Overview
The SN74HCT14PWR 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 in positive logic. The SN74HCT14PWR is part of the 74HCT series, which is designed for use in systems that require TTL-compatible logic levels. It operates within a voltage range of 4.5 V to 5.5 V, making it versatile for various applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Voltage Range | 4.5 | 5.5 | V | ||
| Propagation Delay Time (tpd) | VCC = 4.5 V, TA = 25°C | 20 | 32 | 40 | ns |
| Propagation Delay Time (tpd) | VCC = 5.5 V, TA = 25°C | 18 | 30 | 38 | ns |
| High-Level Output Voltage (VOH) | IOH = –20 µA, VCC = 4.5 V, TA = 25°C | 4.4 | 4.49 | V | |
| Low-Level Output Voltage (VOL) | IOL = 20 µA, VCC = 4.5 V, TA = 25°C | 0.001 | 0.1 | V | |
| Input Current (II) | VI = VCC or GND, VCC = 5.5 V, TA = 25°C | ±0.1 | ±1 | µA | |
| Supply Current (ICC) | VI = VCC or GND, IO = 0, VCC = 5.5 V, TA = 25°C | 2 | 20 | µA | |
| Input Capacitance (Ci) | VI = VCC or GND, VCC = 5 V, TA = 25°C | 3 | 10 | pF | |
| Positive-Going Threshold (VT+) | VCC = 4.5 V, TA = 25°C | 1.2 | 1.5 | 1.9 | V |
| Negative-Going Threshold (VT–) | VCC = 4.5 V, TA = 25°C | 0.5 | 0.9 | 1.2 | V |
| Hysteresis (VT+ – VT–) | VCC = 4.5 V, TA = 25°C | 0.4 | 0.6 | 1.4 | V |
Key Features
- Operating voltage range of 4.5 V to 5.5 V
- Outputs can drive up to 10 LSTTL loads
- Low power consumption: maximum ICC of 20 µA
- Typical propagation delay time of 18 ns at VCC = 5.5 V
- ±4-mA output drive at 5 V
- Maximum low input current of 1 µA
- Inputs are TTL-voltage compatible
- Schmitt-Trigger inputs for noise immunity and hysteresis
Applications
- Uninterruptible Power Supplies (UPS)
- White Goods
- Computer Peripherals
- Printers
- AC Servo Drives
- Desktop Computers
Q & A
- What is the operating voltage range of the SN74HCT14PWR?
The operating voltage range is 4.5 V to 5.5 V.
- How many LSTTL loads can the outputs of the SN74HCT14PWR drive?
The outputs can drive up to 10 LSTTL loads.
- What is the typical propagation delay time of the SN74HCT14PWR at VCC = 5.5 V?
The typical propagation delay time is 30 ns.
- What is the maximum output drive current at 5 V?
The maximum output drive current is ±4 mA.
- Are the inputs of the SN74HCT14PWR TTL-voltage compatible?
Yes, the inputs are TTL-voltage compatible.
- What is the purpose of the Schmitt-Trigger inputs in the SN74HCT14PWR?
The Schmitt-Trigger inputs provide noise immunity and hysteresis, allowing for noisy or slow inputs without causing oscillation or excessive current draw.
- What are some common applications of the SN74HCT14PWR?
Common applications include UPS, white goods, computer peripherals, printers, AC servo drives, and desktop computers.
- What is the maximum supply current of the SN74HCT14PWR at VCC = 5.5 V?
The maximum supply current is 20 µA.
- What is the input capacitance of the SN74HCT14PWR?
The input capacitance is typically 10 pF.
- How does the hysteresis of the Schmitt-Trigger inputs affect the device's operation?
The hysteresis ensures a minimum separation between positive and negative switching thresholds, providing stability against noisy inputs.
