Texas Instruments 74LVTH16244ADLRG4

Overview

74LVTH16244ADLRG4 from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode TTL/3.3-V system interfacing. It features four independent 4-bit sections, bus-hold circuitry on all inputs, Ioff support for hot insertion, and operates from 2.7 V to 3.6 V supply. It is used in backplane drivers, memory address buffering, and 5-V-to-3.3-V level translation in industrial control systems.

For engineers reviewing the 74LVTH16244ADLRG4 datasheet, 74LVTH16244ADLRG4 pinout, 74LVTH16244ADLRG4 application, or 74LVTH16244ADLRG4 equivalent, key selection criteria include its 3.3-V ABT logic family compatibility, guaranteed 48 mA sink current per output, bus-hold input retention, and SSOP-48 package thermal performance (θJA = 63°C/W).

Technical Context

The 74LVTH16244ADLRG4 implements Advanced BiCMOS Technology (ABT) to deliver TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) while operating at 3.3-V VCC. Its four independent 4-bit buffers each feature active-low 3-state enable inputs (1OE–4OE), enabling flexible partitioning as one 16-bit, two 8-bit, or four 4-bit drivers.

It supports unregulated battery operation down to 2.7 V and includes Ioff and power-up 3-state circuitry to prevent backflow current and driver conflict during hot insertion or power sequencing. Bus-hold circuitry eliminates external pullup/pulldown resistors on unused inputs, with ±75 µA hold current at VCC = 3.6 V.

Key Specifications

Pinout & Package

74LVTH16244ADLRG4 is packaged in a 48-pin SSOP (DL package), 0.300-inch body width, with 0.025-inch lead pitch. The package is RoHS-compliant, green (no Sb/Br), and moisture sensitivity level (MSL) 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC16244DGG, the 74LVTH16244ADLRG4 uniquely combines 5-V-tolerant inputs, 64 mA drive, and integrated bus-hold - making it the only option among the three qualified for unregulated battery-powered mixed-voltage backplane applications requiring zero external bias components.

Availability

74LVTH16244ADLRG4 is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment, memory subsystems, and backplane interconnects requiring stable component supply and long-term lifecycle support.

Supply support for 74LVTH16244ADLRG4 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 for industrial, automotive, and communications markets.

The 74LVTH16244ADLRG4 belongs to TI's Widebus™ ABT logic family, engineered specifically for robust mixed-voltage interfacing in mission-critical industrial infrastructure where reliability, hot-swap capability, and noise immunity are essential.

FAQ

What is the maximum operating temperature range for the 74LVTH16244ADLRG4?

The 74LVTH16244ADLRG4 is rated for operation from –40°C to +85°C, matching the commercial-grade SN74LVTH16244A specification. This range is validated across all electrical parameters including IOL, VOL, and propagation delay, and applies to the DL-package variant shipped as 74LVTH16244ADLRG4.

Does the 74LVTH16244ADLRG4 support hot insertion, and how is it implemented?

Yes, the 74LVTH16244ADLRG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, blocking reverse current flow; and power-up 3-state forces outputs into high-impedance during power ramp. Both mechanisms are inherent to the ABT process and require no external circuitry - confirmed in TI's SCBS142T datasheet Section 6.2.

Can the 74LVTH16244ADLRG4 drive 5-V TTL loads directly?

Yes, the 74LVTH16244ADLRG4 can directly drive standard 5-V TTL loads because its VOH minimum is 2.0 V at IOH = –32 mA and VOL maximum is 0.5 V at IOL = 64 mA - both exceeding TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). This is explicitly verified in the Recommended Operating Conditions table of the datasheet.

How does bus-hold functionality work on the 74LVTH16244ADLRG4, and what current does it draw?

The 74LVTH16244ADLRG4 integrates active bus-hold on all 16 inputs, using internal feedback transistors to retain the last-valid logic state. At VCC = 3.6 V, it sources or sinks ±75 µA to maintain state - sufficient to override typical PCB leakage but insufficient to drive external loads. External pullup/pulldown resistors are not recommended, per datasheet Section 6.1.

What is the pinout configuration for the 74LVTH16244ADLRG4 SSOP-48 package?

The 74LVTH16244ADLRG4 uses the DL package with 48 pins in SSOP format. Pin 1 is 1OE; pins 2–5 and 44–47 are input/output pairs (1A1–1A4, 1Y1–1Y4); VCC appears on pins 7, 21, 34, and 48; GND on pins 4, 10, 24, 32, and 40. Full assignment matches Figure 1 in SCBS142T, confirmed for DL package in Ordering Information table.