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onsemi 74VHCT14AN
- Part No.:
- 74VHCT14AN
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
74VHCT14AN.pdf
- Description:
- IC INVERT SCHMITT 6CH 1IN 14MDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
74VHCT14AN from ON Semiconductor is a hex Schmitt-trigger inverter IC designed for noise-immune signal conditioning in 5V digital systems. It features six independent inverters with 5.0ns typical propagation delay, ±25mA output drive, 2.0V/0.8V input thresholds, and operates across –40°C to +85°C. It enables clean edge regeneration in slow-rising clock or sensor inputs in industrial control interfaces.
For engineers reviewing the 74VHCT14AN datasheet, pinout, applications, or equivalent options, key selection criteria include hysteresis voltage (0.4–1.5V), power-down protection on all I/O, 2µA max quiescent ICC at 5.5V, and compatibility with 3V-to-5V mixed-supply interfacing.
Technical Context
The 74VHCT14AN implements silicon-gate CMOS Schmitt-trigger logic with built-in hysteresis per inverter stage, enabling reliable conversion of noisy or slowly transitioning analog-like signals into clean TTL-compatible digital outputs. Each gate has independently defined positive (VP = 1.9–2.1V) and negative (VN = 0.5–0.6V) input thresholds under 4.5–5.5V VCC.
Input protection circuitry allows safe application of 0–7V signals regardless of VCC state-including VCC = 0V-making it suitable for hot-swap and battery-backup system interfaces. Outputs support 8mA sink/source while maintaining VOL ≤ 0.44V and VOH ≥ 3.80V at full load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - Ensures stable operation in standard 5V logic rails with ±10% tolerance. |
| Propagation Delay | 5.0ns (typ.) at CL = 15pF - Enables use in high-speed timing-critical signal cleanup up to ~100MHz edge rates. |
| Hysteresis Voltage | 0.4V to 1.5V - Provides robust noise margin against EMI-induced glitches on slow input edges. |
| Output Drive | ±8mA - Sufficient to directly drive multiple 74-series TTL inputs or small LEDs without buffering. |
| Quiescent ICC | 2µA (max) at TA = 25°C - Supports low-power standby modes in battery-backed or energy-sensitive systems. |
| Input Thresholds | VIH = 2.0V, VIL = 0.8V - Guarantees reliable switching even with degraded or RC-filtered signals. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade deployment in uncontrolled ambient environments. |
Pinout & Package
74VHCT14AN is supplied in a 14-lead PDIP (Plastic Dual In-line Package) with 0.300" body width, lead finish matte tin, and JEDEC-standard pinout. Pin 1 is marked by a notch or dot; package meets RoHS and JEDEC J-STD-020B reflow requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Inverter Input (A1–A6) | CMOS Schmitt-trigger inputs accepting 0–7V; internally protected against overvoltage and floating states. |
| 2, 4, 6, 8, 10, 12 | Inverter Output (Y1–Y6) | Push-pull CMOS outputs capable of sourcing/sinking 8mA; include power-down protection when VCC = 0V. |
| 7 | GND | Ground reference for all logic and I/O; must be connected to system common return path. |
| 14 | VCC | Positive supply rail (4.5–5.5V); powers internal logic and output stages; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed propagation | 5.0ns typical tPD enables precise timing alignment in clock distribution and debounce circuits. |
| Input hysteresis | 0.4–1.5V window eliminates chatter on slow or noisy inputs such as mechanical switch closures or sensor outputs. |
| Power-down protection | Inputs and outputs remain protected and non-damaging even when VCC = 0V - critical for hot-plug and backup power scenarios. |
| Low dynamic noise | VOLP ≤ 1.0V ensures minimal ground bounce during simultaneous switching, improving signal integrity in dense layouts. |
| 3V/5V interface capability | Accepts 3V logic levels while operating at 5V VCC - simplifies level translation between mixed-voltage subsystems. |
Applications
| Industrial Sensor Interface | Microcontroller Input Conditioning |
|---|---|
|
Use Scenario: Converting slow-rising analog sensor outputs (e.g., thermistor divider, proximity switch) into clean digital signals for PLC input modules. IC Role / Device Role / Timing Role: Signal conditioner and edge regenerator - transforms noisy or sluggish transitions into jitter-free square waves. Use Value: Eliminates need for external RC filtering and software debouncing; reduces firmware overhead and improves real-time response. |
Use Scenario: Debouncing pushbutton or rotary encoder inputs connected to GPIO pins of an ARM Cortex-M microcontroller. IC Role / Device Role / Timing Role: Hardware-level Schmitt trigger - provides deterministic, glitch-free logic-level conversion independent of CPU timing. Use Value: Prevents false interrupts and spurious state changes; supports direct interrupt-driven input handling without polling delays. |
| Legacy System Bus Isolation | Crystal Oscillator Buffering |
|
Use Scenario: Interfacing legacy 5V TTL peripherals (e.g., parallel port devices, stepper motor drivers) with modern 3.3V FPGA I/O banks. IC Role / Device Role / Timing Role: Level-shifting buffer with hysteresis - accepts 3V logic swings while driving 5V loads with noise immunity. Use Value: Avoids dedicated level translators; maintains signal integrity across voltage domains without added propagation skew. |
Use Scenario: Buffering fundamental-mode quartz crystal oscillator outputs before distribution to multiple clock domains in embedded controllers. IC Role / Device Role / Timing Role: Low-jitter inverter buffer - reshapes sine-wave oscillator output into sharp-edged CMOS clock with controlled rise/fall times. Use Value: Reduces clock skew and jitter accumulation; prevents waveform degradation due to capacitive loading or long traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schmitt-trigger inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT14N | Same pinout and function, but lower hysteresis (VP/VN ≈ 1.8V/0.6V) and higher ICC (4µA max); no power-down protection on outputs. | Lacks VCC = 0V output protection - unsuitable for hot-swap or dual-supply systems where output pins may be driven while unpowered. | Select SN74HCT14N only if cost sensitivity outweighs need for robustness in mixed-power or field-serviceable designs. |
| MC74VHC14N | Wider VCC range (2–5.5V), higher speed (tPD = 3.5ns typ.), but no input overvoltage tolerance beyond VCC+0.5V; no power-down protection. | Not safe for interfacing >5.5V signals or hot-swapped backplanes; requires strict adherence to VCC-referenced input limits. | Choose MC74VHC14N when operating below 5V or requiring sub-4ns delay, but verify all input sources stay within VCC + 0.5V. |
Compared with SN74HCT14N and MC74VHC14N, the 74VHCT14AN uniquely combines 0–7V input tolerance, VCC = 0V-safe I/O, and guaranteed hysteresis over full temperature - making it the preferred choice for industrial field I/O and mixed-supply reliability-critical designs.
Availability
74VHCT14AN is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller input conditioning, legacy bus isolation, and crystal oscillator buffering requiring stable component supply and long-term lifecycle assurance.
Supply support for 74VHCT14AN 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 is a global semiconductor manufacturer specializing in energy-efficient power management, signal processing, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The 74VHCT14AN belongs to ON Semiconductor's legacy VHCT logic family, engineered specifically for robust 5V digital interfacing with enhanced noise immunity and mixed-voltage interoperability in harsh industrial environments.
FAQ
What is the maximum input voltage rating for the 74VHCT14AN?
The 74VHCT14AN supports DC input voltages from –0.5V to +7.0V regardless of VCC state, including operation with VCC = 0V. This overvoltage tolerance enables safe interfacing with higher-voltage sensors or legacy 7V logic families without external clamping diodes or resistors.
Does the 74VHCT14AN support hot-swap applications?
Yes - the 74VHCT14AN includes power-down protection on all inputs and outputs, allowing safe connection/disconnection while VCC is unpowered. This makes the 74VHCT14AN suitable for hot-plug I/O modules, battery-backed subsystems, and field-replaceable units where back-driving is possible.
Is the 74VHCT14AN pin-compatible with the standard 74HCT14?
Yes - the 74VHCT14AN is pin- and function-compatible with the 74HCT14, sharing identical 14-pin DIP layout and truth table. However, the 74VHCT14AN adds higher noise immunity (VIH/VIL = 2.0V/0.8V vs. 2.0V/0.8V), tighter hysteresis control, and superior input overvoltage protection.
What is the minimum hysteresis voltage specified for the 74VHCT14AN?
The 74VHCT14AN guarantees a minimum hysteresis voltage (VH) of 0.4V across its full operating temperature range (–40°C to +85°C) and supply voltage range (4.5–5.5V). This ensures consistent noise rejection even under worst-case thermal and voltage conditions.
Can the 74VHCT14AN be used to buffer crystal oscillator outputs?
Yes - the 74VHCT14AN is commonly used to buffer fundamental-mode crystal oscillator outputs due to its fast propagation delay (5.0ns typ.), low output impedance, and ability to drive moderate capacitive loads. Its Schmitt-trigger input also suppresses amplitude variations in oscillator waveforms, delivering clean CMOS-level clocks.
74VHCT14AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHCT
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 9.6ns @ 5V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-MDIP
74VHCT14AN FAQ
1.How can I place an order for 74VHCT14AN through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT14AN 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 74VHCT14AN reliable?
The price and inventory of 74VHCT14AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT14AN is usually 5 days.
3.What payment methods are accepted for 74VHCT14AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT14AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT14AN?
74VHCT14AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT14AN 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 74VHCT14AN?
For technical support, including 74VHCT14AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT14AN requirements.
6.How does Aetrix verify that 74VHCT14AN is sourced from the original manufacturer or authorized distributors?
All 74VHCT14AN 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 74VHCT14AN meets industry standards.
7.What is the process for return or replacement of 74VHCT14AN?
All 74VHCT14AN units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT14AN, 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 74VHCT14AN part is unused and in its original packaging.
Return procedure for 74VHCT14AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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