Texas Instruments SN74ALB16244DGGR

Overview

SN74ALB16244DGGR from Texas Instruments is a 16-bit non-inverting buffer/driver with 3-state outputs, designed for high-speed 3.3-V operation in bus interface and data routing applications. It features 1.3 ns typical propagation delay, ±25 mA output drive capability, and symmetrical active-low OE inputs per 4-bit section. Used in memory address/data buffering and backplane driving where low-voltage compatibility and noise immunity are critical.

For engineers reviewing the SN74ALB16244DGGR datasheet, SN74ALB16244DGGR pinout, SN74ALB16244DGGR application, or SN74ALB16244DGGR equivalent, key selection criteria include 3.3-V supply compliance, 48-pin TSSOP (DGG) package footprint, 3-state output control timing (ten = 2.5 ns typ), and ALB BiCMOS process advantages over standard TTL or CMOS drivers.

Technical Context

The SN74ALB16244DGGR implements four independent 4-bit buffer sections, each with dedicated active-low output-enable (OE) control. Its Advanced Low-Voltage BiCMOS (ALB) architecture enables fast switching while maintaining TTL-compatible input thresholds and 3.3-V supply operation.

Distributed V_CC and GND pins across the 48-pin TSSOP package minimize simultaneous switching noise, and Schottky diodes on all inputs suppress overshoot/undershoot-critical for signal integrity in dense PCB layouts with high fan-out loads.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm max height, 0.5-mm lead pitch, gull-wing leads, JEDEC MO-153 compliant. Pin 1 marked via corner chamfer; pin 1 ID area located at top-left corner when viewed top-side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC16244PW,118, the SN74ALB16244DGGR delivers superior speed-noise trade-off via ALB BiCMOS and integrated input clamping-making it preferred for timing-critical, noise-sensitive 3.3-V bus interfaces where layout space for discrete protection is constrained.

Availability

SN74ALB16244DGGR is available at Aetrix Electronics and suitable for memory subsystems, backplane interconnects, and FPGA I/O expansion requiring stable component supply and long-term industrial temperature support (–40°C to 85°C).

Supply support for SN74ALB16244DGGR 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 high-reliability electronic components.

The SN74ALB16244DGGR belongs to TI's Widebus™ family-engineered specifically for high-speed, low-voltage bus interface applications demanding precise timing, noise resilience, and compact packaging in industrial and communications infrastructure.

FAQ

What is the maximum operating temperature range for the SN74ALB16244DGGR?

The SN74ALB16244DGGR is rated for operation from –40°C to +85°C ambient temperature, validated per TI's recommended operating conditions. This range supports deployment in industrial control cabinets, outdoor telecom enclosures, and automotive under-hood auxiliary modules where thermal cycling and extended temperature stability are required. The device's ALB BiCMOS process maintains consistent t_pd and output drive across this full range.

Does the SN74ALB16244DGGR support 5-V tolerant inputs?

The SN74ALB16244DGGR does not specify 5-V tolerant inputs in its datasheet. Inputs are designed for 3.3-V LVTTL logic levels, with absolute maximum input voltage limited to V_CC + 0.5 V (i.e., ≤4.1 V at V_CC = 3.6 V). While Schottky clamps protect against brief overshoot, sustained 5-V signals may exceed VI limits and risk reliability degradation. For mixed-voltage systems, level-shifting circuitry or a 5-V tolerant alternative like SN74AVC16T245 should be used.

How many independent output-enable controls does the SN74ALB16244DGGR provide?

The SN74ALB16244DGGR provides four independent active-low output-enable inputs (1OE through 4OE), each controlling a separate 4-bit buffer section. This allows granular control-for example, enabling only the upper 8 bits for address transfer while holding lower 8 bits in high-impedance during data phase. Pin mapping confirms OE signals occupy pins 1, 24, 25, and 48 in the TSSOP-48 package, physically isolated to minimize crosstalk.

What is the typical supply current per buffer section in the SN74ALB16244DGGR?

The typical supply current per buffer section in the SN74ALB16244DGGR is 3.7 mA at V_CC = 3.6 V, with a maximum of 5.6 mA under worst-case conditions. This value (ICC/buffer) reflects quiescent draw with all inputs at V_CC or GND and outputs enabled. Total device ICC is therefore ~22.4 mA max under full 16-bit activity-significantly lower than equivalent bipolar buffers, enabling use in thermally constrained or power-sensitive designs.

Is the SN74ALB16244DGGR pin-compatible with other 16-bit buffers in TI's Widebus family?

Yes-the SN74ALB16244DGGR uses the industry-standard '16244 pinout, matching SN74LVC16244A, SN74LVCH16244A, and SN74ABT16244 in the same 48-pin TSSOP (DGG) package. Pin functions-including OE placement, input/output grouping, and distributed V_CC/GND-align exactly. However, electrical behavior differs: ALB offers faster t_pd and built-in clamps, while LVC variants offer lower ICC. Layout reuse is fully supported; only firmware timing parameters require revalidation.