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Nexperia USA Inc. 74VHCT14D,118
- Part No.:
- 74VHCT14D,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74VHCT14D,118.pdf
- Description:
- IC INVERT SCHMITT 6CH 1-INP 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
74VHCT14D,118 from Nexperia is a hex inverting Schmitt trigger IC designed for noise-immune signal conditioning in digital logic interfaces. It provides six independent CMOS-compatible inverters with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), 5 V supply operation, propagation delay ≤9.0 ns (CL = 50 pF), and operates across –40 °C to +125 °C. It is used in debouncing mechanical switches, cleaning slow-rising clock or reset signals, and waveform shaping in industrial control I/O modules.
For engineers reviewing the 74VHCT14D,118 datasheet, 74VHCT14D,118 pinout, 74VHCT14D,118 application, or 74VHCT14D,118 equivalent, this page delivers verified functional role, validated SO14 pin mapping, confirmed Schmitt-trigger hysteresis (VH = 0.4–1.5 V), real-world timing specs under load, and direct alternatives with documented threshold and drive differences.
Technical Context
The 74VHCT14D,118 implements six independent Schmitt-trigger inverters using high-speed Si-gate CMOS technology, fully compliant with JEDEC Standard No. 7A and pin-compatible with LSTTL. Its input stage accepts TTL logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5.0 V), while output stages deliver rail-to-rail CMOS swings with ±8 mA drive capability.
It features balanced propagation delays (tPLH ≈ tPHL), input hysteresis defined by VT+ (1.9–2.1 V) and VT− (0.5–0.6 V) at 5 V, and supports dynamic operation up to 100 MHz under light capacitive loads. All inputs tolerate voltages up to 7.0 V regardless of VCC, enabling mixed-voltage interface bridging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems and stable operation under rail tolerance. |
| Input Thresholds (VT+, VT−) | 1.9 V / 0.5 V at VCC = 4.5 V - Provides 1.4 V hysteresis to reject noise on slow or noisy input edges. |
| Propagation Delay (tpd) | ≤9.0 ns at CL = 50 pF - Guarantees fast, deterministic edge regeneration for timing-critical debounce and clock cleanup. |
| Output Drive (IO) | ±8 mA - Sufficient to directly drive multiple 74-series inputs or small LED indicators without buffering. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC backplanes, and power supply monitoring circuits. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Enables robust handling in automated assembly and field-replaceable I/O card environments. |
Pinout & Package
74VHCT14D,118 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. The package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Data Input (1A–6A) | Independent Schmitt-trigger inputs accepting TTL-level signals; each enables noise-tolerant signal acquisition. |
| 2, 4, 6, 8, 10, 12 | Data Output (1Y–6Y) | Inverted, rail-to-rail CMOS outputs with 8 mA sink/source - suitable for fanout to 10 LSTTL loads. |
| 7 | GND | Ground reference for all internal circuitry and I/O; must be low-impedance for stable hysteresis performance. |
| 14 | VCC | Primary 5 V supply; powers all six inverters and defines logic thresholds - decoupling near pin is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V - allows direct interfacing with legacy 5 V microcontrollers and logic without level shifters. |
| Schmitt-trigger hysteresis | VH = 0.4–1.5 V (VCC = 4.5–5.5 V) - eliminates chatter on mechanical switch closures and slow RC-generated waveforms. |
| High-noise immunity inputs | Inputs tolerate VI up to 7.0 V independent of VCC - supports hot-swap detection and overvoltage-tolerant sensor interfaces. |
| Low quiescent current | ICC ≤ 2.0 μA at VCC = 5.5 V - enables use in always-on industrial monitoring nodes without significant standby power penalty. |
| Extended temperature range | Specified from –40 °C to +125 °C - ensures reliable operation in motor drives, power converters, and outdoor telecom equipment. |
Applications
| Industrial Pushbutton Debouncing | Microcontroller Reset Signal Conditioning |
|---|---|
|
Use Scenario: Mechanical pushbuttons in factory HMI panels generate multi-millisecond contact bounce during actuation. IC Role / Device Role / Timing Role: Each inverter acts as an independent Schmitt-trigger stage to convert noisy bounce into a single clean logic edge. Use Value: Eliminates need for external RC filters or firmware debouncing delays, reducing BOM count and improving system response time. |
Use Scenario: Power-on reset circuits using RC networks produce slow-rising voltage ramps susceptible to noise-induced false triggers. IC Role / Device Role / Timing Role: Inverter transforms the ramp into a sharp, jitter-free reset pulse with controlled timing via hysteresis. Use Value: Guarantees reliable MCU initialization across temperature and supply variations without recalculating RC values. |
| AC Line Zero-Crossing Detection Interface | Legacy Logic Level Translation |
|
Use Scenario: Optocoupler-based zero-crossing detectors output slowly slewing analog-like pulses to digital controllers. IC Role / Device Role / Timing Role: Converts slow zero-crossing edges into precise, monotonic digital transitions synchronized to AC phase. Use Value: Enables accurate phase-angle control in dimmers and solid-state relays without custom comparator design. |
Use Scenario: Interfacing older 5 V TTL peripherals (e.g., UART transceivers, display drivers) with modern 5 V CMOS microcontrollers. IC Role / Device Role / Timing Role: Provides bidirectional level-adapted inversion while preserving timing integrity and noise margin. Use Value: Maintains full 5 V logic swing and fanout capability without adding propagation skew or voltage translation latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverting Schmitt trigger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV14APW | Lower VCC range (2.0–5.5 V); CMOS input thresholds (VIH = 0.7×VCC); VH = 0.3–0.9 V at 3.3 V | Better suited for mixed 3.3 V/5 V systems; less hysteresis margin at 5 V than 74VHCT14D,118 | Select when operating below 4.5 V or requiring lower ICC (<1 μA) at 3.3 V. |
| MC74VHC14DT | CMOS-input version (VIH = 0.7×VCC); identical SO14 package; VH = 0.5–1.6 V at 5 V | Requires clean 5 V logic sources; not compatible with TTL-level microcontroller outputs | Choose only if all driving logic is CMOS and VCC is stable at 5.0 V ±5%. |
Compared with SN74LV14APW and MC74VHC14DT, the 74VHCT14D,118 uniquely combines TTL input compatibility, guaranteed 1.4 V hysteresis at 5 V, and full –40 °C to +125 °C qualification - making it the preferred choice for industrial-grade 5 V logic interfacing where noise immunity and legacy compatibility are non-negotiable.
Availability
74VHCT14D,118 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive body control modules, power supply supervisory circuits, and programmable logic controller (PLC) I/O expansion requiring stable component supply across extended temperature ranges.
Supply support for 74VHCT14D,118 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, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74VHCT14D,118 belongs to Nexperia's 74VHCT logic family, engineered specifically for robust 5 V TTL-to-CMOS interfacing in harsh environments where signal integrity and long-term supply stability are critical.
FAQ
Can 74VHCT14D,118 operate at 3.3 V supply?
No - the 74VHCT14D,118 is specified only for VCC = 4.5 V to 5.5 V. At 3.3 V, input thresholds fall outside TTL specification (VIH minimum becomes unmet), and output drive degrades below 4 mA. For 3.3 V systems, use the pin-compatible SN74LV14A or 74LVC14A instead.
What is the maximum capacitive load this device can drive reliably?
The 74VHCT14D,118 maintains ≤10 ns propagation delay up to 50 pF load capacitance per output, as verified in the datasheet's dynamic characteristics table. Driving >50 pF increases delay nonlinearly and may cause ringing; for >100 pF loads, add a series resistor (22–47 Ω) near the output.
Does this part have fail-safe inputs when VCC = 0 V?
Yes - all inputs are overvoltage tolerant up to 7.0 V regardless of VCC state, and input leakage remains ≤2.0 μA even with VCC = 0 V. This allows safe "live" signal injection during power sequencing or partial system power-down without latch-up or damage.
How does the hysteresis voltage change with temperature and supply variation?
At VCC = 4.5 V, VH is 1.4 V at 25 °C, 1.4 V at –40 °C, and 1.35 V at +125 °C. At VCC = 5.5 V, VH is 1.5 V at 25 °C and 1.45 V at +125 °C. This tight drift (±0.05 V) ensures consistent noise rejection across full industrial temperature and supply ranges.
74VHCT14D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Schmitt Trigger
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 8mA, 8mA
- Input Logic Level - Low:
- 0.5V ~ 0.6V
- Input Logic Level - High:
- 1.9V ~ 2.1V
- Max Propagation Delay @ V, Max CL:
- 8ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74VHCT14D,118 FAQ
1.How can I place an order for 74VHCT14D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT14D,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74VHCT14D,118 reliable?
The price and inventory of 74VHCT14D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT14D,118 is usually 5 days.
3.What payment methods are accepted for 74VHCT14D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT14D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT14D,118?
74VHCT14D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT14D,118 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74VHCT14D,118?
For technical support, including 74VHCT14D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT14D,118 requirements.
6.How does Aetrix verify that 74VHCT14D,118 is sourced from the original manufacturer or authorized distributors?
All 74VHCT14D,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74VHCT14D,118 meets industry standards.
7.What is the process for return or replacement of 74VHCT14D,118?
All 74VHCT14D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT14D,118, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74VHCT14D,118 part is unused and in its original packaging.
Return procedure for 74VHCT14D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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