Texas Instruments SN74ABT16541ADGVR

Overview

SN74ABT16541ADGVR 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 IOH and 64 mA IOL drive strength, and characterized for –40°C to 85°C industrial temperature range in a 48-pin TSSOP (DGG) package. It serves as a high-drive bus interface in backplane and memory subsystem applications.

For engineers reviewing the SN74ABT16541ADGVR datasheet, SN74ABT16541ADGVR pinout, SN74ABT16541ADGVR application, or SN74ABT16541ADGVR equivalent, key selection criteria include its dual independent OE control architecture, flow-through pinout for PCB layout optimization, latch-up immunity >500 mA, and low ground bounce (<0.8 V VOLP at 5 V).

Technical Context

This device implements two independent 8-bit noninverting buffer sections, each requiring both OE1 and OE2 inputs low to enable outputs - a dual-active-low enable logic that prevents partial bus activation. Its EPIC-II^B BiCMOS process enables high-speed switching while minimizing power dissipation versus standard bipolar TTL.

The distributed V_CC/GND pin configuration reduces simultaneous switching noise, and the flow-through architecture aligns inputs on one side and outputs on the opposite side to simplify layer routing. Output drive capability (–32 mA/64 mA) supports driving heavily loaded buses without external buffers.

Key Specifications

Pinout & Package

SN74ABT16541ADGVR is packaged in a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 12.6 mm × 6.2 mm × 1.2 mm max height, with 0.5-mm pitch and Q1 pin-1 orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16541ADGVR, SN74ABT162244ADGGR offers modular scalability at the cost of additional board area and routing complexity, while SN74LVC16244ADGGR trades 5-V compatibility and robustness for lower voltage operation and reduced static power - neither is pin-compatible, but both serve adjacent system-level buffering needs.

Availability

SN74ABT16541ADGVR is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and backplane interconnect applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74ABT16541ADGVR 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 decades of heritage in high-reliability interface ICs.

The SN74ABT16541A belongs to TI's Widebus™ family of high-speed, high-drive bus interface devices, engineered specifically for robust 5-V parallel bus applications in industrial, telecom, and computing infrastructure.

FAQ

What is the recommended power-up sequence for SN74ABT16541ADGVR 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 via pullup resistors. TI specifies minimum resistor value based on driver sink capability; a 10-kΩ resistor is typical. This prevents bus contention before the system controller asserts valid OE states. The SN74ABT16541ADGVR itself has no internal power-on reset, so external OE control is mandatory for safe initialization.

Does SN74ABT16541ADGVR support mixed-voltage interfacing, such as 5-V inputs driving a 3.3-V system?

No - SN74ABT16541ADGVR is a 5-V-only device with V_CC range 4.5–5.5 V and input thresholds referenced to 5 V (V_IL = 0.8 V, V_IH = 2 V). Its outputs swing rail-to-rail within 5-V margins and are not 3.3-V tolerant. Direct connection to 3.3-V logic may damage inputs or violate VOH/VOL specs. Use level translators like SN74AVC4T245 if interfacing with 3.3-V systems.

Can SN74ABT16541ADGVR drive a 50-Ω transmission line directly without series termination?

Yes - with 64-mA IOL and –32-mA IOH, SN74ABT16541ADGVR can source/sink sufficient current to drive unterminated 50-Ω lines over short distances (<10 cm) while maintaining monotonic edges. For longer traces or strict EMI limits, TI recommends adding 22–33 Ω series resistors near the driver output. The device's low ground bounce (<0.8 V) helps preserve signal integrity even under heavy capacitive loading.

What is the thermal performance of SN74ABT16541ADGVR in the DGG package under full 16-bit switching?

In the DGG (TSSOP-48) package, SN74ABT16541ADGVR has a junction-to-ambient thermal resistance (θ_JA) of 89°C/W. Under worst-case conditions - all 16 outputs switching at 50% duty cycle into 50-pF loads at 5 V - power dissipation peaks near 34 mA × 5 V ≈ 170 mW. This yields ~15°C junction-to-ambient rise, well within the –40°C to +85°C operating range without heatsinking, assuming standard 2-oz copper PCB layout.

Is SN74ABT16541ADGVR pin-compatible with older 74-series buffers like 74F244 or 74AS244?

No - SN74ABT16541ADGVR uses a 48-pin TSSOP (DGG) package with flow-through pinout (inputs on left, outputs on right), whereas 74F244/74AS244 are 20-pin DIP/SOIC devices with interleaved I/O. While logic function (noninverting 3-state buffer) is similar, physical layout, pin count, and enable structure differ fundamentally. Migration requires PCB redesign; however, SN74ABT16541ADGVR replaces multiple 74-series chips with superior drive and noise performance.