Texas Instruments CD74HC14MTG4

Overview

CD74HC14MTG4 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 automotive systems. It operates across 2 V to 6 V supply, supports –55°C to +125°C ambient, delivers 6 independent gates (Y = A), and drives up to 10 LSTTL loads - enabling reliable switch debouncing and clock synchronization in harsh environments.

For engineers reviewing the CD74HC14MTG4 datasheet, CD74HC14MTG4 pinout, CD74HC14MTG4 application, or CD74HC14MTG4 equivalent, key selection criteria include its hysteresis (ΔVT ≥ 0.2 V at 2 V), propagation delay (23–205 ns depending on VCC and load), input threshold symmetry, SOIC-14 package compatibility, and guaranteed operation over extended temperature range without derating.

Technical Context

The CD74HC14MTG4 implements six identical CMOS inverters, each featuring Schmitt-trigger input architecture with defined VT+ and VT− thresholds and hysteresis ΔVT. Its balanced push-pull outputs source/sink ±4 mA (min) at 4.5 V and ±5.2 mA (min) at 6 V while maintaining VOH ≥ 3.98 V and VOL ≤ 0.4 V under load.

It uses standard HC logic family design with no internal level-shifting or voltage translation; all inputs and outputs are referenced to the same VCC and GND. Unused inputs must be terminated to VCC or GND to prevent floating-induced oscillation and excess current draw - a requirement enforced by its high-impedance CMOS input structure and absence of internal pull resistors.

Key Specifications

Pinout & Package

CD74HC14MTG4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant NiPdAu lead finish. Thermal resistance RθJA is 133.6°C/W, supporting operation up to 125°C ambient with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74HC14MTG4, SN74HC14DR offers identical performance with enhanced process control and documentation, while MC74HC14ADTR2G trades lower quiescent current for broader vendor availability - making CD74HC14MTG4 optimal for cost-sensitive, thermally demanding deployments where leakage and hysteresis tightness are critical.

Availability

CD74HC14MTG4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and ruggedized instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD74HC14MTG4 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 experience in high-reliability industrial and automotive components.

The CD74HC14MTG4 belongs to TI's 74HC logic family - engineered for robust noise immunity, wide supply flexibility, and extended temperature operation in mission-critical control systems.

FAQ

What is the maximum capacitive load the CD74HC14MTG4 can drive while maintaining specified propagation delay?

The CD74HC14MTG4 is characterized for CL ≤ 50 pF in its switching specifications, with tpd = 23 ns (max) at 6 V. Driving loads >50 pF increases propagation delay nonlinearly and may cause ringing; TI recommends limiting total load to ≤70 pF and adding series resistance if larger capacitance is unavoidable. The CD74HC14MTG4 datasheet specifies performance only up to 50 pF, so design margins should preserve this limit for timing-critical paths.

Does the CD74HC14MTG4 require external pull-up or pull-down resistors on unused inputs?

Yes - unused inputs on the CD74HC14MTG4 must be terminated to either VCC or GND to prevent floating, which could cause oscillation, excessive current draw, or unpredictable output states. Direct connection is acceptable; if dynamic control is needed, a 10-kΩ resistor is typical. The CD74HC14MTG4 has no internal termination, and leaving inputs unconnected violates TI's layout guidelines and risks device malfunction.

Can the CD74HC14MTG4 operate reliably at 3.3 V supply voltage?

Yes - the CD74HC14MTG4 is fully specified from 2 V to 6 V, including 3.3 V. At VCC = 3.3 V, VIH(min) = 2.31 V and VIL(max) = 1.0 V per datasheet Section 6.3, and hysteresis ΔVT remains ≥0.3 V. All electrical characteristics (VOH, VOL, tpd) are guaranteed across this range, making the CD74HC14MTG4 suitable for mixed-voltage 3.3 V/5 V system interfacing.

What is the meaning of "G4" in the CD74HC14MTG4 part number?

The "G4" suffix in CD74HC14MTG4 indicates TI's green packaging standard: lead-free (Pb-free), RoHS-compliant, and halogen-free construction with NiPdAu lead finish. It also denotes Level-1 moisture sensitivity rating (MSL-1) with unlimited floor life, allowing standard SMT assembly without baking. The CD74HC14MTG4 is not a functional variant - it shares identical logic behavior and specs with CD74HC14MT.

Is the CD74HC14MTG4 pin-compatible with older CD74HC14M variants?

Yes - the CD74HC14MTG4 uses the same SOIC-14 (D) package as CD74HC14M and CD74HC14M96, with identical pinout, footprint, and mechanical dimensions (8.70 mm × 3.90 mm). All share Pin 1 (1A), Pin 2 (1Y), … Pin 14 (VCC), and meet JEDEC MS-012AC standards. The CD74HC14MTG4 replaces obsolete CD74HC14M in new designs while maintaining full drop-in compatibility.