Nexperia USA Inc. 74AXP8T245BQJ

Overview

74AXP8T245BQJ from Nexperia is an 8-bit dual-supply bidirectional translating transceiver with 3-state outputs, enabling level translation between independent voltage domains (0.9 V to 5.5 V on both sides). It features DIR and OE controls, IOFF partial power-down, and patented glitch-free supply transitions. Used in mixed-voltage SoC interconnects, FPGA I/O bridging, and industrial controller backplanes.

For engineers reviewing the 74AXP8T245BQJ datasheet, 74AXP8T245BQJ pinout, 74AXP8T245BQJ application, or 74AXP8T245BQJ equivalent, key selection criteria include dual-rail voltage flexibility (VCC(A)/VCC(B) = 0.9–5.5 V), sub-10 ns enable/disable timing at 3.3 V, IOFF leakage < ±2 μA in suspend mode, and DHVQFN24 thermal performance for high-density PCB layouts.

Technical Context

The device implements true bidirectional level translation via separate A- and B-side supply references: An, DIR, and OE pins are referenced to VCC(A); Bn pins to VCC(B). Direction control is synchronous-DIR HIGH enables An→Bn, DIR LOW enables Bn→An-while OE (active LOW) independently places both ports in high-impedance state.

Its IOFF circuitry ensures safe partial power-down: when either VCC(A) or VCC(B) is at GND, both An and Bn enter high-impedance OFF-state, blocking damaging backflow current. Glitch suppression operates across supply transition rates from 20 mV/µs to 5.5 V/s without external sequencing.

Key Specifications

Pinout & Package

DHVQFN24 package (SOT815-1), 3.5 × 5.5 × 0.85 mm body, thermally enhanced, no leads, 24 terminals. Exposed thermal pad (non-electrical, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0108PWR and SN74AVCH8T245RHLR, the 74AXP8T245BQJ uniquely combines explicit DIR control, full 0.9–5.5 V dual-rail flexibility, and certified IOFF protection-making it the only choice for mixed-voltage hot-swap systems requiring deterministic direction and zero-backflow safety.

Availability

74AXP8T245BQJ is available at Aetrix Electronics and suitable for automotive ADAS sensor hubs, industrial PLC backplanes, and 5G fronthaul interfaces requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74AXP8T245BQJ 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 logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AXP series targets ultra-low-power, high-speed logic applications demanding wide voltage operation and robust reliability-designed specifically for next-generation mixed-signal systems with 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 full asymmetry (e.g., VCC(A) = 0.9 V, VCC(B) = 5.5 V). No derating is required, and the device maintains specified timing and drive strength across all valid combinations per Table 5.

Does the 74AXP8T245BQJ require external pull-up or pull-down resistors on DIR or OE?

No external biasing is required. DIR and OE have CMOS-compatible inputs with defined VIH/VIL thresholds scaling with VCC(A). Internal input leakage is ≤±0.5 μA, so floating inputs are electrically unsafe-firmware or hardware must actively drive these pins to valid logic levels.

How does the IOFF feature behave when only VCC(A) is powered?

When VCC(A) = 0 V and VCC(B) = 3.3 V, the A-port inputs and outputs enter high-impedance OFF-state with IOFF leakage ≤±2 μA. B-port remains functional but isolated from A-side; no backflow occurs even if Bn pins are driven externally.

Can the 74AXP8T245BQJ translate between 1.8 V and 2.5 V while operating at 125 °C?

Yes. The device is fully characterized across -40 °C to +125 °C for all voltage combinations. At 125 °C and VCC(A)=1.8 V/VCC(B)=2.5 V, tpd remains ≤17 ns (Table 13), VOH ≥2.2 V, and VOL ≤0.7 V-meeting industrial-grade timing and noise margin requirements.