Texas Instruments SN74LV125ADGVR

Overview

SN74LV125ADGVR from Texas Instruments is a quadruple 3-state bus buffer gate designed for level-shifting and bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers ≤6 ns propagation delay at 5 V, supports 5.5-V-tolerant inputs, features I_off partial-power-down protection, and is packaged in a 14-pin TVSOP (DGV) measuring 3.60 mm × 4.40 mm - used in enterprise SSDs and PoE power management circuits.

For engineers reviewing the SN74LV125ADGVR datasheet, SN74LV125ADGVR pinout, SN74LV125ADGVR application, or SN74LV125ADGVR equivalent, key selection criteria include its 3-state output control timing (t_en/t_dis), V_CC-scalable drive strength (±16 mA at 5 V), ground-bounce immunity (<0.8 V VOLP), and compatibility with 3.3 V/5 V mixed-signal bus interfaces.

Technical Context

The SN74LV125ADGVR implements four independent non-inverting buffers, each with an active-low 3-state output enable (OE). Its CMOS design enables bidirectional voltage translation: inputs tolerate up to 5.5 V regardless of V_CC, allowing down-translation from 5 V logic to 3.3 V or 2.5 V domains while maintaining rail-to-rail output swing.

Each buffer exhibits matched rise/fall times (Δt/Δv ≥20 ns/V at 5 V), low dynamic noise (VOLP <0.8 V, VOHV >2.3 V at 3.3 V), and latch-up immunity (>250 mA per JESD17). The I_off feature disables current flow when V_CC = 0, enabling live insertion and back-drive protection in hot-swap applications.

Key Specifications

Pinout & Package

SN74LV125ADGVR uses a 14-pin Thin Very Small Outline Package (TVSOP, DGV) with 0.5 mm pitch, body size 3.60 mm × 4.40 mm, and exposed pad not present. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV125ADGVR, SN74LVC125APW offers better speed in low-voltage systems but sacrifices 5 V input compatibility, while 74LVX125M matches pinout and basic function but lacks extended temperature rating and I_off - making SN74LV125ADGVR the sole choice for ruggedized, mixed-voltage, hot-swap-capable designs.

Availability

SN74LV125ADGVR is available at Aetrix Electronics and suitable for enterprise SSDs, Power over Ethernet endpoints, and programmable logic controller I/O modules requiring stable component supply across automotive-qualified, industrial, and extended-temperature production programs.

Supply support for SN74LV125ADGVR 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 expertise in logic IC design and industrial-grade reliability validation.

The SN74LV125A product line delivers robust, wide-supply-range bus buffers for voltage translation and isolation in harsh-environment applications including motor control, industrial automation, and infrastructure networking equipment.

FAQ

What is the maximum operating temperature for SN74LV125ADGVR?

The SN74LV125ADGVR is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per TI's recommended operating conditions and thermal metrics (RθJA = 127.6°C/W for DGV package), making it suitable for deployment in sealed motor drive enclosures and outdoor PoE-powered devices where thermal management is constrained.

Does SN74LV125ADGVR support 5 V input signals when powered from 3.3 V?

Yes, SN74LV125ADGVR supports 5.5-V-tolerant inputs across its full V_CC range (2 V to 5.5 V). When powered from 3.3 V, it safely accepts 5 V logic levels on all A-input pins without damage or clamping, enabling seamless down-translation in mixed-voltage systems such as SSD host interfaces connecting 5 V controllers to 3.3 V flash memory buses.

What is the purpose of the I_off feature in SN74LV125ADGVR?

The I_off feature in SN74LV125ADGVR disables current flow through the device when V_CC = 0 V, preventing back-driving and leakage between powered and unpowered circuit sections. This enables safe live insertion of daughterboards and hot-swap capability in modular systems - a critical requirement in enterprise storage and industrial backplane architectures where SN74LV125ADGVR is commonly deployed.

Can SN74LV125ADGVR replace SN74LV125ADR in a PCB layout?

No, SN74LV125ADGVR cannot directly replace SN74LV125ADR without board modification. Although both share identical pin functions and logic behavior, SN74LV125ADGVR uses a 14-pin TVSOP (DGV) package (3.60 mm × 4.40 mm), while SN74LV125ADR uses a wider SOIC (D) package (8.65 mm × 3.90 mm). Footprint and solder reflow profiles differ significantly, requiring layout revision and requalification.

What decoupling capacitance is recommended for SN74LV125ADGVR?

Texas Instruments recommends a 0.1 µF ceramic bypass capacitor placed as close as possible to the V_CC pin (Pin 14) of SN74LV125ADGVR. For systems with multiple power domains or high-noise environments, paralleling a 1 µF capacitor improves low-frequency suppression. The TVSOP package's compact size demands short trace lengths (<2 mm) between capacitor and V_CC/GND pins to maintain effective high-frequency noise filtering.