NXP Semiconductors 74HCU04D,652

Overview

74HCU04D,652 from Nexperia is a hex unbuffered CMOS inverter IC operating from 2.0 V to 6.0 V, featuring six independent inverting gates with clamp diodes on all inputs, balanced propagation delays (6 ns typ. at VCC = 6.0 V, CL = 50 pF), and operation across -40 °C to +125 °C - used in crystal oscillator circuits, linear amplifiers, and astable multivibrators.

For engineers reviewing the 74HCU04D,652 datasheet, 74HCU04D,652 pinout, 74HCU04D,652 application, or 74HCU04D,652 equivalent, key selection criteria include supply voltage range, input clamping capability, propagation delay vs. load capacitance, and thermal performance in SO14 packaging.

Technical Context

This device implements six identical unbuffered CMOS inverters in a single monolithic IC, each with symmetrical input/output characteristics and no internal buffering - enabling precise phase inversion and high-fidelity signal shaping in analog and digital timing applications. Its input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

The logic function follows standard inverter truth table (L→H, H→L) with rail-to-rail output swing, VIH/VIL thresholds scaling with VCC (e.g., VIH ≥ 3.6 V at VCC = 4.5 V), and static power consumption as low as 2 μA typical at VCC = 6.0 V with all inputs static.

Key Specifications

Pinout & Package

74HCU04D,652 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter applications.

Compared with 74HC04D,653 and SN74LVC04APWR, the 74HCU04D,652 uniquely combines unbuffered analog-capable operation, wide VCC range, and integrated input clamping - making it irreplaceable in crystal oscillator and linear amplifier implementations where signal integrity and voltage flexibility are critical.

Availability

74HCU04D,652 is available at Aetrix Electronics and suitable for crystal oscillator design, linear amplifier circuits, and astable multivibrator timing applications requiring stable component supply across automotive, industrial, and test equipment programs.

Supply support for 74HCU04D,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 delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.

The 74HCU04 belongs to Nexperia's HCU logic family - engineered for unbuffered analog-digital hybrid use cases including oscillators, amplifiers, and precision timing, rather than pure digital switching.

FAQ

Can 74HCU04D,652 be used as a linear amplifier?

Yes - its unbuffered CMOS structure allows DC biasing into the linear region using resistor feedback. With VCC = 6.0 V, typical open-loop gain is 20 and unity-gain bandwidth is 5 MHz, supporting low-distortion amplification up to ~100 kHz. Figure 13 in the datasheet provides the validated circuit topology and component values.

What is the maximum clock frequency achievable in a crystal oscillator using 74HCU04D,652?

While not a dedicated oscillator IC, the 74HCU04D,652 supports fundamental-mode crystal oscillators up to 20 MHz with appropriate load capacitance (C1/C2) and feedback resistor (R1/R2) selection per Table 8. Stability depends on crystal Q-factor and PCB layout; typical jitter is < 100 ps RMS for 1–10 MHz crystals at VCC = 5.0 V.

Does 74HCU04D,652 require external current-limiting resistors on inputs?

Yes - when interfacing to voltages exceeding VCC or below GND, external series resistors are mandatory to limit input clamping current to ≤ ±20 mA (per Table 4). For example, connecting a 12 V signal to an input with VCC = 5 V requires ≥ 350 Ω to stay within rating. No resistor is needed for standard CMOS-level signals within 0–VCC.

How does thermal derating work for the SO14 package of 74HCU04D,652?

The SO14 (SOT108-1) package has a total power dissipation limit of 500 mW at ≤100 °C ambient, derating linearly by 10.1 mW/K above that temperature. At 125 °C ambient, maximum allowable power drops to 475 mW. This assumes still-air conditions; forced airflow or PCB copper area can improve thermal performance beyond this baseline.