Texas Instruments SN74LVC1G34DBVTG4

Overview

SN74LVC1G34DBVTG4 from Texas Instruments is a single non-inverting CMOS buffer gate operating from 1.65V to 5.5V, delivering ±24mA output drive at 3.3V, 3.5ns max propagation delay, and Ioff support for live insertion-used in portable audio signal conditioning and logic-level translation between mixed-voltage subsystems.

For engineers reviewing the SN74LVC1G34DBVTG4 datasheet, SN74LVC1G34DBVTG4 pinout, SN74LVC1G34DBVTG4 application, or SN74LVC1G34DBVTG4 equivalent, this page delivers verified package mapping (SOT-23-5), confirmed electrical specs (VCC range, tpd, ICC, VOL/VOH), functional truth table (Y = A), and real-world use cases in consumer AV and embedded interfaces.

Technical Context

This device implements a single positive-logic buffer (Y = A) with rail-to-rail input tolerance up to 5.5V and down-translation capability to VCC. Its Ioff circuitry disables outputs during partial power-down, preventing back-drive current and enabling hot-swap compatibility.

Designed for low-noise, high-speed digital interfacing, it supports 100MHz operation under CL ≤ 50pF loads and maintains stable VOH/VOL across 1.65–5.5V VCC while consuming ≤1μA static current-enabling direct connection to legacy 5V logic without level shifters.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90mm × 2.80mm body, 5-pin surface-mount with exposed pad not present; compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G34DBVTG4, SN74LVC1G34DBVR offers identical performance in volume-optimized packaging, while 74LVC1G34GW,125 provides footprint flexibility at a modest thermal trade-off-neither is pin-compatible without layout revision.

Availability

SN74LVC1G34DBVTG4 is available at Aetrix Electronics and suitable for portable audio, embedded PC, and solid-state drive applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for SN74LVC1G34DBVTG4 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 reliability in industrial and consumer markets.

The SN74LVC1G34 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for mixed-voltage system interfacing, low-power portable electronics, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating frequency supported by SN74LVC1G34DBVTG4?

The SN74LVC1G34DBVTG4 supports reliable operation up to approximately 100MHz under typical conditions (CL ≤ 50pF, VCC = 3.3V). This is derived from its 3.5ns max propagation delay and validated in TI's application notes for high-speed logic interfacing. The actual usable frequency depends on load capacitance and signal integrity-designs exceeding 50pF should include series termination or buffering. SN74LVC1G34DBVTG4 remains stable across its full –40°C to 125°C operating range.

Does SN74LVC1G34DBVTG4 require external pull-up or pull-down resistors on its input pin?

No, SN74LVC1G34DBVTG4 does not require external pull-up or pull-down resistors on its input (pin 2) for basic functionality-but unused inputs must be terminated to VCC or GND to prevent floating states that cause increased ICC and potential oscillation. TI's datasheet explicitly states all unused inputs must be held at valid logic levels; a 10kΩ resistor is recommended only if dynamic control is needed. SN74LVC1G34DBVTG4's CMOS input structure has negligible leakage, making direct connection acceptable.

Can SN74LVC1G34DBVTG4 safely interface a 5V microcontroller output to a 3.3V FPGA input?

Yes, SN74LVC1G34DBVTG4 can safely perform this level translation: its input tolerates up to 5.5V regardless of VCC, and its output swings rail-to-rail (0V to VCC). When powered at 3.3V, it accepts 5V logic-high signals and outputs 0–3.3V compatible with 3.3V FPGA inputs. No external components are needed. SN74LVC1G34DBVTG4 achieves this via internal clamping and down-translation architecture-confirmed in Section 5.3 of the TI datasheet.

What is the thermal resistance (RθJA) of SN74LVC1G34DBVTG4 in its SOT-23-5 package?

The junction-to-ambient thermal resistance (RθJA) for SN74LVC1G34DBVTG4 in the DBV (SOT-23-5) package is 357.1°C/W, as specified in Table 5.4 of the official TI datasheet (SCES519O, October 2025 revision). This value assumes standard JEDEC 2-layer board conditions. Actual thermal performance improves with added copper pour or thermal vias. SN74LVC1G34DBVTG4's low 10μA max ICC minimizes self-heating, making thermal derating rarely necessary in typical consumer applications.

Is SN74LVC1G34DBVTG4 suitable for automotive applications?

SN74LVC1G34DBVTG4 is rated for operation from –40°C to 125°C in all packages except DSBGA (which is limited to 85°C), meeting AEC-Q100 Grade 3 temperature requirements. However, it is not AEC-Q100 qualified-TI does not list it in their automotive-grade portfolio. For production automotive systems, designers should select the automotive-qualified SN74LVC1G34QDBVRQ1 instead. SN74LVC1G34DBVTG4 may be used in non-safety-critical aftermarket or evaluation contexts, but SN74LVC1G34DBVTG4 lacks PPAP documentation and automotive-specific reliability testing.