Overview
The SN74LS14NE4 is a hex Schmitt-Trigger inverter integrated circuit produced by Texas Instruments. This device contains six independent inverter circuits, each functioning as a Schmitt-Trigger inverter. The Schmitt-Trigger action provides high noise immunity and the ability to operate from very slow transition edge inputs, making it suitable for a variety of applications where noisy or slow inputs are present.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VT+ (Positive-Going Threshold Voltage) | VCC = 5 V | 1.4 | 1.6 | 1.9 | V |
| VT– (Negative-Going Threshold Voltage) | VCC = 5 V | 0.5 | 0.8 | 1.1 | V |
| Hysteresis (VT+ – VT–) | VCC = 5 V | 0.4 | 0.8 | V | |
| VOH (Output High Voltage) | VCC = MIN, VI = 0.5 V, IOH = –0.4 mA | 2.4 | 3.4 | V | |
| VOL (Output Low Voltage) | VCC = MIN, VI = 1.9 V, IOL = 4 mA | 0.25 | 0.4 | V | |
| tPLH (Propagation Delay Time, Low to High) | RL = 400 Ω and CL = 15 pF, or RL = 2 kΩ and CL = 15 pF | 15 | 22 | ns | |
| tPHL (Propagation Delay Time, High to Low) | RL = 400 Ω and CL = 15 pF, or RL = 2 kΩ and CL = 15 pF | 15 | 22 | ns | |
| Operating Temperature Range | 0 | 70 | °C | ||
| Package Type | PDIP (14 pins) |
Key Features
- Operation From Very Slow Edges: The device can handle very slow transition edge inputs without causing oscillation or excessive current draw.
- High Noise Immunity: The Schmitt-Trigger action provides a minimum separation between positive and negative switching thresholds, enhancing noise immunity.
- Temperature Compensated: The thresholds are temperature compensated, ensuring stable operation over a range of temperatures.
- Independent Inverters: Six independent inverter circuits are included in the device.
- Low Power Consumption: The device operates with low power consumption, making it suitable for various applications.
Applications
- HVAC Gateways: Used in heating, ventilation, and air conditioning systems for reliable signal processing.
- Residential Ductless Air Conditioning Outdoor Units: Enhances the reliability of outdoor units by handling noisy inputs effectively.
- Robotic Controls: Utilized in robotic systems to ensure stable and noise-free signal processing.
- Industrial Stepper Motors: Used in industrial automation for precise and reliable motor control.
- Power Meter and Power Analyzers: Employed in power measurement and analysis equipment to handle noisy signals accurately.
- Digital Input Modules for Factory Automation: Used in factory automation to provide reliable digital input signals.
Q & A
- What is the primary function of the SN74LS14NE4?
The primary function of the SN74LS14NE4 is to act as a hex Schmitt-Trigger inverter, providing six independent inverter circuits.
- What is the operating temperature range of the SN74LS14NE4?
The operating temperature range is from 0°C to 70°C.
- What is the significance of the Schmitt-Trigger action in the SN74LS14NE4?
The Schmitt-Trigger action provides high noise immunity by maintaining a minimum separation between positive and negative switching thresholds.
- What are the typical applications of the SN74LS14NE4?
Typical applications include HVAC gateways, residential ductless air conditioning outdoor units, robotic controls, industrial stepper motors, power meters, and digital input modules for factory automation.
- What is the package type of the SN74LS14NE4?
The package type is PDIP (14 pins).
- How does the SN74LS14NE4 handle slow transition edge inputs?
The device can operate from very slow transition edge inputs without causing oscillation or excessive current draw.
- What are the propagation delay times for the SN74LS14NE4?
The propagation delay times (tPLH and tPHL) are typically 22 ns with a load resistance of 400 Ω and a capacitance of 15 pF.
- Is the SN74LS14NE4 temperature compensated?
Yes, the thresholds are temperature compensated to ensure stable operation over a range of temperatures.
- How many independent inverter circuits does the SN74LS14NE4 contain?
The device contains six independent inverter circuits.
- What are the output voltage levels for the SN74LS14NE4?
The output high voltage (VOH) is typically 3.4 V, and the output low voltage (VOL) is typically 0.4 V.
