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NXP Semiconductors 74HCT3G14DC,125
- Part No.:
- 74HCT3G14DC,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74HCT3G14DC,125.pdf
- Description:
- IC INVERT SCHMITT 3CH 3IN 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:102,802
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Product details
Overview
74HCT3G14DC,125 from Nexperia is a triple inverting Schmitt trigger IC with TTL-compatible inputs, operating from 4.5 V to 5.5 V supply, delivering sharp waveform shaping via 1.20–1.90 V positive-going and 0.50–1.20 V negative-going input thresholds, and supporting industrial temperature range (−40 °C to +125 °C) for noise-immune signal conditioning in oscillator and timing circuits.
For engineers reviewing the 74HCT3G14DC,125 datasheet, 74HCT3G14DC,125 pinout, 74HCT3G14DC,125 application, or 74HCT3G14DC,125 equivalent, key selection considerations include its VSSOP8 package footprint, 21–48 ns propagation delay across voltage/temperature, Schmitt-trigger hysteresis (0.40–0.71 V), TTL-level input compatibility, and −40 °C to +125 °C operation without derating.
Technical Context
This device implements three independent inverting Schmitt triggers in a single VSSOP8 package, each with input clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Its transfer characteristics are defined by dual threshold voltages (VT+, VT−) and hysteresis (VH), ensuring robust noise rejection on slow-rising/falling signals.
The logic function is strictly inverting: a LOW input produces a HIGH output and vice versa, per Table 4. Static and dynamic performance-including VOH ≥ 4.18 V at IO = −4.0 mA (VCC = 4.5 V), VOL ≤ 0.26 V at IO = 4.0 mA, and typical tpd = 32 ns-meets JEDEC JESD7A and JESD8C standards for industrial-grade digital logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V TTL systems without level-shifting. |
| Input Thresholds (VT+ / VT−) | 1.20–1.90 V / 0.50–1.20 V at VCC = 4.5–5.5 V - Defines hysteresis window for noise immunity on slow edges. |
| Propagation Delay (tpd) | 21–48 ns - Determines maximum reliable oscillation frequency in relaxation circuits (e.g., ~10 MHz upper bound). |
| Output Drive (IO) | ±4.0 mA - Sufficient to drive standard CMOS/TTL loads or small capacitive nodes directly. |
| Operating Temperature | −40 °C to +125 °C - Validated for extended industrial environments without thermal derating. |
| Power Dissipation (Ptot) | 250 mW (derates 4.9 mW/K above 99 °C) - Sets thermal limits for continuous operation in compact PCB layouts. |
| ESD Rating (HBM/CDM) | >2000 V HBM / >1000 V CDM - Supports handling and board assembly without special ESD controls. |
Pinout & Package
VSSOP8 plastic very thin shrink small outline package (SOT765-1); 8 leads; body width 2.3 mm; pin 1 indicator located below marking code in lower-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 6 | Input (1A, 2A, 3A) | Three independent Schmitt-trigger inputs accepting TTL-level signals; clamp diodes allow overvoltage tolerance with series resistors. |
| 2, 5, 7 | Output (3Y, 1Y, 2Y) | Inverted, jitter-free outputs; each drives ±4.0 mA into resistive or capacitive loads up to 50 pF. |
| 4 | GND | Ground reference for all I/O and internal circuitry; must be low-impedance for stable hysteresis and noise immunity. |
| 8 | VCC | Positive supply rail (4.5–5.5 V); decoupling capacitor (100 nF) required within 5 mm for clean switching transitions. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Validates direct interface with legacy 5 V microcontrollers, logic families, and sensors without level shifters. |
| Triple independent Schmitt triggers | Enables concurrent waveform shaping of three separate noisy signals (e.g., encoder A/B/Z, sensor pulses, reset lines). |
| Unlimited input rise/fall times | Eliminates need for external RC differentiation; accepts arbitrarily slow edges (e.g., thermistor-based timing) without metastability. |
| High noise immunity (hysteresis ≥ 0.40 V) | Rejects >400 mV peak-to-peak noise on input lines, critical in motor control, industrial sensing, and relay feedback paths. |
| Latch-up immunity & ESD robustness | Exceeds JESD78 Class II Level B (100 mA) and JS-001 Class 2 (2000 V HBM), enabling use in unshielded industrial enclosures. |
Applications
| Waveform Shaping in Motor Control | Astable Multivibrator Timing |
|---|---|
Use Scenario: Conditioning Hall-effect sensor outputs in BLDC motor commutation where PWM noise corrupts zero-crossing detection. IC Role / Device Role / Timing Role: Inverting Schmitt trigger cleans slow, noisy analog-to-digital transition edges into clean square waves for MCU timer capture. Use Value: Enables precise 120° phase alignment between rotor position and stator excitation without software debouncing or external RC filters. | Use Scenario: Generating fixed-frequency clock signals for LED flashers or status indicators using only R/C components. IC Role / Device Role / Timing Role: One gate forms relaxation oscillator; remaining two provide buffered output and enable/disable control. Use Value: Achieves stable 1–10 kHz oscillation with <±5% tolerance over temperature, eliminating need for quartz crystal or dedicated timer IC. |
| Monostable Pulse Generation | Noise-Immune Reset Signal Conditioning |
Use Scenario: Converting mechanical switch bounce or long-wire sensor pulses into clean, fixed-width trigger events. IC Role / Device Role / Timing Role: Input edge triggers RC network; Schmitt inverter provides sharp-edged, jitter-free output pulse. Use Value: Delivers consistent 10–100 μs output pulses regardless of input edge slew rate, ensuring reliable interrupt triggering in safety-critical subsystems. | Use Scenario: Debouncing power-on reset signals from brown-out detectors or manual reset buttons exposed to EMI in factory automation panels. IC Role / Device Role / Timing Role: Filters high-frequency transients while preserving intentional reset assertion duration. Use Value: Prevents spurious MCU resets caused by 10–100 ns EFT bursts, meeting IEC 61000-4-4 Level 3 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple inverting Schmitt trigger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC3G14DCUR | Lower VCC range (1.65–5.5 V); CMOS inputs; 3.5 ns faster tpd at 3.3 V but reduced hysteresis (0.25 V typical). | Better suited for mixed-voltage 3.3 V/5 V systems; less effective against sub-200 mV noise than 74HCT3G14DC. | Select when interfacing with 3.3 V FPGAs or low-power MCUs and noise amplitude is <200 mV. |
| MC74VHC3G14DTT1G | Wider VCC (2.0–5.5 V); CMOS inputs; higher VIH/VIL thresholds; 1.5× higher ICC at 5.5 V. | Superior noise margin at 2.0 V operation; unsuitable for direct TTL bus interfacing due to VIH = 3.5 V min. | Prefer for battery-powered 2.0–3.6 V designs requiring ultra-low static current and wide supply tolerance. |
Compared with SN74LVC3G14DCUR and MC74VHC3G14DTT1G, the 74HCT3G14DC,125 uniquely balances TTL-level compatibility, industrial temperature support, and robust 0.40–0.71 V hysteresis-making it optimal for legacy 5 V systems where noise immunity and bus interoperability are non-negotiable.
Availability
74HCT3G14DC,125 is available at Aetrix Electronics and suitable for industrial motor control, factory automation timing, embedded reset conditioning, and sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74HCT3G14DC,125 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 74HCT3G14 series belongs to Nexperia's industry-standard logic portfolio, designed specifically for robust signal integrity in electrically noisy industrial environments where deterministic edge generation and noise rejection are essential.
FAQ
What is the minimum recommended VCC for reliable operation of 74HCT3G14DC,125?
The absolute minimum VCC is 4.5 V per Table 6. Operation below this violates the TTL input specification: VIH must exceed 2.0 V, and at VCC < 4.5 V, the guaranteed VT+ drops below 1.2 V, risking false triggering from noise. Full functionality-including specified VOH, VOL, and tpd-is only assured from 4.5 V to 5.5 V.
Can 74HCT3G14DC,125 drive a 50 pF load at 10 MHz without signal degradation?
Yes. With CPD = 10 pF and typical tt = 15 ns, the output maintains monotonic transitions into 50 pF loads. Measured tpd remains ≤48 ns and tt ≤22 ns under those conditions (Table 9), confirming clean edge integrity. However, total dynamic power rises to ~1.2 mW at 10 MHz, requiring adequate PCB thermal relief.
How does the input clamp diode affect interfacing with 12 V sensor signals?
The integrated clamp diodes allow safe connection of 12 V signals when paired with a series current-limiting resistor. For example, a 10 kΩ resistor limits IIK to 0.7 mA at 12 V (well below ±20 mA max), protecting the input while preserving Schmitt-trigger functionality-no external diodes or voltage dividers needed.
Is 74HCT3G14DC,125 qualified for automotive applications?
No. This part is specified only for industrial temperature range (−40 °C to +125 °C) and carries no AEC-Q200 qualification. Nexperia explicitly states in Section 17 that non-automotive qualified products are not tested to automotive reliability or stress standards, and inclusion in automotive systems voids warranty and incurs full customer liability.
74HCT3G14DC,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Inverter
- Number of Circuits:
- 3
- Number of Inputs:
- 3
- Features:
- Schmitt Trigger
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.5V ~ 0.6V
- Input Logic Level - High:
- 1.9V ~ 2.1V
- Max Propagation Delay @ V, Max CL:
- 32ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
74HCT3G14DC,125 FAQ
1.How can I place an order for 74HCT3G14DC,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT3G14DC,125 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 74HCT3G14DC,125 reliable?
The price and inventory of 74HCT3G14DC,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT3G14DC,125 is usually 5 days.
3.What payment methods are accepted for 74HCT3G14DC,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT3G14DC,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT3G14DC,125?
74HCT3G14DC,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT3G14DC,125 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 74HCT3G14DC,125?
For technical support, including 74HCT3G14DC,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT3G14DC,125 requirements.
6.How does Aetrix verify that 74HCT3G14DC,125 is sourced from the original manufacturer or authorized distributors?
All 74HCT3G14DC,125 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 74HCT3G14DC,125 meets industry standards.
7.What is the process for return or replacement of 74HCT3G14DC,125?
All 74HCT3G14DC,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT3G14DC,125, 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 74HCT3G14DC,125 part is unused and in its original packaging.
Return procedure for 74HCT3G14DC,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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