Texas Instruments 74LVTH162244ZRDR

Overview

74LVTH162244ZRDR from Texas Instruments is a 3.3-V ABT 16-bit buffer/driver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It provides true outputs, four independent 4-bit channels, bus-hold on all data inputs, and integrated 22-Ω series output resistors to suppress overshoot/undershoot - used in high-speed backplane and memory interface applications.

For engineers reviewing the 74LVTH162244ZRDR datasheet, 74LVTH162244ZRDR pinout, 74LVTH162244ZRDR application, or 74LVTH162244ZRDR equivalent, key selection considerations include its 54-ball ZRD VFBGA package, -40°C to 85°C industrial temperature range, Ioff-enabled hot-insertion support, 12 mA output drive capability, and compatibility with TTL-level inputs at 3.3-V VCC.

Technical Context

The 74LVTH162244ZRDR implements a flow-through pin architecture across four independent 4-bit buffer sections, each with symmetrical active-low output-enable (OE) control. Its ABT (Advanced BiCMOS Technology) core enables 3.3-V operation while accepting 5-V-tolerant inputs and delivering TTL-compatible output swing.

It integrates bus-hold circuitry on all A-inputs to maintain valid logic states without external pull resistors, and features power-up/power-down 3-state behavior with Ioff protection to prevent backflow current during hot insertion. Output ports embed 22-Ω series termination, eliminating need for discrete series resistors in point-to-point routing.

Key Specifications

Pinout & Package

74LVTH162244ZRDR uses a 54-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package designated ZRD (Pb-free), measuring 7.0 mm × 4.5 mm × 1.0 mm (max height). The package features distributed VCC/GND balls to minimize switching noise and supports reflow soldering per Level-3 JEDEC MSL rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVTH162244DLR and SN74LVC16244ADGGR, the 74LVTH162244ZRDR uniquely combines 5-V input tolerance, integrated 22-Ω termination, bus-hold, and ultra-compact ZRD packaging - making it optimal for space-constrained, mixed-voltage, hot-plug-capable industrial backplanes.

Availability

74LVTH162244ZRDR is available at Aetrix Electronics and suitable for industrial backplane buffering, memory interface translation, hot-swappable module interfaces, and high-density PCB signal isolation requiring stable component supply and long-term lifecycle support.

Supply support for 74LVTH162244ZRDR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The 74LVTH162244ZRDR belongs to TI's Widebus™ family of high-speed interface ICs, engineered specifically for voltage translation, bus isolation, and noise-immune signal conditioning in mixed-voltage industrial and telecom infrastructure systems.

FAQ

What is the package type and dimensions of the 74LVTH162244ZRDR?

The 74LVTH162244ZRDR uses a 54-ball Pb-free VFBGA package designated ZRD, with body dimensions of 7.0 mm × 4.5 mm × 1.0 mm maximum height. It complies with JEDEC MO-164AC and is rated MSL Level-3 for moisture sensitivity, requiring bake-out only if exposed beyond floor life. This compact footprint supports high-density routing in space-constrained applications such as modular telecom cards and embedded controllers.

Does the 74LVTH162244ZRDR support 5-V input signals while operating at 3.3-V VCC?

Yes, the 74LVTH162244ZRDR supports input voltages up to 5.5 V while powered from a 2.7 V to 3.6 V VCC supply. This mixed-mode capability is inherent to its ABT process and allows direct interfacing with legacy 5-V TTL logic without external level shifters. Input clamp current is specified at ±50 mA, and VIH/VIL thresholds remain valid across the full 5-V input range.

How does the bus-hold feature work on the 74LVTH162244ZRDR, and can it be disabled?

The 74LVTH162244ZRDR includes active bus-hold circuitry on all data inputs (A1–A16), which maintains the last-valid logic state when inputs float. It draws ±75 µA minimum dynamic current to switch states and requires no external components. Bus-hold cannot be disabled via pin or register - it is always active. TI recommends against using pullup/pulldown resistors concurrently, as they may conflict with internal hold strength.

What is the maximum output drive capability of the 74LVTH162244ZRDR, and how does it affect signal integrity?

The 74LVTH162244ZRDR delivers ±12 mA output drive per channel under recommended conditions. Combined with built-in 22-Ω series resistors, this limits edge slew rate and suppresses overshoot/undershoot on PCB traces, improving signal integrity without external termination. At 3.3 V VCC and 12 mA load, VOL is guaranteed ≤ 0.8 V and VOH ≥ 2.0 V, meeting TTL output swing requirements.

Is the 74LVTH162244ZRDR suitable for hot-insertion applications, and what protections enable this?

Yes, the 74LVTH162244ZRDR is explicitly designed for hot-insertion use cases. It incorporates two key protections: Ioff circuitry disables outputs when VCC = 0, blocking back-current flow from live buses into unpowered devices; and power-up 3-state ensures outputs remain high-impedance until VCC exceeds 1.5 V. Both features are production-tested and documented in TI's SCBS258N datasheet.