Nexperia USA Inc. 74AVCH1T45GW-Q100H

Overview

74AVCH1T45GW-Q100 from Nexperia is a single-bit, dual-supply voltage level translator/transceiver enabling bidirectional logic-level translation between 0.8 V and 3.6 V domains. It features active bus hold on data I/Os, IOFF partial power-down protection, and AEC-Q100 Grade 1 qualification for automotive use in engine control units, ADAS domain controllers, and infotainment interfaces.

For engineers reviewing the 74AVCH1T45GW-Q100 datasheet, 74AVCH1T45GW-Q100 pinout, 74AVCH1T45GW-Q100 application, or 74AVCH1T45GW-Q100 equivalent, this device supports high-speed unidirectional/bidirectional translation (up to 500 Mbit/s), operates across -40 °C to +125 °C, and delivers robust ESD immunity (HBM >8 kV) with low dynamic power dissipation.

Technical Context

The device implements a direction-controlled bidirectional transceiver architecture where DIR (referenced to VCC(A)) selects signal flow: LOW enables B→A translation, HIGH enables A→B. Both A and B ports are fully I/O-capable with input thresholds dynamically scaled to their respective supply voltages (VCC(A) and VCC(B)).

IOFF circuitry disables outputs when either VCC(A) or VCC(B) is at GND, blocking backflow current during partial power-down. Bus hold maintains floating inputs at valid logic levels without external pull resistors, reducing system component count and improving noise immunity in automotive wiring harnesses.

Key Specifications

Pinout & Package

TSSOP6 plastic thin shrink small outline package (SOT363-2), 6-pin, body width 1.25 mm, lead pitch 0.65 mm, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0101QPWRQ1 and SN74AVC1T45DBVR, the 74AVCH1T45GW-Q100 uniquely combines AEC-Q100 Grade 1 qualification, integrated bus hold, and 500 Mbit/s capability - making it the sole option for high-speed, safety-critical automotive translation where reliability and component count reduction are mandatory.

Availability

74AVCH1T45GW-Q100 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS domain controllers, and infotainment systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74AVCH1T45GW-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 delivering high-performance, reliable components for automotive, industrial, and consumer markets, with leadership in logic, power, and analog devices.

This device belongs to Nexperia's automotive-qualified AVCH logic family, designed specifically for robust, low-power voltage translation in harsh automotive environments where signal integrity and functional safety are critical.

FAQ

What is the minimum recommended supply voltage for reliable bus hold operation?

Bus hold remains functional down to VCC(A) = VCC(B) = 0.8 V, with sustaining currents of ±24 μA at 1.2 V and scaling to ±500 μA at 3.6 V. At 0.8 V, IBHL and IBHH are ≥26 μA and ≥−24 μA respectively - sufficient to maintain logic states against typical automotive noise margins without external resistors.

Can VCC(A) and VCC(B) be powered in any sequence?

GND must be applied first, but VCC(A) and VCC(B) may be powered in any order. The device enters Suspend mode if either supply is at GND while the other is active, disabling outputs and limiting leakage to ±5 μA - ensuring safe operation during staggered power sequencing in multi-rail automotive ECUs.

How does the DIR input behave when VCC(A) is 1.2 V?

At VCC(A) = 1.2 V, VIH(DIR) = 0.65 × 1.2 V = 0.78 V min, and VIL(DIR) = 0.35 × 1.2 V = 0.42 V max. This ensures compatibility with 1.2 V logic families and provides 360 mV noise margin - critical for reliable direction control in noisy engine bay environments.

Is external termination required for 500 Mbit/s operation?

No external termination is required for standard PCB traces ≤10 cm. The device's low output impedance (<15 Ω typical) and controlled edge rates (5 ns/V input transition limit) ensure signal integrity at 500 Mbit/s into 15 pF loads, as validated in Nexperia's test circuit (Fig. 6) with 2 kΩ load and 15 pF capacitance.