Nexperia USA Inc. 74AVCH2T45DC-Q100H

Overview

74AVCH2T45DC-Q100 from Nexperia is a dual-bit, dual-supply voltage level translator/transceiver enabling bidirectional logic-level translation between 0.8 V and 3.6 V domains. It features two I/O ports (1A/2A referenced to VCC(A), 1B/2B to VCC(B)), DIR-controlled direction, IOFF partial power-down, and bus hold on all data inputs-used in automotive infotainment domain controllers interfacing 1.2 V SoCs with 3.3 V sensors.

For engineers reviewing the 74AVCH2T45DC-Q100 datasheet, 74AVCH2T45DC-Q100 pinout, 74AVCH2T45DC-Q100 application, or 74AVCH2T45DC-Q100 equivalent, key selection criteria include bidirectional translation latency (as low as 2.4 ns at 3.3 V), AEC-Q100 Grade 1 qualification (-40 °C to +125 °C), IOFF leakage < ±1 μA during power-down, and bus hold current up to ±500 μA for floating input stabilization.

Technical Context

This device implements a dual-rail CMOS transceiver architecture with independent VCC(A) and VCC(B) supplies, allowing asymmetric voltage translation (e.g., 1.2 V ↔ 2.5 V). Direction control is synchronous and referenced solely to VCC(A), ensuring deterministic state transitions without metastability under valid setup/hold timing.

The IOFF circuit actively disables outputs when either supply drops to GND, preventing backflow current and enabling true partial power-down operation. Bus hold circuitry maintains valid logic states on unused 1A/2A/1B/2B pins without external resistors-critical for automotive hot-swap and suspend/resume sequences.

Key Specifications

Pinout & Package

VSSOP8 package (SOT765-1), 2.3 mm body width, 0.5 mm pitch, 8-pin surface-mount plastic very thin shrink small outline package.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH2T45QPWRQ1, the 74AVCH2T45DC-Q100 offers 10× lower quiescent current and integrated bus hold, reducing BOM and improving reliability in low-power automotive modules; versus 74LVC2T45DC-Q100, it delivers 56% higher bandwidth and eliminates external bias components at the cost of narrower voltage ceiling.

Availability

74AVCH2T45DC-Q100 is available at Aetrix Electronics and suitable for automotive ADAS camera interfaces, infotainment MCU bridges, and electric power steering sensor hubs requiring stable component supply across extended temperature ranges and AEC-Q100-compliant traceability.

Supply support for 74AVCH2T45DC-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 leading semiconductor expert in high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with global manufacturing and R&D operations.

This device belongs to Nexperia's automotive-qualified AVCH logic family, designed specifically for low-voltage, high-speed bidirectional level translation in safety-critical vehicle subsystems operating from -40 °C to +125 °C.

FAQ

What is the minimum recommended voltage difference between VCC(A) and VCC(B)?

No minimum voltage difference is required: VCC(A) and VCC(B) may be equal (e.g., both 1.8 V) or differ by as little as 0.1 V. The device operates correctly across the full 0.8 V–3.6 V range on each rail independently, with no cross-rail dependency beyond DIR referencing VCC(A).

Can DIR be driven from a different voltage domain than VCC(A)?

No-DIR is strictly referenced to VCC(A) and must be driven within 0.3×VCC(A) (LOW) to 0.65×VCC(A) (HIGH) thresholds. Driving DIR from VCC(B) or another supply violates input specification and risks undefined behavior or increased leakage.

How does bus hold behave during suspend mode when one supply is at GND?

Bus hold remains active on both A and B ports even when VCC(A) = 0 V or VCC(B) = 0 V. The circuit draws <±5 μA from the powered rail and maintains valid logic states on floating pins-critical for preventing spurious wakeups in low-power automotive sleep modes.

Is there a maximum allowable slew rate on DIR to ensure clean direction switching?

Yes: input transition rate must be ≤5 ns/V (i.e., ≥200 ps rise/fall time for 1 V swing). Exceeding this may cause momentary bus contention during direction reversal; the datasheet specifies Δt/ΔV = 5 ns/V as the maximum allowed for guaranteed glitch-free operation.