Nexperia USA Inc. 74AVC4T245D,112

Overview

74AVC4T245D,112 from Nexperia is a 4-bit dual-supply translating transceiver enabling bidirectional level translation between independent voltage domains (0.8 V to 3.6 V). It operates as two 2-bit or one 4-bit transceiver, with direction control (nDIR), output enable (nOE), and IOFF partial power-down support. Used in mixed-voltage SoC interconnects, FPGA I/O bridging, and memory subsystems requiring isolation during suspend.

For engineers reviewing the 74AVC4T245D,112 datasheet, 74AVC4T245D,112 pinout, 74AVC4T245D,112 application, or 74AVC4T245D,112 equivalent, key selection criteria include configurable voltage translation range (0.8–3.6 V per rail), 380 Mbit/s max data rate (≥1.8 V ↔ 3.3 V), IOFF-enabled suspend mode, and SO16 package thermal performance at −40 °C to +125 °C.

Technical Context

The device implements dual-rail CMOS logic with separate VCC(A) and VCC(B) supplies, where nAn/nDIR/nOE inputs reference VCC(A) and nBn inputs reference VCC(B). Direction control is synchronous: HIGH on nDIR enables A→B transmission; LOW enables B→A. Output enable (nOE, active LOW) places both ports in high-impedance state for bus isolation.

IOFF circuitry actively disables outputs when either supply drops to GND, preventing backflow current and enabling true partial power-down. In suspend mode (VCC(A) = GND or VCC(B) = GND), all I/O pins enter high-impedance OFF-state regardless of control input states.

Key Specifications

Pinout & Package

74AVC4T245D,112 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard gull-wing leads and 1.27 mm pitch. Thermal performance rated to 500 mW total power dissipation at ≤110 °C ambient, derating linearly above that point.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC4T245PWR, the 74AVC4T245D,112 offers superior thermal dissipation (500 mW vs. 350 mW) in high-ambient environments; versus 74LVC4T245PW,118, it delivers true dual-rail flexibility and IOFF protection essential for modern low-power systems.

Availability

74AVC4T245D,112 is available at Aetrix Electronics and suitable for automotive domain controllers, industrial PLC I/O modules, and embedded SoC interconnects requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AVC4T245D,112 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 high-volume, high-reliability logic, analog, and MOSFET solutions, serving automotive, industrial, and consumer markets with AEC-Q100-qualified components.

The 74AVC logic family targets ultra-low-voltage, high-speed interface applications, specifically engineered for mixed-supply systems where voltage translation, power sequencing, and IOFF protection are mandatory design requirements.

FAQ

What is the minimum valid 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 up to 2.8 V (e.g., 0.8 V ↔ 3.6 V). The device guarantees correct operation across the full 0.8 V–3.6 V range on each rail independently, per JEDEC JESD8 compliance.

Can nOE and nDIR be driven from different voltage domains?

No - nOE and nDIR inputs are referenced solely to VCC(A) and must be driven by signals compatible with VCC(A)'s logic thresholds (VIH/VIL defined relative to VCC(A)). Driving them from VCC(B) or another rail violates input voltage limits and risks latch-up or undefined behavior.

Does the device support hot insertion or live bus swapping?

Yes - IOFF protection and overvoltage-tolerant inputs (up to 3.6 V regardless of VCC(A) or VCC(B)) enable safe hot insertion. When either supply is unpowered, outputs go high-Z and inputs present minimal leakage (<±1 μA), preventing bus contention during plug-in events.

How does propagation delay vary with load capacitance?

Propagation delay increases linearly with load capacitance: typical tpd rises from ~6 ns (CL = 0 pF) to ~12 ns (CL = 60 pF) for A→B path at 3.3 V. Designers must account for this in timing closure - the datasheet provides CL-dependent curves (Fig. 11) for precise margining.