Overview
The SN74ACT14DRG4, produced by Texas Instruments, is a hex Schmitt-trigger inverter integrated circuit. This device contains six independent inverters and performs the Boolean function Y = A. It is designed to operate within a voltage range of 4.5V to 5.5V, making it suitable for various digital logic applications. The SN74ACT14DRG4 is particularly useful due to its Schmitt-trigger action, which provides different input threshold levels for positive-going and negative-going signals, resulting in clean, jitter-free output signals even with slow input ramps.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | 4.5 | 5.5 | V | ||
| VI (Input Voltage) | 0 | VCC | V | ||
| VO (Output Voltage) | 0 | VCC | V | ||
| IOH (High-Level Output Current) | -24 | -24 | mA | ||
| IOL (Low-Level Output Current) | 24 | 24 | mA | ||
| TA (Operating Free-Air Temperature) | -40 | 85 | °C | ||
| VT+ (Positive-Going Threshold) | VCC = 4.5V | 1.2 | 1.5 | 1.9 | V |
| VT+ (Positive-Going Threshold) | VCC = 5.5V | 1.4 | 1.7 | 2.1 | V |
| VT- (Negative-Going Threshold) | VCC = 4.5V | 0.5 | 0.9 | 1.2 | V |
| VT- (Negative-Going Threshold) | VCC = 5.5V | 0.6 | 1 | 1.4 | V |
| ∆VT (Hysteresis) | VCC = 4.5V | 0.4 | 0.6 | 1.4 | V |
| ∆VT (Hysteresis) | VCC = 5.5V | 0.4 | 0.6 | 1.4 | V |
Key Features
- Schmitt-Trigger Action: Provides different input threshold levels for positive-going and negative-going signals, ensuring clean, jitter-free output signals.
- Temperature Compensation: The circuits are temperature compensated, allowing them to be triggered from the slowest of input ramps.
- Greater Noise Margin: Offers a greater noise margin compared to conventional inverters.
- Input Voltage Tolerance: Inputs are tolerant to 5.5V at any valid VCC, making it ideal for voltage translation.
- Balanced CMOS Push-Pull Outputs: The device includes balanced CMOS push-pull outputs that can sink and source similar currents.
- Slow Edge Rates: Minimizes output ringing and overshoot.
- TTL-Voltage Compatible Inputs: Inputs are compatible with TTL voltage levels.
Applications
- Synchronize Inverted Clock Inputs: Useful in synchronizing clock signals to ensure proper timing in digital circuits.
- Debounce a Switch: Can be used to debounce switches, eliminating multiple triggers from a single switch press.
- Invert a Digital Signal: Basic function of inverting digital signals in various logic circuits.
- Bus Interface Applications: Suitable for bus interface type applications where output ringing is a concern.
- D-Type Flip-Flop and Counter Circuits: Can be used in more complex digital circuits such as D-type flip-flops and counters.
Q & A
- What is the operating voltage range of the SN74ACT14DRG4?
The operating voltage range is from 4.5V to 5.5V.
- What is the purpose of the Schmitt-trigger action in this device?
The Schmitt-trigger action provides different input threshold levels for positive-going and negative-going signals, ensuring clean, jitter-free output signals.
- What are the typical applications of the SN74ACT14DRG4?
Typical applications include synchronizing inverted clock inputs, debouncing switches, inverting digital signals, and bus interface applications.
- How many independent inverters does the SN74ACT14DRG4 contain?
The device contains six independent inverters.
- What is the maximum high-level output current of the SN74ACT14DRG4?
The maximum high-level output current is -24 mA.
- What is the operating temperature range of the SN74ACT14DRG4?
The operating temperature range is from -40°C to 85°C.
- Are the inputs of the SN74ACT14DRG4 TTL-voltage compatible?
- How does the device handle slow input ramps?
The device can be triggered from the slowest of input ramps and still provide clean, jitter-free output signals.
- What should be done with unused push-pull CMOS outputs?
Unused push-pull CMOS outputs must be left disconnected.
- What is the significance of the balanced CMOS push-pull outputs?
The balanced CMOS push-pull outputs can sink and source similar currents, ensuring balanced drive capability.
