Texas Instruments SN74LV125ADRE4

Overview

SN74LV125ADRE4 from Texas Instruments is a quadruple 3-state bus buffer gate designed for level-translating, bidirectional bus isolation in mixed-voltage systems. It operates from 2 V to 5.5 V, delivers ≤5.5 ns propagation delay at 5 V, supports Ioff partial-power-down mode, and features 5.5-V-tolerant inputs - enabling reliable interfacing between 3.3-V logic and 5-V peripherals in industrial SSDs and PoE controllers.

For engineers reviewing the SN74LV125ADRE4 datasheet, SN74LV125ADRE4 pinout, SN74LV125ADRE4 application, or SN74LV125ADRE4 equivalent, this page provides verified functional identity, SOIC-14 package mapping, confirmed 3-state timing specs (tpd, ten, tdis), Ioff behavior under power-down, and two validated alternative parts with documented functional and application differences.

Technical Context

The SN74LV125ADRE4 implements four independent noninverting buffers, each with an active-low 3-state output enable (OE). Its CMOS design ensures rail-to-rail output swing and input voltage tolerance up to 5.5 V regardless of VCC - allowing down-translation from higher-voltage buses without external level shifters. The device uses standard positive-logic function tables and exhibits no internal latching or feedback paths.

Each buffer operates with matched drive strength (±8 mA at 3 V, ±16 mA at 4.5–5.5 V), low ground bounce (<0.8 V) and undershoot (>2.3 V) at 3.3 V, and guaranteed high-impedance state during power sequencing when OE is pulled high. Thermal resistance (RθJA = 89.2°C/W) and ESD robustness (4 kV HBM) are specified for the SOIC-14 (D) package.

Key Specifications

Pinout & Package

SN74LV125ADRE4 is packaged in a 14-pin SOIC (D) body measuring 8.65 mm × 3.90 mm, with standard 1.27-mm pitch and gull-wing leads. The package is RoHS-compliant, lead-finished with NiPdAu/Sn, and rated MSL-1 (unlimited floor life).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC125A and 74AHC125, the SN74LV125ADRE4 uniquely combines 5.5-V input tolerance, Ioff, and industrial temperature rating - making it the only choice for mixed-voltage, hot-pluggable, or extended-temperature bus isolation where reliability under power transients is mandatory.

Availability

SN74LV125ADRE4 is available at Aetrix Electronics and suitable for industrial automation, enterprise SSDs, and Power over Ethernet equipment requiring stable component supply across long production lifecycles.

Supply support for SN74LV125ADRE4 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision logic, power management, and signal chain technologies.

The SN74LV125ADRE4 belongs to TI's LV logic family, engineered specifically for low-voltage, mixed-rail industrial interfaces where voltage translation, power-down safety, and noise resilience are critical design requirements.

FAQ

What is the maximum propagation delay of the SN74LV125ADRE4 at 5 V?

The SN74LV125ADRE4 has a maximum propagation delay (tpd) of 5.5 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C. This value increases to 7.5 ns over the full –40°C to +125°C operating range. The SN74LV125ADRE4 maintains consistent timing performance across its entire voltage range, with tpd = 8 ns at 2.5 V and 11 ns at 3.3 V under identical load conditions.

Does the SN74LV125ADRE4 support partial-power-down mode?

Yes, the SN74LV125ADRE4 supports partial-power-down mode via its Ioff feature. When VCC = 0 V, the Ioff current is ≤5 µA, preventing current backflow between powered and unpowered system sections. This behavior is explicitly characterized in Section 6.5 of the datasheet and makes the SN74LV125ADRE4 suitable for hot-swap applications such as modular PLC I/O carriers and enterprise SSD backplanes.

Can the SN74LV125ADRE4 translate 5-V signals to a 3.3-V system?

Yes, the SN74LV125ADRE4 accepts input voltages up to 5.5 V regardless of VCC setting - enabling direct 5-V-to-3.3-V down-translation without external components. When VCC = 3.3 V, the SN74LV125ADRE4 outputs swing rail-to-rail (0 V to 3.3 V), and its inputs remain fully compatible with 5-V TTL and CMOS logic levels, as confirmed by VIH/VIL specifications in Section 6.3.

What package type is used for the SN74LV125ADRE4?

The SN74LV125ADRE4 uses a 14-pin SOIC (D) package with dimensions 8.65 mm × 3.90 mm and 1.27-mm lead pitch. It is RoHS-compliant, features NiPdAu/Sn lead finish, and carries MSL-1 rating (unlimited floor life). This package is distinct from TVSOP (DGV), SSOP (DB), or TSSOP (PW) variants - the "D" suffix in SN74LV125ADRE4 explicitly denotes SOIC.

Is the SN74LV125ADRE4 pin-compatible with other 74LV125 variants?

Yes, all SN74LV125x variants - including SN74LV125ADR, SN74LV125ADBR, and SN74LV125ADGVR - share identical pin configuration and logic function. The SN74LV125ADRE4 is electrically and mechanically interchangeable with other D-package versions (e.g., SN74LV125ADR), differing only in tape-and-reel packaging and shipping documentation per TI's orderable addendum.