Texas Instruments 74ALB16244DGVRE4

Overview

74ALB16244DGVRE4 from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for high-speed 3.3-V operation in bus interface and data routing applications. It features 2 ns typical propagation delay, ±25 mA output drive capability, and industry-standard '16244 pinout in a 48-pin TVSOP package. Used in backplane drivers, memory address buffers, and FPGA I/O expansion.

For engineers reviewing the 74ALB16244DGVRE4 datasheet, 74ALB16244DGVRE4 pinout, 74ALB16244DGVRE4 application, or 74ALB16244DGVRE4 equivalent, key selection criteria include 3.3-V supply compatibility, 3-state output control timing (2.5 ns typical enable time), low-noise distributed V_CC/GND layout, and Schottky-clamped inputs for overshoot suppression.

Technical Context

This device implements four independent 4-bit buffer sections, each with symmetrical active-low output-enable (OE) control and true (noninverting) logic. Each section operates as a unity-gain amplifier with feedback resistors to minimize offset and achieve sub-2 ns propagation delay at 3.3 V.

It uses Advanced Low-Voltage BiCMOS (ALB) technology, integrating Schottky diodes on all inputs to suppress overshoot/undershoot, and distributes V_CC and GND pins across the package to reduce high-speed switching noise. The flow-through pin architecture supports optimized PCB trace routing.

Key Specifications

Pinout & Package

74ALB16244DGVRE4 is housed in a 48-pin Thin Very Small Outline Package (TVSOP, DGV), measuring 7.9 mm × 4.5 mm × 1.05 mm, with 0.4 mm lead pitch and RoHS-compliant CU-NiPdAu finish. JEDEC MO-153 compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244DGVR and SN74LVTH16244DGVR, the 74ALB16244DGVRE4 delivers the lowest propagation delay and highest noise immunity in the 48-pin TVSOP form factor, making it optimal for timing-critical backplane and FPGA interconnect where sub-2 ns latency and overshoot suppression are mandatory.

Availability

74ALB16244DGVRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA-based test equipment, and telecom backplane designs requiring stable component supply and long-term lifecycle support.

Supply support for 74ALB16244DGVRE4 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 over 50 years of innovation in high-reliability interface and signal-path components.

The 74ALB16244 series belongs to TI's Widebus™ family-designed specifically for high-speed, low-voltage bus buffering in computing, communications, and industrial control systems where timing precision and noise resilience are critical.

FAQ

What is the maximum operating frequency supported by the 74ALB16244DGVRE4?

The 74ALB16244DGVRE4 does not specify a maximum clock frequency in its datasheet, as it is a combinational buffer-not a clocked device. Its usable data rate is determined by propagation delay (≤2 ns) and load capacitance. With 50-pF loads, it reliably supports data toggling up to 250 MHz (4 ns period), assuming proper PCB layout and termination.

Does the 74ALB16244DGVRE4 support mixed-voltage operation (e.g., 3.3-V inputs driving 5-V loads)?

No. The 74ALB16244DGVRE4 is strictly a 3.3-V device: V_CC must be 3.0–3.6 V, and outputs swing between 0 V and V_CC. It lacks 5-V-tolerant inputs or overvoltage protection. Driving 5-V loads requires external level-shifting circuitry or a different buffer family such as SN74AVC16T245.

Can the 74ALB16244DGVRE4 be used with only one section enabled while others are disabled?

Yes. Each of the four 4-bit sections (1–4) has an independent active-low output-enable (OE) input (1OE–4OE). You may assert any subset of OE signals to activate corresponding Y outputs while keeping others in high-impedance state-enabling partial bus utilization and dynamic resource allocation.

Is the 74ALB16244DGVRE4 pin-compatible with the SN74ALB16244DL package variant?

Yes. Both 74ALB16244DGVRE4 (TVSOP-DGV) and SN74ALB16244DL (SSOP-DL) share identical pin numbering, function mapping, and logic behavior per the '16244 standard. However, their footprints differ: DGV is 7.9 mm × 4.5 mm (0.4 mm pitch), DL is 15.8 mm × 7.5 mm (0.635 mm pitch); PCB redesign is required for physical substitution.

What thermal considerations apply when operating the 74ALB16244DGVRE4 at full 16-bit switching?

At worst-case 3.6-V supply and all 16 outputs switching simultaneously into 50-pF loads, total ICC peaks near 90 mA. With θ_JA = 58°C/W, junction temperature rise is ~5.2°C above ambient. No heatsink is needed below 85°C ambient, but ensure ≥2 cm² of 1-oz copper pour under the package for optimal conduction cooling.