Nexperia USA Inc. 74LVTH125DB,112

Overview

74LVTH125DB,112 from Nexperia is a 3.3 V quad non-inverting 3-state buffer with bus-hold inputs and IOFF partial power-down capability, 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 3.3 V bus interface and level translation between TTL and LVT logic domains.

For engineers reviewing the 74LVTH125DB,112 datasheet, 74LVTH125DB,112 pinout, 74LVTH125DB,112 application, or 74LVTH125DB,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.7 ns), overvoltage-tolerant inputs (up to 5.5 V), bus-hold current (±75–150 μA), IOFF leakage (< ±100 μA at VCC = 0 V), and SO14 package compatibility with legacy 74-series footprints.

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 valid logic states on unused inputs without external pull-ups.

The IOFF functionality disables outputs during power-down, blocking backflow current when VCC = 0 V and I/O pins are biased to up to 4.5 V - critical for hot-swap and mixed-voltage system interoperability. Input thresholds meet TTL-compatible levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) while tolerating 5.5 V inputs.

Key Specifications

Pinout & Package

74LVTH125DB,112 is packaged in SO14 (SOT108-1): plastic small outline, 14-pin, 3.9 mm body width, with gull-wing leads and pin 1 index marker. Pin 7 is GND; pin 14 is VCC; all four buffers share identical input/output/enable topology.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVTH125DB,112, the 74LVT125D,112 omits bus-hold (increasing external component count), while SN74LVC125APWR trades off IOFF and drive strength for automotive qualification - making the 74LVTH125DB,112 uniquely suited for industrial hot-swap and mixed-voltage bus isolation.

Availability

74LVTH125DB,112 is available at Aetrix Electronics and suitable for industrial automation, legacy system upgrades, and modular test equipment requiring stable component supply, long-lifecycle support, and guaranteed SO14 footprint compatibility.

Supply support for 74LVTH125DB,112 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-volume, high-reliability logic, discrete, and MOSFET solutions - serving industrial, automotive, and consumer markets with scalable manufacturing and rigorous quality standards.

The 74LVTH125DB,112 belongs to Nexperia's LVT/H series of advanced BiCMOS bus interface devices, engineered specifically for robust 3.3 V system integration with mixed-voltage tolerance and power-aware features like IOFF and bus-hold.

FAQ

Can 74LVTH125DB,112 safely interface with 5 V logic inputs?

Yes - its inputs tolerate up to 5.5 V regardless of VCC state, enabling direct connection to 5 V TTL outputs without level shifters. This overvoltage capability is explicitly characterized in Table 4 (Limiting Values) and Table 5 (Recommended Operating Conditions), with VI(max) = +7.0 V absolute maximum and VI(operating) = 0–5.5 V.

What is the purpose of the IOFF feature, and how does it behave during power-down?

IOFF disables outputs when VCC = 0 V, preventing backflow current from powered I/O lines into the unpowered IC. Per Table 4, IOFF leakage is limited to ±100 μA with VI/VO = 0–4.5 V, protecting both the device and upstream drivers during partial power-down or hot-swap events.

How does bus-hold functionality eliminate external pull-up resistors?

Bus-hold circuitry injects ±75–150 μA current to retain the last valid logic state on floating inputs. As confirmed in Table 6, IBHL and IBHH values ensure stable HIGH/LOW retention without external biasing - verified across –40 °C to +85 °C and 2.7–3.6 V VCC.

Is 74LVTH125DB,112 pin-compatible with standard 74-series SO14 packages?

Yes - it uses SOT108-1 (SO14) with 1.27 mm lead pitch, 3.9 mm body width, and identical 14-pin gull-wing layout. Pin 1 index, GND (pin 7), and VCC (pin 14) match JEDEC MS-012, ensuring mechanical and solder-reflow compatibility with legacy 74AC/74HC/74LS footprints.