Texas Instruments SN74LVTH16240DLRG4

Overview

SN74LVTH16240DLRG4 from Texas Instruments is a 3.3-V ABT 16-bit inverting buffer/driver with 3-state outputs, designed for memory address and bus interface applications in mixed-voltage systems. It supports 5-V input compatibility with 3.3-V VCC, delivers ±64 mA output drive at 3.3 V, and features bus-hold circuitry to eliminate external pullup resistors. Its DL-package SSOP-48 form enables high-density PCB layout in industrial control and telecom backplane designs.

For engineers reviewing the SN74LVTH16240DLRG4 datasheet, SN74LVTH16240DLRG4 pinout, SN74LVTH16240DLRG4 application, or SN74LVTH16240DLRG4 equivalent, key selection criteria include its 3.3-V ABT process, 48-pin SSOP (DL) package, 3-state enable architecture with four independent OE inputs, and verified hot-insertion capability via Ioff and power-up 3-state logic.

Technical Context

This device implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) control (1OE–4OE), enabling flexible partitioning as 4×4-bit, 2×8-bit, or 1×16-bit configurations. Its Advanced BiCMOS Technology (ABT) ensures low static power dissipation while maintaining TTL-compatible thresholds and 5-V tolerant inputs.

The architecture includes distributed VCC/GND pins to suppress high-speed switching noise, flow-through pinout for optimized trace routing, and integrated bus-hold on all data inputs-eliminating external biasing. Power-up 3-state and Ioff protection support live insertion into powered backplanes without signal contention or backdrive damage.

Key Specifications

Pinout & Package

SN74LVTH16240DLRG4 is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm × 1.95 mm body, with 0.5-mm lead pitch and gull-wing terminations. Pin 1 is marked by a beveled corner and located in Quadrant Q1 of the tape reel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16240ADLRG4 and SN74ALVCH16240DLR, SN74LVTH16240DLRG4 uniquely combines 5-V input tolerance, ±64 mA drive, integrated bus-hold, and Ioff-enabled hot insertion-making it the only option qualified for retrofitting 3.3-V logic into existing 5-V infrastructure without redesign.

Availability

SN74LVTH16240DLRG4 is available at Aetrix Electronics and suitable for industrial control systems, telecom line cards, and embedded memory subsystems requiring stable component supply across extended temperature ranges (–40°C to 85°C) and long production lifecycles.

Supply support for SN74LVTH16240DLRG4 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.

SN74LVTH16240DLRG4 belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically to enhance density and performance of 3-state memory address drivers, clock distribution networks, and bidirectional bus transceivers in mixed-voltage environments.

FAQ

What is the operating temperature range for SN74LVTH16240DLRG4?

The SN74LVTH16240DLRG4 is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable functionality in harsh environments such as factory automation controllers and outdoor telecom equipment where thermal cycling and extended uptime are critical. The device maintains full electrical specifications-including propagation delay, drive strength, and bus-hold behavior-across this entire range.

Does SN74LVTH16240DLRG4 support hot insertion into live backplanes?

Yes, SN74LVTH16240DLRG4 supports hot insertion via two complementary mechanisms: Ioff circuitry disables outputs when VCC = 0 V, preventing backdrive current, and power-up 3-state forces outputs into high-impedance during power ramp-up. These features are production-tested per JEDEC standards and validated for use in VMEbus, CompactPCI, and custom backplane systems where field-replaceable modules require zero-downtime maintenance.

Can SN74LVTH16240DLRG4 interface directly with 5-V logic inputs?

Yes, SN74LVTH16240DLRG4 accepts input voltages up to 5.5 V while operating from a 3.3-V supply, enabling direct connection to 5-V TTL or CMOS outputs without external level-shifting circuitry. This 5-V tolerance is guaranteed across the full operating temperature range and applies to all 16 data inputs (A1–A16) and four OE inputs (1OE–4OE), simplifying mixed-voltage system integration.

What package type is used for SN74LVTH16240DLRG4?

SN74LVTH16240DLRG4 uses the SSOP-48 (DL) package: a 12.6 mm × 6.2 mm body with 0.5-mm lead pitch, gull-wing leads, and 1.95-mm maximum height. It is supplied in 1000-unit reels (orderable part number SN74LVTH16240DLR) and complies with RoHS, MSL Level-1, and JEDEC MO-153 standards. The DL package offers superior thermal resistance (θJA = 94°C/W) versus TSSOP alternatives.

How does the bus-hold feature work on SN74LVTH16240DLRG4?

The bus-hold circuitry on SN74LVTH16240DLRG4 actively maintains the last-valid logic state on any unused or floating data input (A1–A16), drawing ±750 µA to hold the node at VIH or VIL thresholds. This eliminates the need for external 10-kΩ pullup/pulldown resistors, reduces BOM cost, saves PCB space, and prevents metastability during power-up or signal glitches-without impacting propagation delay or output drive capability.