Nexperia USA Inc. 74AVCH1T45GW,125

Overview

74AVCH1T45GW,125 from Nexperia is a single-bit, dual-supply bidirectional voltage level translator/transceiver in TSSOP6 (SOT363-2) package, supporting 0.8 V to 3.6 V on both VCC(A) and VCC(B) rails. It features bus hold circuitry, IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used for interfacing mixed-voltage logic domains such as 1.2 V FPGA I/O to 3.3 V peripheral buses.

For engineers reviewing the 74AVCH1T45GW,125 datasheet, 74AVCH1T45GW,125 pinout, 74AVCH1T45GW,125 application, or 74AVCH1T45GW,125 equivalent, key selection criteria include dual-rail supply flexibility, sub-10 ns propagation delay at 1.8 V–3.3 V translation, IOFF leakage < ±1 μA during power-down, bus hold current ≥25 μA at 1.65 V, and JEDEC-compliant voltage standards across five operating ranges.

Technical Context

The 74AVCH1T45GW,125 implements a direction-controlled bidirectional data path with DIR referenced to VCC(A), enabling A↔B translation without external pull resistors due to integrated bus hold. Its IOFF circuit disables outputs when either VCC rail drops to GND, preventing backflow current.

Dynamic operation supports up to 500 Mbit/s (1.8 V → 3.3 V), with propagation delays as low as 2.4 ns (A→B, VCC(A)=3.3 V, VCC(B)=3.3 V) and enable times calculated as tdis + tpd per direction-critical for synchronous bidirectional bus handshaking in low-latency embedded interconnects.

Key Specifications

Pinout & Package

TSSOP6 (SOT363-2) package: plastic thin shrink small outline, 6 leads, 1.25 mm body width, 0.65 mm lead pitch, 1.1 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply voltage translation applications.

Compared with SN74AVC1T45DBVR and TXS0101DCKR, the 74AVCH1T45GW,125 delivers superior temperature range coverage, tighter IOFF leakage, stronger bus hold, and 20× higher data rate-making it optimal for automotive, industrial, and high-reliability embedded systems requiring robust mixed-voltage interoperability.

Availability

74AVCH1T45GW,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, server baseboard management, and medical imaging sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AVCH1T45GW,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 efficient logic, discrete, and MOSFET solutions with leadership in automotive-grade reliability and energy efficiency.

The 74AVCH1T45GW,125 belongs to Nexperia's advanced voltage translator product line, engineered specifically for seamless interoperability between heterogeneous voltage domains in automotive, industrial, and computing systems where power sequencing resilience and signal integrity are non-negotiable.

FAQ

What is the minimum recommended supply voltage for reliable bus hold operation?

The bus hold circuit is fully functional down to VCC(A) = VCC(B) = 0.8 V, with specified IBHL ≥25 μA and IBHH ≥−25 μA at 1.65 V. At 0.8 V, typical bus hold current is 26 μA (sink) and −24 μA (source), ensuring robust state retention even at lowest rated voltage.

Can the 74AVCH1T45GW,125 be used in unidirectional mode without connecting the DIR pin to a controller?

Yes-DIR can be hardwired to GND (for B→A translation) or VCC(A) (for A→B translation). The DIR input has CMOS-compatible thresholds and draws only ±0.025 μA leakage, making it suitable for static configuration without loading driver circuits.

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

When VCC(B) = 0 V and VCC(A) = 0.8–3.6 V, the B-port outputs are disabled and IOFF leakage is ≤±1 μA. The A port remains functional, but B-terminal signals must stay within –0.5 V to 3.6 V to avoid violating absolute maximum ratings.

Is there a recommended PCB layout practice to minimize crosstalk in high-speed translation?

Place 100 nF ceramic decoupling capacitors within 2 mm of each VCC pin, use solid ground plane beneath the device, route A/B traces differentially with controlled impedance if above 100 MHz, and separate VCC(A) and VCC(B) traces to prevent coupling-especially critical for sub-5 ns propagation delay integrity.