STMicroelectronics M74HC14YRM13TR

Overview

M74HC14YRM13TR from STMicroelectronics is a high-speed CMOS hex Schmitt inverter with 20% V_CC input hysteresis, designed for noise-immune signal conditioning in automotive-grade digital interfaces. It operates from 2 V to 6 V, delivers symmetrical 4 mA output drive (I_OL/|I_OH|), features 12 ns typical propagation delay at 6 V, and supports -40 °C to +125 °C operation in SO14 package.

For engineers reviewing the M74HC14YRM13TR datasheet, M74HC14YRM13TR pinout, M74HC14YRM13TR application, or M74HC14YRM13TR equivalent, key selection criteria include hysteresis voltage (0.8–1.7 V at 6 V), ESD robustness (2 kV HBM), automotive qualification per AEC-Q100, and compatibility with legacy 74-series logic timing and footprint.

Technical Context

The M74HC14YRM13TR implements six independent Schmitt-trigger inverters using silicon gate C2MOS technology, each with precisely defined hysteresis thresholds (V_t+ = 3.0–4.2 V, V_t− = 1.5–2.6 V at V_CC = 6 V) enabling reliable recovery of slow-rising/falling signals. Its balanced t_PLH/t_PHL delays (12 ns typ. at 6 V) and low 1 μA max I_CC support stable timing in battery-sensitive and noise-prone environments.

All inputs integrate protection against static discharge (CDM: 1 kV, HBM: 2 kV, MM: 200 V) and transient overvoltage, while outputs maintain symmetrical impedance and rail-to-rail swing under 4 mA load-critical for interfacing with mixed-voltage logic domains in automotive body control modules and sensor signal chains.

Key Specifications

Pinout & Package

Supplied in SO14 (Small Outline 14-pin) package per ECOPACK® environmental compliance, with 1.27 mm pitch, 8.55–8.75 mm body length, and 3.80–4.00 mm width. Pin 7 is GND; Pin 14 is V_CC; Inputs (1A–6A) and outputs (1Y–6Y) are arranged in alternating sequence across both sides.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC14DR and MC74HC14ADTR2G, the M74HC14YRM13TR uniquely combines SO14 mechanical compatibility with full AEC-Q100 Grade 0 qualification-making it the only choice for high-reliability automotive applications requiring proven solder-joint integrity and extended temperature cycling performance in legacy-compatible footprints.

Availability

M74HC14YRM13TR is available at Aetrix Electronics and suitable for automotive body control modules, industrial encoder interfaces, motor feedback circuits, and legacy bus receiver designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M74HC14YRM13TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, power, and microcontroller solutions with vertical manufacturing capabilities.

The M74HC14 belongs to ST's high-reliability HC logic family, engineered specifically for automotive signal conditioning where noise immunity, wide voltage tolerance, and AEC-Q100 compliance are mandatory-not merely desirable.

FAQ

What is the maximum input frequency supported by M74HC14YRM13TR?

The device does not specify a maximum clock frequency, but AC characteristics show t_PLH/t_PHL ≤32 ns (max) over full temperature range at V_CC = 6 V. With 50 pF load and 6 ns input rise/fall, it reliably handles repetitive signals up to ~15 MHz-limited by propagation delay and transition time, not internal architecture.

Can M74HC14YRM13TR operate at 3.3 V supply?

Yes. The specified V_CC operating range is 2 V to 6 V. At 3.3 V, V_t+ ≈ 1.8 V and V_t− ≈ 1.2 V (typ.), providing 600 mV hysteresis-sufficient for noise rejection in 3.3 V systems such as infotainment microcontrollers and sensor hubs.

Is the SO14 package RoHS and REACH compliant?

Yes. The M74HC14YRM13TR uses ST's ECOPACK®-compliant SO14 package, fully conforming to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound.

Does this part support mixed-voltage interfacing between 5 V and 3.3 V logic?

Yes-with constraints. Its 2–6 V V_CC range allows direct 3.3 V operation, and inputs tolerate VI = 0 to V_CC, so 5 V-tolerant inputs are not provided. To interface 5 V signals, an external resistive divider or level-shifter is required to keep VI ≤ V_CC.