Texas Instruments SN74LVC1G34DSFR

Overview

SN74LVC1G34 from Texas Instruments is a single non-inverting CMOS buffer gate designed for 1.65V to 5.5V V_CC operation, performing Y = A logic with 3.5ns max propagation delay at 3.3V, ±24mA output drive, and I_off support for live insertion in portable audio and embedded PC systems.

For engineers reviewing the SN74LVC1G34 datasheet, SN74LVC1G34 pinout, SN74LVC1G34 application, or SN74LVC1G34 equivalent, key selection criteria include voltage translation capability (inputs accept up to 5.5V while operating at 1.65–5.5V V_CC), ultra-small DPW package (0.8mm × 0.8mm), low ICC (≤1μA), and ESD robustness (2kV HBM).

Technical Context

This device implements a single positive-logic buffer (Y = A) with no internal inversion or enable control. Its I_off circuitry actively disables outputs during partial power-down, preventing back-drive current when V_CC = 0V - critical for hot-swap and mixed-voltage system interconnects.

It supports bidirectional voltage translation: inputs tolerate 5.5V regardless of V_CC (1.65–5.5V), and outputs swing rail-to-rail (0V to V_CC) while driving capacitive loads ≤50pF. Switching performance is characterized at CL = 15pF and CL = 30/50pF across –40°C to 125°C.

Key Specifications

Pinout & Package

SN74LVC1G34 is packaged in a 5-pin X2SON (DPW) variant with 0.8mm × 0.8mm body size and 0.5mm pitch. The package has no exposed thermal pad and is 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 and SN74AUP1G34DBVR, SN74LVC1G34 uniquely balances 5V-tolerant inputs, 3.5ns speed at 3.3V, and ±24mA drive - making it optimal for portable audio and embedded PC signal routing where voltage translation and timing margin are co-constrained.

Availability

SN74LVC1G34 is available at Aetrix Electronics and suitable for portable audio docks, embedded PCs, and solid-state drive (SSD) power sequencing requiring stable component supply across automotive-qualified temperature ranges and long production lifecycles.

Supply support for SN74LVC1G34 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 and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and logic ICs.

The SN74LVC1G34 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for voltage translation, signal buffering, and hot-swap compatibility in space-constrained consumer and industrial electronics.

FAQ

What is the maximum operating temperature for SN74LVC1G34 in the DPW package?

The SN74LVC1G34 in DPW package is rated for –40°C to 85°C operating free-air temperature. This rating aligns with commercial and extended industrial use cases, including portable audio docks and embedded PCs where ambient thermal management is limited. Junction temperature must remain ≤150°C under all conditions per absolute maximum ratings.

Does SN74LVC1G34 support true 5V logic-level output swing?

No - SN74LVC1G34 outputs swing from 0V to V_CC, not to 5V. When powered at 3.3V, its output high is ~3.2V; at 5V V_CC, it reaches ~4.9V. Its key capability is 5V-tolerant *inputs*, allowing connection to 5V sources while operating at lower V_CC. The SN74LVC1G34 does not generate 5V outputs unless V_CC = 5V.

Can SN74LVC1G34 drive an LED directly without a series resistor?

No. Although SN74LVC1G34 provides ±24mA output drive at 3.3V, it lacks current regulation. Direct LED connection risks exceeding forward current limits and damaging the LED or the SN74LVC1G34 output stage. A series current-limiting resistor is mandatory - calculated as R = (V_CC − V_F) / I_F, where V_F is LED forward voltage and I_F is desired current.

Is the NC pin on SN74LVC1G34 (DPW package) required to be grounded?

No. Pin 1 in the DPW package is internally unconnected (N.C.). It may be left floating, tied to GND, or tied to V_CC - none affects device function. TI recommends grounding unused N.C. pins for mechanical stability and EMI reduction, but electrical performance of SN74LVC1G34 remains identical regardless of N.C. pin state.

How does I_off functionality work in SN74LVC1G34 during system power-down?

When V_CC = 0V, the I_off circuitry in SN74LVC1G34 disables both input and output structures, limiting leakage current to ±10μA. This prevents back-driving powered-down sections - for example, when a 5V peripheral asserts signals onto an unpowered SN74LVC1G34 input. The feature is automatic and requires no external control, making SN74LVC1G34 suitable for live-insertion applications like modular SSD carriers.