NXP Semiconductors 74HCT14N,652

Overview

74HCT14N,652 from Nexperia is a hex inverting Schmitt trigger IC designed for digital signal conditioning in TTL-level interfacing applications. It features six independent Schmitt-trigger inverters with hysteresis (V_H = 0.4 V min at V_CC = 4.5 V), operates from 4.5 V to 5.5 V, delivers ±4.0 mA output drive, and supports ambient temperatures from –40 °C to +125 °C - enabling robust noise-immune waveform shaping in industrial control inputs.

For engineers reviewing the 74HCT14N,652 datasheet, 74HCT14N,652 pinout, 74HCT14N,652 application, or 74HCT14N,652 equivalent, this device is selected for its precise TTL-compatible input thresholds (V_T+ = 1.2 V min, V_T− = 0.5 V max at V_CC = 4.5 V), low propagation delay (t_pd = 20 ns typ at V_CC = 4.5 V), and guaranteed latch-up immunity (>100 mA per JESD78 Class II Level B).

Technical Context

The 74HCT14N,652 implements six independent CMOS Schmitt-trigger inverter stages with TTL-compatible input voltage thresholds, enabling reliable interfacing with legacy TTL logic while maintaining CMOS power efficiency. Its input clamp diodes allow safe operation with input voltages exceeding V_CC when used with current-limiting resistors.

Each inverter provides sharp transition outputs with hysteresis of 0.4 V minimum at 4.5 V supply, eliminating jitter on slow-rising signals. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards and meets ANSI/ESDA/JEDEC JS-001 Class 2 HBM ESD rating (>2000 V).

Key Specifications

Pinout & Package

74HCT14N,652 is supplied in the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm pitch, 8.75 mm × 3.9 mm footprint, 1.75 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT14D,653 and SN74HCT14DR, the 74HCT14N,652 offers the lowest typical propagation delay and best input threshold consistency across temperature, making it optimal for timing-critical waveform generation and high-noise industrial sensing where deterministic edge placement is essential.

Availability

74HCT14N,652 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT14N,652 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT14N,652 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless interoperability between CMOS and legacy TTL systems while delivering robust ESD performance and extended temperature operation.

FAQ

What is the maximum supply voltage for 74HCT14N,652?

The absolute maximum supply voltage for 74HCT14N,652 is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operating outside this range risks violating input/output voltage limits, increasing ICC leakage, and compromising latch-up immunity. For sustained reliability in production, maintain V_CC within 4.75 V to 5.25 V with proper decoupling.

Does 74HCT14N,652 support 3.3 V logic inputs?

No - 74HCT14N,652 is optimized for 5 V TTL-level interfacing and does not guarantee correct switching with 3.3 V inputs. Its input thresholds (V_T+ ≥ 1.2 V, V_T− ≤ 1.2 V at V_CC = 4.5 V) require input high signals ≥ 2.0 V for reliable recognition. For 3.3 V systems, use 74HC14 or 74LVC14 instead.

Can 74HCT14N,652 drive an LED directly?

Yes - each output of 74HCT14N,652 can sink or source up to 4.0 mA at V_CC = 4.5 V, sufficient to drive low-current indicator LEDs (e.g., 2 mA @ 1.8 V forward voltage) with a series resistor. However, avoid simultaneous full-load drive on more than two outputs to prevent excessive total ICC and thermal stress in the SO14 package.

Is 74HCT14N,652 pin-compatible with 74HC14N?

Yes - 74HCT14N,652 and 74HC14N share identical SO14 pinout, pin functions, and package dimensions. However, they differ electrically: 74HC14N uses CMOS thresholds (V_T+ ≈ 0.5×V_CC), while 74HCT14N,652 uses fixed TTL thresholds. Interchange requires verification of input signal voltage levels and timing margins.

What is the purpose of the input clamp diodes in 74HCT14N,652?

The integrated input clamp diodes in 74HCT14N,652 protect against overvoltage transients by shunting currents > ±20 mA to V_CC or GND. When used with a series current-limiting resistor (e.g., 10 kΩ), they enable safe interfacing to signals up to 12 V - ideal for industrial sensors, relay contacts, or open-collector outputs without external protection components.