Overview
The SN74AC14PWR, produced by Texas Instruments, is a hex Schmitt-trigger inverter integrated circuit. This device is part of the 74AC series, known for its high-speed CMOS logic. It features six independent inverter circuits, each with Schmitt-trigger inputs, which provide hysteresis to improve noise immunity and prevent multiple transitions on slow input signals.
The SN74AC14PWR operates over a wide voltage range of 2V to 6V, making it versatile for various applications. It is particularly useful in scenarios where clean, jitter-free output signals are required, even from slow input ramps.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| VCC Operation | - | V | 2 | - | 6 |
| Input Voltage | - | V | - | - | 6 |
| Propagation Delay (tPLH) | VCC = 5V, TA = 25°C | ns | 1.5 | 5 | 10 |
| Propagation Delay (tPHL) | VCC = 5V, TA = 25°C | ns | 1.5 | 5 | 8.5 |
| Operating Temperature | - | °C | -40 | - | 85 |
| Junction-to-Ambient Thermal Resistance (RθJA) | TSSOP Package | °C/W | - | - | 92.4 |
| Power Dissipation Capacitance (Cpd) | VCC = 5V, TA = 25°C, CL = 50 pF, f = 1 MHz | pF | - | 25 | - |
Key Features
- VCC Operation Range: The device operates over a voltage range of 2V to 6V, allowing for flexibility in different system designs.
- Schmitt-Trigger Inputs: Provides hysteresis to improve noise immunity and prevent multiple transitions on slow input signals.
- Temperature Compensated: Ensures stable operation over a wide temperature range.
- Balanced CMOS Push-Pull Outputs: Capable of sinking and sourcing similar currents, reducing output ringing and overshoot.
- Input Voltage Tolerance: Inputs can accept voltages up to 6V, making it suitable for voltage translation applications.
- Low Drive and Slow Edge Rates: Minimizes output ringing and overshoot, ideal for bus interface applications.
Applications
- Synchronize Inverted Clock Inputs: Useful in clock signal synchronization to ensure clean and stable clock signals.
- Debounce Switches: The Schmitt-trigger action helps in debouncing switches by filtering out noise and providing a clean output signal.
- Invert Digital Signals: Can be used to invert digital signals in various digital circuits.
- Bus Interface Applications: Ideal for applications where output ringing is a concern, such as in D-Type flip-flops, counters, and other digital logic circuits.
Q & A
- What is the operating voltage range of the SN74AC14PWR?
The SN74AC14PWR operates over a voltage range of 2V to 6V.
- What is the purpose of the Schmitt-trigger inputs in the SN74AC14PWR?
The Schmitt-trigger inputs provide hysteresis to improve noise immunity and prevent multiple transitions on slow input signals.
- What are the typical propagation delays for the SN74AC14PWR at VCC = 5V?
The typical propagation delays are 5 ns for both tPLH and tPHL at VCC = 5V and TA = 25°C.
- What is the maximum operating temperature for the SN74AC14PWR?
The maximum operating temperature is 85°C.
- How many independent inverter circuits does the SN74AC14PWR contain?
The SN74AC14PWR contains six independent inverter circuits.
- What is the significance of balanced CMOS push-pull outputs in the SN74AC14PWR?
The balanced CMOS push-pull outputs can sink and source similar currents, reducing output ringing and overshoot.
- Can the inputs of the SN74AC14PWR accept voltages higher than VCC?
Yes, the inputs can accept voltages up to 6V, making it suitable for voltage translation applications.
- What are some common applications of the SN74AC14PWR?
Common applications include synchronizing inverted clock inputs, debouncing switches, inverting digital signals, and bus interface applications.
- How should unused push-pull CMOS outputs be handled?
Unused push-pull CMOS outputs must be left disconnected to prevent any potential issues.
- What is the recommended load current per output for the SN74AC14PWR?
The recommended load current per output should not exceed 35 mA, with a total limit of 70 mA for the entire part.
