Nexperia USA Inc. 74AXP2T45DCH

Overview

74AXP2T45DCH from Nexperia is a 2-bit dual-supply bidirectional translating transceiver with 3-state outputs, enabling level translation between independent voltage domains (0.9 V to 5.5 V). It features separate VCC(A) and VCC(B) supplies, DIR-controlled data direction (A↔B), and IOFF circuitry for partial power-down. Used in mixed-voltage SoC interconnects, such as FPGA-to-ASIC I/O bridging with independent 1.8 V and 3.3 V rails.

For engineers reviewing the 74AXP2T45DCH datasheet, 74AXP2T45DCH pinout, 74AXP2T45DCH application, or 74AXP2T45DCH equivalent, key selection criteria include dual-rail voltage flexibility, sub-15 ns propagation delay at 3.3 V/2.5 V, IOFF-enabled suspend mode, and ±2 μA max leakage during power-off - critical for battery-backed or hot-swap systems.

Technical Context

The device implements true bidirectional translation via a direction-controlled pass-gate architecture, where DIR selects signal flow path without internal latching. Both ports operate independently under their respective supply references: A-side signals (1A, 2A, DIR) referenced to VCC(A); B-side signals (1B, 2B) referenced to VCC(B).

Patented glitch suppression prevents output transients during asymmetric power-up/down sequences (20 mV/μs to 5.5 V/s), while IOFF disables outputs when either VCC is at GND, forcing both ports into high-impedance OFF-state - essential for system-level power sequencing integrity.

Key Specifications

Pinout & Package

74AXP2T45DCH uses the SOT765-1 (VSSOP8) package: plastic very thin shrink small outline, 8 leads, 2.3 mm body width, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0202DCUR and SN74AVC2T245RSWR, the 74AXP2T45DCH uniquely combines ultra-wide voltage support (0.9–5.5 V per rail), patented glitch suppression, and IOFF-enabled suspend mode - making it the only option qualified for automotive and industrial hot-swap applications requiring simultaneous domain isolation and timing predictability.

Availability

74AXP2T45DCH is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, FPGA-to-MCU interfaces, and USB-C power delivery controller bridges requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74AXP2T45DCH 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, high-reliability logic, analog, and MOSFET solutions with focus on efficiency, miniaturization, and robustness.

The 74AXP series targets low-power, wide-voltage bidirectional translation in space-constrained and thermally demanding applications - designed specifically for automotive, industrial, and computing systems requiring seamless interoperation across heterogeneous voltage domains.

FAQ

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

The datasheet permits any combination within 0.9 V to 5.5 V per rail - including extreme cases like VCC(A) = 0.9 V and VCC(B) = 5.5 V. No derating is required, and the device maintains full functionality and specified timing across this full differential range.

Does 74AXP2T45DCH support hot-swapping between powered and unpowered domains?

Yes. When either VCC(A) or VCC(B) is at GND, the IOFF circuit forces both A and B ports into high-impedance OFF-state, preventing backflow current. This allows safe insertion/removal of boards or modules while other system rails remain active.

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

No. DIR is strictly referenced to VCC(A) and must be driven between 0 V and VCC(A). Driving DIR from VCC(B) or another supply violates absolute maximum ratings and may damage the input stage or cause undefined direction control behavior.

Is there a minimum load capacitance requirement for stable operation?

No minimum load is required. The device operates correctly with CL = 0 pF. Typical dynamic characteristics (e.g., tpd, ten, tdis) are characterized with 5 pF load, but performance remains valid down to no external load - ideal for driving high-impedance inputs like ADC reference buffers or comparator inputs.