Texas Instruments 74LVC1G125DBVTE4

Overview

74LVC1G125DBVTE4 from Texas Instruments is a single 3-state bus buffer gate in SOT-23-5 (DBV) package, performing unidirectional signal buffering with output enable control. It operates from 1.65V to 5.5V VCC, accepts inputs up to 5.5V, delivers ±24mA drive at 3.3V, and achieves 3.7ns max propagation delay - used in high-speed data acquisition, video infrastructure, and SSD interface isolation.

For engineers reviewing the 74LVC1G125DBVTE4 datasheet, 74LVC1G125DBVTE4 pinout, 74LVC1G125DBVTE4 application, or 74LVC1G125DBVTE4 equivalent, key selection criteria include 3-state output timing, Ioff-enabled live insertion support, over-voltage tolerant inputs, and thermal performance in ultra-compact SOT-23 packaging.

Technical Context

The 74LVC1G125DBVTE4 implements a noninverting CMOS buffer with active-low 3-state enable logic: when OE is low, A passes to Y; when OE is high, Y enters high-impedance state. Its balanced CMOS outputs support symmetrical sourcing/sinking, and Ioff circuitry disables all outputs during VCC = 0V for partial power-down operation.

Input structure includes over-voltage tolerance (up to 5.5V independent of VCC), standard CMOS input impedance, and clamp diodes only on negative side. The device requires OE pull-up to VCC during power sequencing to guarantee high-impedance state at startup.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, 1.6mm body width, 0.95mm height, gull-wing leads, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G125DBVR and 74LVC1G125GW,125, the 74LVC1G125DBVTE4 provides identical logic functionality but delivers superior thermal resistance in SOT-23 packaging and is supplied in cut-tape format ideal for engineering validation and small-batch production.

Availability

74LVC1G125DBVTE4 is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, and SSD internal signal routing requiring stable component supply across industrial temperature ranges and long-term design cycles.

Supply support for 74LVC1G125DBVTE4 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 logic solutions with emphasis on reliability, precision, and energy efficiency.

The SN74LVC1G125 product line delivers ultra-small, low-power 3-state logic buffers for voltage translation and bus isolation in space- and power-constrained applications such as portable test equipment, broadcast encoders, and solid-state storage controllers.

FAQ

What is the maximum operating temperature for the 74LVC1G125DBVTE4?

The 74LVC1G125DBVTE4 is rated for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 Class II latch-up testing and supports deployment in automotive under-hood modules, military radar front ends, and industrial SSD controllers where thermal margin is critical. The SOT-23-5 package's RθJA of 357°C/W ensures junction temperature remains within safe limits under typical 10μA ICC loading.

Does the 74LVC1G125DBVTE4 support 5V-tolerant inputs when powered from 3.3V?

Yes, the 74LVC1G125DBVTE4 supports input voltages up to 5.5V regardless of VCC level - including when VCC = 3.3V. This over-voltage tolerance is achieved via dedicated input protection circuitry without positive clamp diodes, enabling direct interfacing with 5V TTL or CMOS signals without external level shifters. The feature is explicitly specified in the Recommended Operating Conditions table and verified across –40°C to 125°C.

How should the OE pin be handled during power-up to ensure high-impedance state?

To guarantee high-impedance output at power-up, the OE pin of the 74LVC1G125DBVTE4 must be tied to VCC through a pullup resistor. TI specifies the minimum resistor value based on the driver's current-sinking capability - typically 10kΩ suffices for most applications. This prevents unintended output assertion during VCC ramp, avoiding bus contention in multi-driver systems. The requirement is documented in both the Description and Detailed Description sections of the datasheet.

Can the 74LVC1G125DBVTE4 drive a 50pF load while meeting timing specifications?

Yes, the 74LVC1G125DBVTE4 is characterized to drive up to 50pF loads while maintaining full timing compliance - including propagation delay (tpd ≤ 4.7ns at 3.3V, –40°C to 125°C) and enable/disable times. This capability is confirmed in Section 5.7 and 5.8 Switching Characteristics tables. For loads exceeding 50pF, TI recommends adding a series damping resistor near the output to suppress ringing without degrading edge rate beyond specification.

Is the 74LVC1G125DBVTE4 pin-compatible with other members of the SN74LVC1Gxx family?

No - the 74LVC1G125DBVTE4 has a unique function-specific pinout (OE/A/GND/Y/VCC) that differs from other SN74LVC1Gxx variants such as inverters (1G04), AND gates (1G08), or Schmitt triggers (1G17). While all share the SOT-23-5 (DBV) package, pin assignments are not interchangeable. Always verify pin configuration using the DBV package diagram in Section 4 of the datasheet before substituting.