Nexperia USA Inc. 74AXP1T45GXZ

Overview

74AXP1T45GXZ from Nexperia is a single-bit, dual-supply translating transceiver with 3-state output enabling bidirectional voltage-level translation between independent logic domains (e.g., 1.8 V ↔ 3.3 V). It features two I/O ports (A and B), direction control (DIR), and separate VCC(A) and VCC(B) supplies (0.9 V to 5.5 V each), supporting seamless interconnection of mixed-voltage systems in portable and industrial electronics.

For engineers reviewing the 74AXP1T45GXZ datasheet, 74AXP1T45GXZ pinout, 74AXP1T45GXZ application, or 74AXP1T45GXZ equivalent, key selection criteria include its IOFF-enabled partial power-down capability, ±2 μA max leakage in suspend mode, sub-15 ns propagation delay at 3.3 V/2.5 V, 1.5 pF typical input capacitance, and guaranteed operation from –40 °C to +125 °C.

Technical Context

The device implements patented glitch-free supply transition handling, eliminating output glitches during power-up/down across slew rates from 20 mV/μs to 5.5 V/s. Its DIR-controlled bidirectional data path allows A→B transmission when DIR = HIGH (referenced to VCC(A)) and B→A when DIR = LOW.

IOFF circuitry actively disables outputs and blocks damaging backflow current when either VCC(A) or VCC(B) is at GND, forcing both A and B into high-impedance OFF-state - critical for hot-swap and battery-backed subsystems requiring robust isolation during partial power-down.

Key Specifications

Pinout & Package

X2SON6 package (SOT1255-2): ultra-thin, leadless, 1.0 × 0.8 × 0.32 mm body with 6 terminals; thermal-enhanced for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0101DCKR and SN74AVC1T45DBVR, the 74AXP1T45GXZ uniquely combines explicit DIR control, true dual-supply independence down to 0.9 V, and certified IOFF isolation - making it the only choice for safety-critical or thermally demanding mixed-rail systems requiring deterministic behavior during supply transients.

Availability

74AXP1T45GXZ is available at Aetrix Electronics and suitable for USB-C PD controllers, automotive body electronics, industrial PLC I/O modules, and wearable sensor hubs requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74AXP1T45GXZ 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 essential efficiency technologies - delivering high-performance, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AXP series targets ultra-low-power, wide-voltage-range logic translation in space- and energy-constrained applications, emphasizing robustness across supply transitions and extreme temperatures.

FAQ

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

No maximum differential is specified - the device is designed for independent operation across its full 0.9 V to 5.5 V range per supply. Both rails may be set to any valid voltage within that span (e.g., VCC(A) = 1.2 V, VCC(B) = 5.0 V), and the internal level-shifting circuitry handles the translation without restriction or derating.

Does the 74AXP1T45GXZ require external pull-up resistors on A or B ports?

No external pull-ups are required for basic level translation functionality. The device operates as a true 3-state buffer with active drive in both directions. Pull-ups may be added only if needed for open-drain bus compatibility (e.g., I²C), but they are not part of the core translation mechanism and do not affect DIR-controlled directionality.

How does IOFF behavior differ from standard high-impedance state?

IOFF actively disables the output stage and blocks current flow even when one supply is powered and the other is at GND - preventing backflow through parasitic paths. Standard 3-state only disables drive strength; IOFF adds a physical isolation barrier, verified to limit leakage to ±2 μA max across –40 °C to +125 °C when either VCC is 0 V.

Can DIR be driven by a voltage lower than VCC(A)?

Yes - DIR accepts input voltages up to 5.5 V regardless of VCC(A), and its logic threshold scales with VCC(A) (VIH = 0.7×VCC(A), VIL = 0.3×VCC(A)). This allows direct interfacing with higher-voltage control signals while maintaining noise margin and ensuring reliable direction latching across all supported supply combinations.