Overview
The SN74AC14PWRE4 is a hex Schmitt-trigger inverter integrated circuit produced by Texas Instruments. This device contains six independent inverters that perform the Boolean function Y = A, utilizing Schmitt action to provide different input threshold levels for positive-going (VT+) and negative-going (VT−) signals. The SN74AC14PWRE4 is temperature compensated, allowing it to be triggered from the slowest of input ramps while producing clean, jitter-free output signals. It also features a greater noise margin compared to conventional inverters.
Key Specifications
| Parameter | Test Conditions | Unit | MIN | TYP | MAX |
|---|---|---|---|---|---|
| VCC | Operating Voltage | V | 3.0 | 5.0 | 5.5 |
| VT+ | Positive-going Threshold (VCC = 5 V) | V | 1.6 | 3.2 | 3.9 |
| VT- | Negative-going Threshold (VCC = 5 V) | V | 1.1 | 1.8 | 2.3 |
| tPLH | Propagation Delay Time (A to Y) | ns | 1.5 | 5 | 10 |
| tPHL | Propagation Delay Time (A to Y) | ns | 1.5 | 5 | 8.5 |
| IOL | Low-level Output Current (VCC = 5.5 V) | mA | 24 | ||
| TA | Operating Free-Air Temperature | °C | -40 | 85 | |
| RθJA | Junction-to-Ambient Thermal Resistance (TSSOP) | °C/W | 92.4 |
Key Features
- Temperature Compensation: The device is temperature compensated, ensuring stable operation across a wide temperature range.
- Schmitt Action: Provides different input threshold levels for positive-going and negative-going signals, enhancing noise immunity.
- CMOS Technology: Utilizes CMOS technology for low power consumption and high noise margin.
- Balanced CMOS Push-Pull Outputs: Outputs can sink and source similar currents, reducing bus contention and output ringing.
- Input Tolerance: Inputs are tolerant to 5.5 V at any valid VCC, allowing for voltage translation from 3.3 V to 5 V.
- Slow Edge Rates: Minimizes output ringing and overshoot, making it suitable for bus interface applications.
Applications
The SN74AC14PWRE4 is suitable for a variety of applications where low drive and minimal output ringing are crucial. Some typical applications include:
- Bus Interface Applications: Ideal for interfaces where output ringing needs to be minimized.
- Logic Circuits: Can be used in logic circuits requiring Schmitt-trigger functionality.
- Signal Conditioning: Useful in signal conditioning circuits to improve noise immunity.
- Counters and Flip-Flops: Can be integrated into counter and flip-flop circuits to enhance stability and reduce noise.
Q & A
- What is the primary function of the SN74AC14PWRE4?
The SN74AC14PWRE4 is a hex Schmitt-trigger inverter, performing the Boolean function Y = A.
- What are the key benefits of Schmitt action in this device?
Schmitt action provides different input threshold levels for positive-going and negative-going signals, enhancing noise immunity and stability.
- What is the operating voltage range of the SN74AC14PWRE4?
The operating voltage range is from 3.0 V to 5.5 V.
- What is the significance of balanced CMOS push-pull outputs?
These outputs can sink and source similar currents, reducing bus contention and output ringing.
- How does the device handle slow input ramps?
The device can be triggered from the slowest of input ramps and still produce clean, jitter-free output signals.
- What are the typical applications of the SN74AC14PWRE4?
Typical applications include bus interface applications, logic circuits, signal conditioning, and counters and flip-flops.
- What is the maximum low-level output current for the SN74AC14PWRE4?
The maximum low-level output current is 24 mA at VCC = 5.5 V.
- What is the operating temperature range of the SN74AC14PWRE4?
The operating temperature range is from -40°C to 85°C.
- How should unused push-pull CMOS outputs be handled?
Unused push-pull CMOS outputs must be left disconnected to avoid potential damage.
- What is the significance of the device's input tolerance to 5.5 V?
The inputs are tolerant to 5.5 V at any valid VCC, allowing for voltage translation from 3.3 V to 5 V.
