Diodes Incorporated 74AUP1T34FW4-7

Overview

74AUP1T34FW4-7 from Diodes Incorporated is a single-bit, dual-supply, noninverting voltage-level translator IC with 3-state output and IOFF functionality. It enables unidirectional logic signal translation from A to Y across independent VCCA (0.9V–3.6V) and VCCB (0.9V–3.6V) domains, supports partial power-down isolation, and operates from –40°C to +125°C in the X2-DFN1010-6 package.

For engineers reviewing the 74AUP1T34FW4-7 datasheet, 74AUP1T34FW4-7 pinout, 74AUP1T34FW4-7 application, or 74AUP1T34FW4-7 equivalent, key selection criteria include dual-rail supply flexibility, IOFF-controlled high-impedance state during VCCA=0V, input isolation at VCCB=0V, ±6mA drive at 3V, and 4.39ns max propagation delay (3V/3V, CL=10pF).

Technical Context

This device implements a unidirectional level-shifting buffer architecture where input switching thresholds are referenced to VCCA and output VOH tracks VCCB-enabling universal low-voltage translation between any pair of supplies from 0.9V to 3.6V. Its IOFF circuitry activates when VCCA = 0V, forcing Y into high-impedance regardless of VCCB or input voltage.

Input isolation is independently controlled: when VCCB = 0V, the A-input circuit is disabled and draws ≤±1μA even with A biased up to 3.6V. The design includes 100mV typical hysteresis for noise immunity and meets JESD78 Class II latch-up robustness (>100mA).

Key Specifications

Pinout & Package

The 74AUP1T34FW4-7 is housed in a 0.95mm × 0.95mm, 0.35mm height, 6-pin X2-DFN1010-6 package with NiPdAu terminal finish and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating buffer applications.

Compared with SN74AVC1T45DBVR and FXMA108MUTAG, the 74AUP1T34FW4-7 uniquely delivers unidirectional translation with automatic IOFF activation and full 0.9V–3.6V flexibility-making it optimal for space- and power-constrained single-signal isolation where autonomous power-state coordination is required.

Availability

74AUP1T34FW4-7 is available at Aetrix Electronics and suitable for mobile SoC interfacing, industrial sensor hubs, automotive body control modules, and wearable health monitors requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74AUP1T34FW4-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution capabilities spanning Asia, Europe, and North America.

The 74AUP1T34FW4-7 belongs to Diodes' AUP (Advanced Ultra-Low Power) logic family, engineered specifically for energy-efficient voltage translation in portable, industrial, and automotive systems operating across fragmented supply rails.

FAQ

What happens to the output Y when VCCA = 0V and VCCB = 3.3V?

When VCCA = 0V, the IOFF feature activates automatically, placing output Y in a high-impedance (3-state) condition regardless of VCCB voltage or input A state. This prevents back-current flow into the unpowered VCCA domain and provides electrical isolation up to 3.6V, as confirmed in the datasheet function table and IOFF specification.

Can the 74AUP1T34FW4-7 translate from 3.3V to 1.2V (A = 3.3V logic, Y = 1.2V logic)?

No-the 74AUP1T34FW4-7 is unidirectional (A→Y only) and requires VCCA to reference the input domain. To translate 3.3V logic to 1.2V, VCCA must be 3.3V and VCCB must be 1.2V. Input A then swings 0–3.3V relative to VCCA, and output Y swings 0–1.2V relative to VCCB, as defined in the recommended operating conditions and function table.

Is the NC pin on the X2-DFN1010-6 package required to be connected?

No-the NC (pin 5) is internally unconnected and may be left floating, tied to GND, or connected to VCCB based on PCB layout requirements. The datasheet explicitly states it "can be connected to any potential" and does not affect functionality, thermal performance, or ESD behavior when left unconnected.

Does the 74AUP1T34FW4-7 support hot insertion or live swapping between powered domains?

Yes-the combination of IOFF (activated at VCCA = 0V) and input isolation (activated at VCCB = 0V) enables safe hot insertion. When either supply is absent, the corresponding interface is electrically isolated with leakage ≤±5μA, preventing damage or bus contention. This behavior is verified in the absolute maximum ratings and functional description sections of the datasheet.