Texas Instruments CD74HC14MG4

Overview

CD74HC14MG4 from Texas Instruments is a hex inverter IC with Schmitt-trigger inputs, designed for noise-immune signal conditioning and digital logic inversion in industrial and embedded systems. It operates across 2 V to 6 V supply, supports –55°C to +125°C ambient, delivers hysteresis of 0.6 V (at 6 V), achieves 23 ns propagation delay (6 V, 50 pF load), and drives up to 10 LSTTL loads - enabling reliable switch debouncing and clock synchronization in harsh environments.

For engineers reviewing the CD74HC14MG4 datasheet, CD74HC14MG4 pinout, CD74HC14MG4 application, or CD74HC14MG4 equivalent, key selection considerations include its Schmitt-trigger input hysteresis (ΔVT = 0.6 V at 6 V), rail-to-rail output swing, SOIC-14 package thermal resistance (RθJA = 133.6 °C/W), and guaranteed operation over extended temperature range - all critical for robust edge detection and noise rejection in real-world PCB designs.

Technical Context

This device implements six independent CMOS inverters, each performing Y = A in positive logic, with balanced push-pull outputs capable of sourcing/sinking ±25 mA per channel. Its Schmitt-trigger inputs provide defined switching thresholds (VT+ = 4.2 V, VT− = 3.0 V at VCC = 6 V) and 1.2 V hysteresis, eliminating metastability from slow or noisy signals.

The CD74HC14MG4 uses standard HC-series CMOS process technology, features buffered inputs to reduce capacitive loading effects, and exhibits low dynamic current consumption (ICC = 40 µA max at 6 V, –55°C to +125°C), making it suitable for low-power, high-noise-margin applications where deterministic logic transitions are required.

Key Specifications

Pinout & Package

CD74HC14MG4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads compatible with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverter-with-Schmitt-input applications.

Compared with CD74HC14MG4, SN74HC14DR offers enhanced manufacturability and lifecycle assurance, while MC74HC14ADTR2G provides second-source availability at the cost of marginally reduced thermal efficiency - both require no PCB changes but differ in long-term sourcing strategy and thermal validation scope.

Availability

CD74HC14MG4 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and ruggedized IoT edge devices requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for CD74HC14MG4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability logic families and industrial-grade qualification.

The CD74HC14MG4 belongs to TI's industry-standard 74HC logic family, engineered specifically for robust digital signal conditioning in electrically noisy, thermally demanding environments - emphasizing noise immunity, wide-voltage operation, and extended-temperature reliability.

FAQ

What is the maximum operating supply voltage for CD74HC14MG4?

The absolute maximum supply voltage for CD74HC14MG4 is 7 V, but the recommended operating range is 2 V to 6 V per TI's datasheet Section 6.3. Operating above 6 V risks exceeding absolute maximum ratings and may cause permanent damage or accelerated parametric drift. For reliable long-term operation, maintain VCC ≤ 6 V, especially under high-temperature conditions where junction heating compounds stress.

Does CD74HC14MG4 require external pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of CD74HC14MG4 must be terminated to either VCC or GND to prevent floating states that cause excessive current draw and unpredictable output behavior. TI explicitly recommends direct connection (not via high-value resistors) for completely unused inputs; pull-up/pull-down resistors (~10 kΩ) are acceptable only when inputs may be dynamically enabled later. Leaving inputs unconnected violates Section 11.1 layout guidelines and risks device malfunction.

Can CD74HC14MG4 drive a 50 pF capacitive load reliably?

Yes - CD74HC14MG4 is fully characterized for 50 pF loads, with propagation delay specified at 23 ns (max) and output transition time at 13 ns (max) under those conditions at VCC = 6 V. The device's balanced CMOS outputs ensure stable driving of such loads without oscillation or excessive overshoot, provided proper PCB layout (short traces, ground plane, local bypass capacitor) is followed per Section 11.2 of the datasheet.

What is the hysteresis voltage (ΔVT) of CD74HC14MG4 at 5 V supply?

At VCC = 5 V, the hysteresis voltage ΔVT of CD74HC14MG4 is 0.4 V (minimum) to 1.4 V (maximum), as specified in Section 6.5 Electrical Characteristics. This value is derived from the difference between VT+ (1.7–3.15 V) and VT− (0.9–2.2 V). The typical hysteresis is 1.0 V, providing strong noise immunity for signals with moderate EMI exposure in mixed-signal industrial environments.

Is CD74HC14MG4 pin-compatible with CD74HC14M96?

Yes - CD74HC14MG4 and CD74HC14M96 share identical SOIC-14 (D) package dimensions, pinout, and electrical specifications; both are Texas Instruments' variants of the same base die. The "G4" suffix denotes RoHS-compliant packaging and tape-and-reel format (250 units per reel), while "M96" indicates large tape-and-reel (2500 units). No PCB or schematic changes are needed when substituting between these orderable variants.