74HC7014D - Hex Non-Inverting Precision Schmitt-Trigger | Nexperia
Артикул: 74HC7014D ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0.65 | $0,65 |
| 10 | $0.58 | $5,80 |
| 100 | $0.49 | $49,00 |
| 500 | $0.42 | $210,00 |
| 1.000 | $0.36 | $360,00 |
74HC7014D Обзор
A Schmitt trigger is a comparator-based input stage that uses two distinct threshold voltages—one for rising edges (V_T+) and one for falling edges (V_T−)—producing a hysteresis band that prevents oscillation on slow or noisy input transitions. In the 74HC7014, these trigger levels are precisely defined at 0.55 × V_CC (V_T−) and 0.65 × V_CC (V_T+), yielding a tight 10% hysteresis window centred on V_CC/2. This precision distinguishes the 74HC7014 from general-purpose 74HC inverters (74HC04) and gates, whose thresholds vary more widely with V_CC and temperature.
Key features of the 74HC7014D include high-speed Si-gate CMOS construction, low power dissipation typical of 74HC family logic, full push-pull totem-pole outputs capable of sourcing and sinking symmetric load current, and the JEDEC 7A-specified DC characteristics that guarantee interoperability with other HC-family devices. The device is pin-compatible with the 74HC04 hex inverter family footprint (14-SO/SOIC-14) but offers non-inverting transfer function with defined hysteresis.
Typical applications include signal conditioning for slowly-rising sensor or mechanical-switch inputs, line receivers in noisy industrial environments, oscillator circuits (the Schmitt trigger hysteresis is the core element of relaxation oscillators), debouncing of mechanical switch contacts, and waveform shapers for clock-recovery or threshold-detection circuits. Because the trigger band tracks V_CC proportionally, the 74HC7014 also functions well as a voltage-level detector when V_CC is used as the reference.
When designing with this device, observe standard CMOS handling practices (ESD protection) and ensure output loading stays within the standard HC output capability (typically ±4 mA at 6 V). For automotive or extended-temperature applications the Q100/J version is available in the same SO-14 package, providing pin-compatible migration without PCB changes.
Аналоги без доработки для 74HC7014D — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
74HC7014D,118
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
74HC7014D-Q100J
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
SN74HC7014DR
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
M74HC7014
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
TC74HC7014
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
74HC7014D Максимальные параметры и электрические характеристики
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 6 |
| Bits per Element | 1 |
| Input Type | Schmitt Trigger (precision) |
| Тип выхода | Push-Pull (totem-pole) |
| Operating Voltage (Vcc) | 3 V to 6 V |
| V_T+ Threshold | 0.65 × Vcc (typ) |
| V_T- Threshold | 0.55 × Vcc (typ) |
| Hysteresis Window | 0.10 × Vcc (typ) |
| Logic Family | 74HC (High-Speed Si-gate CMOS) |
| JEDEC Compliance | JEDEC standard no. 7A |
| Категория | SSI (Small-Scale Integration) |
| Корпус | 14-SO (SOT108, SOIC-14) |
| Число выводов | 14 |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
| Рабочая температура | -40 °C to +125 °C (industrial) |
Конфигурация выводов 74HC7014D
| Контакт 1 | 1A — Input of buffer 1 |
| Контакт 2 | 1Y — Output of buffer 1 |
| Контакт 3 | 2A — Input of buffer 2 |
| Контакт 4 | 2Y — Output of buffer 2 |
| Контакт 5 | 3A — Input of buffer 3 |
| Контакт 6 | 3Y — Output of buffer 3 |
| Контакт 7 | GND — Ground (0 V) |
| Контакт 8 | 4Y — Output of buffer 4 |
| Контакт 9 | 4A — Input of buffer 4 |
| Контакт 10 | 5Y — Output of buffer 5 |
| Контакт 11 | 5A — Input of buffer 5 |
| Контакт 12 | 6Y — Output of buffer 6 |
| Контакт 13 | 6A — Input of buffer 6 |
| Контакт 14 | Vcc — Positive supply voltage (3 V to 6 V) |
Типичное применение
74HC7014D подходит для 6 применениеs: Mechanical Switch Debouncing, Relaxation Oscillator for Clock Generation, Industrial Line Receiver / Signal Conditioning, Threshold Voltage Detector, Waveform Shaper / Edge Regenerator, Automotive Switch and Sensor Interface.
Mechanical Switch Debouncing
The 74HC7014D is well suited to debouncing mechanical switch and relay contacts because its precision Schmitt-trigger input stage rejects the bounce-induced multiple edge transitions that would confuse a standard CMOS gate. With V_T+ = 0.65 × V_CC and V_T− = 0.55 × V_CC, the device sees a clean logic transition only after the contact settles well above or below the threshold window. A typical circuit places a 10 kΩ pull-up to V_CC and a 100 nF capacitor across the switch to slow the rise time into the hysteresis band, then feeds the conditioned signal into one of the six buffer channels. The non-inverting output preserves the switch polarity for downstream logic. Unlike a 74HC04 inverter, no inversion stage is needed, simplifying PCB layout in human-interface panels, control consoles and instrument front panels.
Рекомендуется
Relaxation Oscillator for Clock Generation
The 74HC7014D's precisely defined Schmitt-trigger hysteresis window of 0.10 × V_CC makes it an excellent building block for low-cost RC relaxation oscillators used in clock-recovery, blink/timer and watchdog circuits. A typical configuration uses one buffer channel with an RC network (R to V_CC, C to GND) feeding back from output to input; the device then switches state every time the capacitor voltage crosses V_T+ or V_T−, producing a near-symmetric square wave with frequency f ≈ 1 / (1.4 × R × C). The six independent channels can be paralleled to drive multiple loads or used to generate multiple phases. Compared with a 555 timer the 74HC7014D oscillator is smaller, lower-power, and synchronous with the logic family, simplifying integration into digital control boards.
Рекомендуется
Industrial Line Receiver / Signal Conditioning
In factory-automation backplanes and noisy sensor interfaces the 74HC7014D functions as a robust line receiver that cleans up slow or attenuated logic edges before they reach a microcontroller or PLC input. The 0.10 × V_CC hysteresis band at 5 V operation (≈ 500 mV) easily rejects 24 V industrial noise spikes after a resistive divider, while the push-pull output provides standard CMOS drive to downstream HC-family logic. A typical interface places an RC low-pass filter (R = 10 kΩ, C = 1 nF) at the input to limit bandwidth, then feeds the conditioned signal into the 74HC7014D for hysteresis regeneration. The non-inverting transfer function is convenient when monitoring active-high sensor flags such as proximity-detector outputs.
Рекомендуется
Threshold Voltage Detector
Because the 74HC7014D Schmitt-trigger thresholds scale proportionally with V_CC, the device naturally functions as a voltage-level detector when V_CC is used as the reference. Tie V_CC to a regulated reference (for example 3.3 V from a supervisor) and the input is then compared against 0.55 × V_CC ≈ 1.82 V (low-to-high) and 0.65 × V_CC ≈ 2.15 V (high-to-low). This is useful for monitoring battery voltage, USB VBUS presence, or sensor supply health in portable and IoT applications. The six channels can monitor up to six independent rails simultaneously, each with its own RC filter for noise immunity, providing a simple multi-channel voltage supervisor without a dedicated monitor IC.
Рекомендуется
Waveform Shaper / Edge Regenerator
Slow analog waveforms from sensors (such as thermistor dividers, photodiode amplifiers or RC differentiators) often need to be converted into clean logic edges before they reach a microcontroller counter or interrupt input. The 74HC7014D performs this function in a single stage: the Schmitt-trigger input defines a precise threshold crossing, and the push-pull output delivers a fast-edged (sub-10 ns) logic signal. A typical waveform-shaper circuit places a series capacitor (100 nF) at the input for AC coupling and a pull-down resistor to GND, then feeds the shaped signal into the 74HC7014D. Because the device has six channels it can also be used for multi-phase signal conditioning in three-phase motor control or quadrature decoding circuits.
Рекомендуется
Automotive Switch and Sensor Interface
In automotive body-control modules, instrument clusters and HVAC panels the 74HC7014D (or its AEC-Q100-qualified -Q100 variant) interfaces with mechanical switches, Hall sensors and other noisy automotive signal sources. The 0.10 × V_CC hysteresis provides excellent immunity to automotive transients (load-dump, cranking, EMI) and the push-pull output drives standard 5 V logic cleanly. A typical application places ESD protection (TVS diode) and a series resistor at the input, then buffers through one 74HC7014 channel before feeding the microcontroller GPIO. For under-the-hood applications the -Q100 variant guarantees operation from -40 °C to +125 °C with AEC-Q100 qualification, while the standard industrial part is sufficient for cabin electronics.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для 74HC7014D — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 74HC7014D,118 | 74HC7014D-Q100J | SN74HC7014DR | M74HC7014 | TC74HC7014 |
|---|---|---|---|---|---|---|
| Brand | Nexperia (formerly NXP/Philips) | Nexperia | Nexperia | Texas Instruments | STMicroelectronics | Toshiba |
| Package | SO-14 (SOT108) | SO-14 - same | SO-14 - same | SOIC-14 - same | SO-14 - same | SOIC-14 - same |
| Logic Function | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer | Hex Non-Inverting Buffer |
| V_T+ Threshold | 0.65 × Vcc | 0.65 × Vcc | 0.65 × Vcc | 0.65 × Vcc | 0.65 × Vcc | 0.65 × Vcc |
| V_T- Threshold | 0.55 × Vcc | 0.55 × Vcc | 0.55 × Vcc | 0.55 × Vcc | 0.55 × Vcc | 0.55 × Vcc |
| Operating Voltage | 3 V to 6 V | 3 V to 6 V | 3 V to 6 V | 2 V to 6 V (TI extended) | 2 V to 6 V (ST extended) | 2 V to 6 V (Toshiba extended) |
| JEDEC Compliance | JEDEC 7A | JEDEC 7A | JEDEC 7A + AEC-Q100 | JEDEC 7A compatible | JEDEC 7A compatible | JEDEC 7A compatible |
| Output Drive | Standard HC (push-pull) | Standard HC | Standard HC | Standard HC | Standard HC | Standard HC |
| Automotive Grade | No (industrial) | No | Yes (AEC-Q100) | No (TI -Q1 variant exists) | No | No |
Ключевые отличия
- Precision-defined Schmitt-trigger hysteresis window (против 74HC04 standard hex inverter)
- Non-inverting transfer function (против 74HC14 hex inverting Schmitt-trigger)
- AEC-Q100 qualified option in same footprint (против Standard industrial 74HC7014D)
Заметки по проектированию
The 74HC7014D operates from a 3 V to 6 V V_CC supply with standard 74HC quiescent current (typically < 20 µA total when inputs are static). Decouple V_CC with a 100 nF ceramic capacitor placed within 5 mm of the V_CC pin (pin 14) and a 10 µF bulk capacitor at the board supply entry. The push-pull outputs deliver ±4 mA typical at 5 V, so high-capacitance loads (> 100 pF) should be series-damped with 33 Ω to limit ground-bounce and dynamic V_CC sag.
Do not leave inputs floating — a floating CMOS input can drift into the linear region and cause both the N-channel and P-channel output stages to conduct simultaneously, drawing large supply current. Tie unused inputs to V_CC or GND through a 10 kΩ resistor, especially when the device is in standby. Also note that the 74HC7014D is non-inverting: unlike the popular 74HC14 hex inverter, the output follows the input polarity, so downstream logic must accommodate active-high signalling.
When using the 74HC7014D as an oscillator, place the RC network close to the input pin to minimise stray capacitance, and keep the feedback trace short (under 10 mm) to avoid parasitic coupling. For high-noise environments add a small series resistor (47 Ω to 100 Ω) at the output to damp transmission-line ringing when driving long PCB traces. The 0.10 × V_CC hysteresis window (~ 500 mV at 5 V) provides good noise margin, but very fast noise spikes above 50 MHz can still couple through package parasitics.
Информация о соответствии
RoHS and REACH compliant per Nexperia product page. Standard industrial grade; choose -Q100J variant for AEC-Q100 automotive qualification.
