Texas Instruments SN74LVTH16541DLR

Overview

SN74LVTH16541DLR from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It features dual 8-bit sections with independent output-enable controls (1OE1/1OE2 and 2OE1/2OE2), bus-hold on all data inputs, Ioff support for hot insertion, and operates from –40°C to 85°C with supply voltage range 2.7 V to 3.6 V.

For engineers reviewing the SN74LVTH16541DLR datasheet, SN74LVTH16541DLR pinout, SN74LVTH16541DLR application, or SN74LVTH16541DLR equivalent, key selection considerations include its 48-pin SSOP (DL) package, ±64 mA low-level output drive, 3.8 ns typical propagation delay at 3.3 V, bus-hold functionality eliminating external resistors, and compliance with JESD 17 latch-up and MIL-STD-883 ESD standards.

Technical Context

This device implements Advanced BiCMOS Technology (ABT) for low static power and high-speed operation at 3.3 V while tolerating 5-V input signals. Its dual 8-bit architecture enables independent control of two buffered data buses via four OE inputs - each 8-bit section requires both OE pins low to enable outputs.

The integrated bus-hold circuitry maintains valid logic levels on floating inputs without external components, and Ioff protection disables outputs during power-down to prevent backflow current. Power-up 3-state ensures outputs remain high-impedance until VCC exceeds 1.5 V, avoiding bus contention during sequencing.

Key Specifications

Pinout & Package

SN74LVTH16541DLR is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm × 1.95 mm body size, with 0.5-mm lead pitch and gull-wing leads. The package supports fine-pitch PCB layout and conforms to JEDEC MO-153.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and SN74ALVCH162244DGGR, SN74LVTH16541DLR uniquely combines 5-V input tolerance, bus-hold, Ioff, and industrial temperature range - making it the only option among the three qualified for mixed-voltage, hot-pluggable, and floating-input industrial applications.

Availability

SN74LVTH16541DLR is available at Aetrix Electronics and suitable for industrial automation, telecom backplane expansion, and embedded memory interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74LVTH16541DLR 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 connectivity technologies, with decades of experience in high-reliability logic and interface solutions.

The SN74LVTH16541DLR belongs to TI's Widebus™ family of advanced 3.3-V ABT logic devices, engineered specifically for robust mixed-signal interfacing, hot-swap capability, and noise-immune operation in industrial and communications infrastructure.

FAQ

What is the operating voltage range for SN74LVTH16541DLR?

The SN74LVTH16541DLR operates from 2.7 V to 3.6 V on VCC. It supports unregulated battery operation down to 2.7 V and maintains full functionality across this range. Input voltage tolerance extends to 5.5 V, enabling reliable interfacing with 5-V TTL systems while powered from 3.3 V - a key feature confirmed in the recommended operating conditions table of the official datasheet.

Does SN74LVTH16541DLR support hot insertion?

Yes, SN74LVTH16541DLR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.5 V. These capabilities are explicitly documented in the device description and functional specifications, meeting requirements for live module replacement in telecom and industrial backplanes.

How many output-enable inputs does SN74LVTH16541DLR have, and how do they work?

SN74LVTH16541DLR has four active-low output-enable inputs: 1OE1 and 1OE2 control the first 8-bit section (1Y1–1Y8), while 2OE1 and 2OE2 control the second (2Y1–2Y8). Both OE inputs per section must be low to enable outputs; if either is high, that section's outputs go high-impedance. This dual-OE architecture is clearly shown in the function table and logic diagram of the datasheet.

What package type is SN74LVTH16541DLR supplied in, and what are its key mechanical dimensions?

SN74LVTH16541DLR is supplied in a 48-pin SSOP package (DL), measuring 12.6 mm × 6.2 mm × 1.95 mm with 0.5-mm lead pitch. The package conforms to JEDEC MO-153 and features gull-wing leads, five GND pins, and four VCC pins for optimal noise suppression - details verified in TI's official package outline drawing DGG0048A and packaging addendum.

Does SN74LVTH16541DLR include bus-hold circuitry, and what is its benefit?

Yes, SN74LVTH16541DLR includes active bus-hold on all data inputs (1A1–1A8 and 2A1–2A8), with a maximum dynamic hold current of ±750 µA. This eliminates the need for external pullup or pulldown resistors on unused or unterminated inputs, reducing BOM cost, PCB space, and design risk - a feature explicitly highlighted in the datasheet's features and electrical characteristics sections.