onsemi MC74LCX14M

Overview

MC74LCX14M from ON Semiconductor is a low-voltage CMOS hex Schmitt-trigger inverter operating from 2.3 V to 3.6 V supply, featuring 5.5 V-tolerant inputs, 24 mA balanced output drive, near-zero static supply current (10 µA), and hysteresis thresholds (VT+ = 0.9–2.2 V, VT− = 0.4–1.5 V). It serves as a noise-immune line receiver for slow-rising signals in mixed-voltage digital interfaces.

For engineers reviewing the MC74LCX14M datasheet, pinout, applications, or equivalent options, key selection considerations include its 5 V-tolerant input capability, Schmitt-trigger hysteresis for signal conditioning, SOEIAJ-14 package footprint, and compatibility with LVTTL/LVCMOS systems requiring robust noise immunity and level translation.

Technical Context

The MC74LCX14M implements six independent Schmitt-trigger inverters with asymmetric input threshold voltages-VT+ and VT− vary with VCC (e.g., 0.9 V / 0.4 V at 2.5 V, 2.2 V / 1.5 V at 3.0 V), delivering 0.3–1.2 V hysteresis. Its input structure supports safe interfacing with 5 V TTL sources without external level shifters.

Each inverter provides symmetrical ±24 mA output drive at VCC ≥ 3.0 V, with propagation delays of 1.5–7.8 ns (CL = 30–50 pF) and output-to-output skew ≤ 1.0 ns. Quiescent ICC remains ≤10 µA across −40°C to +85°C, enabling ultra-low-power operation in battery-sensitive applications.

Key Specifications

Pinout & Package

MC74LCX14M uses the SOEIAJ-14 (JEDEC MS-012) surface-mount package (Case 965), 9.9 mm × 5.25 mm body, 1.27 mm lead pitch, with gull-wing leads and Pb-free finish (G suffix variant available).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC14APWR and 74AHC14PW, the MC74LCX14M uniquely combines 5.5 V input tolerance, 24 mA drive, and SOEIAJ-14 packaging - making it optimal for industrial control interfaces requiring robust 5 V signal reception and board-space-constrained through-hole-compatible layouts.

Availability

MC74LCX14M is available at Aetrix Electronics and suitable for industrial control panels, sensor interface modules, and embedded timing circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant procurement.

Supply support for MC74LCX14M 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

ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, and cloud infrastructure markets.

The MC74LCX14M belongs to the LCX low-voltage CMOS logic family, designed specifically for mixed-supply systems requiring 5 V-tolerant interfacing, low dynamic power, and Schmitt-trigger noise immunity in space-constrained applications.

FAQ

What is the maximum input voltage rating for MC74LCX14M?

The MC74LCX14M supports DC input voltages from −0.5 V to +5.5 V, enabling safe interfacing with 5 V TTL outputs without external protection. This 5.5 V tolerance is explicitly specified in the Absolute Maximum Ratings table and verified across temperature (−40°C to +85°C) and process corners. Exceeding +5.5 V risks permanent damage to internal input structures.

Does MC74LCX14M support operation at 2.5 V supply?

Yes, MC74LCX14M is fully specified for 2.5 V operation: recommended VCC range is 2.3 V to 3.6 V, with validated parameters including VT+ = 0.9 V (min), VT− = 0.4 V (min), VOH = 2.2 V (min at IOH = −12 mA), and VOL = 0.4 V (max at IOL = 12 mA). All AC and DC characteristics in the datasheet include 2.5 V test conditions.

What package type does MC74LCX14M use?

MC74LCX14M uses the SOEIAJ-14 package (JEDEC MS-012, Case 965), a 14-pin small-outline integrated circuit with gull-wing leads, 1.27 mm pitch, and 9.9 mm × 5.25 mm body dimensions. This package is distinct from SOIC-14 and TSSOP-14 variants and is confirmed in the Ordering Information table and Package Dimensions drawing (Issue O).

Can MC74LCX14M replace MC74LCX04 in existing designs?

MC74LCX14M is pin- and function-compatible with MC74LCX04 but adds Schmitt-trigger inputs - meaning it can directly replace MC74LCX04 where hysteresis is beneficial (e.g., noise-prone environments), though it will not improve timing in purely digital paths. The truth table and pinout match exactly; only the input transfer characteristic differs due to hysteresis.

What is the typical input hysteresis voltage of MC74LCX14M at 3.0 V supply?

At VCC = 3.0 V, the MC74LCX14M exhibits a typical input hysteresis voltage (VH) of 1.2 V, calculated as VT+ (typ 2.2 V) minus VT− (typ 1.0 V). This value is explicitly listed in the DC Electrical Characteristics table and ensures reliable noise margins for signals with up to ±600 mV of superimposed interference.