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onsemi 74VHCT14AMTC
- Part No.:
- 74VHCT14AMTC
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHCT14AMTC.pdf
- Description:
- IC INVERTER 6CH 1-INP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
74VHCT14AMTC 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 hysteresis (VP = 2.1V, VN = 0.6V at VCC = 5.5V), 5.0ns typical propagation delay, ±25mA output drive, 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 74VHCT14AMTC datasheet, pinout, applications, or equivalent options, key selection criteria include input hysteresis voltage (0.4–1.5V), 5V supply compatibility, TSSOP-14 package footprint, and power-down protection on all I/O pins.
Technical Context
The 74VHCT14AMTC implements six independent CMOS Schmitt-trigger inverters using silicon-gate technology, each with asymmetric input thresholds enabling robust noise rejection on slow or noisy signals. Its VIH = 2.0V and VIL = 0.8V at TA = 25°C ensure reliable logic-level interpretation across voltage variations.
It supports mixed-voltage interfacing between 3V and 5V domains due to input tolerance up to 7.0V regardless of VCC state, and includes power-down protection that prevents damage when VCC = 0V while inputs/outputs are biased. All inputs require termination-floating is prohibited per datasheet Note 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures stable operation in standard 5V TTL-compatible systems with ±10% supply tolerance. |
| Propagation Delay | 5.0ns (typ.) at CL = 15pF - Enables use in high-speed digital timing paths up to ~100MHz edge-rate applications. |
| Hysteresis Voltage | 0.4V to 1.5V - Provides noise margin against EMI-induced glitches on analog-like inputs such as reset lines or sensor outputs. |
| Output Drive | ±25mA - Sufficient to directly drive LEDs, small relays, or multiple 74-series inputs without buffering. |
| Quiescent ICC | 2µA (max.) at TA = 25°C - Supports low-power standby modes in battery-backed or energy-sensitive embedded controllers. |
| Input Voltage Range | –0.5V to +7.0V - Allows safe interfacing to overvoltage sources (e.g., 12V sensors) without external clamping diodes. |
Pinout & Package
74VHCT14AMTC is housed in a 14-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm wide, with 0.65mm lead pitch and gull-wing terminations. Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Inverter Input (A1–A6) | CMOS Schmitt-trigger inputs accepting 0–7V; must be terminated HIGH or LOW-no floating allowed. |
| 2, 4, 6, 10, 12, 14 | Inverter Output (Y1–Y6) | Push-pull CMOS outputs capable of sourcing/sinking ±25mA; tolerate VCC = 0V during power-down. |
| 7 | GND | Ground reference for all logic and power domains; decoupling capacitor required near this pin. |
| 14 | VCC | Positive supply (4.5–5.5V); powers internal circuitry and defines logic HIGH threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Input hysteresis | 0.4–1.5V window ensures immunity to noise on slow edges (e.g., mechanical switch bounce or RC-filtered signals). |
| Power-down protection | Inputs and outputs withstand –0.5V to 7.0V even when VCC = 0V-enables hot-swap and battery-backup system safety. |
| Pin/function compatibility | Fully compatible with 74HCT14 pinout and logic behavior-allows drop-in replacement in legacy HCT designs. |
| Low dynamic noise | VOLP ≤ 1.0V limits ground bounce and crosstalk in dense PCB layouts with fast switching loads. |
Applications
| Industrial Sensor Interface | Microcontroller Reset Conditioning |
|---|---|
Use Scenario: Converting noisy, slow-rising analog sensor outputs (e.g., thermistor-based temperature monitors) into clean digital signals for PLC input modules. IC Role / Device Role / Timing Role: Schmitt-trigger inverter providing hysteresis-based signal cleanup and edge sharpening before digitization. Use Value: Eliminates false triggering caused by EMI or thermal drift, reducing firmware debounce overhead and improving system reliability. | Use Scenario: Debouncing and stabilizing manual reset buttons or power-fail detection circuits feeding microcontroller reset pins. IC Role / Device Role / Timing Role: Inverting buffer with hysteresis ensuring monotonic, glitch-free reset assertion/deassertion. Use Value: Prevents unintended MCU resets during brown-out or switch contact chatter-critical for deterministic boot behavior. |
| Legacy TTL System Upgrade | 5V Logic Level Translation |
Use Scenario: Replacing obsolete 74LS14 in aging industrial control panels requiring improved noise immunity and lower power. IC Role / Device Role / Timing Role: Direct functional and pin-compatible upgrade delivering identical logic function with enhanced DC/AC specs. Use Value: Extends product lifecycle without PCB redesign-reduces obsolescence risk and maintenance cost. | Use Scenario: Interfacing 3.3V FPGA I/O to 5V peripheral buses (e.g., EEPROM, display drivers) where level-shifting with hysteresis is needed. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe 3V-to-5V signal translation with noise margin. Use Value: Avoids dedicated level translators; simplifies BOM and layout while maintaining signal integrity across supply domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex Schmitt inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT14PW,118 (Nexperia) | TSSOP-14, same VCC range and pinout; slightly higher max ICC (40µA vs. 20µA) and longer tPD (15ns typ. at CL=50pF). | Lacks explicit power-down protection on inputs/outputs when VCC = 0V. | Preferred for cost-sensitive, non-hot-swap applications where ultra-low quiescent current is not critical. |
| SN74VHC14DR (Texas Instruments) | Same package; wider VCC range (2–5.5V); lower hysteresis (0.3–1.0V) and higher input capacitance (5pF vs. 2pF). | Supports dual-supply operation down to 2V but offers reduced noise margin in 5V-only systems. | Chosen when design requires flexible supply scaling or compatibility with 3.3V/5V hybrid logic families. |
Compared with 74VHCT14AMTC, the Nexperia 74HCT14PW offers lower cost but sacrifices power-down safety and speed, while TI's SN74VHC14DR trades hysteresis depth for supply flexibility-making the 74VHCT14AMTC optimal for robust 5V industrial signal conditioning with hot-swap resilience.
Availability
74VHCT14AMTC is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset conditioning, and legacy TTL system upgrades requiring stable component supply, long-term lifecycle support, and JEDEC-compliant TSSOP packaging.
Supply support for 74VHCT14AMTC 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, analog, sensor, and logic solutions for automotive, industrial, cloud, and medical applications.
The 74VHCT14AMTC belongs to ON Semiconductor's legacy logic portfolio, originally developed by Fairchild, and is engineered for high-noise environments in industrial automation, factory control, and instrumentation where signal integrity and supply resilience are critical.
FAQ
What is the maximum input voltage rating for the 74VHCT14AMTC?
The 74VHCT14AMTC supports DC input voltages from –0.5V to +7.0V regardless of VCC state, enabling direct connection to overvoltage sources like 12V sensors or open-collector signals without external protection components-this specification is guaranteed per Absolute Maximum Ratings table in the datasheet.
Does the 74VHCT14AMTC support operation at 3.3V supply?
No, the 74VHCT14AMTC is specified only for VCC = 4.5V to 5.5V. Its input thresholds (VIH = 2.0V, VIL = 0.8V) and hysteresis are optimized for 5V logic levels; operation below 4.5V is not characterized and may result in undefined output behavior or failure to meet timing specs.
Can unused inputs on the 74VHCT14AMTC be left floating?
No-unused inputs on the 74VHCT14AMTC must be tied HIGH or LOW per datasheet Note 4. Floating inputs cause increased ICC, potential oscillation, and unpredictable output states due to CMOS gate sensitivity; this is a mandatory design requirement, not a recommendation.
What is the purpose of power-down protection in the 74VHCT14AMTC?
Power-down protection in the 74VHCT14AMTC allows inputs and outputs to safely tolerate –0.5V to 7.0V even when VCC = 0V. This prevents latch-up or damage during hot-plug events, battery backup transitions, or partial power sequencing-ensuring system-level robustness in industrial and embedded applications.
Is the 74VHCT14AMTC pin-compatible with the 74HCT14 series?
Yes, the 74VHCT14AMTC is explicitly stated as pin and function compatible with the 74HCT14 family. Its pinout, logic behavior, and DC/AC electrical characteristics align with industry-standard 74HCT14 devices, enabling direct replacement in existing designs without layout changes.
74VHCT14AMTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74VHCT14AMTC FAQ
1.How can I place an order for 74VHCT14AMTC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT14AMTC 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 74VHCT14AMTC reliable?
The price and inventory of 74VHCT14AMTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT14AMTC is usually 5 days.
3.What payment methods are accepted for 74VHCT14AMTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT14AMTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT14AMTC?
74VHCT14AMTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT14AMTC 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 74VHCT14AMTC?
For technical support, including 74VHCT14AMTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT14AMTC requirements.
6.How does Aetrix verify that 74VHCT14AMTC is sourced from the original manufacturer or authorized distributors?
All 74VHCT14AMTC 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 74VHCT14AMTC meets industry standards.
7.What is the process for return or replacement of 74VHCT14AMTC?
All 74VHCT14AMTC units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT14AMTC, 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 74VHCT14AMTC part is unused and in its original packaging.
Return procedure for 74VHCT14AMTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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