Texas Instruments SN74LV541ATDBR

Overview

SN74LV541ATDBR from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for 4.5-V to 5.5-V V_CC operation. It features TTL-voltage-compatible inputs, typical propagation delay of 4 ns at 5 V, and supports mixed-mode voltage translation (e.g., 3.3-V input to 5-V output). It is used in memory address buffering and bus line driving applications.

For engineers reviewing the SN74LV541ATDBR datasheet, SN74LV541ATDBR pinout, SN74LV541ATDBR application, or SN74LV541ATDBR equivalent, key selection considerations include its dual active-low 3-state enable (OE1/OE2), I_off partial-power-down support, ±16 mA output drive, and SSOP-20 package thermal performance (θ_JA = 70°C/W).

Technical Context

The SN74LV541ATDBR implements eight independent noninverting buffers, each with a two-input AND gate control logic for 3-state output enable-OE1 and OE2 are both active-low, so either high disables all corresponding outputs. Its input structure accepts TTL-level signals (V_IL ≤ 0.8 V, V_IH ≥ 2 V) across the full 4.5–5.5 V supply range.

It integrates I_off circuitry to disable outputs during partial power-down, preventing backflow current when V_CC = 0 V. Output ground bounce (V_OLP) and undershoot (V_OHV) are specified at <0.8 V and >2.3 V respectively at V_CC = 5 V, TA = 25°C, ensuring signal integrity in high-speed bus environments.

Key Specifications

Pinout & Package

SN74LV541ATDBR is packaged in a 20-pin SSOP (Shrink Small Outline Package), DB suffix, with 0.65-mm lead pitch and 2.0-mm max height. The package exposes no thermal pad and uses gull-wing leads compatible with standard reflow profiles (MSL Level-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV541ATDBR, SN74LVC541APWR offers better speed in low-voltage domains but forfeits 5-V interoperability, while 74ACT541SCX delivers higher performance without I_off safety-making SN74LV541ATDBR the optimal choice for robust, mixed-voltage, power-aware designs.

Availability

SN74LV541ATDBR is available at Aetrix Electronics and suitable for memory subsystems, industrial bus interfaces, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV541ATDBR 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 SN74LV541ATDBR belongs to TI's LV-A family of low-voltage, TTL-compatible logic devices, engineered for robust mixed-signal interfacing in industrial, automotive, and communications infrastructure applications.

FAQ

What is the function of OE1 and OE2 on the SN74LV541ATDBR?

The SN74LV541ATDBR uses two active-low output-enable inputs-OE1 and OE2-connected to a two-input AND gate controlling all eight outputs. If either OE1 or OE2 is high, all Y1–Y8 outputs enter high-impedance state. Both must be low for normal noninverting data transfer from A1–A8 to Y1–Y8. This dual-enable architecture allows flexible bus partitioning in multi-master systems.

Does the SN74LV541ATDBR support partial-power-down operation?

Yes, the SN74LV541ATDBR includes I_off circuitry that disables outputs and limits leakage to ≤5 μA when V_CC = 0 V, even if input or output voltages range from 0 to 5.5 V. This feature protects downstream circuitry during power sequencing, hot-swap events, or standby modes-critical in multi-rail industrial and automotive systems where SN74LV541ATDBR is deployed.

Can the SN74LV541ATDBR translate 3.3-V logic to 5-V levels?

Yes, the SN74LV541ATDBR accepts 3.3-V TTL-compatible inputs (V_IH ≥ 2 V, V_IL ≤ 0.8 V) while operating at 5-V V_CC, producing valid 5-V CMOS output levels (V_OH ≥ 3.8 V, V_OL ≤ 0.55 V at 16 mA). This makes SN74LV541ATDBR ideal for bridging 3.3-V controllers to legacy 5-V peripherals without external level shifters.

What is the maximum recommended load capacitance for SN74LV541ATDBR outputs?

The SN74LV541ATDBR is characterized for CL = 15 pF and CL = 50 pF in its switching specifications. At CL = 50 pF and V_CC = 5 V, t_pd increases to 5.5–10 ns depending on condition. For reliable timing closure in high-speed designs, keep total load (including trace, probe, and input capacitance) ≤50 pF. Exceeding this may degrade edge rates and increase propagation skew across the SN74LV541ATDBR's eight channels.

Is the SN74LV541ATDBR pin-compatible with other octal buffers in the same package?

SN74LV541ATDBR shares the same 20-pin SSOP (DB) footprint and pinout with industry-standard octal buffers including SN74LS541N and SN74HC541N. However, electrical behavior differs: SN74LV541ATDBR offers I_off, wider V_CC, and TTL-compatible inputs-so direct substitution requires verification of enable logic polarity, drive strength, and power sequencing. Always validate timing and DC specs before drop-in replacement.