Texas Instruments SN74LVTH162240DLR

Overview

SN74LVTH162240DLR from Texas Instruments is a 3.3-V ABT 16-bit inverting buffer/driver with 3-state outputs, designed for memory address driving, clock distribution, and bus-oriented transceivers in mixed-voltage systems. It supports 5-V input compatibility with 3.3-V V_CC, delivers ±12 mA output drive, integrates 22-Ω series output resistors, and operates from –40°C to 85°C in a 48-pin SSOP (DL) package.

For engineers reviewing the SN74LVTH162240DLR datasheet, SN74LVTH162240DLR pinout, SN74LVTH162240DLR application, or SN74LVTH162240DLR equivalent, key selection criteria include 3-state enable timing (t_PZL = 4.7 ns max), bus-hold on all data inputs, I_off-enabled hot insertion support, and dual-rail voltage tolerance (V_I up to 5.5 V).

Technical Context

The SN74LVTH162240DLR implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control. Its Advanced BiCMOS Technology (ABT) enables low static power at 3.3 V while maintaining TTL-compatible thresholds and 5-V tolerant inputs.

Each output features integrated 22-Ω series resistance to suppress overshoot/undershoot without external termination. Bus-hold circuitry maintains valid logic levels on floating inputs, and I_off protection disables outputs during power-down to prevent backflow current.

Key Specifications

Pinout & Package

SN74LVTH162240DLR is housed in a 48-pin Shrink Small-Outline Package (SSOP), DL variant, with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and 1.2 mm max height. Pin 1 is located at the top-left corner of the package, marked by a beveled edge or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit inverting buffer applications.

Compared with SN74LVC16244ADGGR and SN74AVC16T245DGGR, the SN74LVTH162240DLR uniquely combines inversion, bus-hold, integrated 22-Ω resistors, and 5-V input tolerance - making it optimal for legacy-compatible, space-constrained, and noise-sensitive 3.3-V bus driver designs.

Availability

SN74LVTH162240DLR is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, clock distribution networks, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74LVTH162240DLR 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 expertise in high-reliability logic and interface solutions.

The SN74LVTH162240DLR belongs to TI's Widebus™ family of advanced 3.3-V ABT logic devices, engineered for high-speed, low-noise bus interfacing in mixed-voltage industrial and computing systems.

FAQ

What is the operating temperature range for the SN74LVTH162240DLR?

The SN74LVTH162240DLR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable performance in demanding environments such as factory automation controllers, network infrastructure equipment, and automotive under-hood modules where thermal cycling and extended temperature exposure occur. The device maintains full electrical specifications across this range per TI's SCBS685F datasheet.

Does the SN74LVTH162240DLR support hot insertion?

Yes, the SN74LVTH162240DLR supports hot insertion through two complementary features: I_off circuitry disables outputs when V_CC = 0, preventing backflow current, and power-up 3-state ensures outputs remain high-impedance during V_CC ramp-up or ramp-down. These mechanisms are validated per JEDEC standards and enable safe live replacement in modular backplane systems without disrupting bus operation - a key requirement confirmed in the SN74LVTH162240DLR datasheet Section 6.3.

Can the SN74LVTH162240DLR interface directly with 5-V logic inputs?

Yes, the SN74LVTH162240DLR accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct connection to 5-V TTL or CMOS outputs without external level-shifting circuitry. This mixed-mode capability is explicitly specified in the "Recommended Operating Conditions" table (VI = 5.5 V max) and verified across –40°C to 85°C in the SN74LVTH162240DLR datasheet, making it ideal for upgrading legacy 5-V subsystems with modern 3.3-V controllers.

What is the purpose of the integrated 22-Ω series resistors on SN74LVTH162240DLR outputs?

The integrated 22-Ω series resistors on each SN74LVTH162240DLR output reduce signal overshoot and undershoot caused by transmission-line reflections on PCB traces, especially in high-speed or unterminated buses. This eliminates the need for discrete series termination resistors, saving board space and assembly cost. Measured performance shows typical V_OLP < 0.8 V at V_CC = 3.3 V, confirming effective edge control - a design feature documented in the SN74LVTH162240DLR datasheet Features list and Electrical Characteristics table.

How does bus-hold functionality work on the SN74LVTH162240DLR?

Bus-hold circuitry on the SN74LVTH162240DLR actively maintains the last-valid logic state on any unused or floating data input (1A1–4A4), using ±750 µA dynamic hold current to counteract leakage or noise. This eliminates external pullup/pulldown resistors and prevents metastability in partially configured systems. The feature is enabled by default and functions across the full operating temperature and voltage range, as verified in the SN74LVTH162240DLR Electrical Characteristics table (II(hold) parameter).