Texas Instruments SN74LV541ATDGVR

Overview

SN74LV541ATDGVR from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for 4.5-V to 5.5-V VCC operation. It features TTL-voltage-compatible inputs, typical propagation delay of 4 ns at 5 V, and supports mixed-mode voltage translation from 3.3 V to 5 V. It is used to drive bus lines or buffer memory address registers in industrial control and embedded systems.

For engineers reviewing the SN74LV541ATDGVR datasheet, SN74LV541ATDGVR pinout, SN74LV541ATDGVR application, or SN74LV541ATDGVR equivalent, key selection criteria include 3-state output control via dual active-low OE inputs, Ioff partial-power-down support, output ground bounce (VOLP) <0.8 V, and thermal performance in TVSOP-20 package.

Technical Context

The SN74LV541ATDGVR implements eight independent noninverting buffers, each with a two-input AND gate for 3-state control (OE1 and OE2 active-low). Outputs enter high-impedance state if either OE input is high, enabling flexible bus isolation. Input logic thresholds are TTL-compatible (VIH = 2 V, VIL = 0.8 V), allowing interoperability with bipolar and 3.3-V logic families.

It incorporates Ioff circuitry to disable outputs during partial power-down, preventing damaging current backflow when VCC = 0. Absolute maximum ratings permit VI and VO up to 7 V, and it meets JESD 17 latch-up (>250 mA) and JESD 22 ESD standards (2000-V HBM, 200-V MM, 1000-V CDM).

Key Specifications

Pinout & Package

SN74LV541ATDGVR is housed in a 20-pin TVSOP (Thin Very Small Outline Package) with 0.5-mm pitch, 3.5 mm × 4.4 mm body, and 1.2-mm max height. The exposed thermal pad (Pin 21) must be soldered to PCB for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SN74LV541ATDGVR, SN74LVC541APWR offers lower voltage operation but cannot replace it in 5-V systems, while 74ACT541SCX delivers higher speed and drive but sacrifices Ioff safety and mixed-voltage flexibility.

Availability

SN74LV541ATDGVR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy interface adaptation requiring stable component supply, long-term lifecycle support, and RoHS-compliant TVSOP packaging.

Supply support for SN74LV541ATDGVR 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 industrial-grade logic and interface solutions.

The SN74LV541ATDGVR belongs to TI's LV family of low-voltage, high-speed logic devices engineered for robust 5-V bus interfacing, mixed-supply translation, and reliable operation in harsh industrial and automotive environments.

FAQ

What is the recommended pull-up resistor value for OE pins on SN74LV541ATDGVR during power-up?

TI recommends tying OE1 and OE2 to VCC through a pullup resistor to ensure high-impedance state at power-up. The minimum resistor value depends on the current-sinking capability of the driving source; for standard CMOS drivers, 10 kΩ is commonly used and provides sufficient noise margin while limiting quiescent current. Always verify against the specific controller's output low voltage and sink current specs in your design.

Does SN74LV541ATDGVR support hot-swap operation?

Yes, SN74LV541ATDGVR supports partial-power-down operation via its Ioff feature. When VCC = 0 V, the Ioff circuitry disables all outputs, limiting reverse current to ≤5 μA even if inputs or outputs are biased to 5.5 V. This prevents damage during live insertion into powered backplanes - a key requirement for hot-swap-capable industrial and telecom systems.

Can SN74LV541ATDGVR drive a 50-pF load with guaranteed timing at 125°C?

Yes. Per the datasheet's SWITCHING CHARACTERISTICS table, SN74LV541ATDGVR guarantees tpd ≤ 9 ns and tdis ≤ 14 ns at CL = 50 pF, VCC = 5 V, and TA = –40°C to 125°C. These values include worst-case process, voltage, and temperature corners, ensuring timing compliance in extended-temperature industrial deployments.

Is the thermal pad (Pin 21) on SN74LV541ATDGVR electrically connected internally?

No - the exposed thermal pad (Pin 21) on SN74LV541ATDGVR is not electrically connected to any internal circuit node. It is a dedicated mechanical and thermal interface that must be soldered to a PCB copper pour for effective heat dissipation. TI recommends connecting it to GND for EMI reduction, but electrical connection is optional and does not affect device functionality.

How does the dual OE architecture of SN74LV541ATDGVR improve system-level bus management?

The dual active-low OE inputs (OE1 and OE2) implement an AND logic function: both must be low for outputs to drive. This enables hierarchical control - e.g., OE1 tied to system-level bus enable and OE2 to local module reset - allowing fine-grained isolation without additional logic gates. It simplifies PCB routing by eliminating need for external AND gates in multi-module bus architectures.