Texas Instruments 74LVC2G125DCTRE6

Overview

74LVC2G125DCTRE6 from Texas Instruments is a dual 3-state bus buffer gate operating from 1.65 V to 5.5 V, featuring two independent noninverting buffers with active-low output-enable controls (1OE, 2OE), ±24-mA output drive at 3.3 V, 4.3-ns max propagation delay at 3.3 V, and Ioff support for live insertion and partial-power-down operation. It is used in high-speed data acquisition, video infrastructure, and SSD interconnects where level translation and bus isolation are required.

For engineers reviewing the 74LVC2G125DCTRE6 datasheet, 74LVC2G125DCTRE6 pinout, 74LVC2G125DCTRE6 application, or 74LVC2G125DCTRE6 equivalent, key selection criteria include 3-state output timing (tdis/ten), overvoltage-tolerant inputs (up to 5.5 V), Ioff-enabled power-down protection, and NanoFree™ SM8 package compatibility with space-constrained PCB layouts.

Technical Context

The 74LVC2G125DCTRE6 implements two independent noninverting buffer functions (Y = A) with separate active-low output-enable inputs (1OE, 2OE). Each buffer drives its output to high or low when enabled, and enters high-impedance state when OE is high - enabling bidirectional bus control and signal isolation.

It supports voltage-level translation: inputs tolerate up to 5.5 V regardless of VCC (1.65–5.5 V), allowing down-translation from higher-voltage domains. Its Ioff circuitry ensures <±10 µA leakage when VCC = 0 V, preventing back-drive damage during hot-swap or partial-power-down sequences.

Key Specifications

Pinout & Package

74LVC2G125DCTRE6 uses the SM8 (DCT) package: 8-pin small-outline package with 2.95 mm × 2.80 mm body size, lead pitch of 0.65 mm, and surface-mount gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G126DCTRE6, the 74LVC2G125DCTRE6 provides noninverting signal path integrity essential for timing-critical address/data buses; versus 74LVC2G241DCTRE6, it delivers faster propagation and lower input capacitance - prioritizing speed over noise margin in well-controlled layouts.

Availability

74LVC2G125DCTRE6 is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, and SSD internal interconnects requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 74LVC2G125DCTRE6 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74LVC2G125 family is designed for low-voltage, high-speed bus interfacing in space-constrained systems - emphasizing voltage translation, power-down safety, and minimal footprint through NanoFree™ packaging.

FAQ

What is the maximum operating temperature range for the 74LVC2G125DCTRE6?

The 74LVC2G125DCTRE6 is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range supports deployment in automotive engine compartments, industrial motor drives, and outdoor telecom equipment where thermal stress is significant. The device's thermal metrics - including RθJA = 199.0°C/W for the DCT package - are validated across this full range per JEDEC JESD51 standards.

Does the 74LVC2G125DCTRE6 support level translation between different supply voltages?

Yes, the 74LVC2G125DCTRE6 supports down-translation: its inputs tolerate up to 5.5 V regardless of VCC (1.65–5.5 V), enabling connection to 5-V sources while powered from 1.8-V or 2.5-V rails. However, it does not perform up-translation - outputs swing only between GND and VCC. For bidirectional translation, external circuitry or dedicated level shifters are required.

How should the output-enable (OE) pins be handled during power-up to avoid bus contention?

To ensure high-impedance state at power-up, both 1OE and 2OE pins must be held high until VCC stabilizes. TI recommends tying each OE to VCC via a pullup resistor; minimum value depends on the driver's sink capability - typically 10 kΩ suffices for most applications. Floating OE pins risk undefined output states, potentially causing short-circuits or data corruption on shared buses.

What is the significance of Ioff support in the 74LVC2G125DCTRE6?

Ioff support in the 74LVC2G125DCTRE6 limits input/output leakage to ±10 µA when VCC = 0 V, preventing damaging back-current flow during hot-swap, partial-power-down, or system reset sequences. This feature is critical in modular systems like pluggable SSDs or field-replaceable radar cards, where powered subsystems may remain active while the buffer's supply is cycled.

Can the 74LVC2G125DCTRE6 drive a 50-Ω transmission line directly?

The 74LVC2G125DCTRE6 is not optimized for 50-Ω line driving: its ±24-mA output drive at 3.3 V yields ~138-Ω effective impedance (V/I), making it best suited for unterminated or high-impedance CMOS loads. For 50-Ω lines, series termination (e.g., 33-Ω resistor at source) is recommended to damp reflections. Direct 50-Ω drive risks overshoot, ringing, and excessive current beyond absolute max ratings.