Texas Instruments 74ALVTH16244ZQLR

Overview

74ALVTH16244ZQLR from Texas Instruments is a 2.5-V/3.3-V 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-voltage bus interfacing between 3.3-V logic and 5-V TTL systems. It features bus-hold circuitry on all data inputs, Ioff support for hot insertion, and high drive capability (–32 mA/64 mA). It operates across –40°C to 85°C and supports 2.3 V minimum VCC for unregulated battery operation.

For engineers reviewing the 74ALVTH16244ZQLR datasheet, 74ALVTH16244ZQLR pinout, 74ALVTH16244ZQLR application, or 74ALVTH16244ZQLR equivalent, this device is selected for level-shifting, bus buffering, and hot-pluggable backplane interfaces where 5-V input tolerance, low ground bounce (<0.8 V), and auto-3-state behavior are critical.

Technical Context

The 74ALVTH16244ZQLR implements four independent 4-bit buffer sections, each controlled by a dedicated output-enable (OE) input. Its ABT BiCMOS architecture enables 5-V-tolerant inputs while operating from a 2.5-V or 3.3-V supply, supporting true mixed-mode signal operation without external level shifters.

Bus-hold circuitry actively maintains valid logic states on floating inputs, eliminating external pullup/pulldown resistors. Ioff protection disables outputs during power-down to prevent backflow current, and power-up 3-state ensures outputs remain high-impedance until VCC stabilizes above 1.2 V.

Key Specifications

Pinout & Package

74ALVTH16244ZQLR is packaged in a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 7.9 mm × 12.5 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH16244GR and 74LVC16244APAG, the 74ALVTH16244ZQLR uniquely delivers 5-V input tolerance, Ioff, bus-hold, and auto-3-state in a single package-enabling drop-in replacement in legacy 5-V–3.3-V hybrid systems without layout or BOM changes.

Availability

74ALVTH16244ZQLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, hot-pluggable module buffers, low-voltage battery-powered systems, and high-density memory expansion interfaces requiring stable component supply and long-term obsolescence management.

Supply support for 74ALVTH16244ZQLR 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 leadership in logic interface solutions.

The ALVTH family was engineered specifically for mixed-voltage system interoperability-delivering robust 5-V-tolerant buffering, hot-swap readiness, and ultra-low static power in advanced BiCMOS processes for industrial, telecom, and computing infrastructure.

FAQ

What is the maximum operating temperature range for the 74ALVTH16244ZQLR?

The 74ALVTH16244ZQLR is characterized for operation from –40°C to +85°C ambient temperature. This commercial-grade rating aligns with the SN74ALVTH16244 variant (not the military-grade SN54ALVTH16244), making it suitable for industrial and embedded applications where extended thermal stability is required without mil-spec cost premiums.

Does the 74ALVTH16244ZQLR support true 5-V input compatibility without external components?

Yes, the 74ALVTH16244ZQLR accepts input voltages from 0 V to 5.5 V regardless of VCC level (2.3–3.6 V), enabling direct connection to 5-V TTL buses. No series resistors, clamping diodes, or level-shifting ICs are needed-verified per absolute maximum ratings and recommended operating conditions in the TI SCES070G datasheet.

How does the auto-3-state function work in the 74ALVTH16244ZQLR?

The 74ALVTH16244ZQLR enters high-impedance output state automatically whenever any output voltage exceeds VCC - a built-in feature that prevents bus contention during voltage transients, hot-swap events, or mismatched supply sequencing. This behavior is intrinsic to the ABT BiCMOS design and requires no external circuitry or OE pin control.

Can the 74ALVTH16244ZQLR be used with a 2.5-V supply?

Yes, the 74ALVTH16244ZQLR is fully specified for 2.5-V ±0.2-V operation per the datasheet. At 2.5 V, it delivers 18 mA/24 mA output drive, maintains bus-hold functionality, and retains 5-V input tolerance - making it ideal for systems transitioning between 2.5-V and 3.3-V logic domains.

What package type is used for the 74ALVTH16244ZQLR?

The 74ALVTH16244ZQLR uses a 48-pin Thin Shrink Small-Outline Package (TSSOP), designated DGG by Texas Instruments. It measures 7.9 mm × 12.5 mm with 0.5 mm lead pitch and 1.2 mm maximum height, complying with JEDEC MO-153 and optimized for high-density PCB layouts.