Nexperia USA Inc. 74LVC2T45GT,115

Overview

74LVC2T45GT,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), a direction control input (DIR), IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in mixed-voltage SoC interfacing, such as FPGA-to-ASIC communication with 1.8 V logic driving 3.3 V peripherals.

For engineers reviewing the 74LVC2T45GT,115 datasheet, 74LVC2T45GT,115 pinout, 74LVC2T45GT,115 application, or 74LVC2T45GT,115 equivalent, key selection criteria include dual-supply translation range, IOFF-enabled suspend mode behavior, DIR-controlled data flow directionality, and XSON8 package thermal performance at high ambient temperatures.

Technical Context

This device implements a dual-rail CMOS transceiver architecture where port A is referenced to VCC(A) and port B to VCC(B), with DIR determining signal flow direction: HIGH enables A→B, LOW enables B→A. Both supply rails operate independently across 1.2 V–5.5 V, supporting JEDEC-compliant voltage translation standards including JESD8-7, JESD8-5, JESD8C, and JESD36.

The IOFF circuit disables outputs when either VCC(A) or VCC(B) is at GND, preventing backflow current during partial power-down. In suspend mode, both ports enter high-impedance OFF-state. The 74LVC2T45 variant lacks bus-hold circuitry-unlike the 74LVCH2T45-making it suitable for externally terminated or actively driven buses.

Key Specifications

Pinout & Package

XSON8 plastic extremely thin small outline package (SOT833-1); 8-terminal, no-lead surface-mount; body dimensions 1.0 mm × 1.95 mm × 0.5 mm; wettable flank option available; thermal resistance θJA = 160 K/W (JEDEC standard board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH2T45GT,115, the base 74LVC2T45GT offers lower static current and avoids bus-hold contention in actively driven systems; versus SN74AVC2T245RSWR, it delivers smaller form factor, wider voltage range, and better thermal performance in compact high-density layouts.

Availability

74LVC2T45GT,115 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC expansion modules, server BMC subsystems, and medical imaging sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC2T45GT,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 applications, with leadership in logic, MOSFETs, and ESD protection.

The 74LVC series targets low-voltage, high-speed logic translation in space-constrained and thermally demanding applications, emphasizing robustness, minimal power, and seamless interoperability across voltage domains.

FAQ

Can 74LVC2T45GT,115 translate between 1.2 V and 5.0 V simultaneously?

Yes. VCC(A) can be set to 1.2 V (for a low-voltage processor core) while VCC(B) is set to 5.0 V (for legacy peripherals), with bidirectional data flow controlled by the DIR pin. Input tolerance up to 5.5 V on A-side pins ensures safe operation even when VCC(A) is at minimum.

What happens to the outputs when VCC(A) = 0 V and VCC(B) = 3.3 V?

In this suspend condition, the IOFF circuit activates, forcing both A-port and B-port outputs into high-impedance OFF-state. Output leakage remains ≤ ±2 μA, preventing back-current into the powered 3.3 V rail and protecting downstream circuitry.

Is the XSON8 package of 74LVC2T45GT,115 compatible with reflow soldering per J-STD-020?

Yes. The SOT833-1 package is qualified for standard lead-free reflow profiles (peak temperature 260 °C, 20–40 sec), with MSL Level 1 rating. Its 0.5 mm profile and wettable flanks support automated optical inspection (AOI) and reliable solder joint formation.

How does propagation delay vary with supply voltage combinations?

Delay decreases as both VCC(A) and VCC(B) increase: e.g., A→B tPLH is 23.6 ns at VCC(A)=1.4 V/VCC(B)=1.5 V (+125 °C), but drops to 4.9 ns at VCC(A)=3.3 V/VCC(B)=3.3 V. Full min/max delay tables across all voltage/temp combinations are provided in Sections 12–13 of the datasheet.