Texas Instruments SN74AHC16541DGVR

Overview

SN74AHC16541DGVR from Texas Instruments is a noninverting 16-bit buffer/driver with dual 3-state output-enable control per 8-bit section, operating from 2 V to 5.5 V, featuring 48-pin TVSOP (DGV) package, ±8 mA output drive at 5 V, and propagation delays as low as 3.5 ns (tPLH/tPHL, VCC = 5 V, CL = 15 pF). It enables high-density bus interfacing in industrial control backplanes.

For engineers reviewing the SN74AHC16541DGVR datasheet, SN74AHC16541DGVR pinout, SN74AHC16541DGVR application, or SN74AHC16541DGVR equivalent, key selection criteria include its dual independent OE control per octet, flow-through pinout for PCB layout optimization, distributed VCC/GND pins for noise suppression, and guaranteed operation across –40°C to 85°C.

Technical Context

The SN74AHC16541DGVR implements two independent 8-bit noninverting buffer sections, each with two active-low output-enable inputs (e.g., 1OE1 and 1OE2); both must be low for that section's Y outputs to drive - otherwise, outputs enter high-impedance state. Its EPIC™ CMOS process ensures latch-up immunity >250 mA per JESD 17.

Designed for high-speed digital systems, it uses distributed power/ground pins to minimize simultaneous switching noise, and its flow-through architecture aligns inputs on one side and outputs on the opposite side - reducing trace crossovers and layer count in dense PCB layouts.

Key Specifications

Pinout & Package

SN74AHC16541DGVR uses a 48-pin Thin Very Small-Outline Package (TVSOP, DGV), 3.6 mm × 12.5 mm body, 0.4 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with exposed pad not present. Pin 1 located in Q1 quadrant of tape reel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCH16541DGGR and 74ALVC16541MTD, the SN74AHC16541DGVR uniquely supports 5 V operation with flow-through routing and distributed power pins - making it the only choice for mixed-voltage industrial backplanes requiring layout efficiency and noise resilience.

Availability

SN74AHC16541DGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, automated test equipment signal routing, programmable logic controller I/O modules, medical imaging data acquisition boards, and high-reliability embedded control systems requiring stable component supply across extended temperature ranges.

Supply support for SN74AHC16541DGVR 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 and widebus architectures.

The SN74AHC16541DGVR belongs to TI's AHC logic family - engineered for high-speed, low-noise bus interfacing in industrial, automotive, and communications infrastructure where signal integrity, thermal stability, and layout efficiency are critical.

FAQ

What is the recommended power-up sequence for SN74AHC16541DGVR to ensure outputs remain in high-impedance state?

To guarantee high-impedance during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to VCC via pullup resistors. The minimum resistor value depends on the driver's current-sinking capability - typically 10 kΩ suffices for most microcontroller-driven OE lines. This prevents bus contention before firmware initializes the enables. The SN74AHC16541DGVR itself has no internal power-on reset; external biasing is mandatory.

Does SN74AHC16541DGVR support 5 V logic levels when powered at 3.3 V?

No. When powered at VCC = 3.3 V, the SN74AHC16541DGVR accepts input voltages up to 3.3 V and drives outputs within 0–3.3 V. Its inputs are not 5 V tolerant - applying 5 V to any input (including OE) while VCC = 3.3 V violates absolute maximum ratings and risks damage. For 5 V-tolerant operation, VCC must be ≥4.5 V per datasheet recommendations.

How does the flow-through architecture of SN74AHC16541DGVR improve PCB layout compared to traditional dual-in-line buffers?

The SN74AHC16541DGVR places all 16 inputs on the left edge (Pins 1–24) and all 16 outputs on the right edge (Pins 25–48), enabling straight-through trace routing without layer changes or vias. In contrast, conventional packages interleave I/O, forcing complex fanout, stubs, and impedance discontinuities. This flow-through design reduces signal path length by ~35% and eliminates crosstalk-inducing bends - directly improving timing margin and EMI performance in dense layouts.

Can SN74AHC16541DGVR drive a 50 pF load at 50 MHz without signal degradation?

Yes. With tPLH/tPHL = 5 ns and tPZH/tPZL = 6.2 ns (VCC = 5 V, CL = 50 pF), the SN74AHC16541DGVR supports clean 50 MHz clocked data transfer (20 ns period). Its ±8 mA drive strength ensures <1 V undershoot/overshoot into 50 pF + 50 Ω line, and distributed VCC/GND pins suppress simultaneous switching noise. For optimal results, use local 100 nF ceramic decoupling per VCC pin and maintain controlled-impedance routing.

What is the thermal derating behavior of SN74AHC16541DGVR above 70°C ambient?

With θJA = 58°C/W, the SN74AHC16541DGVR junction temperature rises ~3.5°C per mW of dissipation. At 85°C ambient and typical ICC = 40 µA (static) + dynamic contribution, total power remains <15 mW - keeping TJ < 95°C. No derating is required up to 85°C. However, sustained 8 mA output switching at 50 MHz increases dynamic power; in such cases, reduce output load capacitance or add 1–2 cm² of 2-oz copper pour under the DGV package to lower effective θJA by ~15°C/W.