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NXP Semiconductors 74HCT14DB,112
- Part No.:
- 74HCT14DB,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
74HCT14DB,112.pdf
- Description:
- IC INVERTER
- Quantity:
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- Shipping:
Inventory:13,806
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Product details
Overview
74HCT14DB,112 from Nexperia is a hex inverting Schmitt trigger IC designed for noise-immune signal conditioning in TTL-level interfacing applications. It features six independent channels, 4.5 V to 5.5 V supply range, ±4.0 mA output drive, Schmitt-trigger hysteresis (0.4–0.6 V typical at VCC = 4.5 V), and operates from –40 °C to +125 °C - used in waveform shaping and relaxation oscillator circuits.
For engineers reviewing the 74HCT14DB,112 datasheet, 74HCT14DB,112 pinout, 74HCT14DB,112 application, or 74HCT14DB,112 equivalent, key selection considerations include TTL-compatible input thresholds (VT+ ≈ 1.41 V, VT− ≈ 0.85 V at VCC = 4.5 V), propagation delay (20–34 ns), low static current (≤2 μA typ), and SO14 package compatibility with legacy board layouts.
Technical Context
The 74HCT14DB,112 implements six independent CMOS inverters with Schmitt-trigger inputs, enabling robust conversion of slow-rising or noisy analog-like signals into clean digital edges. Its input clamping diodes allow safe interface to voltages exceeding VCC when used with current-limiting resistors.
It adheres to JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards, supports unlimited input rise/fall times, and delivers jitter-free output transitions via hysteresis (VH ≈ 0.56 V typ at VCC = 4.5 V), making it suitable for astable/monostable multivibrator timing functions without external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures reliable operation with standard 5 V TTL logic rails and tolerance for rail droop. |
| Input Thresholds (VCC = 4.5 V) | VT+ = 1.41 V, VT− = 0.85 V - enables clean switching on slowly varying inputs with 0.56 V hysteresis. |
| Output Drive | ±4.0 mA - sufficient to directly drive multiple 74-series TTL inputs or small capacitive loads (≤50 pF). |
| Propagation Delay | 20–34 ns (VCC = 4.5 V, CL = 50 pF) - supports stable operation up to ~15 MHz in oscillator or pulse-shaping configurations. |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and under-hood automotive auxiliary control modules. |
| Static Supply Current | ≤2.0 μA (typ), ≤40 μA (max at +125 °C) - enables ultra-low-power standby in battery-backed timing circuits. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces risk of field failure during handling and PCB assembly. |
Pinout & Package
74HCT14DB,112 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 is index-marked; device is surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | Schmitt-trigger inputs - accept slow or noisy signals; clamp diodes permit overvoltage-safe interfacing. |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Inverted outputs - drive TTL/CMOS loads with defined VOH/VOL levels and ±4 mA capability. |
| 7 | GND | Ground reference - must be connected to system 0 V plane for correct logic threshold referencing. |
| 14 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VT+ = 1.41 V, VT− = 0.85 V at VCC = 4.5 V - eliminates need for level-shifters when interfacing with legacy 5 V microcontrollers or sensors. |
| Unlimited input edge rates | Supports arbitrarily slow rise/fall times - enables direct use with RC networks, thermistors, or mechanical switch debouncing without added circuitry. |
| Low dynamic power dissipation | CPD = 8 pF - limits switching power to <100 μW at 1 MHz, critical for energy-constrained embedded timing nodes. |
| Industrial temperature range | –40 °C to +125 °C - validated for continuous operation in motor control enclosures and power supply monitoring circuits. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive parasitic thyristor activation during transient overvoltage events. |
Applications
| Waveform Shaping | Astable Multivibrator |
|---|---|
|
Use Scenario: Converting noisy sine-wave or triangle-wave sensor outputs into clean square waves for microcontroller capture timers. IC Role / Device Role / Timing Role: Signal conditioner - transforms analog-like inputs into deterministic digital edges using Schmitt hysteresis. Use Value: Eliminates false triggering in position/speed sensing systems by rejecting sub-threshold noise without external filtering components. |
Use Scenario: Generating fixed-frequency clock signals for LED flashers or status indicators using only two external resistors and one capacitor. IC Role / Device Role / Timing Role: Oscillator core - leverages internal inverter gain and external RC feedback to sustain oscillation. Use Value: Reduces BOM count and PCB area versus discrete transistor-based oscillators while maintaining frequency stability across temperature. |
| Monostable Multivibrator | Switch Debouncing |
|
Use Scenario: Creating precise, repeatable pulse widths (e.g., 10–100 ms) from momentary push-button presses in industrial HMI panels. IC Role / Device Role / Timing Role: Pulse generator - converts edge-triggered inputs into controlled-duration outputs via RC time constant. Use Value: Provides consistent, jitter-free timing independent of contact bounce duration or operator actuation speed. |
Use Scenario: Cleaning mechanical switch signals before feeding into FPGA I/O banks or microcontroller GPIOs in factory automation controls. IC Role / Device Role / Timing Role: Digital filter - suppresses transients <100 ns using hysteresis, eliminating need for software debounce delays. Use Value: Guarantees single, clean logic transition per press - critical for safety-critical enable/disable functions. |
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 |
|---|---|---|---|
| 74HCT14D,653 | Same SO14 package, identical electrical specs, but rated only to +85 °C ambient (not +125 °C). | Not suitable for under-hood or high-temperature industrial environments where full -40/+125 °C operation is required. | Select when cost sensitivity outweighs extended temperature needs and thermal margin is sufficient. |
| SN74HCT14DR | Texas Instruments variant; same logic function and pinout, but higher ICC (max 20 μA vs. 40 μA) and tighter VOH/VOL tolerances. | Preferred in systems requiring stricter output voltage compliance with legacy 74LS loads or mixed-vendor designs. | Choose when interoperability with TI-based reference designs or tighter DC specs are mandatory. |
Compared with 74HCT14DB,112, the 74HCT14D,653 sacrifices high-temperature reliability for lower cost, while SN74HCT14DR offers tighter DC specs at the expense of broader supply voltage tolerance (4.5–5.5 V vs. TI's 4.5–5.5 V with tighter test conditions), making the Nexperia part optimal for thermally demanding, cost-sensitive industrial timing.
Availability
74HCT14DB,112 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics modules, and power supply supervision circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT14DB,112 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, analog, and MOSFET solutions, with manufacturing rooted in process optimization and automotive-grade quality systems.
The 74HCT14DB,112 belongs to Nexperia's industry-standard 74HCT logic family, engineered specifically for robust TTL-to-CMOS interfacing in harsh environments - emphasizing noise immunity, wide operating margins, and long-term supply stability.
FAQ
Can 74HCT14DB,112 operate from a 3.3 V supply?
No. The 74HCT14DB,112 is specified only for 4.5 V to 5.5 V operation per its recommended conditions table. At 3.3 V, input thresholds fall outside TTL compatibility range and output drive degrades significantly; use 74HC14 or 74LVC14 for 3.3 V systems instead.
What is the maximum capacitive load this device can drive reliably?
The 74HCT14DB,112 is characterized up to 50 pF (per dynamic characteristics table). Driving >50 pF increases propagation delay nonlinearly and may cause ringing; for >100 pF loads, add a series resistor (22–47 Ω) near the output to dampen reflections and maintain edge integrity.
Does this part support hot-swap or live-insertion?
No. The 74HCT14DB,112 lacks powered-off protection or Ioff specification. Applying input signals while VCC is unpowered risks forward-biasing internal clamp diodes and causing excessive current flow - always power VCC before applying inputs.
How does the Schmitt trigger hysteresis improve performance in noisy environments?
Hysteresis creates separate rising (VT+) and falling (VT−) thresholds - e.g., 1.41 V and 0.85 V at 4.5 V - so noise spikes <0.56 V cannot cause unintended output toggling. This eliminates multiple transitions on slow edges, ensuring one clean edge per input crossing, critical for encoder or limit-switch interfaces.
74HCT14DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Circuits:
- -
- Number of Inputs:
- -
- Features:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -
- Input Logic Level - Low:
- -
- Input Logic Level - High:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT14DB,112 FAQ
1.How can I place an order for 74HCT14DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT14DB,112 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 74HCT14DB,112 reliable?
The price and inventory of 74HCT14DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT14DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT14DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT14DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT14DB,112?
74HCT14DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT14DB,112 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 74HCT14DB,112?
For technical support, including 74HCT14DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT14DB,112 requirements.
6.How does Aetrix verify that 74HCT14DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT14DB,112 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 74HCT14DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT14DB,112?
All 74HCT14DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT14DB,112, 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 74HCT14DB,112 part is unused and in its original packaging.
Return procedure for 74HCT14DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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