Nexperia USA Inc. 74AVC8T245BQ,118

Overview

74AVC8T245BQ,118 from Nexperia is an 8-bit dual-supply translating transceiver enabling bidirectional level translation between 0.8 V and 3.6 V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled direction, active-low OE for 3-state control, and IOFF circuitry for partial power-down isolation. Used in mixed-voltage SoC interconnects, such as FPGA-to-ASIC data buses with 1.2 V/1.8 V or 1.8 V/3.3 V interfaces.

For engineers reviewing the 74AVC8T245BQ,118 datasheet, 74AVC8T245BQ,118 pinout, 74AVC8T245BQ,118 application, or 74AVC8T245BQ,118 equivalent, key selection criteria include configurable voltage translation range (0.8–3.6 V per rail), maximum data rate (380 Mbit/s at ≥1.8 V→3.3 V), suspend-mode behavior during power-down, and DHVQFN24 thermal performance.

Technical Context

The device implements a dual-rail CMOS transceiver architecture with separate input reference domains: An, DIR, and OE are referenced to VCC(A); Bn pins are referenced to VCC(B). Direction control is synchronous and non-latched-data flows An→Bn when DIR = HIGH, Bn→An when DIR = LOW.

IOFF circuitry actively disables outputs and blocks backflow current when either VCC(A) or VCC(B) is at GND, enforcing high-impedance OFF-state on both ports in suspend mode. Static and dynamic parameters-including VIH/VIL thresholds, propagation delays (e.g., 2.7 ns min / 8.6 ns max at 3.3 V), and power dissipation capacitance-are fully characterized across -40 °C to +125 °C.

Key Specifications

Pinout & Package

DHVQFN24 package (SOT815-1): 3.5 mm × 5.5 mm × 0.85 mm body, 24-terminal leadless quad flat, thermal-enhanced, no leads, exposed die pad (non-soldered or floating GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC8T245RHLR and 74LVC8T245PW,118, the 74AVC8T245BQ,118 uniquely supports true independent dual-rail operation down to 0.8 V, delivers highest data rate (380 Mbit/s), and provides guaranteed suspend-mode isolation-making it the sole fit for ultra-low-voltage heterogeneous interconnects.

Availability

74AVC8T245BQ,118 is available at Aetrix Electronics and suitable for automotive ADAS sensor hubs, industrial PLC backplanes, FPGA-to-ASIC control buses, and PCIe sideband interfaces requiring stable component supply across extended temperature ranges.

Supply support for 74AVC8T245BQ,118 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, analog, and MOSFET solutions for automotive, industrial, and computing markets.

The 74AVC8T245 product line targets mixed-voltage system interconnects, specifically designed to replace discrete level-shifting solutions in space-constrained, thermally demanding applications requiring robust partial power-down behavior.

FAQ

What is the minimum valid VCC(A) and VCC(B) voltage for functional operation?

The device operates correctly with VCC(A) and VCC(B) independently set from 0.8 V to 3.6 V. Below 0.8 V, input thresholds (VIH/VIL) and output drive strength fall outside specification-functional operation is not guaranteed. The 0.8 V lower limit is validated per JESD8-12 and applies across the full -40 °C to +125 °C temperature range.

Can OE and DIR be driven from different voltage domains than their respective VCC rails?

No. DIR and OE inputs are strictly referenced to VCC(A) and must be driven within 0 V to VCC(A); violating this risks undefined logic states or latch-up. Similarly, Bn pins require signals referenced to VCC(B). Cross-domain driving (e.g., 3.3 V signal into DIR while VCC(A) = 1.2 V) is prohibited and not supported by the IOFF or ESD structures.

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

When VCC(B) = 0 V (GND) and VCC(A) is powered, the device enters suspend mode: all Bn pins go high-impedance, and A1–A8 also enter high-Z regardless of DIR/OE state. This is enforced by internal IOFF circuitry-no external pull-ups/downs override this behavior, ensuring complete bus isolation during asymmetric power sequencing.

Is the exposed thermal pad on the DHVQFN24 package electrically connected or required to be soldered?

The exposed pad (terminal 1 index area) is not electrically connected-it serves only for thermal conduction. Nexperia specifies no electrical or mechanical requirement to solder it; if soldered, the land must remain floating or tied to GND. Thermal performance testing confirms 15.0 mW/K derating above 117 °C with standard PCB copper pour, even without pad soldering.