Nexperia USA Inc. 74AVCH1T45GM,115

Overview

74AVCH1T45GM,115 from Nexperia is a single-bit, dual-supply voltage level translator/transceiver enabling bidirectional logic-level translation between 0.8 V and 3.6 V domains. It features active bus hold on data I/Os, IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in mixed-voltage SoC interfacing, such as connecting a 1.2 V FPGA I/O bank to a 3.3 V sensor interface.

For engineers reviewing the 74AVCH1T45GM,115 datasheet, 74AVCH1T45GM,115 pinout, 74AVCH1T45GM,115 application, or 74AVCH1T45GM,115 equivalent, key selection criteria include bidirectional translation capability, IOFF current isolation during power sequencing, bus hold strength at low VCC (e.g., 1.2 V), and propagation delay asymmetry (A→B vs B→A) under asymmetric supply conditions.

Technical Context

The device implements a direction-controlled, dual-rail transceiver architecture with independent VCC(A) and VCC(B) supplies referenced to a common GND. DIR input is referenced solely to VCC(A), and the internal bus hold circuit sustains unused inputs at valid logic levels without external resistors.

IOFF circuitry disables outputs when either supply drops to GND, blocking backflow current. Suspend mode activates automatically if VCC(A) or VCC(B) = 0 V, placing both A and B ports in high-impedance state regardless of DIR state.

Key Specifications

Pinout & Package

XSON6 plastic extremely thin small outline package (SOT886), no leads, 6 terminals, body size 1.0 × 1.45 × 0.5 mm. Pin 1 indicator located below marking code (K5) at lower-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0101DCUR and SN74LVC1T45DBVR, the 74AVCH1T45GM,115 uniquely supports 0.8 V operation with integrated bus hold and XSON6 packaging - making it optimal for ultra-low-voltage, space-constrained, and floating-bus-sensitive applications where reliability trumps raw drive strength.

Availability

74AVCH1T45GM,115 is available at Aetrix Electronics and suitable for mobile SoC interfacing, industrial sensor hubs, automotive body control modules, and wearable health monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AVCH1T45GM,115 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 logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume electronics.

The 74AVCH1T45 belongs to Nexperia's advanced voltage translator product line, engineered specifically for seamless interoperability between heterogeneous voltage domains in portable, automotive, and industrial systems.

FAQ

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

Bus hold remains functional down to 0.8 V on both VCC(A) and VCC(B). At 1.2 V, typical IBHL is 25 μA and IBHH is –25 μA - sufficient to maintain logic states against typical PCB leakage (<1 μA) and EMI-induced glitches. Below 0.9 V, bus hold strength degrades and external termination may be needed.

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

No. DIR is referenced exclusively to VCC(A); its VIH/VIL thresholds scale with VCC(A) (e.g., VIH = 0.65 × VCC(A)). Driving DIR from a separate rail risks undefined logic states or excessive input current. Always derive DIR from the same supply as VCC(A).

How does propagation delay asymmetry impact I²C bidirectional operation?

A→B delay (e.g., 3.1 ns at 1.8 V/3.3 V) differs from B→A (e.g., 2.8 ns), affecting setup/hold timing margins during clock stretching. System design must use worst-case delay (max of both directions) for timing analysis - especially critical for 400 kHz Fast-mode Plus I²C with tight tSU:DAT requirements.

Is the XSON6 package (SOT886) compatible with standard reflow profiles for lead-free assembly?

Yes. The SOT886 package is qualified for IPC/JEDEC J-STD-020D moisture sensitivity level 1 and supports peak reflow temperatures up to 260 °C. Its 0.5 mm height and thermal pad-less construction allow compatibility with standard stencil thicknesses (0.12 mm) and 6°C/s ramp rates.