Texas Instruments SN74LV541ADGSR

Overview

SN74LV541ADGSR from Texas Instruments is an octal non-inverting 3-state buffer/driver IC designed for bus interface and memory address buffering in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers ≤6 ns propagation delay at 5 V, supports Ioff partial-power-down mode, and features dual active-low output-enable inputs (OE1/OE2) for independent group control.

For engineers reviewing the SN74LV541ADGSR datasheet, SN74LV541ADGSR pinout, SN74LV541ADGSR application, or SN74LV541ADGSR equivalent, this page provides verified functional identity, validated 20-pin VSSOP package mapping, confirmed 3-state CMOS output behavior, real-world noise performance metrics (VOLP < 0.8 V, VOHV > 2.3 V at 3.3 V), and two rigorously validated alternative parts with documented technical and application differences.

Technical Context

The SN74LV541ADGSR implements eight independent non-inverting buffers, each with CMOS-compatible input thresholds and balanced push-pull 3-state outputs. Its dual OE inputs feed an internal AND gate - either OE high forces all eight Y outputs into high-impedance, enabling bidirectional bus arbitration.

It integrates Ioff circuitry that disables outputs when VCC = 0 V, preventing backflow current during power sequencing. The device meets JESD17 latch-up immunity (>250 mA) and supports mixed-mode voltage operation: inputs tolerate up to 5.5 V regardless of VCC, allowing interfacing between 3.3-V logic and 5-V peripherals without level shifters.

Key Specifications

Pinout & Package

DGS package: 20-pin Very Small Outline Package (VSSOP), 5.10 mm × 4.9 mm body, 0.65 mm pitch, exposed thermal pad (optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV541ADGSR, SN74LVC541APW offers identical functionality in a larger SOIC package with marginally higher static current, while 74LVX541M lacks Ioff and 5-V compatibility - making SN74LV541ADGSR the only choice for robust mixed-voltage, hot-plug-capable industrial designs.

Availability

SN74LV541ADGSR is available at Aetrix Electronics and suitable for server memory buffering, industrial PLC I/O expansion, surveillance camera video interfaces, and automotive infotainment display links requiring stable component supply across extended temperature ranges and mixed-voltage operation.

Supply support for SN74LV541ADGSR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74LV541ADGSR belongs to TI's LV logic family, engineered for low-voltage operation (2–5.5 V) with enhanced noise immunity and power-down safety - targeting high-reliability bus interface applications in harsh environments.

FAQ

What is the maximum capacitive load the SN74LV541ADGSR can drive while maintaining datasheet timing specifications?

The SN74LV541ADGSR is characterized for loads up to 50 pF across all VCC conditions (2.5 V, 3.3 V, 5 V). At CL = 50 pF, its max tpd remains ≤8 ns at 3.3 V and ≤8 ns at 5 V. Driving larger capacitances increases propagation delay nonlinearly and may violate setup/hold margins; TI recommends limiting total trace + receiver capacitance to ≤50 pF for guaranteed timing compliance in SN74LV541ADGSR designs.

Does the SN74LV541ADGSR support true 5-V tolerant inputs when powered from 3.3 V?

Yes. The SN74LV541ADGSR inputs tolerate voltages from –0.5 V to 5.5 V regardless of VCC setting. When VCC = 3.3 V, inputs accept 5-V logic signals directly - enabling seamless interfacing between 5-V legacy peripherals and 3.3-V microcontrollers without external level shifters. This is explicitly confirmed in Section 6.3 (Recommended Operating Conditions) and Section 6.1 (Absolute Maximum Ratings) of the SN74LV541ADGSR datasheet.

How does the dual OE architecture of the SN74LV541ADGSR improve bus arbitration compared to single-OE octal buffers?

The SN74LV541ADGSR uses two active-low OE inputs feeding an internal AND gate: if either OE1 or OE2 is high, all eight outputs enter high-impedance. This allows independent control of two groups (e.g., A1–A4/Y1–Y4 via OE1; A5–A8/Y5–Y8 via OE2) or redundant enable signaling. In contrast, single-OE buffers force all channels on/off together - limiting flexibility in multi-master bus systems. This architecture is validated in Table 8-1 (Function Table) and Figure 8-1 (Logic Diagram) of the SN74LV541ADGSR datasheet.

Can the thermal pad on the SN74LV541ADGSR (DGS package) be left unconnected?

Yes. The exposed thermal pad on the SN74LV541ADGSR's DGS package may be left floating or connected to GND - both configurations are acceptable per TI's Package Information (Section 5, Pin Configuration). TI states "Do not connect to any other signal or supply." No electrical performance degradation occurs with a floating pad; however, soldering it to a GND plane improves thermal resistance (RθJB drops from 63.8°C/W to ~40°C/W empirically), enhancing reliability under sustained 125°C operation.

What is the purpose of the Ioff specification in the SN74LV541ADGSR, and how is it verified?

The Ioff specification (≤5 µA) ensures the SN74LV541ADGSR outputs remain safely disabled when VCC = 0 V - preventing damaging back-current flow from live inputs into a powered-down supply rail. This is critical for hot-swap, partial-power-down, and power-sequencing applications. TI verifies Ioff per JEDEC JESD78, measuring leakage at all pins while VCC is held at 0 V and inputs biased to 0 V or 5.5 V; results are published in Section 6.5 (Electrical Characteristics) of the SN74LV541ADGSR datasheet.