Overview
The SN74LS14N is a hex Schmitt-Trigger inverter integrated circuit produced by Texas Instruments. This device is part of the 74LS series, known for its low power consumption and high noise immunity. Each of the six independent inverters in the SN74LS14N features Schmitt-Trigger inputs, which provide different input threshold levels for positive-going and negative-going signals. This characteristic allows the device to handle noisy or slow input signals effectively, preventing issues such as oscillation or excessive current draw.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | PDIP (N) | - |
| Pins | 14 | - |
| Operating Temperature Range | 0 to 70 | °C |
| Supply Voltage Range | 4.75 to 5.25 | V |
| Positive-Going Threshold Voltage (VT+) | 1.4 to 1.9 | V |
| Negative-Going Threshold Voltage (VT–) | 0.5 to 0.8 | V |
| Junction-to-Ambient Thermal Resistance (RθJA) | 54.9 | °C/W |
Key Features
- Operation From Very Slow Edges: The device can handle very slow transition edge inputs without causing oscillation or excessive current draw.
- Improved Line-Receiving Characteristics: The Schmitt-Trigger inputs enhance the device's ability to receive and process signals from noisy or slow inputs.
- High Noise Immunity: The device is designed to provide high noise immunity, making it suitable for applications where signal integrity is critical.
- Temperature Compensation: The circuits are temperature compensated, ensuring stable operation across a range of temperatures.
Applications
- HVAC Gateways: Used in heating, ventilation, and air conditioning systems for reliable signal processing.
- Residential Ductless Air Conditioning Outdoor Units: Employed to handle slow and noisy input signals in air conditioning systems.
- Robotic Controls: Utilized in robotic systems to ensure clean and jitter-free output signals.
- Industrial Stepper Motors: Applied in industrial automation for precise and reliable signal handling.
- Power Meter and Power Analyzers: Used in power measurement and analysis applications where signal integrity is crucial.
- Digital Input Modules for Factory Automation: Implemented in factory automation systems to handle various types of input signals.
Q & A
- What is the primary function of the SN74LS14N?
The SN74LS14N functions as a hex Schmitt-Trigger inverter, providing six independent inverters with Schmitt-Trigger inputs.
- What is the operating temperature range of the SN74LS14N?
The operating temperature range is from 0°C to 70°C.
- What is the supply voltage range for the SN74LS14N?
The supply voltage range is from 4.75 V to 5.25 V.
- What are the key features of the Schmitt-Trigger inputs in the SN74LS14N?
The Schmitt-Trigger inputs provide different input threshold levels for positive-going and negative-going signals, ensuring high noise immunity and the ability to handle slow input signals.
- What are some common applications of the SN74LS14N?
Common applications include HVAC gateways, residential ductless air conditioning outdoor units, robotic controls, industrial stepper motors, power meters, and digital input modules for factory automation.
- How does the SN74LS14N handle noisy or slow input signals?
The device handles noisy or slow input signals effectively due to its Schmitt-Trigger inputs, which provide a minimum separation between positive and negative switching thresholds.
- What is the package type and pin count of the SN74LS14N?
The SN74LS14N comes in a PDIP (N) package with 14 pins.
- What is the junction-to-ambient thermal resistance of the SN74LS14N in PDIP (N) package?
The junction-to-ambient thermal resistance (RθJA) is 54.9°C/W.
- Is the SN74LS14N temperature compensated?
Yes, the circuits in the SN74LS14N are temperature compensated, ensuring stable operation across a range of temperatures.
- Can the SN74LS14N be used in high-noise environments?
Yes, the device is designed to provide high noise immunity, making it suitable for applications in high-noise environments.
