Nexperia USA Inc. 74HC125D,652

Overview

74HC125D,652 from Nexperia is a quad 3-state buffer/line driver IC used for bus isolation and signal routing in digital logic systems. It features four independent non-inverting buffers, each with active-low output enable (nOE), operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers typical propagation delay of 9 ns at VCC = 6.0 V with CL = 50 pF.

For engineers reviewing the 74HC125D,652 datasheet, 74HC125D,652 pinout, 74HC125D,652 application, or 74HC125D,652 equivalent, key selection criteria include 3-state output timing (ten/tdis ≤ 32 ns), CMOS input compatibility, SO14 package thermal derating (10.1 mW/K above 100 °C), and static drive capability (±35 mA per output).

Technical Context

This device implements four identical non-inverting buffer stages, each controlled by an independent active-low output enable input (1OE–4OE). All inputs feature clamp diodes enabling safe interfacing to voltages exceeding VCC when current-limiting resistors are used.

Logic operation follows standard TTL-compatible thresholds for 74HCT variants and CMOS-level thresholds for 74HC variants; this part (74HC125D) uses CMOS input levels (VIH ≥ 3.15 V at VCC = 4.5 V, VIL ≤ 1.35 V). Output drive strength is specified at ±6.0 mA (VOH ≥ 3.98 V, VOL ≤ 0.26 V) under recommended conditions.

Key Specifications

Pinout & Package

74HC125D,652 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width. The package is RoHS-compliant, surface-mountable, and rated for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC125D,652, the 74HCT125D,653 offers improved compatibility with older TTL logic families at no cost to timing or packaging, while the SN74LVC125APWR trades industrial temperature rating and input protection for speed and power efficiency in consumer-grade 3.3 V designs.

Availability

74HC125D,652 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy interface adapter designs requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74HC125D,652 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer applications.

The 74HC125 belongs to Nexperia's industry-standard logic family, designed specifically for robust, low-cost digital signal conditioning and bus management in harsh or thermally demanding environments.

FAQ

Can 74HC125D,652 operate reliably at 3.3 V supply?

Yes. The 74HC125D,652 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH is guaranteed ≥ 2.1 V and VIL ≤ 1.0 V, providing >1.2 V noise margin. Propagation delay increases to ~15 ns (typ), remaining suitable for most 3.3 V logic interfaces.

What is the maximum capacitive load each output can drive?

Each output is characterized up to 50 pF load capacitance per datasheet test conditions. With CL = 50 pF, tpd remains ≤20 ns at VCC = 4.5 V. Driving >50 pF increases transition time and may cause ringing; for >100 pF loads, add series termination or reduce slew rate via output resistor.

Is thermal derating required for continuous operation at +125 °C ambient?

Yes. For the SO14 package (SOT108-1), total power dissipation derates linearly at 10.1 mW/K above +100 °C. At +125 °C ambient, Ptot must be limited to ≤475 mW (500 mW − 25 K × 10.1 mW/K) to maintain junction temperature within safe limits.

Do the input clamp diodes require external current-limiting resistors in all cases?

Yes - clamp diodes conduct if input voltage falls below GND −0.5 V or exceeds VCC + 0.5 V. To limit IIK to ±20 mA (absolute max), a series resistor ≥ (|VIN − VCC| − 0.5 V)/20 mA is required. For example, interfacing a 12 V signal to VCC = 5 V requires ≥325 Ω.