Overview
The SN74HC14DB, produced by Texas Instruments, is a hex Schmitt-trigger inverter integrated circuit. This device contains six independent inverters, each performing the Boolean function Y = A in positive logic. The Schmitt-trigger inputs are designed to provide a minimum separation between positive and negative switching thresholds, making them suitable for handling noisy or slow input signals that could cause issues with standard CMOS inputs.
The SN74HC14DB operates over a wide voltage range of 2 V to 6 V, making it versatile for various system applications. It is available in several package types, including SOIC, SSOP, PDIP, SO, and TSSOP, catering to different design and space requirements.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VCC Supply Voltage | V | 2 | 5 | 6 |
| VI Input Voltage | V | 0 | - | VCC |
| VO Output Voltage | V | 0 | - | VCC |
| TA Operating Free-Air Temperature | °C | -40 | - | 85 |
| ICC Power Consumption | μA | - | - | 20 |
| tpd Propagation Delay | ns | 11 | - | - |
| IOL Output Drive | mA | - | - | ±4 |
| II Input Current | nA | - | - | ±1000 |
Key Features
- Wide Operating Voltage Range: The device operates from 2 V to 6 V, making it suitable for a variety of systems.
- Schmitt-Trigger Inputs: Designed to handle noisy or slow input signals, reducing the risk of oscillation or excessive current draw.
- Low Power Consumption: Maximum ICC of 20 μA, contributing to energy-efficient designs.
- Fast Propagation Delay: Typical propagation delay of 11 ns, ensuring quick response times.
- High Output Drive Capability: Outputs can drive up to 10 LSTTL loads and source or sink 4 mA at 5-V VCC.
- Low Input Current: Maximum input leakage current of 1 μA.
Applications
- Microwave Ovens: Used in control circuits for microwave ovens.
- Printers: Employed in printer control and interface circuits.
- UPS and AC Inverter Drives: Utilized in power supply and inverter control systems.
- AC Servo Drives and Motor Drives: Applied in servo and motor control systems.
- Other Industrial and Consumer Electronics: Suitable for various inverting buffer type functions in industrial and consumer electronics.
Q & A
- What is the operating voltage range of the SN74HC14DB?
The SN74HC14DB operates over a voltage range of 2 V to 6 V.
- What is the purpose of the Schmitt-trigger inputs in the SN74HC14DB?
The Schmitt-trigger inputs are designed to handle noisy or slow input signals, providing a minimum separation between positive and negative switching thresholds.
- How many independent inverters does the SN74HC14DB contain?
The SN74HC14DB contains six independent inverters.
- What is the typical propagation delay of the SN74HC14DB?
The typical propagation delay is 11 ns.
- How much current can the outputs of the SN74HC14DB source or sink?
The outputs can source or sink up to 4 mA at 5-V VCC.
- What is the maximum input leakage current of the SN74HC14DB?
The maximum input leakage current is 1 μA.
- In what types of packages is the SN74HC14DB available?
The SN74HC14DB is available in SOIC, SSOP, PDIP, SO, and TSSOP packages.
- What are some common applications of the SN74HC14DB?
Common applications include microwave ovens, printers, UPS and AC inverter drives, AC servo drives, and other industrial and consumer electronics.
- How does the SN74HC14DB handle noisy input signals?
The Schmitt-trigger inputs of the SN74HC14DB are designed to handle noisy or slow input signals by providing a minimum separation between positive and negative switching thresholds.
- What is the maximum power consumption of the SN74HC14DB?
The maximum power consumption (ICC) is 20 μA.
