Nexperia USA Inc. 74LVC1T45GW,125

Overview

74LVC1T45GW,125 from Nexperia is a single-bit dual-supply bidirectional translating transceiver with 3-state outputs, enabling level translation between independent voltage domains (1.2 V to 5.5 V). It features separate VCC(A) and VCC(B) supplies, DIR-controlled data direction (A↔B), IOFF-enabled partial power-down, and operates across –40 °C to +125 °C. Used in mixed-voltage I²C, UART, and GPIO interfacing between SoC and peripheral ICs.

For engineers reviewing the 74LVC1T45GW,125 datasheet, 74LVC1T45GW,125 pinout, 74LVC1T45GW,125 application, or 74LVC1T45GW,125 equivalent, key selection criteria include dual-rail supply flexibility, 3-state bus hold (on LVCH variant), IOFF leakage control, propagation delay vs. voltage pairing, and TSSOP6 package thermal performance in space-constrained PCB layouts.

Technical Context

The device implements a direction-controlled bidirectional data path where DIR logic level selects signal flow: HIGH enables A→B translation, LOW enables B→A. Both ports are referenced to their respective supplies-A and DIR to VCC(A), B to VCC(B)-enabling true galvanic isolation of voltage domains without external biasing.

IOFF circuitry actively disables outputs when either VCC(A) or VCC(B) is at GND, preventing back-current during suspend mode; bus hold (in 74LVCH1T45 variant) maintains valid logic states on floating A/B inputs without pull resistors, reducing BOM count and layout complexity in low-power embedded systems.

Key Specifications

Pinout & Package

TSSOP6 (SOT363-2) package: plastic thin shrink small outline, 6-pin, 1.25 mm body width, 0.65 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level translation applications.

Compared with SN74LVC1T45DCKR, the 74LVC1T45GW,125 offers superior thermal qualification and tighter IOFF leakage for safety-critical power sequencing; versus 74LVCH1T45GW,125, it trades bus hold capability for lower static power and marginally better high-speed performance in clean signal environments.

Availability

74LVC1T45GW,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical wearable sensor hubs, and 5G small cell baseband interfaces requiring stable component supply across extended temperature ranges.

Supply support for 74LVC1T45GW,125 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, and energy-efficient components-including logic, discrete, and MOSFET solutions-for automotive, industrial, mobile, and computing markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing with strict power efficiency and wide supply tolerance-designed specifically for voltage translation in heterogeneous SoC-peripheral ecosystems.

FAQ

Can 74LVC1T45GW,125 translate between 1.2 V and 5.0 V simultaneously?

Yes. VCC(A) can be set to 1.2 V while VCC(B) is at 5.0 V, enabling bidirectional translation with guaranteed VOH/VOL levels and 420 Mbps max data rate. The device meets JESD8-7 and JESD36 standards for this pairing, and propagation delay remains within 5.1–8.2 ns depending on direction and temperature.

Does 74LVC1T45GW,125 have built-in bus hold circuitry?

No. Bus hold is exclusive to the 74LVCH1T45 variant. The 74LVC1T45GW,125 requires external pull-up or pull-down resistors on A and B ports when left unconnected to prevent floating inputs, especially in low-power suspend modes where IOFF is active.

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

No absolute maximum difference is specified, but both supplies must remain within 1.2 V to 5.5 V individually. Simultaneous operation at VCC(A) = 1.2 V and VCC(B) = 5.5 V is fully characterized and supported per datasheet Table 12 and Table 13, with validated timing and DC parameters across –40 °C to +125 °C.

How does IOFF protect the device during partial power-down?

IOFF disables both A and B outputs when either VCC(A) or VCC(B) drops to GND, blocking reverse current flow up to ±2 μA. This prevents damage to powered rails and avoids unintended logic states on shared buses-critical for hot-swap capable industrial backplanes and modular server power domains.