Texas Instruments SN74ABT16541DGGR

Overview

SN74ABT16541 from Texas Instruments is a noninverting 16-bit buffer/driver with dual 3-state output-enable control per 8-bit section, operating at 4.5–5.5 V, delivering ±32 mA/±64 mA drive strength, and characterized for –40°C to 85°C industrial use in bus interface applications.

For engineers reviewing the SN74ABT16541 datasheet, SN74ABT16541 pinout, SN74ABT16541 application, or SN74ABT16541 equivalent, key selection factors include its high-drive 3-state outputs, flow-through pinout for PCB layout optimization, distributed V_CC/GND configuration for noise suppression, and EPIC-II^B BiCMOS process enabling low power dissipation with latch-up immunity >500 mA.

Technical Context

The SN74ABT16541 implements two independent 8-bit noninverting buffer sections, each requiring both OE1 and OE2 inputs low to enable Y outputs; either OE high forces that section's outputs into high-impedance state. Its flow-through architecture places inputs on one side and outputs on the opposite side of the 48-pin TSSOP (DGG) package.

Designed using Texas Instruments' EPIC-II^B BiCMOS process, it achieves low ground bounce (<0.8 V VOLP), fast propagation delays (t_PLH/t_PHL ≤ 3.4 ns at 5 V), and robust ESD/latch-up performance compliant with JEDEC JESD-17, with distributed power/ground pins minimizing high-speed switching noise.

Key Specifications

Pinout & Package

SN74ABT16541 is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP), designated DGG, with 0.5-mm pitch and 7.1-mm body width. The package features distributed V_CC and GND pins across both sides to suppress simultaneous switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16541, SN74LVC16245ADGGR offers lower power but lacks 5-V compatibility and latch-up hardening, while SN74ABT16244DGGR provides identical performance with inverted outputs-making it a true functional alternative where polarity is configurable in system design.

Availability

SN74ABT16541 is available at Aetrix Electronics and suitable for industrial control systems, telecommunications backplanes, PLC I/O expansion modules, and DSP memory interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74ABT16541 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 IC design and manufacturing.

The SN74ABT16541 belongs to TI's Widebus™ family of high-speed, high-drive bus interface devices, engineered specifically for noise-immune, high-density 5-V system interconnect in industrial and communications infrastructure.

FAQ

What is the recommended power-up sequence for SN74ABT16541 to ensure outputs remain in high-impedance state?

To guarantee high-impedance during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to V_CC through pullup resistors. TI specifies minimum resistor value based on driver sink capability; typical 4.7-kΩ resistors suffice for most 5-V systems. This prevents bus contention before system firmware initializes the OE controls. The SN74ABT16541 datasheet explicitly recommends this practice for safe power sequencing.

Does SN74ABT16541 support hot-swap or live-insertion into an active bus?

While SN74ABT16541 features robust input clamp current (–18 mA) and I_off leakage (±100 µA at V_CC = 0), it is not formally qualified for hot-swap operation. Its 5-V-only supply and lack of integrated bus-isolation circuitry mean external protection (e.g., series resistors, TVS diodes) is required. The SN74ABT16541 datasheet does not specify hot-swap timing or sequencing requirements, so system-level validation is mandatory.

Can SN74ABT16541 be used with 3.3-V logic inputs?

Yes - SN74ABT16541 accepts 3.3-V TTL-compatible inputs: V_IL ≤ 0.8 V and V_VIH ≥ 2.0 V at V_CC = 4.5–5.5 V, so 3.3-V logic high (≥2.4 V) meets VIH spec. However, outputs swing rail-to-rail at 5 V, so level translation is needed if driving 3.3-V inputs. The SN74ABT16541 electrical characteristics table confirms valid operation with mixed-voltage signaling on the input side only.

What is the maximum capacitive load SN74ABT16541 can drive while maintaining specified timing?

TI characterizes SN74ABT16541 switching parameters at C_L = 50 pF, and propagation delays increase linearly beyond that. For reliable timing compliance, total load (including trace, stub, and input capacitance) should not exceed 75 pF. At 100 pF, t_PLH degrades by ~40% versus datasheet values. The SN74ABT16541 datasheet Figure 1 load circuit and note A confirm CL includes probe/jig capacitance - design margins must account for PCB parasitics.

How does the distributed V_CC/GND pin arrangement in SN74ABT16541 improve noise performance?

The SN74ABT16541 places four V_CC and eight GND pins across the 48-pin DGG package to minimize simultaneous switching output (SSO) noise. This reduces ground bounce (VOLP < 0.8 V) and supply droop by shortening current return paths and lowering inductance per pin pair. The distributed layout is validated in TI's EPIC-II^B design methodology and directly referenced in the SN74ABT16541 datasheet Section 3–1 as a key noise-suppression feature.