NXP Semiconductors 74AVCH1T45GM-Q100H

Overview

74AVCH1T45GM-Q100 from Nexperia is a single-bit, dual-supply bidirectional voltage level translator IC designed for automotive applications. It enables logic-level translation between 0.8 V and 3.6 V domains (e.g., 1.2 V ↔ 3.3 V), features IOFF partial power-down protection, active bus hold on I/O pins, and operates across −40 °C to +125 °C. It serves as a critical interface in ADAS sensor hubs and infotainment domain controllers where mixed-voltage SoC peripherals require reliable signal integrity.

For engineers reviewing the 74AVCH1T45GM-Q100 datasheet, 74AVCH1T45GM-Q100 pinout, 74AVCH1T45GM-Q100 application, or 74AVCH1T45GM-Q100 equivalent, key selection criteria include dual-rail supply flexibility (VCC(A)/VCC(B) = 0.8–3.6 V), AEC-Q100 Grade 1 qualification, IOFF-enabled suspend mode, bus hold functionality eliminating external resistors, and verified 500 Mbit/s data rate at 1.8 V → 3.3 V translation.

Technical Context

This device implements a direction-controlled transceiver architecture with independent VCC(A) and VCC(B) rails, where DIR input referenced to VCC(A) determines signal flow: HIGH enables A→B, LOW enables B→A. Both ports support 3-state operation and high-impedance OFF-state during suspend (when either VCC rail = GND).

The internal bus hold circuit actively maintains unused A/B inputs at valid logic levels without external components, while IOFF circuitry disables outputs and blocks damaging backflow current during partial power-down - critical for hot-plug and low-power sleep modes in automotive ECUs.

Key Specifications

Pinout & Package

Package: SOT363 (SC-88), 6-pin plastic surface-mounted package, 2.1 mm × 1.25 mm footprint, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage level translation applications.

Compared with SN74AVC1T45QDRYRQ1 and TXS0101QPWRQ1, the 74AVCH1T45GM-Q100 delivers superior high-temperature performance (+125 °C), higher speed (500 Mbit/s), lower leakage (±1 µA IOFF), and integrated bus hold - making it optimal for demanding automotive GPIO bridging where reliability and component count reduction are critical.

Availability

74AVCH1T45GM-Q100 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment domain controllers, and electric power steering ECUs requiring stable component supply with full AEC-Q100 traceability and long-term production support.

Supply support for 74AVCH1T45GM-Q100 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 focused on high-volume, high-reliability standard logic, discrete, and MOSFET solutions, with deep expertise in automotive-grade components.

The 74AVCH1T45GM-Q100 belongs to Nexperia's automotive-qualified AVCH logic family, engineered specifically for robust bidirectional level translation in harsh-temperature vehicle networks where signal integrity, low power, and functional safety are paramount.

FAQ

What is the maximum allowable supply voltage for 74AVCH1T45GM-Q100?

The absolute maximum supply voltage for both VCC(A) and VCC(B) is +4.6 V per the datasheet limiting values table. However, recommended operation is strictly 0.8 V to 3.6 V. Exceeding 3.6 V risks violating JEDEC compliance and may degrade IOFF performance or cause latch-up. The 74AVCH1T45GM-Q100 must never operate above 3.6 V in automotive designs to maintain AEC-Q100 qualification integrity.

Does 74AVCH1T45GM-Q100 support unidirectional translation only, or can it handle bidirectional signals?

The 74AVCH1T45GM-Q100 is explicitly designed for bidirectional translation controlled by the DIR pin: HIGH enables A→B flow, LOW enables B→A flow. Its dual-rail architecture and symmetric I/O structure allow true bidirectional operation without external logic. Unlike unidirectional translators, the 74AVCH1T45GM-Q100 maintains signal integrity in both directions with matched propagation delays (e.g., 2.4–9.9 ns A→B and B→A across temperature).

How does the bus hold feature work on 74AVCH1T45GM-Q100, and what design benefit does it provide?

The bus hold circuit on the 74AVCH1T45GM-Q100 actively drives A and B pins to valid logic levels (HIGH or LOW) when left floating, using internal feedback transistors. At 3.0 V, it sources/sinks up to ±100 µA - sufficient to override noise and prevent metastability. This eliminates external pull-up/pull-down resistors, reducing BOM cost, PCB area, and potential signal degradation from resistor parasitics - especially valuable in dense automotive modules.

Is 74AVCH1T45GM-Q100 compatible with 5 V logic systems?

No, the 74AVCH1T45GM-Q100 is not compatible with 5 V logic. Its absolute maximum input voltage is +4.6 V, and its recommended operating range is 0.8 V to 3.6 V for both VCC(A) and VCC(B). Inputs tolerate up to 3.6 V, but sustained 5 V signals will exceed ratings and risk damage. For 5 V interfacing, a different level translator such as the 74LVC1T45 (5 V tolerant) must be used - the 74AVCH1T45GM-Q100 is strictly for sub-3.6 V domains.

What happens to the 74AVCH1T45GM-Q100 outputs during power-down of one supply rail?

When either VCC(A) or VCC(B) drops to GND, the 74AVCH1T45GM-Q100 automatically enters suspend mode: both A and B ports go to high-impedance OFF-state, and IOFF circuitry blocks backflow current. This behavior is guaranteed per datasheet Table 4 function table and prevents bus contention or damage during staggered power sequencing - a key requirement in automotive multi-rail ECUs where supplies ramp independently.