Texas Instruments SN74LVC1G34DBVT

Overview

SN74LVC1G34 from Texas Instruments is a single non-inverting CMOS buffer gate designed for 1.65V to 5.5V operation, delivering ±24mA output drive at 3.3V, 3.5ns max propagation delay (tpd), and Ioff support for live insertion and partial power-down. It serves as a level-translating signal conditioner in portable audio interfaces and embedded logic buffering.

For engineers reviewing the SN74LVC1G34 datasheet, SN74LVC1G34 pinout, SN74LVC1G34 application, or SN74LVC1G34 equivalent, key selection criteria include its 5-pin SOT-23 (DBV) package, 1.65–5.5V VCC compatibility, input tolerance up to 5.5V, low ICC (≤1μA), and guaranteed 3.5ns tpd at 3.3V/CL=15pF.

Technical Context

The SN74LVC1G34 implements a single positive-logic buffer (Y = A) with rail-to-rail CMOS output swing and true down-translation capability - inputs accept up to 5.5V regardless of VCC, enabling interfacing between 5V legacy logic and lower-voltage systems. Its Ioff circuitry actively disables outputs during power-down, preventing back-drive current and supporting hot-plug operation.

It operates across –40°C to 125°C (for DBV package), meets JESD78 Class II latch-up (>100mA), and provides robust ESD protection (2kV HBM, 200V MM, 1kV CDM). The device is optimized for low-capacitance loads (≤50pF) and requires no external enable control - it is always active.

Key Specifications

Pinout & Package

SN74LVC1G34DBVT uses the 5-pin SOT-23 (DBV) package: 2.90mm × 2.80mm body, 1.27mm pitch, surface-mount, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1G17GW,125 and SN74AUP1G34DBVR, the SN74LVC1G34DBVT offers the best balance of speed (3.5ns), drive strength (±24mA), and 5.5V-tolerant inputs - making it optimal for mixed-voltage signal conditioning where timing precision and interface robustness are jointly critical.

Availability

SN74LVC1G34DBVT is available at Aetrix Electronics and suitable for portable audio interfaces, SSD control signaling, and TV backlight timing circuits requiring stable component supply and long-term industrial availability.

Supply support for SN74LVC1G34DBVT 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 leadership in high-reliability logic families.

The SN74LVC1G34 belongs to TI's LVC (Low-Voltage CMOS) logic series, engineered for broad VCC compatibility, low power, and robust mixed-signal interfacing in consumer, computing, and industrial electronics.

FAQ

What is the maximum operating temperature for SN74LVC1G34DBVT?

The SN74LVC1G34DBVT in the SOT-23 (DBV) package is rated for operation from –40°C to +125°C ambient temperature. This extended range supports deployment in automotive cabin modules, industrial SSDs, and high-density computing equipment where thermal margins are constrained. Thermal derating is not required within this specification.

Does SN74LVC1G34DBVT require external pull-up or pull-down resistors on its input?

No - the SN74LVC1G34DBVT does not require external pull-up or pull-down resistors on its input (Pin 2) when actively driven. However, any unused input must be terminated to either VCC or GND to prevent floating states that could increase ICC or cause erratic output behavior. TI recommends a 10kΩ resistor if default biasing is needed.

Can SN74LVC1G34DBVT drive a 50pF load while maintaining its 3.5ns propagation delay?

No - the 3.5ns max tpd is specified at CL = 15pF. At CL = 50pF, the typical tpd increases to ~4.1ns (at 3.3V, –40°C to 85°C), remaining within functional timing budgets for most applications. The device is characterized to drive up to 50pF reliably, though delay and edge rate degrade predictably with increasing load capacitance.

Is SN74LVC1G34DBVT pin-compatible with other 5-pin SOT-23 logic gates?

Yes - SN74LVC1G34DBVT shares the standard 5-pin SOT-23 (DBV) pinout with TI's SN74LVC1Gxx family (e.g., SN74LVC1G00, SN74LVC1G08), including identical Pin 1 (N.C.), Pin 2 (A), Pin 3 (GND), Pin 4 (Y), and Pin 5 (VCC). This enables drop-in replacement for functionally compatible gates without PCB redesign.

What decoupling capacitor value is recommended for SN74LVC1G34DBVT?

A 0.1μF ceramic capacitor is recommended for SN74LVC1G34DBVT, placed as close as possible between Pin 5 (VCC) and Pin 3 (GND). TI also notes that paralleling a 1μF capacitor improves broadband noise suppression. The capacitor must be X7R or better dielectric, mounted with minimal trace length to maintain low ESL.