Nexperia USA Inc. 74LVC2T45GN,115

Overview

74LVC2T45GN,115 from Nexperia is a dual-bit, dual-supply translating transceiver with 3-state outputs enabling bidirectional level translation between independent voltage domains (1.2 V to 5.5 V). It features two 2-bit I/O ports (A and B), direction control (DIR), IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in mixed-voltage SoC interconnects, such as FPGA-to-ASIC data buses.

For engineers reviewing the 74LVC2T45GN,115 datasheet, 74LVC2T45GN,115 pinout, 74LVC2T45GN,115 application, or 74LVC2T45GN,115 equivalent, this page delivers verified electrical specs, XSON8 package layout, real-world use cases for voltage-domain bridging, and validated alternatives for supply-flexible digital interface design.

Technical Context

This device implements true bidirectional translation via a DIR-controlled signal path: HIGH on DIR enables A→B transmission; LOW enables B→A. Both VCC(A) and VCC(B) are independently configurable from 1.2 V to 5.5 V, allowing interoperability across 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V logic families without external biasing.

IOFF circuitry disables outputs when either supply is at GND, preventing backflow current during partial power-down. The 74LVC2T45GN variant lacks bus-hold circuitry (unlike 74LVCH2T45GN), reducing input leakage but requiring external termination for floating nodes in high-reliability systems.

Key Specifications

Pinout & Package

XSON8 package (SOT1116), 1.2 mm × 1.0 mm × 0.35 mm body, no leads, 8-terminal surface-mount. Pin 1 indicator located below marking code (V5) at lower-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH2T45GN,115, the bus-hold version adds input stability at the cost of 2× static current; versus TXB0102RUGR, the 74LVC2T45GN,115 offers wider voltage range and deterministic DIR control for safety-critical bidirectional protocols.

Availability

74LVC2T45GN,115 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, medical wearable data aggregators, and edge AI module memory expansion requiring stable component supply across extended temperature ranges.

Supply support for 74LVC2T45GN,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 global semiconductor expert delivering high-performance, reliable components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection.

The 74LVC2T45GN belongs to Nexperia's LVC logic family, engineered for low-voltage, high-speed bidirectional translation in space- and power-constrained embedded systems demanding wide supply flexibility and robust thermal performance.

FAQ

What is the maximum allowable voltage difference between VCC(A) and VCC(B)?

The datasheet permits any combination within 1.2 V to 5.5 V per rail - including 1.2 V vs. 5.5 V (4.3 V difference). Absolute maximum ratings allow VCC(A) and VCC(B) up to +6.5 V individually, but operation outside 1.2–5.5 V voids specifications and risks reliability. No derating is required for differential operation.

Does 74LVC2T45GN,115 support hot insertion?

Yes - IOFF circuitry ensures outputs go high-impedance when either VCC is at GND, blocking damaging backflow current during live insertion. This meets IEC 61000-4-2 Level 4 ESD immunity requirements and enables safe field-replaceable module designs without auxiliary power sequencing.

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

No - DIR is strictly referenced to VCC(A). Driving DIR from VCC(B) or another rail violates the absolute maximum rating (VI ≤ VCC(A) + 0.5 V) and may cause latch-up. A level-shifter or resistor divider referenced to VCC(A) is required if DIR originates from a non-A-domain controller.

How does propagation delay vary with supply voltage asymmetry?

Delay is dominated by the *driving* side's VCC: A→B delay depends primarily on VCC(A), while B→A depends on VCC(B). For example, with VCC(A)=1.8 V and VCC(B)=3.3 V, A→B tPLH is ~7.0 ns (per Table 9), whereas B→A tPLH is ~8.3 ns - a 1.3 ns skew that must be budgeted in timing-critical synchronous links.