onsemi MC74HCU04ANG

Overview

MC74HCU04ANG from onsemi is a hex unbuffered inverter IC in SOIC-14 package, operating from 2.0 V to 6.0 V supply, delivering 10 LSTTL load drive capability and propagation delay as low as 12 ns at 6.0 V. It functions as a high-input-impedance CMOS inverter stage for oscillator circuits, pulse shaping, and digital logic inversion in industrial control and sensor interface systems.

For engineers reviewing the MC74HCU04ANG datasheet, pinout, applications, or equivalent options, key selection criteria include its rail-to-rail input compatibility (CMOS/LSTTL), −55 °C to +125 °C operating range, 10 pF input capacitance, 15 pF power dissipation capacitance per inverter, and AEC-Q100 qualification for automotive variants.

Technical Context

The MC74HCU04ANG implements six independent single-stage CMOS inverters using silicon-gate technology, with inputs compatible with both standard CMOS outputs and LSTTL outputs when pullup resistors are used. Its unbuffered architecture enables direct use in crystal and RC oscillator configurations without added phase shift.

Each inverter exhibits symmetrical output drive (±25 mA DC per pin), low input leakage (±1.0 µA max at 125 °C), and guaranteed switching across full temperature and voltage ranges - supporting stable operation in noise-prone environments and wide-supply embedded systems.

Key Specifications

Pinout & Package

MC74HCU04ANG is supplied in a Pb-free SOIC-14 (Case 751A) package with 1.27 mm pitch, 8.55–8.75 mm body width, and 3.80–4.00 mm body length. Pin 7 is GND; Pin 14 is VCC; each inverter pair occupies adjacent pins (A1/Y1 through A6/Y6).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC04DR and 74VHC04M, MC74HCU04ANG uniquely balances wide voltage operation (2.0–6.0 V), full industrial temperature support (−55 °C to +125 °C), and AEC-Q100 availability - making it optimal for cross-sector designs needing supply flexibility and reliability assurance.

Availability

MC74HCU04ANG is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and sensor signal conditioning requiring stable component supply across extended temperature and voltage ranges.

Supply support for MC74HCU04ANG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The MC74HCU04ANG belongs to the HCU logic family - designed specifically for unbuffered, high-speed CMOS inversion in oscillator, waveform shaping, and interface applications where minimal propagation delay and wide supply tolerance are essential.

FAQ

What is the maximum operating frequency achievable with MC74HCU04ANG in an oscillator circuit?

The MC74HCU04ANG supports fundamental crystal oscillator frequencies up to 20 MHz depending on crystal load capacitance and layout parasitics. At 6.0 V supply, its 12 ns propagation delay enables stable oscillation with AT-cut crystals rated for 1–10 MHz; higher frequencies require careful PCB layout and low-Cstray design to maintain loop phase margin. The MC74HCU04ANG datasheet confirms operation in oscillator configurations across the full 2.5–6.0 V range.

Does MC74HCU04ANG support mixed-voltage interfacing between 3.3 V and 5 V logic domains?

Yes, MC74HCU04ANG supports mixed-voltage interfacing: its inputs accept voltages from 0 V to VCC, and outputs swing rail-to-rail. When powered at 3.3 V, it reliably accepts 5 V-tolerant inputs only if external clamping or series resistors limit Vin to ≤6.5 V (absolute max rating). For robust 5 V → 3.3 V level translation, MC74HCU04ANG should be powered at 5 V and used with appropriate pull-downs or resistive dividers on driven inputs.

Is MC74HCU04ANG pin-compatible with older TTL hex inverters like the 74LS04?

Yes, MC74HCU04ANG is explicitly stated in its datasheet to be identical in pinout to the 74LS04 and MC14069UB. All six inverter input/output pairs occupy the same SOIC-14 positions (Pins 1–2, 3–4, etc.), and VCC/GND are on Pins 14/7. However, unlike LS04, MC74HCU04ANG requires no external pullups for LSTTL compatibility and draws significantly lower quiescent current - enabling direct drop-in replacement in most legacy designs.

What is the typical power consumption of MC74HCU04ANG at 5 V and 1 MHz toggle rate?

At VCC = 5.0 V and 1 MHz toggle frequency, the dynamic power consumption of MC74HCU04ANG is calculated using CPD = 15 pF per inverter: PD = 6 × (15 pF × (5.0 V)² × 1 MHz) ≈ 2.25 mW. Adding quiescent ICC (max 40 µA at 125 °C), total power remains below 2.5 mW - making MC74HCU04ANG suitable for battery-operated devices where standby current and switching efficiency are critical.

Can MC74HCU04ANG be used to construct a Schmitt trigger, and what external components are needed?

Yes, MC74HCU04ANG can form a Schmitt trigger using one inverter with two external resistors (R1, R2) as shown in Figure 7 of the datasheet. R1 connects output to input; R2 pulls input to VCC. Thresholds depend on R1/R2 ratio - e.g., R2 = 6×R1 yields ~30% hysteresis. This configuration leverages MC74HCU04ANG's unbuffered gain and high input impedance to achieve clean edge regeneration without additional ICs.