Nexperia USA Inc. 74LVCH1T45GW-Q100H

Overview

74LVCH1T45GW-Q100 from Nexperia is an automotive-qualified, single-bit dual-supply bidirectional translating transceiver with 3-state outputs and active bus hold. It enables level translation between independent voltage domains (1.2 V to 5.5 V on both A and B ports), supports up to 420 Mbps (3.3 V → 5.0 V), features IOFF partial power-down protection, and operates across −40 °C to +125 °C for use in automotive infotainment and ADAS domain controllers.

For engineers reviewing the 74LVCH1T45GW-Q100 datasheet, 74LVCH1T45GW-Q100 pinout, 74LVCH1T45GW-Q100 application, or 74LVCH1T45GW-Q100 equivalent, key selection criteria include dual-rail voltage flexibility, suspend-mode behavior during partial power-down, bus hold functionality for floating inputs, and AEC-Q100 Grade 1 qualification for under-hood and cockpit electronics.

Technical Context

The device implements a direction-controlled bidirectional data path where DIR determines signal flow: HIGH enables A→B translation, LOW enables B→A. Both ports are referenced to independent supplies-A and DIR to VCC(A), B to VCC(B)-enabling true voltage-domain isolation and asynchronous logic-level bridging.

Its IOFF circuitry disables outputs and blocks backflow current when either VCC(A) or VCC(B) is at GND, placing both ports in high-impedance OFF-state. Active bus hold on A/B pins maintains valid logic levels on unused inputs without external pull resistors, reducing BOM count and PCB area in automotive modules.

Key Specifications

Pinout & Package

TSSOP6 (SOT363-2) package: plastic thin shrink small outline, 6-lead, 1.25 mm body width, lead pitch 0.5 mm, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1T45GW-Q100 and TXS0101QPWRQ1, the 74LVCH1T45GW-Q100 uniquely supports 1.2 V operation and integrates bus hold - making it optimal for low-voltage automotive MCUs and noise-sensitive sensor interfaces where pin count and external components must be minimized.

Availability

74LVCH1T45GW-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera bridges, electric power steering sensor hubs, and infotainment head unit expansions requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74LVCH1T45GW-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, and energy-efficient components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

This device belongs to Nexperia's automotive-qualified LVC/LVCH logic family, designed specifically for voltage translation in safety-critical and thermally demanding automotive subsystems requiring AEC-Q100 Grade 1 reliability.

FAQ

What is the minimum operating voltage for VCC(A) and VCC(B)?

The absolute minimum supply voltage for both VCC(A) and VCC(B) is 1.2 V, verified across −40 °C to +125 °C. Operation below 1.2 V is not guaranteed and may result in undefined logic states or failure to meet timing specifications, especially for bus hold activation and IOFF behavior.

Can the 74LVCH1T45GW-Q100 translate between 1.2 V and 5.0 V simultaneously?

Yes - VCC(A) can be set to 1.2 V while VCC(B) is at 5.0 V, enabling bidirectional translation. The device achieves 75 Mbps (1.2 V → 5.0 V) and 60 Mbps (5.0 V → 1.2 V), with propagation delays characterized down to 1.2 V in both directions per datasheet Tables 9–13.

Does the DIR pin require a pull-up or pull-down resistor?

No - DIR is a CMOS input referenced to VCC(A) with defined VIH/VIL thresholds (e.g., 0.8×VCC(A) min for HIGH). External biasing is unnecessary; however, in systems where DIR is driven by open-drain logic, a pull-up to VCC(A) is required for HIGH assertion.

How does suspend mode behave when VCC(A) = 0 V and VCC(B) = 3.3 V?

In this condition, both A and B ports enter high-impedance OFF-state, and IOFF limits leakage to ±2 μA max. The DIR input is inactive, and no signal passes in either direction - ensuring complete isolation of the 3.3 V domain from the unpowered 1.2 V subsystem.