Texas Instruments SN74LVC1G34DCKTG4

Overview

SN74LVC1G34DCKTG4 from Texas Instruments is a single non-inverting CMOS buffer gate designed for 1.65V to 5.5V V_CC operation, delivering ±24mA output drive at 3.3V, 3.5ns max propagation delay (t_pd) at 3.3V/CL=15pF, and I_off support for live insertion and partial power-down. It serves as a level-translating signal buffer in portable audio interfaces and embedded logic paths.

For engineers reviewing the SN74LVC1G34DCKTG4 datasheet, SN74LVC1G34DCKTG4 pinout, SN74LVC1G34DCKTG4 application, or SN74LVC1G34DCKTG4 equivalent, key selection criteria include its SC70-5 package footprint, 5.5V-tolerant inputs, down-translation capability, low 1μA max I_CC, and guaranteed operation across –40°C to 125°C ambient temperature.

Technical Context

This device implements the Boolean function Y = A in positive logic with no inversion. Its CMOS architecture enables bidirectional voltage translation: inputs accept up to 5.5V regardless of V_CC, while outputs are clamped to V_CC, enabling safe interfacing between 5V legacy logic and lower-voltage microcontrollers.

The integrated I_off circuit actively disables outputs during power-down, blocking back-drive current and supporting hot-plug operation. Thermal performance is characterized by R_θJA = 371.0°C/W (SC70), and it meets JESD 78 Class II latch-up (>100mA) and JESD 22 ESD ratings (2kV HBM, 200V MM, 1kV CDM).

Key Specifications

Pinout & Package

SN74LVC1G34DCKTG4 is packaged in SC70-5 (DCK), a 2.0mm × 2.1mm surface-mount package with 0.65mm pitch, optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1G34GW,125 and MC74VHC1G07DTT1G, the SN74LVC1G34DCKTG4 uniquely combines guaranteed 125°C operation, true push-pull output, and production-validated I_off - making it the preferred choice for thermally demanding, hot-pluggable, or battery-sensitive designs requiring zero external components.

Availability

SN74LVC1G34DCKTG4 is available at Aetrix Electronics and suitable for portable audio docks, SSD power management, TV remote interfaces, and HDMI hot-plug detection requiring stable component supply across industrial temperature grades and long-lifecycle programs.

Supply support for SN74LVC1G34DCKTG4 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 expertise in high-reliability interface ICs.

The SN74LVC1G34 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for low-power, wide-V_CC, and robust level-shifting performance in portable, industrial, and consumer electronics.

FAQ

What is the maximum operating temperature for SN74LVC1G34DCKTG4?

The SN74LVC1G34DCKTG4 is fully specified for operation from –40°C to +125°C ambient temperature. This rating applies to all packages including the DCK (SC70-5) variant, and is verified per JEDEC JESD22-A108 thermal testing standards. The device's R_θJA of 371.0°C/W (DCK) and junction temperature limit of 150°C ensure reliable performance within this range when proper PCB thermal design is followed.

Does SN74LVC1G34DCKTG4 support level translation between different supply voltages?

Yes, SN74LVC1G34DCKTG4 supports bidirectional level translation: its inputs tolerate up to 5.5V independent of V_CC, while outputs swing rail-to-rail between GND and V_CC. For example, with V_CC = 1.8V, it accepts 5V logic inputs and produces 1.8V-compatible outputs - enabling direct interface between 5V microcontrollers and 1.8V FPGAs without external translators.

Can SN74LVC1G34DCKTG4 drive an LED directly?

Yes, SN74LVC1G34DCKTG4 can drive an LED directly when configured as a low-side switch (LED anode to V_CC, cathode to Y output). At V_CC = 3.3V, it delivers up to 24mA sink current, sufficient for indicator LEDs with appropriate series resistance. However, it is not intended for continuous high-current or high-temperature LED driver applications - thermal limits and output voltage drop (V_OL ≤ 0.55V @ 24mA) must be verified per design.

What is the purpose of the N.C. pin on SN74LVC1G34DCKTG4?

Pin 1 of SN74LVC1G34DCKTG4 is designated "No internal connection" (N.C.). It has no electrical connection to the die and serves only as a mechanical alignment aid or thermal pad in some variants. TI's datasheet specifies it may be left floating or connected to GND for improved thermal dissipation - but it must never be tied to V_CC or driven, as it provides no functional role in signal or power paths.

Is SN74LVC1G34DCKTG4 compatible with 1.2V logic inputs?

No - SN74LVC1G34DCKTG4 requires input high-level voltage (V_IH) ≥ 0.65×V_CC for reliable recognition. With V_CC = 1.65V minimum, V_IH must be ≥ 1.07V. A 1.2V logic high falls below this threshold and will not register as a valid HIGH input. For 1.2V systems, use a dedicated 1.2V-compatible buffer such as SN74AUP1G34 or verify compatibility via TI's voltage translation guidelines.