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NXP Semiconductors 74AHCT14D,112
- Part No.:
- 74AHCT14D,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Gates and Inverters
- Package:
- -
- Datasheet:
-
74AHCT14D,112.pdf
- Description:
- IC INVERTER
- Quantity:
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Inventory:39,955
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Product details
Overview
74AHCT14D,112 from Nexperia is a hex inverting Schmitt trigger IC with TTL-compatible input thresholds, 5.5 V supply capability, overvoltage-tolerant inputs up to 5.5 V, and operation across –40 °C to +125 °C. It provides six independent hysteresis inverters for noise-immune signal conditioning in mixed-voltage digital interfaces, such as level translation between 3.3 V logic and 5 V microcontrollers.
For engineers reviewing the 74AHCT14D,112 datasheet, 74AHCT14D,112 pinout, 74AHCT14D,112 application, or 74AHCT14D,112 equivalent, this device is selected for robust edge detection in industrial control inputs, debounced switch interfaces, relaxation oscillator timing, and ESD-hardened signal conditioning where input hysteresis and voltage-level flexibility are required.
Technical Context
The 74AHCT14D,112 implements six independent Schmitt-trigger inverter stages, each with asymmetric input threshold voltages (VT+ = 1.9 V, VT− = 0.5 V at VCC = 4.5 V) yielding 1.4 V hysteresis. Its TTL-level input compatibility enables direct interfacing with legacy 5 V logic families while maintaining CMOS output drive strength.
It operates within a 4.5 V–5.5 V supply range, supports 8 mA output sink/source capability at VCC = 4.5 V, and delivers propagation delays of 4.0–9.0 ns (CL = 15–50 pF), with static power consumption below 2 μA at 25 °C and <40 μA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems and tolerance against rail droop. |
| Input Thresholds (VCC = 4.5 V) | VT+ = 1.9 V, VT− = 0.5 V - Provides 1.4 V hysteresis for reliable noise rejection on slow or noisy signals. |
| Output Drive (VCC = 4.5 V) | ±8 mA - Sufficient to directly drive multiple 74-series TTL inputs or small capacitive loads without buffering. |
| Propagation Delay (CL = 15 pF) | 4.0 ns (typ), 9.0 ns (max) - Enables use in sub-100 MHz clock conditioning and fast edge regeneration. |
| Input Overvoltage Tolerance | Up to 5.5 V - Allows safe interfacing with higher-voltage signals (e.g., 5 V sensors) without external clamping. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC I/O, and high-ambient embedded control. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces need for external protection in board-level ESD-prone environments. |
Pinout & Package
74AHCT14D,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 lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Data Input (1A–6A) | Six independent Schmitt-trigger inputs; tolerant to 5.5 V regardless of VCC level. |
| 2, 4, 6, 8, 10, 12 | Data Output (1Y–6Y) | Inverted, buffered outputs with rail-to-rail swing and ±8 mA drive capability. |
| 7 | GND | Ground reference (0 V); must be low-impedance for stable hysteresis and noise immunity. |
| 14 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor (100 nF) recommended adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-level input compatibility | Accepts standard 5 V TTL logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while powered from 4.5–5.5 V. |
| Overvoltage-tolerant inputs | Inputs withstand up to 5.5 V even when VCC = 0 V - enables hot-swap and mixed-rail interface safety. |
| High noise immunity | 1.4 V hysteresis at VCC = 4.5 V suppresses glitches from EMI, crosstalk, or mechanical switch bounce. |
| Low static power | ICC < 2 μA at 25 °C and < 40 μA at +125 °C - suitable for always-on industrial monitoring nodes. |
| Wide temperature operation | Specified from –40 °C to +125 °C - validated for engine control units, motor drives, and outdoor infrastructure. |
Applications
| Industrial Sensor Interface | Microcontroller Input Conditioning |
|---|---|
Use Scenario: Converting noisy analog sensor outputs (e.g., thermistor divider, proximity switch) into clean digital edges for PLC input modules. IC Role / Device Role / Timing Role: Schmitt-trigger inverter providing hysteresis-based noise filtering and level-shifting from 5 V sensor rails to 3.3 V or 5 V MCU GPIO. Use Value: Eliminates external RC debounce and reduces firmware polling overhead by delivering glitch-free interrupt triggers. |
Use Scenario: Debouncing mechanical pushbuttons or rotary encoders connected to ARM Cortex-M or PIC microcontrollers. IC Role / Device Role / Timing Role: Six independent inverters used as input filters and signal conditioners before GPIO capture or external interrupt pins. Use Value: Guarantees single, clean transitions per press-no missed or double-counted events-even with >10 ms contact bounce. |
| Relaxation Oscillator | Legacy System Level Translation |
Use Scenario: Generating precise low-frequency clocks (1–100 kHz) for timing functions in energy meters or HVAC controllers using only R and C components. IC Role / Device Role / Timing Role: One inverter stage configured as astable multivibrator with feedback resistor and timing capacitor. Use Value: Delivers stable frequency with <±5% variation over temperature-no crystal or dedicated timer IC required. |
Use Scenario: Interfacing 5 V legacy peripherals (e.g., RS-232 transceivers, optocoupler drivers) with modern 3.3 V FPGA or SoC I/O banks. IC Role / Device Role / Timing Role: Bidirectional level translator leveraging overvoltage-tolerant inputs and CMOS outputs. Use Value: Enables direct connection without series resistors or active translators-reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex Schmitt-trigger inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT14DR (Texas Instruments) | Identical pinout, same 4.5–5.5 V supply, but specified only to +85 °C (not +125 °C); slightly higher ICC (max 50 μA at +125 °C not tested). | Limited to commercial/industrial ambient environments; unsuitable for under-hood or high-temp enclosure use. | Select when cost sensitivity outweighs extended temperature requirement and TI supply chain preference applies. |
| 74LVC14AD,118 (Nexperia) | Lower VCC range (1.65–5.5 V), CMOS-input thresholds, max 3.3 V operation at 1.65 V; no TTL compatibility. | Designed for 1.8 V/2.5 V/3.3 V systems only; cannot replace 74AHCT14D,112 in 5 V TTL environments. | Choose only for new low-voltage designs requiring 1.8 V compatibility-requires redesign of input biasing and supply rails. |
Compared with SN74AHCT14DR, the 74AHCT14D,112 offers guaranteed +125 °C operation critical for automotive and industrial thermal margins; versus 74LVC14AD,118, it preserves TTL-level interoperability essential for legacy 5 V system integration without level-shifter overhead.
Availability
74AHCT14D,112 is available at Aetrix Electronics and suitable for industrial automation I/O modules, automotive body control units, smart meter sensor front-ends, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT14D,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, discrete, and MOSFET solutions, with leadership in automotive-grade and industrial-grade standard products.
The 74AHCT14D,112 belongs to Nexperia's AHCT logic family-designed specifically for seamless 5 V TTL-to-CMOS interfacing with enhanced robustness, ESD resilience, and extended temperature performance.
FAQ
Can 74AHCT14D,112 operate with a 3.3 V supply?
No. The 74AHCT14D,112 is TTL-input compatible and specified only for 4.5 V to 5.5 V supply operation. At 3.3 V, input thresholds fall outside TTL recognition levels, risking unreliable switching. For 3.3 V systems, use the 74AHC14D variant or 74LVC14AD instead.
What is the maximum capacitive load this device can drive reliably?
The 74AHCT14D,112 is characterized up to 50 pF load capacitance with guaranteed propagation delay (≤9.0 ns). Driving >50 pF may increase delay unpredictably and risk output ringing; for >100 pF loads, add a series resistor (22–47 Ω) near the output to dampen reflections.
Is pin 7 (GND) the only ground connection required?
Yes. Pin 7 is the sole GND terminal for the SO14 package. All internal circuitry references this node. A low-inductance, low-impedance PCB ground plane connection is mandatory to maintain noise immunity and hysteresis stability-especially when driving multiple loads simultaneously.
Does this device support hot-swap insertion when VCC is unpowered?
Yes. Inputs tolerate up to 5.5 V even with VCC = 0 V, satisfying IEC 61000-4-2 Level 4 ESD immunity requirements. However, sustained DC voltage on inputs during VCC-off conditions should be limited to <5.5 V and current-limited to <1 mA via series resistance to prevent latch-up risk.
74AHCT14D,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:
- -
74AHCT14D,112 FAQ
1.How can I place an order for 74AHCT14D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT14D,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 74AHCT14D,112 reliable?
The price and inventory of 74AHCT14D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT14D,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT14D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT14D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT14D,112?
74AHCT14D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT14D,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 74AHCT14D,112?
For technical support, including 74AHCT14D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT14D,112 requirements.
6.How does Aetrix verify that 74AHCT14D,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT14D,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 74AHCT14D,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT14D,112?
All 74AHCT14D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT14D,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 74AHCT14D,112 part is unused and in its original packaging.
Return procedure for 74AHCT14D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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