Nexperia USA Inc. 74AVC4T3144GU12-QX

Overview

74AVC4T3144GU12-QX from Nexperia is a 4-bit dual-supply level-translating buffer with 3-state outputs, configured for asymmetric bidirectional translation: three channels (A1–A3) translate from VCC(A) to VCC(B), and one channel (B4→YA4) translates from VCC(B) to VCC(A). It supports 0.8 V to 3.6 V on both supplies, delivers up to 380 Mbit/s data rate (≥1.8 V → 3.3 V), and features IOFF circuitry for partial power-down protection. It is AEC-Q100 Grade 1 qualified and used in automotive infotainment domain controllers interfacing mixed-voltage SoCs and peripherals.

For engineers reviewing the 74AVC4T3144GU12-QX datasheet, 74AVC4T3144GU12-QX pinout, 74AVC4T3144GU12-QX application, or 74AVC4T3144GU12-QX equivalent, key selection criteria include dual-rail voltage flexibility, suspend-mode behavior during single-rail power loss, propagation delay asymmetry between translation directions, and compliance with JEDEC standards JESD8-12 through JESD8-B across supply combinations.

Technical Context

This device implements a fixed-direction, non-configurable level-shifting architecture: A1/A2/A3 inputs reference VCC(A) and drive YB1/YB2/YB3 outputs referenced to VCC(B); B4 input references VCC(B) and drives YA4 output referenced to VCC(A). OE is VCC(A)-referenced and active-low, enabling high-impedance OFF-state on all outputs simultaneously.

The IOFF circuit enforces leakage current ≤ ±1 μA when either VCC(A) or VCC(B) is at GND, ensuring safe bus isolation during power sequencing. Suspend mode activates automatically if at least one supply is at GND, placing all outputs in high-impedance regardless of OE state - critical for automotive cold-cranking and wake-up scenarios.

Key Specifications

Pinout & Package

XQFN12 (SOT1174-1) package: 1.70 × 2.00 × 0.50 mm body, 12-terminal no-lead construction with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply level translation applications.

Compared with SN74AVCH4T245PWR and TXB0104RGYR, the 74AVC4T3144GU12-QX offers deterministic asymmetric translation, lower latency, AEC-Q100 qualification, and guaranteed suspend-mode behavior - making it the sole choice for automotive control-path signal bridging where timing predictability and functional safety are mandatory.

Availability

74AVC4T3144GU12-QX is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor interfaces, and EPS control units requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 74AVC4T3144GU12-QX 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

Nexperia is a global semiconductor expert specializing in high-performance, high-reliability logic, analog, and discrete components, with leadership in automotive-qualified solutions.

The 74AVC4T3144GU12-QX belongs to Nexperia's AVC automotive logic family, designed specifically for robust, low-latency voltage translation in safety-critical vehicle subsystems operating across −40 °C to +125 °C.

FAQ

What is the maximum allowable voltage difference between VCC(A) and VCC(B)?

The datasheet specifies independent absolute maximum ratings: VCC(A) and VCC(B) each tolerate −0.5 V to +4.6 V relative to GND. No direct differential limit is stated, but operation requires both supplies within 0.8 V–3.6 V nominal range. Simultaneous application of 0.8 V on one rail and 3.6 V on the other is fully supported and validated per JEDEC standards.

Does OE control all outputs simultaneously, including both A-side and B-side?

Yes. OE is a single VCC(A)-referenced input that places all four outputs - YB1, YB2, YB3, and YA4 - into high-impedance state simultaneously. This synchronized disable behavior ensures clean bus release in multi-drop configurations without timing skew between domains.

Can the device translate from 3.3 V to 1.2 V while maintaining 380 Mbit/s performance?

No. The 380 Mbit/s rating applies only to translations ≥1.8 V to 3.3 V. At 3.3 V → 1.2 V, the maximum data rate is 200 Mbit/s per Table 2. Performance degrades due to reduced noise margin and slower edge rates at lower VCC(B); actual usable rate depends on load capacitance and signal integrity margins.

Is the thermal pad on the XQFN12 package electrically connected or recommended for grounding?

The exposed thermal pad in SOT1174-1 is not electrically connected to any internal node and serves only mechanical and thermal functions. Nexperia's package drawing specifies it as "non-functional" - no solder mask opening or PCB via connection is required, though thermal relief improves junction-to-board conduction in high-power-density layouts.