers (using separate 1DIR/1OE and 2DIR/2OE controls) or as one unified 16-bit transceiver by tying both DIR and OE inputs together. This dual-mode capability is documented in the device description and function table of the datasheet.

What is the purpose of the 22-Ω series resistors on the A-port outputs of SN74LVTH162245DLG4?

The 22-Ω series resistors on each A-port output of SN74LVTH162245DLG4 are internal, fixed-value terminations designed to damp signal reflections and reduce overshoot/undershoot in transmission-line environments. They eliminate the need for external series resistors in point-to-point or short-bus configurations, as highlighted in the "A-Port Outputs Have Equivalent 22-Ω Series Resistors" feature.

Is bus-hold functionality enabled by default on SN74LVTH162245DLG4, and does it require external components?

Yes - bus-hold circuitry is permanently enabled on all data I/O pins of SN74LVTH162245DLG4 and requires no configuration or external components. It actively holds undriven inputs at their last-valid logic state using ±75 µA dynamic current, as specified in the II(hold) parameter table. External pullup/pulldown resistors are explicitly discouraged when bus-hold is active.