Nexperia USA Inc. 74LVT125PW,118

Overview

74LVT125PW,118 from Nexperia is a 3.3 V quad non-inverting 3-state buffer with bus-hold inputs and IOFF partial power-down protection, operating from 2.7 V to 3.6 V supply, delivering ±32 mA/±64 mA output drive, and specified for -40 °C to +85 °C industrial temperature range - used in high-speed 3.3 V bus interface applications such as backplane data routing and FPGA I/O expansion.

For engineers reviewing the 74LVT125PW,118 datasheet, 74LVT125PW,118 pinout, 74LVT125PW,118 application, or 74LVT125PW,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.7 ns), overvoltage-tolerant 5.5 V inputs, bus-hold current (IBHL = 75–150 μA), and IOFF-enabled hot-swap capability in mixed-voltage systems.

Technical Context

This BiCMOS device implements four independent non-inverting buffers, each controlled by an active-low 3-state enable input (nOE). Each buffer features bus-hold circuitry that maintains logic state on unused inputs without external pull-ups, eliminating floating node risks.

The IOFF circuit disables outputs when VCC = 0 V, blocking backflow current during partial power-down - critical for live insertion and system-level power sequencing. Inputs tolerate up to 5.5 V regardless of VCC, enabling safe interfacing with 5 V logic while powered from 3.3 V.

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): 14-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Compared with SN74LVC125APW and 74ALVC125PW, the 74LVT125PW,118 uniquely combines bus-hold, IOFF, and 5.5 V input tolerance - making it the only option among the three qualified for live-insertion and mixed-voltage bus hold without external components.

Availability

74LVT125PW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, hot-swappable module interconnects, and mixed-voltage system bridging requiring stable component supply across extended temperature and lifecycle demands.

Supply support for 74LVT125PW,118 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 high-performance, reliable logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74LVT series targets high-speed 3.3 V digital interfacing with robustness for real-world system integration - emphasizing bus integrity, power sequencing resilience, and mixed-voltage interoperability.

FAQ

Can 74LVT125PW,118 be used with a 5 V microcontroller driving its inputs?

Yes - its inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. When powered from 3.3 V, it safely accepts 5 V logic HIGH signals without damage or level translation, enabling direct connection to legacy 5 V peripherals or microcontrollers.

Does 74LVT125PW,118 require external pull-up resistors on unused inputs?

No - it integrates bus-hold circuitry on all data inputs (1A–4A), providing 75–150 μA holding current to maintain the last valid logic state. This eliminates external pull resistors, reducing BOM cost and PCB footprint while preventing floating-input metastability.

What happens to outputs when VCC is disconnected during system maintenance?

The IOFF circuit automatically disables all outputs when VCC drops below ~0.8 V, limiting backflow current to ≤ ±100 μA. This protects both the unpowered device and upstream 3.3 V or 5 V sources during live insertion/extraction or partial power-down sequences.

How does the 3-state enable timing affect bus arbitration in multi-master systems?

Enable/disable propagation delays (tPZH ≤ 4.7 ns, tPLZ ≤ 4.5 ns at VCC = 3.6 V) ensure rapid, predictable bus release - critical for minimizing bus turnaround time in protocols like I²C multi-master or custom parallel arbitration schemes where nanosecond-level timing margins matter.