Texas Instruments SN74ALB16244DGVR

Overview

SN74ALB16244DGVR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for high-speed 3.3-V operation in memory address/data bus driving, backplane interface, and hot-swap applications. It features 2 ns max propagation delay, ±25 mA output drive per channel, true (noninverted) logic outputs, and active-low OE control per 4-bit group.

For engineers reviewing the SN74ALB16244DGVR datasheet, SN74ALB16244DGVR pinout, SN74ALB16244DGVR application, or SN74ALB16244DGVR equivalent, key selection criteria include 3.3-V supply compatibility, 48-pin TSSOP package footprint, 3-state bus isolation capability, and low-noise ALB BiCMOS process performance in dense PCB layouts.

Technical Context

The SN74ALB16244DGVR implements four independent 4-bit buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE), enabling granular bus segment control. Its ALB (Advanced Low-Voltage BiCMOS) architecture integrates Schottky-clamped inputs to suppress overshoot/undershoot and distributed V_CC/GND pins to minimize simultaneous switching noise.

It supports flexible configuration as one 16-bit, two 8-bit, or four 4-bit buffers. The flow-through pinout-inputs on one side, outputs on the opposite-optimizes trace routing and reduces layer count in high-density designs, while unity-gain input amplifiers ensure tight input-to-output tracking with minimal offset voltage.

Key Specifications

Pinout & Package

SN74ALB16244DGVR uses a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 12.6 mm × 6.2 mm × 1.2 mm max height, JEDEC MO-153 compliant, with gull-wing leads and 0.5-mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and SN74ABT16244DGGR, the SN74ALB16244DGVR uniquely balances 2-ns speed, 3.3-V native operation, and robust ±25 mA drive - making it optimal for new 3.3-V high-speed bus designs where timing margin and noise immunity are critical.

Availability

SN74ALB16244DGVR is available at Aetrix Electronics and suitable for memory subsystems, backplane interfaces, hot-swap I/O modules, and industrial PLC expansion requiring stable component supply and long-term lifecycle support.

Supply support for SN74ALB16244DGVR 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 experience in high-reliability logic and interface solutions.

The SN74ALB16244DGVR belongs to TI's Widebus™ family of high-speed bus-interface ICs, engineered specifically for low-voltage, high-fanout applications in computing, communications, and industrial control systems.

FAQ

What is the maximum operating temperature for SN74ALB16244DGVR?

The SN74ALB16244DGVR is rated for continuous operation from –40°C to +85°C ambient temperature. This range is validated per its recommended operating conditions and supported by thermal characterization (θ_JA = 70°C/W for the DGG package), ensuring reliability in industrial and telecom environments where ambient temperatures may fluctuate significantly. The device maintains specified timing and drive performance across this full range.

Does SN74ALB16244DGVR support hot-swap operation?

Yes, SN74ALB16244DGVR supports hot-swap operation through its 3-state outputs and Schottky-clamped inputs. When OE is held high (disabled), outputs enter high-impedance state, preventing bus contention during insertion. Input clamps limit transient voltages to within safe limits (–0.5 V to V_CC + 0.5 V), protecting against insertion spikes. System-level hot-swap functionality also requires proper power sequencing and current limiting, which SN74ALB16244DGVR enables but does not replace.

Is SN74ALB16244DGVR pin-compatible with older 74-series 16-bit buffers?

Yes, SN74ALB16244DGVR implements the industry-standard '16244 pinout, matching legacy devices such as SN74LS16244 and SN74ALS16244. All 48 pins-including group-specific OE inputs, input/output assignments, and distributed V_CC/GND locations-are identical. This allows direct PCB-level replacement in existing designs without layout changes, provided the 3.3-V supply and timing margins are verified.

What is the typical supply current per buffer in SN74ALB16244DGVR?

The typical supply current per buffer in SN74ALB16244DGVR is 5.6 mA at V_CC = 3.6 V, with all inputs at V_CC or GND and outputs unloaded. Total ICC for all 16 channels is approximately 90 mA under static conditions. In 3-state mode (OE high), ICC drops to 0.8 mA (ICCZ), reflecting the ALB process's low quiescent power - critical for power-sensitive backplane and portable industrial applications.

Can SN74ALB16244DGVR be used with 2.5-V or 1.8-V logic families?

No, SN74ALB16244DGVR is not designed for 2.5-V or 1.8-V operation. Its recommended V_CC range is strictly 3.0 V to 3.6 V, and its input thresholds and output drive characteristics are optimized for 3.3-V signaling. Using it below 3.0 V risks undefined logic states, increased propagation delay, and reduced noise margin. For 2.5-V or 1.8-V systems, TI's LVC or AVC families (e.g., SN74LVC16244A) are appropriate alternatives.