Nexperia USA Inc. 74AVCH4T245BQ-Q10X

Overview

74AVCH4T245BQ-Q10X from Nexperia is an automotive-qualified 4-bit dual-supply translating transceiver enabling bidirectional level translation between independent voltage domains (VCC(A) and VCC(B), each 0.8 V to 3.6 V). It supports two 2-bit or one 4-bit configuration, features active bus hold on all I/Os, IOFF partial power-down, and operates from −40 °C to +125 °C. Used in ADAS domain controllers for interfacing 1.2 V sensor interfaces with 3.3 V MCU buses.

For engineers reviewing the 74AVCH4T245BQ-Q10X datasheet, 74AVCH4T245BQ-Q10X pinout, 74AVCH4T245BQ-Q10X application, or 74AVCH4T245BQ-Q10X equivalent, key selection criteria include configurable direction control (nDIR), dual-rail 3-state output enable (nOE), bus hold current specs at 1.2 V/1.65 V/3.0 V, suspend-mode isolation behavior, and DHVQFN16 package thermal performance under automotive temperature cycling.

Technical Context

This device implements a dual-voltage I/O architecture where nAn/nDIR/nOE pins are referenced to VCC(A), while nBn pins reference VCC(B); direction is controlled per 2-bit segment via dedicated nDIR inputs. The IOFF circuit disables outputs and blocks backflow current when either supply is at GND, ensuring safe partial power-down in vehicle ECU sleep modes.

Bus hold circuitry actively maintains valid logic levels on floating A/B port inputs without external resistors-IBHL ≥ 15 μA and IBHH ≤ −15 μA at 1.4 V, scaling to ±100 μA at 3.0 V-enabling robust noise immunity in high-vibration automotive wiring harnesses.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1), 2.5 × 3.5 × 0.85 mm, side-wettable flanks for AOI-compatible solder joint inspection. Exposed thermal pad (GND-connected) improves thermal resistance in compact automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with SN74AVCH4T245QPWRQ1 and 74LVC4T245GT-Q100, the 74AVCH4T245BQ-Q10X delivers superior thermal management via DHVQFN16, guaranteed bus hold at low voltages (0.8 V), and tighter propagation delay consistency across −40 °C to +125 °C-critical for time-triggered automotive networks.

Availability

74AVCH4T245BQ-Q10X is available at Aetrix Electronics and suitable for ADAS sensor interfaces, electric powertrain inverters, body control modules, and infotainment head units requiring stable component supply across automotive production lifecycles.

Supply support for 74AVCH4T245BQ-Q10X 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.

This device belongs to Nexperia's AVCH automotive logic family, engineered specifically for voltage translation in safety-critical ECUs where reliability across extended temperature ranges and robustness against supply sequencing faults are mandatory.

FAQ

What is the minimum recommended VCC(A) and VCC(B) for guaranteed bus hold operation?

Bus hold is fully functional down to 0.8 V on both VCC(A) and VCC(B). At 0.8 V, IBHL ≥ 26 μA and IBHH ≤ −24 μA per I/O, meeting JEDEC JESD8-12 compliance. Operation below 0.8 V is not characterized and may result in undefined bus hold behavior or increased leakage.

Can 74AVCH4T245BQ-Q10X translate between 0.8 V and 5.0 V logic domains?

No. Absolute maximum VCC(A) and VCC(B) are +4.6 V per datasheet Table 5; recommended operating range is strictly 0.8 V to 3.6 V. Applying 5.0 V violates absolute maximum ratings and risks permanent damage. For 5 V translation, use a dedicated 5 V-tolerant level shifter such as NXH010P120MNF1.

How does suspend mode behave when only VCC(A) is powered?

When VCC(A) = 3.6 V and VCC(B) = GND, the A-side I/Os (1A1–2A2, 1DIR, 1OE, 2DIR, 2OE) remain active and retain bus hold, while B-side outputs (1B1–2B2) enter high-impedance OFF-state. This isolates the unpowered B-bus without affecting A-bus signal integrity.

Is the exposed thermal pad on the DHVQFN16 package electrically connected?

Yes-the exposed pad is internally connected to GND and must be soldered to a PCB GND plane for optimal thermal performance and EMI suppression. Per Figure 5 note (1), if soldered, the land should be connected to GND; floating the pad degrades θJA by >15 K/W and increases junction temperature under continuous 32 mA drive.