onsemi MC74HCT04ADR2

Overview

MC74HCT04ADR2 from onsemi is a hex inverter logic gate IC operating at 4.5–5.5 V supply, with TTL-compatible inputs, 18 ns typical propagation delay at 5 V, and ±4 mA output drive capability. It performs digital signal inversion in microcontroller I/O buffering, clock signal conditioning, and level-shifting circuits for industrial control panels.

For engineers reviewing the MC74HCT04ADR2 datasheet, pinout, applications, or equivalent options, key selection considerations include input threshold compatibility with TTL/CMOS systems, guaranteed noise immunity (≥0.4 V high-level and ≥0.4 V low-level noise margin), output loading capacity up to 10 LSTTL loads, and SOIC-14 package thermal performance under continuous 5 V operation.

Technical Context

This device implements six independent CMOS-based inverters using silicon-gate HCT (High-Speed CMOS TTL-compatible) process technology. Each gate features buffered outputs with symmetrical rise/fall times (typ. 15 ns) and guaranteed input hysteresis for noise rejection in noisy industrial environments.

The MC74HCT04ADR2 operates strictly within the 5 V ±10% range and is not specified for mixed-voltage or 3.3 V interfacing without external level translation. Its input structure ensures compatibility with standard TTL output voltage levels while maintaining CMOS power efficiency.

Key Specifications

Pinout & Package

MC74HCT04ADR2 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, JEDEC MS-012AC compliant outline, and 8.65 mm × 3.9 mm body dimensions. Thermal resistance (θ_JA) is 150°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT04DR and 74HCT04D,653, the MC74HCT04ADR2 offers tighter quiescent current specification (2 µA max), broader temperature validation (−55°C to +125°C), and onsemi's industrial-grade traceability-making it preferred for high-reliability embedded control where long-term supply continuity and thermal robustness are critical.

Availability

MC74HCT04ADR2 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, and legacy instrument cluster interfaces requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for MC74HCT04ADR2 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 MC74HCT04ADR2 belongs to onsemi's High-Speed CMOS (HCT) logic family, designed specifically for 5 V systems requiring TTL compatibility, low power consumption, and robust noise immunity in harsh electromagnetic environments.

FAQ

What is the maximum operating frequency supported by the MC74HCT04ADR2?

The MC74HCT04ADR2 does not specify a maximum operating frequency in its datasheet because it is a combinational logic device whose usable frequency depends on system-level timing constraints. With a typical propagation delay of 18 ns and matched rise/fall times of 15 ns, the MC74HCT04ADR2 supports reliable operation in digital control paths up to approximately 25 MHz under standard load conditions (15 pF, 10 LSTTL).

Does the MC74HCT04ADR2 support 3.3 V input logic levels?

No, the MC74HCT04ADR2 is not guaranteed to correctly interpret 3.3 V logic levels. Its input thresholds are defined for 5 V operation: V_IH ≥ 2.0 V and V_IL ≤ 0.8 V. While a 3.3 V high signal may register as valid in many cases, onsemi does not characterize or guarantee functionality below V_CC × 0.6, so external level translation is required for reliable 3.3 V-to-5 V interfacing with the MC74HCT04ADR2.

Is the MC74HCT04ADR2 RoHS compliant and lead-free?

Yes, the MC74HCT04ADR2 is RoHS compliant and manufactured with lead-free terminations. It meets EU Directive 2011/65/EU and carries the "Pb-Free" marking on the package. The device also complies with China RoHS II and is rated MSL1 (moisture sensitivity level 1), meaning it can be stored indefinitely at ambient conditions without baking prior to reflow.

Can the MC74HCT04ADR2 drive a 50 Ω transmission line directly?

No, the MC74HCT04ADR2 is not designed for direct 50 Ω line driving. Its output drive capability is rated at ±4 mA into resistive loads, corresponding to ~1.25 V swing into 50 Ω at 5 V supply-insufficient for clean signal integrity. For 50 Ω applications, the MC74HCT04ADR2 should feed a dedicated line driver (e.g., SN65LVDS2, DS90LV047A) or use series termination with appropriate impedance matching.

What is the recommended bypass capacitor value for the MC74HCT04ADR2 V_CC pin?

A 0.1 µF X7R ceramic capacitor placed as close as possible to the V_CC (pin 14) and GND (pin 7) terminals is the recommended bypass configuration for the MC74HCT04ADR2. This value suppresses high-frequency switching noise generated during output transitions and maintains stable supply voltage during simultaneous switching of multiple gates. For systems with heavy local current demand, a parallel 1–10 µF tantalum or polymer capacitor may be added.