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onsemi 74VHCT14AMX
- Part No.:
- 74VHCT14AMX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74VHCT14AMX.pdf
- Description:
- IC INVERT SCHMITT 6CH 1IN 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,579
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Product details
Overview
74VHCT14AMX from ON Semiconductor is a hex Schmitt-trigger inverter IC designed for signal conditioning in mixed-voltage digital systems. It provides six independent hysteresis inverters with 5.0 ns typical propagation delay, 2.0 V VIH and 0.8 V VIL thresholds, and operates across 4.5–5.5 V supply while supporting 3V-to-5V interfacing.
For engineers reviewing the 74VHCT14AMX datasheet, pinout, applications, or equivalent options, key selection considerations include Schmitt-trigger noise immunity, power-down protection on all I/O, low 2 µA max ICC quiescent current, and compatibility with 74HCT14 logic families.
Technical Context
The 74VHCT14AMX implements six independent CMOS Schmitt-trigger inverters using silicon gate technology, each converting slow-rising/falling input signals into clean, jitter-free digital outputs via built-in hysteresis (0.4–1.5 V). Input protection allows safe operation with 0–7 V applied regardless of VCC state.
It supports dual-supply system interfacing (e.g., battery backup) due to rail-to-rail input tolerance and output capability down to VCC = 0 V. All inputs feature power-down protection, and outputs are rated for ±25 mA DC drive with defined VOL/VOH under 8 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation in standard 5 V TTL-compatible systems with ±10% tolerance. |
| Propagation Delay | 5.0 ns (typ.) at CL = 15 pF - Enables high-speed signal edge sharpening in clock/data recovery paths. |
| Hysteresis Voltage | 0.4–1.5 V - Provides robust noise rejection against EMI or crosstalk in noisy industrial environments. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - Guarantees reliable logic-level recognition across temperature (–40°C to +85°C). |
| Quiescent Current | 2 µA (max) at TA = 25°C - Supports ultra-low-power standby modes in battery-operated devices. |
| Output Drive | ±8 mA - Sufficient to directly drive multiple 74-series inputs or small LEDs without external buffers. |
| Input Protection | –0.5 V to +7.0 V tolerance - Allows safe hot-plug or level-shifting use without external clamping diodes. |
Pinout & Package
74VHCT14AMX is supplied in a 14-lead SOIC (JEDEC MS-012, 0.150" narrow body), with standard dual-in-line pin spacing and gull-wing leads compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Inverter Input (A1–A6) | Accepts slow or noisy digital signals; Schmitt-trigger action ensures clean transitions. |
| 2, 4, 6, 10, 12, 14 | Inverter Output (Y1–Y6) | Delivers sharp-edged, rail-swing CMOS outputs with defined VOH/VOL under load. |
| 7 | GND | Ground reference for all internal circuitry and I/O; must be low-impedance for noise immunity. |
| 14 | VCC | Positive supply (4.5–5.5 V); powers all six inverters and enables input/output protection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| High noise immunity | VIH = 2.0 V / VIL = 0.8 V with 0.4–1.5 V hysteresis - suppresses false triggering from EMI or ground bounce. |
| Power-down protection | Inputs and outputs tolerate –0.5 V to +7.0 V with VCC = 0 V - prevents latch-up during power sequencing. |
| Low dynamic noise | VOLP ≤ 1.0 V (CL = 50 pF) - minimizes switching-induced supply rail disturbance in dense PCB layouts. |
| PIN- and function-compatible | Drop-in replacement for 74HCT14 - enables legacy design upgrades without layout changes. |
| Ultra-low static power | ICC ≤ 2 µA at 25°C - extends battery life in always-on sensor nodes or watchdog circuits. |
Applications
| Industrial Sensor Interface | Microcontroller Reset Conditioning |
|---|---|
Use Scenario: Analog sensor outputs (e.g., thermistor, potentiometer) produce slow, noisy voltage ramps that must be converted to clean digital edges for MCU sampling. IC Role / Device Role / Timing Role: Schmitt-trigger inverter acting as analog-to-digital signal conditioner and noise filter before ADC input or GPIO capture. Use Value: Eliminates need for external RC filters or comparator circuits; hysteresis prevents chatter near threshold during slow transitions. | Use Scenario: A microcontroller requires a clean, debounced power-on reset pulse generated from an RC network with long time constants. IC Role / Device Role / Timing Role: First-stage inverter shapes the RC ramp into a monotonic, jitter-free reset assertion/deassertion signal. Use Value: Ensures deterministic reset timing across temperature and supply variation; avoids spurious resets caused by noise on reset line. |
| Legacy TTL-to-CMOS Translation | Motor Control Feedback Debouncing |
Use Scenario: Interfacing 3.3 V FPGA I/O to 5 V legacy peripherals where voltage level mismatch causes marginal logic recognition. IC Role / Device Role / Timing Role: Bidirectional level translator leveraging rail-tolerant inputs and CMOS-compatible outputs. Use Value: Enables direct connection without external level shifters; input hysteresis rejects noise induced by mixed-voltage routing. | Use Scenario: Hall-effect or optical encoder signals from brushed DC motors contain mechanical bounce and EMI spikes. IC Role / Device Role / Timing Role: Signal conditioner placed between encoder output and motor driver's direction/enable logic. Use Value: Prevents erratic motor direction reversal or unintended start/stop due to contact bounce or EMI-induced glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schmitt-trigger inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT14DR | No input hysteresis spec explicitly guaranteed; VIH/VIL tighter but no VN/VP parameters published. | Lacks documented noise margin specs; less suitable for marginal-signal conditioning. | Prefer 74VHCT14AMX when input noise immunity is critical; SN74HCT14DR acceptable for clean-signal inversion only. |
| MC74VHC14DT | Higher VCC range (2–5.5 V); lower VIH (1.5 V typ.) but no guaranteed hysteresis voltage spec. | Better for 3.3 V systems; insufficient hysteresis data for noise-prone 5 V environments. | Select 74VHCT14AMX for 5 V industrial designs requiring verified hysteresis; MC74VHC14DT fits dual-voltage portable gear. |
Compared with SN74HCT14DR and MC74VHC14DT, the 74VHCT14AMX uniquely guarantees hysteresis voltage (0.4–1.5 V), input overvoltage tolerance up to 7 V, and power-down protection-making it the only choice for robust signal conditioning in electrically harsh 5 V systems.
Availability
74VHCT14AMX is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, legacy TTL-to-CMOS translation, and motor feedback debouncing requiring stable component supply and long-term manufacturability.
Supply support for 74VHCT14AMX 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 consumer applications.
The VHCT logic family-including the 74VHCT14AMX-is engineered for high-noise-immunity digital interfacing in industrial and mixed-voltage systems, emphasizing reliability, wide supply tolerance, and seamless integration with legacy 74-series designs.
FAQ
What is the operating temperature range for the 74VHCT14AMX?
The 74VHCT14AMX is rated for operation from –40°C to +85°C. This extended industrial temperature range ensures reliable performance in factory automation, outdoor instrumentation, and motor control enclosures where ambient conditions vary significantly. All DC and AC electrical specifications-including propagation delay, VIH/VIL, and output drive-are guaranteed across this full range.
Does the 74VHCT14AMX support 3.3 V input signals when powered at 5 V?
Yes, the 74VHCT14AMX accepts 3.3 V logic inputs while operating at 5 V VCC. Its input voltage range is specified from 0 V to +5.5 V, and its VIH threshold is 2.0 V (min) at VCC = 4.5 V. This makes the 74VHCT14AMX ideal for interfacing 3.3 V microcontrollers or FPGAs to 5 V subsystems without level-shifting components.
Is the 74VHCT14AMX pin-compatible with the standard 74HCT14?
Yes, the 74VHCT14AMX is pin- and function-compatible with the 74HCT14. Both devices use identical 14-pin SOIC packaging and share the same pinout: inputs on pins 1, 3, 5, 9, 11, 13 and outputs on pins 2, 4, 6, 10, 12, 14. The 74VHCT14AMX adds enhanced noise immunity and input protection, making it a drop-in upgrade for existing 74HCT14 designs.
What is the maximum capacitive load the 74VHCT14AMX can drive reliably?
The 74VHCT14AMX is characterized for CL = 15 pF and CL = 50 pF loads in its AC Electrical Characteristics table, with propagation delays specified up to 11.0 ns at 50 pF. While not explicitly rated beyond 50 pF, its ±8 mA output drive capability supports moderate fan-out; for >50 pF loads, buffer stages or layout optimization (short traces, ground planes) are recommended to maintain signal integrity in the 74VHCT14AMX application.
How does the power-down protection in the 74VHCT14AMX work?
The 74VHCT14AMX includes integrated protection circuits that allow inputs and outputs to tolerate –0.5 V to +7.0 V regardless of VCC state-even when VCC = 0 V. This prevents latch-up or damage during hot insertion, power sequencing mismatches, or battery-backup transitions. The protection is inherent to the silicon gate CMOS process and requires no external components, enhancing system robustness in the 74VHCT14AMX implementation.
74VHCT14AMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74VHCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SOIC
74VHCT14AMX FAQ
1.How can I place an order for 74VHCT14AMX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT14AMX 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 74VHCT14AMX reliable?
The price and inventory of 74VHCT14AMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT14AMX is usually 5 days.
3.What payment methods are accepted for 74VHCT14AMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT14AMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT14AMX?
74VHCT14AMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT14AMX 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 74VHCT14AMX?
For technical support, including 74VHCT14AMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT14AMX requirements.
6.How does Aetrix verify that 74VHCT14AMX is sourced from the original manufacturer or authorized distributors?
All 74VHCT14AMX 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 74VHCT14AMX meets industry standards.
7.What is the process for return or replacement of 74VHCT14AMX?
All 74VHCT14AMX units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT14AMX, 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 74VHCT14AMX part is unused and in its original packaging.
Return procedure for 74VHCT14AMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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