Nexperia USA Inc. 74AVCH4T245BQ,115

Overview

74AVCH4T245BQ,115 from Nexperia is a 4-bit dual-supply translating transceiver enabling bidirectional level translation between 0.8 V and 3.6 V domains. It operates as two independent 2-bit transceivers or one 4-bit unit, with separate VCC(A) and VCC(B) supplies, direction control (nDIR), and 3-state output enable (nOE). Used in mixed-voltage SoC interconnects, FPGA I/O bridging, and memory subsystem voltage translation.

For engineers reviewing the 74AVCH4T245BQ,115 datasheet, 74AVCH4T245BQ,115 pinout, 74AVCH4T245BQ,115 application, or 74AVCH4T245BQ,115 equivalent, key selection criteria include configurable voltage translation range (0.8–3.6 V per rail), bus hold circuitry eliminating external resistors, IOFF partial power-down support, and DHVQFN16 thermal-enhanced packaging for high-density PCB layouts.

Technical Context

The device implements dual-rail CMOS logic with independent input referencing: nAn/nDIR/nOE tied to VCC(A), nBn tied to VCC(B). Direction control is synchronous and non-latched - HIGH enables A→B data flow, LOW enables B→A. Output enable (nOE) is active-low and forces both ports into high-impedance when asserted.

Suspend mode activates when either VCC(A) or VCC(B) = GND, placing all I/Os in high-Z while preserving bus hold on the powered side. IOFF circuitry limits backflow current during partial power-down, meeting JEDEC JESD78 Class II latch-up immunity (>100 mA).

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, no leads, exposed thermal pad (GND-connected recommended), 16 terminals, wettable flank compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH4T245RTER and 74LVC4T245GM,132, the 74AVCH4T245BQ,115 uniquely combines DHVQFN thermal efficiency, full suspend/IOFF protection, and 380 Mbit/s capability - making it optimal for automotive and industrial systems requiring reliability across power-state transitions.

Availability

74AVCH4T245BQ,115 is available at Aetrix Electronics and suitable for PCIe add-in cards, FPGA interposers, automotive ADAS sensor hubs, and industrial PLC backplanes requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74AVCH4T245BQ,115 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 production of essential semiconductors, with core strengths in logic, MOSFETs, diodes, and ESD protection devices.

The 74AVCH4T245 belongs to Nexperia's advanced voltage-translating logic family, engineered specifically for reliable, low-power, mixed-voltage system interconnect in automotive, industrial, and computing applications.

FAQ

Can 74AVCH4T245BQ,115 translate between 0.8 V and 3.6 V simultaneously?

Yes - VCC(A) and VCC(B) may be independently set from 0.8 V to 3.6 V, enabling direct translation between any combination within that range (e.g., 0.8 V ↔ 3.3 V). Input thresholds scale with respective supply rails, and output drive strength adapts to the destination VCC, ensuring robust signal integrity without external biasing.

Does the DHVQFN16 package require soldering the exposed thermal pad?

No - the thermal pad (terminal 1 index area) has no electrical requirement to be soldered. If connected, it must remain electrically floating or tied to GND. When left unsoldered, thermal performance relies on perimeter terminal conduction; for high-duty-cycle or high-speed operation, GND connection is strongly recommended to reduce junction temperature by up to 15 °C.

How does bus hold behave when one supply rail is unpowered?

Bus hold remains active only on the powered side. In suspend mode (e.g., VCC(A) = 3.3 V, VCC(B) = 0 V), bus hold functions on nAn/nDIR/nOE pins referenced to VCC(A), holding those inputs at valid logic levels. No bus hold is applied to nBn pins since VCC(B) is inactive - they default to high-impedance with no active retention.

What is the minimum pulse width guaranteed for nOE control?

The minimum nOE pulse width is 1.0 ns at VCC = 3.0–3.6 V and −40 °C to +125 °C (per Table 14). This ensures reliable output enable/disable transitions even under worst-case voltage and temperature conditions, supporting fast bus arbitration cycles in real-time systems without added timing margin.