Texas Instruments SN74LVC1G34DBVR

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-used in portable audio signal routing and level translation between mixed-voltage subsystems.

For engineers reviewing the SN74LVC1G34 datasheet, SN74LVC1G34 pinout, SN74LVC1G34 application, or SN74LVC1G34 equivalent, key selection criteria include its ultra-small SOT-23-5 (DBV) package, 5.5V-tolerant inputs, down-translation capability, low 1μA ICC, and compatibility with high-speed digital interfaces up to 100MHz in space-constrained consumer electronics.

Technical Context

This device implements a single-buffer function with no internal inversion, supporting rail-to-rail input voltage tolerance up to 5.5V independent of V_CC. Its I_off circuitry actively disables outputs during partial power-down, preventing back-drive current and enabling hot-swap capability in multi-rail systems.

Designed for broad V_CC operation (1.65–5.5V), it delivers consistent 3.5ns t_pd at 3.3V/CL=15pF and maintains ±24mA drive strength across 3V–5.5V, while meeting JESD78 Class II latch-up immunity (>100mA) and full JEDEC ESD ratings (2kV HBM, 1kV CDM).

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90mm × 2.80mm body, 5-pin surface-mount with exposed pad option; optimized for automated placement and thermal performance in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1G07 and SN74AUP1G34, SN74LVC1G34 uniquely balances 5.5V input tolerance, ±24mA push-pull drive, and 3.5ns speed across 1.65–5.5V - making it the only option among the three that supports direct LED driving, hot-swap signaling, and mixed-voltage interconnect without external components.

Availability

SN74LVC1G34 is available at Aetrix Electronics and suitable for portable audio, consumer video, and embedded storage applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and voltage ranges.

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 90,000 products serving industrial, automotive, and personal electronics markets.

The SN74LVC1G34 belongs to TI's LVC logic family - engineered for low-voltage, high-speed, mixed-supply interoperability in space- and power-constrained portable electronics.

FAQ

What is the maximum operating frequency supported by the SN74LVC1G34?

The SN74LVC1G34 supports reliable digital signal transmission up to 100MHz in typical applications, based on its 3.5ns maximum propagation delay at 3.3V with 15pF load. Actual usable frequency depends on trace capacitance, fan-out, and supply stability - design validation above 50MHz requires controlled-impedance routing and proper decoupling per TI's Layout Guidelines. The SN74LVC1G34 does not specify a hard upper frequency limit but is characterized for switching performance across voltage and temperature ranges.

Can the SN74LVC1G34 drive an LED directly?

Yes, the SN74LVC1G34 can drive an LED directly with up to 24mA sink/source capability at 3.3V, as confirmed in its Electrical Characteristics table. When used as a low-side driver (LED anode to V_CC, cathode to Y output), it provides robust current control without external transistors. Ensure forward voltage and current-limiting resistor values comply with the SN74LVC1G34's VOL specification (≤0.55V at 24mA) and absolute maximum ratings. This capability is explicitly cited in TI's Typical Application section for the SN74LVC1G34.

Does the SN74LVC1G34 support partial power-down operation?

Yes, the SN74LVC1G34 supports partial power-down via its I_off feature, which disables outputs when V_CC = 0V to prevent damaging back-current flow. This is validated in the Feature Description and Absolute Maximum Ratings sections, where I_off is specified as ±10μA max. The I_off circuitry ensures safe live insertion in multi-rail systems like docking stations or modular peripherals - a core design requirement explicitly addressed in the SN74LVC1G34's Functional Modes documentation.

What is the recommended bypass capacitor for the SN74LVC1G34?

Texas Instruments recommends a 0.1μF ceramic bypass capacitor placed physically adjacent to the V_CC and GND pins of the SN74LVC1G34, as stated in Section 8.3 of the official datasheet. This value is optimized to suppress high-frequency noise generated during switching transitions. For enhanced broadband filtering, TI permits paralleling with a 1μF capacitor - both must use short, wide traces to minimize inductance. This guidance applies universally across all SN74LVC1G34 package variants, including DBV (SOT-23-5).

Is the SN74LVC1G34 pin-compatible with other single-gate logic devices in the same package?

The SN74LVC1G34 in SOT-23-5 (DBV) package shares identical pinout with industry-standard single-buffer and inverter variants such as SN74LVC1G07 and SN74LVC1G04 - all follow the same 1(NC)/2(A)/3(GND)/4(Y)/5(V_CC) assignment. However, functional compatibility requires verification: SN74LVC1G34 is non-inverting, while SN74LVC1G04 is inverting and SN74LVC1G07 is open-drain. Pin compatibility does not imply drop-in replacement without logic-level or drive-strength review.