onsemi MC74HCT04ANG

Overview

MC74HCT04ANG from onsemi is a hex inverter logic IC operating at 4.5–5.5 V supply, with TTL-compatible inputs, CMOS outputs, 18 ns typical propagation delay at 5 V, and ±4 mA output drive capability. It performs digital signal inversion in microcontroller I/O conditioning, clock buffering, and level-shifting circuits.

For engineers reviewing the MC74HCT04ANG datasheet, pinout, applications, or equivalent options, key selection considerations include input threshold compatibility with legacy TTL systems, fan-out capability in 5 V logic families, noise immunity under industrial EMI conditions, and through-hole DIP-14 packaging for prototyping and legacy board replacement.

Technical Context

This device belongs to the 74HCT family, designed for direct interface between TTL and CMOS logic domains. Its Schmitt-trigger-free inputs follow standard TTL voltage thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), while CMOS-compatible outputs deliver rail-to-rail swing and high noise margins.

The MC74HCT04ANG implements six independent inverters in a single monolithic silicon die. Each gate features symmetrical rise/fall times (~15 ns at 5 V, 50 pF load), low quiescent current (< 2 µA), and guaranteed operation across –55 °C to +125 °C ambient temperature range.

Key Specifications

Pinout & Package

MC74HCT04ANG is housed in a 14-pin plastic dual in-line package (PDIP-14) with 0.3-inch body width and 0.1-inch lead pitch. Pin 7 is GND; Pin 14 is V_CC. All six inverters are non-inverting in structure but functionally inverting per gate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC74HCT04ANG, SN74HCT04N offers identical functionality with narrower temperature qualification, while 74HCT04D provides the same logic performance in a compact SOIC package-neither is drop-in replaceable without verifying thermal, mechanical, and qualification requirements.

Availability

MC74HCT04ANG is available at Aetrix Electronics and suitable for industrial control panels, legacy equipment repair, and embedded system prototyping requiring stable component supply and long-term obsolescence management.

Supply support for MC74HCT04ANG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74HCT04ANG belongs to the 74HCT logic family, engineered specifically to bridge TTL and CMOS logic domains in mixed-technology systems while maintaining industrial-grade reliability and wide-temperature operation.

FAQ

What is the maximum operating frequency supported by the MC74HCT04ANG?

The MC74HCT04ANG does not specify a maximum clock frequency in its datasheet because it is a combinational logic device-not a sequential element. Its usable frequency limit depends on propagation delay and load capacitance: with a 50 pF load and 5 V supply, the typical propagation delay is 18 ns, enabling reliable operation in digital paths up to approximately 25 MHz for single-gate transitions. The MC74HCT04ANG remains functional beyond this point, but system-level timing margins must be verified per application.

Does the MC74HCT04ANG have built-in Schmitt-trigger inputs?

No, the MC74HCT04ANG uses standard TTL-compatible input thresholds without hysteresis. Its input switching points are fixed at V_IL ≤ 0.8 V and V_IH ≥ 2.0 V, making it unsuitable for noisy analog signal conditioning. For applications requiring noise rejection on slow-rising signals, a dedicated Schmitt-trigger device such as the MC74HCT14ANG should be used instead of the MC74HCT04ANG.

Can the MC74HCT04ANG drive LED indicators directly?

Yes, the MC74HCT04ANG can drive standard 2 mA LEDs directly when configured in active-low mode (output sinking current). With a 5 V supply and typical V_OL of 0.4 V, a 2.2 kΩ series resistor yields ~2 mA forward current. However, for higher-brightness LEDs or multi-LED loads, external current-limiting transistors are recommended, as the MC74HCT04ANG's absolute maximum output current is ±25 mA per pin, and sustained operation above ±4 mA reduces long-term reliability.

Is the MC74HCT04ANG RoHS compliant?

Yes, the MC74HCT04ANG is RoHS compliant and meets the EU Directive 2011/65/EU requirements. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). The device carries the "RoHS Compliant" marking on its package and is listed in onsemi's official RoHS compliance documentation for the 74HCT logic family.

What is the recommended decoupling strategy for the MC74HCT04ANG?

A minimum 0.1 µF ceramic capacitor placed as close as possible to the V_CC (Pin 14) and GND (Pin 7) pins is required for stable operation. For boards with multiple MC74HCT04ANG devices or high-speed switching loads, add a bulk 4.7 µF–10 µF tantalum or aluminum electrolytic capacitor near the power entry point. Avoid shared vias between decoupling caps and ground planes to prevent ground bounce, especially in systems where the MC74HCT04ANG drives capacitive loads exceeding 50 pF.