Texas Instruments SN74ABT16244ADL

Overview

SN74ABT16244ADL from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for high-density memory address, clock, and bus driver applications. It features –32-mA high-drive IOH, 64-mA IOL output capability, operates at 4.5–5.5 V, and is rated for –40°C to 85°C industrial temperature range in a 48-pin SSOP (DL) package.

For engineers reviewing the SN74ABT16244ADL datasheet, SN74ABT16244ADL pinout, SN74ABT16244ADL application, or SN74ABT16244ADL equivalent, key selection considerations include its symmetrical active-low OE control per 4-bit group, distributed VCC/GND pinning for noise reduction, flow-through architecture for PCB layout optimization, and compatibility with 5-V TTL/CMOS systems requiring high-current drive and fast 3-state switching.

Technical Context

This device implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE). All outputs enter high-impedance state when corresponding OE is high, enabling bus sharing without contention.

Its EPIC-IIB™ BiCMOS process delivers low power dissipation while supporting high-speed switching: typical propagation delays are 1–3.5 ns (A→Y) and 1–4.8 ns (OE→Y), with output ground bounce (VOLP) <1 V at 5 V and 25°C. Distributed power/ground pins and flow-through pinout minimize simultaneous switching noise.

Key Specifications

Pinout & Package

SN74ABT16244ADL uses a 48-pin Shrink Small-Outline Package (SSOP, DL) with 0.5-mm lead pitch and 12.6 mm × 7.9 mm body dimensions. Pin 1 is located at top-left corner with notch or dot marking; leads are gull-wing, coplanarity ≤0.1 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16244ADGGR and SN74ABT16244ADGVR, the SN74ABT16244ADL offers the largest pad pitch (0.5 mm) and highest mechanical robustness in tube packaging - ideal for prototyping, low-volume production, and manual rework scenarios where solder joint reliability under thermal cycling is critical.

Availability

SN74ABT16244ADL is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface designs, and embedded memory expansion applications requiring stable component supply and long-term manufacturability.

Supply support for SN74ABT16244ADL 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 90 years of innovation in industrial, automotive, and communications markets.

The SN74ABT16244ADL belongs to TI's Widebus™ family of high-speed, high-drive logic devices - engineered specifically to replace older 74-series buffers in memory, clock, and bus-oriented systems demanding improved density, noise immunity, and drive strength.

FAQ

What is the maximum operating voltage for SN74ABT16244ADL?

The absolute maximum supply voltage for SN74ABT16244ADL is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V per the datasheet. Operating outside this window risks parametric shift or latch-up; the device is not characterized for 3.3-V operation and lacks 5-V tolerant inputs in lower-voltage modes.

Does SN74ABT16244ADL support hot insertion or live bus connection?

Yes - SN74ABT16244ADL incorporates bus-hold circuitry and robust ESD protection (exceeding JESD 70 latch-up >500 mA), and its high-impedance state is guaranteed during power-up when OE is pulled to VCC. This makes SN74ABT16244ADL suitable for hot-plug applications such as modular backplanes and field-replaceable I/O cards.

How many independent output-enable controls does SN74ABT16244ADL have?

SN74ABT16244ADL has four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE - each controlling a separate 4-bit buffer section (e.g., 1OE enables Y1–Y4 only). This allows selective activation of bus segments without affecting other channels.

Can SN74ABT16244ADL be used with 3.3-V logic inputs?

No - SN74ABT16244ADL is a 5-V-only device with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max); it is not 3.3-V tolerant. Direct connection to 3.3-V logic may cause undefined switching or excessive input current. A level-shifter or dual-supply buffer is required for mixed-voltage interfacing.

What is the thermal resistance (θJA) of SN74ABT16244ADL in its SSOP package?

The junction-to-ambient thermal resistance (θJA) for SN74ABT16244ADL in the DL (SSOP) package is 94°C/W, measured under standard JEDEC JESD 51 conditions. This value assumes a two-layer board with 1-in² copper pour; actual thermal performance improves with internal layers and thermal vias.