The 74HC132 is a specific integrated circuit that contains four NAND Schmitt trigger gates, each with two inputs and one output. It is designed to operate on a 5-volt power supply and can handle data rates of up to 125 megabits per second. The chip is commonly used in digital circuits for noise filtering, debouncing, and waveform shaping.
- 1 x 74HC132 NAND Schmitt Trigger Gates IC
- Quad NAND gate with Schmitt-trigger inputs
- Low-power consumption
- TTL-compatible inputs
- High-speed operation
- Wide operating voltage range (2V to 6V)
- High noise immunity
- Balanced propagation delay and transition times
- Complies with JEDEC standard no. 7A
- RoHS compliant
the NAND Schmitt trigger is a type of logic gate that has two or more inputs and one output. It produces an output signal only when all of its input signals are low, and produces a low output signal otherwise. The Schmitt trigger part of the circuit ensures that the output signal is a stable and clean digital signal, even if the input signal is noisy or has a slow transition. The 74HC132 is a specific integrated circuit that contains four NAND Schmitt trigger gates, each with two inputs and one output. It is designed to operate on a 5-volt power supply and can handle data rates of up to 125 megabits per second. The chip is commonly used in digital circuits for noise filtering, debouncing, and waveform shaping.
Principle of Work:
The 74HC132 works by implementing NAND Schmitt triggers, which are a combination of two logic gates: a NAND gate and a Schmitt trigger. Each of the four NAND Schmitt trigger gates in the 74HC132 chip has two inputs and one output.
- When both inputs of a NAND gate are high, its output is low, otherwise, its output is high. A Schmitt trigger is a circuit that provides hysteresis, which means it has different threshold levels for rising and falling input signals. This helps to filter out the noise and stabilize the output signal. In a NAND Schmitt trigger, the inputs are connected to the NAND gate, and the output of the NAND gate is connected to the input of the Schmitt trigger. The Schmitt trigger's output is then connected back to the input of the NAND gate. This forms a feedback loop that creates hysteresis, making the circuit less sensitive to small fluctuations in the input signal.
- When both inputs of the NAND Schmitt trigger are low, the output of the NAND gate is high, which causes the output of the Schmitt trigger to be low. This creates a stable state where the output is low.
- When either or both inputs of the NAND Schmitt trigger become high, the output of the NAND gate becomes low, which causes the output of the Schmitt to trigger to switch to its high state. The high output of the Schmitt trigger then feeds back to the NAND gate, causing the output of the NAND gate to become low. This creates a stable state where the output is high.
Pinout of the Module:
Starting from the top left corner, the pins are numbered sequentially from 1 to 14. Here's a brief description of each pin:
- Pin 1: Input A for Gate 1
- Pin 2: Input B for Gate 1
- Pin 3: Output for Gate 1
- Pin 4: Input A for Gate 2
- Pin 5: Input B for Gate 2
- Pin 6: Output for Gate 2
- Pin 7: Ground (GND)
- Pin 8: Input A for Gate 3
- Pin 9: Input B for Gate 3
- Pin 10: Output for Gate 3
- Pin 11: Input A for Gate 4
- Pin 12: Input B for Gate 4
- Pin 13: Output for Gate 4
- Pin 14: Positive power supply (VCC)
Each of the four NAND Schmitt trigger gates in the 74HC132 chip has two inputs and one output. The inputs for each gate (pins 1-2, 4-5, 8-9, and 11-12) are connected to the NAND gate, and the outputs for each gate (pins 3, 6, 10, and 13) are connected to the output of the Schmitt trigger. The ground pin (pin 7) is connected to the circuit's ground, which is typically the negative terminal of the power supply. The positive power supply pin (pin 14) is connected to the circuit's power source, which is typically the positive terminal of the power supply. The 74HC132 is designed to operate on a 5-volt power supply, although it can also operate at lower voltages.
- Oscillators: The 74HC132 can be used to build astable multivibrator oscillators, which are electronic circuits that generate a continuous stream of square wave signals.
- Signal conditioning: The Schmitt trigger functionality of the 74HC132 can be used to condition noisy digital signals by filtering out unwanted fluctuations or "bounce" in the signal.
- Clock generation: The 74HC132 can be used to generate clock signals for digital circuits. By adjusting the resistor and capacitor values in the feedback loop, the frequency of the output signal can be controlled.
- Switch debouncing: When a switch is opened or closed, it can produce multiple signal transitions due to contact bounce. The 74HC132 can be used to debounce these signals by filtering out the extraneous transitions and producing a clean output signal.
- Logic-level conversion: The 74HC132 can be used to convert between different logic voltage levels, for example, between 3.3V and 5V logic levels.
- Data transmission: The 74HC132 can be used to transmit and receive digital signals over long distances. By using the output of the Schmitt trigger as the input to a driver circuit, the signal can be boosted and transmitted over a longer distance.
The voltage doubler circuit is a simple and cost-effective way to double the voltage level of a DC power supply using the 74HC132 or 74HCT132 ICs. Here's how it works:
- The circuit consists of two capacitors (C4 and C5) and two diodes (D1 and D2) connected in a configuration known as a voltage doubler. When a square wave clock signal (CLK) is applied to the input of one of the gates of the 74HC132, the output of the gate alternates between high and low states at the frequency of the clock signal.
- When the output of the gate is high, capacitor C4 charges up to the voltage level of the power supply. When the output of the gate switches to low, diode D1 becomes forward-biased and allows current to flow through capacitor C5, which charges up to the voltage level of capacitor C4 plus the forward voltage drop of diode D1.
- When the output of the gate switches back to high, capacitor C5 discharges through diode D2 and charges up capacitor C4 to twice the voltage level of the power supply. This cycle repeats with each clock pulse, resulting in an output voltage that is twice the input voltage.
- If you want to create a power oscillator using an unused gate, you can add a resistor (R1) and capacitor (C3) in a feedback loop between the output and input of the gate. This creates a simple oscillator that generates a square wave signal at the frequency determined by the resistor and capacitor values.
- The output voltage of the voltage doubler circuit can be smoothed using a capacitor (C6) connected in parallel with the load. This reduces any ripple in the output voltage and provides a more stable DC voltage source.
no library Installation is needed.
No code was used.
- Logic Family: 74HC
- Number of Gates: 4
- Supply Voltage Range: 2V to 6V
- Logic Voltage Level (High): 4.5V min, 5.2V typ, 5.9V max
- Logic Voltage Level (Low): 0.8V max
- Input Capacitance: 3pF
- Output Capacitance: 15pF
- Propagation Delay Time: 15 ns max at VCC = 2V, 9 ns max at VCC = 4.5V, 8 ns max at VCC = 6V
- Operating Temperature Range: -40°C to +125°C
- Pin Count: 14
The 74HC132 and 74HC14 are both members of the 74HC logic family and are similar in many ways, but they have some key differences:
- Functionality: The 74HC14 is a hex inverter with Schmitt-trigger inputs, meaning that each of its six gates takes an input signal and produces an inverted output signal, and the inputs have Schmitt-trigger hysteresis for noise immunity. The 74HC132, on the other hand, is a quad NAND Schmitt trigger, meaning that it has four NAND gates with Schmitt-trigger inputs.
- The number of gates: The 74HC14 has six gates, while the 74HC132 has only four gates.
- Supply voltage range: Both chips have a supply voltage range of 2V to 6V, but the 74HC132 has a wider range of recommended operating voltages, from 4.5V to 6V, while the 74HC14 has a tighter recommended operating voltage range of 4.5V to 5.5V.
- Propagation delay time: The 74HC14 has a propagation delay time of 13 ns max at VCC = 2V, 9 ns max at VCC = 4.5V, and 8 ns max at VCC = 6V. The 74HC132 has a slightly longer propagation delay time of 15 ns max at VCC = 2V, 9 ns max at VCC = 4.5V, and 8 ns max at VCC = 6V.