NXP Semiconductors 74LV125D,118

Overview

74LV125D,118 from NXP Semiconductors is a quad non-inverting 3-state buffer/line driver in SO14 package, operating from 1.0 V to 5.5 V supply, with propagation delay as low as 9 ns at 3.3 V and −40 °C to +125 °C temperature range. It serves as a bus interface and signal isolation device in low-voltage digital systems including industrial controllers and embedded communication modules.

For engineers reviewing the 74LV125D,118 datasheet, 74LV125D,118 pinout, 74LV125D,118 application, or 74LV125D,118 equivalent, key selection considerations include its 1.0 V minimum supply compatibility, TTL-level input acceptance at 2.7–3.6 V, 3-state output control per channel, ground bounce < 0.8 V at 3.3 V, and guaranteed operation up to +125 °C.

Technical Context

The 74LV125D,118 implements four independent CMOS buffer channels, each with active-low 3-state enable (nOE) controlling high-impedance output (Z) when asserted. Its Si-gate CMOS architecture ensures pin and functional compatibility with 74HC125 and 74HCT125 while enabling lower-voltage operation down to 1.0 V.

Input thresholds are specified for multiple VCC ranges: VIH = 2.0 V (at VCC = 2.7–3.6 V), VIL = 0.8 V (same range); output drive capability includes VOH ≥ 2.82 V at IO = −8 mA/VCC = 3.0 V and VOL ≤ 0.40 V at IO = 8 mA/VCC = 3.0 V, supporting robust noise margins in mixed-signal environments.

Key Specifications

Pinout & Package

74LV125D,118 uses the SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV125D,118, the 74LVC125A,118 offers superior static power efficiency and speed at 3.3 V, while the SN74LV125AD provides automotive-grade qualification - neither is pin-compatible without verifying layout tolerances for thermal pad differences, and both require validation of enable timing margins in high-noise environments.

Availability

74LV125D,118 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and embedded test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74LV125D,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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74LV125D,118 belongs to NXP's LV (Low-Voltage) logic family, designed specifically for interoperability across mixed-voltage digital systems while maintaining industrial-grade temperature and reliability performance.

FAQ

What is the minimum supply voltage at which 74LV125D,118 guarantees correct operation?

The 74LV125D,118 guarantees full functionality down to 1.0 V supply voltage when inputs are driven to GND or VCC, as confirmed in Table 5 (Recommended Operating Conditions). This enables use in energy-harvesting and battery-powered systems where supply rails drop below 1.2 V, unlike standard HC or HCT families that require ≥2.0 V.

Does 74LV125D,118 support TTL-level input signals?

Yes - the 74LV125D,118 accepts TTL input levels when VCC is between 2.7 V and 3.6 V, with VIH = 2.0 V (min) and VIL = 0.8 V (max) per Table 6. This allows direct connection to legacy 5 V TTL outputs without external level-shifting circuitry in mixed-voltage designs.

What is the maximum output current drive capability of 74LV125D,118 at 3.3 V supply?

At VCC = 3.3 V, the 74LV125D,118 delivers ±16 mA output current per channel (IO = ±16 mA), with VOH ≥ 3.6 V and VOL ≤ 0.55 V under those conditions (Table 6). This supports driving moderate capacitive loads and multiple CMOS inputs without signal degradation.

Can 74LV125D,118 be used in automotive under-hood applications?

Yes - the 74LV125D,118 is rated for operation from −40 °C to +125 °C and features HBM ESD protection exceeding 2000 V, making it suitable for under-hood automotive applications such as engine control modules and body electronics where ambient temperatures exceed 105 °C.

How does the 3-state enable logic work on 74LV125D,118?

Each of the four buffers has an active-low output enable input (1OE, 2OE, 3OE, 4OE on pins 1, 4, 10, 13). When nOE is LOW, the corresponding output (nY) follows the input (nA); when nOE is HIGH, the output enters high-impedance (Z) state, electrically disconnecting the buffer from the bus - enabling multi-master arbitration and bus sharing.