Texas Instruments SN74LVC126ADGVRE4

Overview

SN74LVC126ADGVRE4 from Texas Instruments is a quadruple 3-state bus buffer gate operating from 1.65 V to 3.6 V, featuring 5.5 V-tolerant inputs, 4.7 ns max propagation delay at 3.3 V, and –40°C to +125°C temperature range. It serves as a level-translating buffer in mixed-voltage digital interfaces such as SSD controller buses and audio subsystem interconnects.

For engineers reviewing the SN74LVC126ADGVRE4 datasheet, SN74LVC126ADGVRE4 pinout, SN74LVC126ADGVRE4 application, or SN74LVC126ADGVRE4 equivalent, key selection criteria include 3-state output control timing (ten/tdis), input overvoltage tolerance, drive strength (±24 mA at 3 V), and thermal performance in TVSOP-14 packaging for high-density PCB layouts.

Technical Context

The SN74LVC126ADGVRE4 implements four independent non-inverting buffers, each with dedicated active-low output-enable (OE) control. Its CMOS design supports rail-to-rail output swing (VOL ≤ 0.8 V, VOH ≥ VCC – 0.3 V) and operates reliably across 1.65–3.6 V supply while accepting 0–5.5 V input signals - enabling down-translation from 5 V logic to 3.3 V or 1.8 V domains.

Each buffer exhibits matched rise/fall times (<1 ns/V input transition rate), low dynamic power (Cpd = 4 pF at 3.3 V, outputs enabled), and robust ESD protection (±2000 V HBM). The device enters high-impedance state when OE is low, with pulldown resistor guidance provided for safe power-up sequencing in systems lacking controlled reset.

Key Specifications

Pinout & Package

SN74LVC126ADGVRE4 uses the TVSOP-14 (DGV) package: 3.60 mm × 6.40 mm body size, 14-pin surface-mount, lead-free NiPdAu finish, moisture sensitivity level (MSL) 1, peak reflow 260°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC125ADGVRE4, the SN74LVC126ADGVRE4 offers native active-low OE control simplifying direct MCU GPIO connection; versus 74LVC126PW,118, it delivers faster timing and broader temperature validation critical for automotive and industrial SSD use cases.

Availability

SN74LVC126ADGVRE4 is available at Aetrix Electronics and suitable for SSD controller interfaces, audio subsystem isolation, industrial display timing control, and automotive infotainment data routing requiring stable component supply across extended temperature ranges.

Supply support for SN74LVC126ADGVRE4 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 logic solutions, with decades of expertise in high-reliability interface ICs.

The SN74LVC126A family was designed for robust, low-voltage bus buffering in mixed-signal systems - targeting applications demanding voltage translation, noise immunity, and extended temperature operation without external support circuitry.

FAQ

What is the maximum input voltage rating for SN74LVC126ADGVRE4?

The SN74LVC126ADGVRE4 supports input voltages from 0 V to 5.5 V, independent of VCC level. This allows direct interfacing with 5 V logic devices even when powered from 1.65 V to 3.6 V supplies - a key feature enabling voltage translation in mixed-domain systems without external components.

Does SN74LVC126ADGVRE4 require external pull-down resistors on OE pins?

Yes - to ensure outputs remain in high-impedance state during power-up or power-down, each OE pin of SN74LVC126ADGVRE4 must be tied to GND through a pulldown resistor. The minimum resistance value depends on the current-sourcing capability of the driving source, typically 10 kΩ for standard GPIOs.

What is the typical propagation delay of SN74LVC126ADGVRE4 at 3.3 V?

The typical propagation delay (tpd) of SN74LVC126ADGVRE4 is 2.5 ns at VCC = 3.3 V and TA = 25°C, with a maximum of 4.7 ns across –40°C to +125°C. This ensures reliable timing margins in high-speed digital interfaces such as SSD command buses and audio serial links.

Can SN74LVC126ADGVRE4 drive multiple LVC inputs simultaneously?

Yes - SN74LVC126ADGVRE4 can drive up to 10 LVC1Gxx inputs (Ci ≈ 4.5 pF) at 3.3 V while maintaining specified VOL/VOH levels and tpd. Its ±24 mA output drive capability supports fanout into moderately capacitive loads without signal degradation or excessive rise/fall time distortion.

Is SN74LVC126ADGVRE4 pin-compatible with other LVC126 variants in TVSOP-14?

Yes - SN74LVC126ADGVRE4 shares identical pinout and footprint with all SN74LVC126x DGV variants (e.g., SN74LVC126ADR, SN74LVC126APWR), including same VCC, GND, OE, A, and Y terminal assignments. Mechanical compatibility enables direct replacement within the same package variant group.