Texas Instruments SN74AUC2G34DCKR

Overview

SN74AUC2G34DCKR from Texas Instruments is a dual non-inverting buffer gate IC designed for ultra-low-voltage, high-speed logic interfacing in space-constrained applications. It operates from 0.8 V to 2.7 V (optimized for 1.65–1.95 V), delivers ±8 mA output drive at 1.8 V, achieves 1.6 ns max propagation delay at 1.8 V, and supports Ioff partial-power-down mode. It is used in voltage-level translation between 1.8-V logic domains and mixed-signal subsystems in portable and battery-powered devices.

For engineers reviewing the SN74AUC2G34DCKR datasheet, SN74AUC2G34DCKR pinout, SN74AUC2G34DCKR application, or SN74AUC2G34DCKR equivalent, key selection criteria include sub-1-V operability, 3.6-V I/O tolerance for mixed-mode signal routing, latch-up immunity (>100 mA per JESD 78 Class II), ESD robustness (2000-V HBM), and NanoFree™ SC-70 (DCK) package compatibility with fine-pitch PCB layouts.

Technical Context

This device implements two independent positive-logic buffers (Y = A) with rail-to-rail output swing and CMOS-compatible input thresholds. Its Ioff circuitry actively disables outputs during power-down, blocking reverse current flow when VCC = 0 V - critical for hot-swap and multi-rail system integrity.

The SN74AUC2G34DCKR uses advanced AUC logic family architecture: optimized for 1.8-V core operation while maintaining 3.6-V I/O tolerance, enabling seamless interfacing between legacy 3.3-V peripherals and modern low-voltage SoCs without external level shifters.

Key Specifications

Pinout & Package

SN74AUC2G34DCKR is packaged in a 6-pin SC-70 (DCK) surface-mount package measuring 2.0 mm × 1.25 mm × 0.9 mm (max height), with pin 1 identified by a chamfered corner and top-side marking "U9_".

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G34DCKR and NC7SZ34P5X, the SN74AUC2G34DCKR uniquely combines sub-1-V operation, Ioff support, 1.6 ns speed at 1.8 V, and dual-channel integration - making it the sole option for next-generation battery-powered systems requiring both ultra-low voltage and robust power-domain isolation.

Availability

SN74AUC2G34DCKR is available at Aetrix Electronics and suitable for mobile baseband interfaces, wearable sensor hubs, industrial PLC I/O modules, automotive body control units, and battery-powered IoT edge nodes requiring stable component supply across extended product lifecycles.

Supply support for SN74AUC2G34DCKR 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 connectivity technologies, with decades of experience in high-reliability logic and power management solutions.

The SN74AUC2G34DCKR belongs to TI's AUC ultra-high-speed CMOS logic family, engineered specifically for low-voltage, low-power, high-integration applications in portable, industrial, and automotive electronics where timing precision and power efficiency are critical.

FAQ

What is the minimum operating voltage for SN74AUC2G34DCKR?

The SN74AUC2G34DCKR operates down to 0.8 V, with guaranteed functionality and specified timing performance across the full 0.8–2.7 V supply range. At 0.8 V, it maintains valid logic thresholds (VIH = 0 V, VIL = 0 V) and delivers usable output drive, making it suitable for emerging sub-1-V microcontroller and energy-harvesting applications. The SN74AUC2G34DCKR is explicitly characterized and rated for this ultra-low-voltage operation in its official datasheet.

Does SN74AUC2G34DCKR support Ioff, and how does it behave during power-down?

Yes, SN74AUC2G34DCKR fully supports Ioff. When VCC = 0 V, its Ioff circuitry disables both outputs (1Y and 2Y), placing them in a high-impedance state and limiting Ioff current to ±10 µA (max) even if input or output pins are driven to 2.7 V. This prevents damaging back-current flow between powered and unpowered sections - essential for hot-plug, multi-rail, and partial-power-down architectures. The SN74AUC2G34DCKR implements this feature natively without external components.

Can SN74AUC2G34DCKR safely interface with 3.3-V logic signals?

Yes, SN74AUC2G34DCKR is 3.6-V I/O tolerant: its inputs and outputs withstand up to 4.1 V (absolute max), allowing direct connection to 3.3-V peripherals without external level shifters. Its VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.8 V ≈ 1.17 V), ensuring reliable recognition of 3.3-V high signals even at low VCC. This capability is confirmed in the "Recommended Operating Conditions" and "Absolute Maximum Ratings" tables of the SN74AUC2G34DCKR datasheet.

What is the maximum propagation delay of SN74AUC2G34DCKR at 1.8 V?

The maximum propagation delay (tpd) of SN74AUC2G34DCKR is 1.6 ns at VCC = 1.8 V, CL = 15 pF, and TA = 25°C - measured from input transition (±0.15 V) to output transition (VOH/VOL). This value is guaranteed across the full operating temperature range (–40°C to +85°C) and represents the worst-case timing for signal buffering in high-speed digital paths. The SN74AUC2G34DCKR achieves this performance while consuming only 10 µA typical ICC.

Which package type does SN74AUC2G34DCKR use, and what are its key mechanical dimensions?

SN74AUC2G34DCKR uses the SC-70 (DCK) package: a 6-pin, surface-mount, plastic small-outline transistor package measuring 2.0 mm × 1.25 mm × 0.9 mm (max height), with 0.65-mm lead pitch. Pin 1 is marked by a chamfered corner, and top-side marking reads "U9_". This compact footprint supports high-density PCB layouts and is compatible with standard reflow profiles (MSL Level-1, peak 260°C). The SN74AUC2G34DCKR's DCK package is documented in TI's DBV/DCK/DRL/YZP package drawings.