Texas Instruments SN74LVTH16240DLR

Overview

SN74LVTH16240DLR from Texas Instruments is a 3.3-V ABT 16-bit inverting buffer/driver with 3-state outputs, designed for memory address, clock, and bus interface applications in mixed-voltage systems. It supports 5-V input/output compatibility with 3.3-V VCC, delivers ±64 mA output drive at 3.3 V, and features bus-hold circuitry eliminating external pullup/pulldown resistors.

For engineers reviewing the SN74LVTH16240DLR datasheet, SN74LVTH16240DLR pinout, SN74LVTH16240DLR application, or SN74LVTH16240DLR equivalent, key selection considerations include its 48-pin SSOP (DL) package, active-low 3-state enable architecture across four independent 4-bit sections, hot-insertion support via Ioff and power-up 3-state, and guaranteed operation from –40°C to 85°C.

Technical Context

This device implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE). Its Advanced BiCMOS Technology (ABT) enables low static power dissipation while maintaining TTL-compatible thresholds and 5-V tolerant inputs.

The distributed VCC/GND pin layout minimizes high-speed switching noise, and flow-through pin arrangement optimizes PCB trace routing. Bus-hold circuitry maintains valid logic states on unused inputs without external components, and Ioff protection prevents backflow current during hot insertion or partial power-down.

Key Specifications

Pinout & Package

SN74LVTH16240DLR uses 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 leads. Pin 1 marked by notch or beveled corner; pin 1 quadrant confirmed Q1 per TI tape-and-reel specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74LVTH16240DLR, both alternatives lack 5-V input tolerance and bus-hold, limiting use in mixed-voltage upgrades or uncontrolled input environments; SN74LVTH16240DLR remains optimal for legacy interface consolidation where robustness, voltage flexibility, and reduced external components are mandatory.

Availability

SN74LVTH16240DLR is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, clock distribution networks, and legacy-to-modern interface bridging requiring stable component supply and long-term manufacturability.

Supply support for SN74LVTH16240DLR 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 innovation in high-reliability interface and power management ICs.

SN74LVTH16240DLR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically to enhance density and performance of 3-state memory address drivers, clock drivers, and bus-oriented transceivers in mixed-voltage systems.

FAQ

What is the operating temperature range for SN74LVTH16240DLR?

The SN74LVTH16240DLR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation, telecom infrastructure, and embedded computing environments where thermal stability is critical. The device maintains full electrical specifications-including output drive, propagation delay, and bus-hold functionality-across this entire range.

Does SN74LVTH16240DLR support hot-plug insertion?

Yes, SN74LVTH16240DLR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.5 V. These mechanisms eliminate bus contention and protect upstream drivers during live card replacement in modular systems such as industrial backplanes or telecom line cards.

Can SN74LVTH16240DLR interface directly with 5-V logic?

Yes, SN74LVTH16240DLR accepts input voltages up to 5.5 V and drives outputs compatible with 5-V TTL levels while operating from a 3.3-V supply. Its ABT process ensures robust 5-V tolerance without external level shifters-making it ideal for upgrading legacy 5-V systems with modern 3.3-V controllers while preserving signal integrity and timing margins.

What package type does SN74LVTH16240DLR use, and what are its key mechanical dimensions?

SN74LVTH16240DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL) measuring 12.6 mm × 6.2 mm × 1.95 mm with 0.5-mm lead pitch. Its gull-wing leads and Q1 pin-1 orientation comply with JEDEC MO-153 standards. The DL package offers higher pin density than standard SOIC while maintaining compatibility with standard SMT assembly processes and reflow profiles (MSL Level-1).

How does the bus-hold feature work on SN74LVTH16240DLR, and what design benefit does it provide?

The bus-hold circuitry on SN74LVTH16240DLR actively maintains the last-valid logic state on any unused or floating input pin using ±750 µA dynamic feedback current. This eliminates the need for external 10-kΩ pullup/pulldown resistors-reducing BOM cost, saving PCB area, and removing potential sources of noise or timing uncertainty in high-density layouts where input routing may be incomplete during debug or partial configuration.