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Nexperia USA Inc. 74HCT14DB,118
- Part No.:
- 74HCT14DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT14DB,118.pdf
- Description:
- IC INVERT SCHMITT 6CH 1IN 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
74HCT14DB,118 from Nexperia is a hex inverting Schmitt trigger IC designed for noise-immune signal conditioning in digital systems. It operates from 4.5 V to 5.5 V, features TTL-compatible input thresholds (VT+ = 1.41 V typ, VT− = 0.85 V typ at VCC = 4.5 V), 6 independent channels, and delivers jitter-free output transitions with propagation delay of 20–34 ns (VCC = 4.5 V, CL = 50 pF). It is used in waveform shaping and relaxation oscillator circuits.
For engineers reviewing the 74HCT14DB,118 datasheet, 74HCT14DB,118 pinout, 74HCT14DB,118 application, or 74HCT14DB,118 equivalent, key selection criteria include Schmitt-trigger hysteresis (0.56 V typ), input clamp diodes enabling overvoltage-tolerant interfacing, SO14 package compatibility, −40 °C to +125 °C operation, and compliance with JEDEC JESD7A and JESD8C standards.
Technical Context
The 74HCT14DB,118 implements six independent CMOS inverter stages, each with asymmetric Schmitt-trigger input thresholds optimized for TTL-level signal reception. Its input structure includes integrated clamp diodes referenced to VCC and GND, allowing safe interface to signals exceeding supply rails when current-limited.
It uses standard 74HCT logic family architecture with rail-to-rail output swing, static power consumption below 2 μA at 25 °C, and dynamic power governed by CPD = 8 pF. The device supports unlimited input rise/fall times and exhibits latch-up immunity exceeding 100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial-grade 5 V rails with ±5% tolerance. |
| Input Thresholds (VT+, VT−) | 1.41 V / 0.85 V typ at VCC = 4.5 V - Enables reliable recognition of TTL logic levels (0.8 V/2.0 V) with 0.56 V hysteresis. |
| Propagation Delay | 20–34 ns (VCC = 4.5 V, CL = 50 pF) - Supports stable timing in low-frequency oscillator and pulse-shaping applications up to ~10 MHz. |
| Output Drive | ±4.0 mA - Sufficient to drive multiple 74HCT inputs or small capacitive loads without external buffering. |
| Operating Temperature | −40 °C to +125 °C - Qualified for extended-temperature industrial and automotive under-hood environments. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Provides robust handling integrity during PCB assembly and field service. |
| Power Dissipation | CPD = 8 pF - Enables accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal design. |
Pinout & Package
74HCT14DB,118 is housed in a 14-lead SO14 (SOT108-1) plastic small outline package, 3.9 mm body width, with gull-wing leads and pin 1 index marker. Thermal resistance θJA = 100 K/W (JEDEC Std. 51-7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (1A–6A) | Six independent Schmitt-trigger inputs; each accepts slow-rising/falling signals and provides noise margin via hysteresis. |
| 2, 4, 6, 8, 10, 12 | Output (1Y–6Y) | Inverted, rail-to-rail CMOS outputs; each drives one standard 74HCT load (20 pF + 1 unit load) at full speed. |
| 7 | GND | Reference ground for all I/O and internal circuitry; must be low-impedance for noise immunity. |
| 14 | VCC | Positive supply rail; decoupling capacitor (100 nF ceramic) required within 10 mm of this pin. |
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-shifting when interfacing with legacy 5 V TTL sources. |
| Integrated input clamp diodes | VI clamping to VCC/GND - Allows direct connection to voltages up to VCC + 0.5 V with series resistor, simplifying overvoltage protection. |
| Unlimited input edge rates | No minimum rise/fall time requirement - Accepts arbitrarily slow analog-like transitions without metastability or oscillation. |
| High noise immunity | 0.56 V typical hysteresis - Rejects high-frequency noise spikes ≤ 500 mV amplitude on input lines. |
| Latch-up immunity | >100 mA per JESD78 Class II Level B - Survives transient current injection events common in noisy industrial environments. |
Applications
| Waveform Shaping | Pulse Conditioning |
|---|---|
|
Use Scenario: Converting noisy or slowly varying sensor outputs (e.g., thermistor voltage ramps, mechanical switch bounce) into clean digital edges. IC Role / Device Role: Six-channel Schmitt-trigger inverter providing threshold-based signal regeneration with hysteresis. Use Value: Eliminates false triggering caused by EMI or contact bounce; enables reliable microcontroller GPIO capture without software debouncing. |
Use Scenario: Cleaning up degraded clock or control signals in legacy industrial PLC backplanes with long trace runs and impedance mismatches. IC Role / Device Role: Signal restorer that reshapes attenuated or distorted pulses into sharp, jitter-free logic transitions. Use Value: Restores timing margins lost due to RC filtering; ensures setup/hold compliance for downstream flip-flops or microcontrollers. |
| Astable Multivibrator | Monostable Timing Circuit |
|
Use Scenario: Generating fixed-frequency square waves (e.g., 1–100 kHz) for LED blinking, audio tone generation, or system clock derivation. IC Role / Device Role: Core inverter element in a two-gate relaxation oscillator with external R/C network. Use Value: Delivers stable frequency determined by K-factor (0.6–1.2 for 74HCT14), insensitive to supply drift or temperature variation. |
Use Scenario: Creating precise one-shot delays (e.g., 10 μs–1 s) for reset synchronization, bus arbitration, or power sequencing. IC Role / Device Role: Triggered inverter stage combined with RC feedback to generate defined pulse width independent of input duration. Use Value: Provides deterministic delay with <5% variation over −40 °C to +125 °C, eliminating need for precision timing ICs. |
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,118 | Same die, identical electrical specs, but in standard SO14 (SOT108-1) without "B" suffix - no functional difference. | No difference; pinout, timing, and thermal behavior fully interchangeable. | Select when standard marking or legacy BOM alignment is required; same footprint and performance. |
| SN74HCT14DR | TI variant: VIH/VIL thresholds tighter (1.2 V/0.8 V min), CPD = 12 pF, slightly higher ICC (max 40 μA vs. 20 μA). | Higher dynamic power and marginally faster edge response; less tolerant of marginal input noise. | Prefer for TI-design ecosystems requiring dual-sourcing; verify thermal budget if operating near 125 °C with high switching activity. |
Compared with 74HCT14DB,118, the 74HCT14D,118 offers identical functionality in a functionally equivalent package, while SN74HCT14DR trades lower static current for higher dynamic capacitance and tighter input thresholds-making it suitable where noise margin is secondary to edge speed consistency.
Availability
74HCT14DB,118 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics modules, and test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 74HCT14DB,118 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT14DB,118 belongs to Nexperia's 74HCT logic family, engineered specifically for TTL-compatible interfacing in mixed-voltage systems where noise immunity and wide operating temperature are critical.
FAQ
What is the maximum recommended operating frequency for 74HCT14DB,118?
The 74HCT14DB,118 does not specify a maximum clock frequency, as it is not a clocked device. Its usable switching rate is limited by propagation delay (20–34 ns) and load capacitance. For reliable operation with CL = 50 pF, maximum toggle rate is approximately 10 MHz; higher frequencies require reduced load or lower VCC-dependent timing margins.
Can 74HCT14DB,118 safely interface with 3.3 V logic inputs?
No-74HCT14DB,118 inputs are TTL-compatible (VIH ≥ 2.0 V), not 3.3 V CMOS-compatible. A 3.3 V logic HIGH may fall below its guaranteed VIH (2.0 V min), risking unreliable switching. Use a level translator or 74LVC14 for 3.3 V–5 V bidirectional interfacing.
Is the SO14 package of 74HCT14DB,118 RoHS compliant and lead-free?
Yes-74HCT14DB,118 is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. The SOT108-1 package uses matte tin (Sn) lead finish, with peak reflow temperature rated to 260 °C per JEDEC J-STD-020.
Does 74HCT14DB,118 require external pull-up or pull-down resistors on unused inputs?
Yes-unused inputs must be terminated to VCC or GND. Floating CMOS inputs cause increased ICC, unpredictable output states, and potential oscillation. Tie each unused A-input directly to VCC or GND; do not leave open or rely on PCB leakage paths.
74HCT14DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-SSOP (0.209", 5.30mm 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:
- 4mA, 4mA
- Input Logic Level - Low:
- 0.5V ~ 0.6V
- Input Logic Level - High:
- 1.9V ~ 2.1V
- Max Propagation Delay @ V, Max CL:
- 34ns @ 4.5V, 50pF
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
74HCT14DB,118 FAQ
1.How can I place an order for 74HCT14DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT14DB,118 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,118 reliable?
The price and inventory of 74HCT14DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT14DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT14DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT14DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT14DB,118?
74HCT14DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT14DB,118 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,118?
For technical support, including 74HCT14DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT14DB,118 requirements.
6.How does Aetrix verify that 74HCT14DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT14DB,118 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,118 meets industry standards.
7.What is the process for return or replacement of 74HCT14DB,118?
All 74HCT14DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT14DB,118, 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,118 part is unused and in its original packaging.
Return procedure for 74HCT14DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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