Overview
The MC74AC132D, produced by onsemi, is a Quad 2-Input NAND Schmitt Trigger integrated circuit. This device is part of the high-performance silicon-gate CMOS family and is designed to transform slowly changing input signals into sharply defined, jitter-free output signals. It features four 2-input NAND gates with Schmitt trigger inputs, which provide greater noise margin compared to conventional NAND gates. The Schmitt trigger mechanism uses positive feedback to speed up slow input transitions and offers different input threshold voltages for positive and negative-going transitions, making it insensitive to temperature and supply voltage variations.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC (DC Supply Voltage) | 2.0 to 6.0 | V | |
| VI (DC Input Voltage) | -0.5 to VCC + 0.5 | V | |
| VO (DC Output Voltage) | -0.5 to VCC + 0.5 | V | |
| TA (Operating Ambient Temperature Range) | -40 to 85 | °C | |
| IOH (Output Current - High) | -24 | mA | |
| IOL (Output Current - Low) | 24 | mA | |
| tPLH (Propagation Delay) | 2.0 to 13.0 | ns | VCC @ 3.3 V to 5.5 V, CL = 50 pF |
| tPHL (Propagation Delay) | 2.0 to 15.0 | ns | VCC @ 3.3 V to 5.5 V, CL = 50 pF |
| Vth+ (Maximum Positive Threshold) | 2.2 to 3.9 | V | TA = Worst Case |
| Vth- (Minimum Negative Threshold) | 0.5 to 1.1 | V | TA = Worst Case |
| Vh (Hysteresis) | 0.4 to 1.6 | V | TA = Worst Case |
Key Features
- Schmitt Trigger Inputs: Provides hysteresis to speed up slow input transitions and improve noise immunity.
- Four 2-Input NAND Gates: Each gate can transform slowly changing input signals into sharply defined output signals.
- High Noise Margin: Greater noise margin compared to conventional NAND gates.
- TTL Compatible Inputs (for MC74ACT132): Ensures compatibility with TTL logic levels.
- Pb-Free Devices: Compliant with lead-free manufacturing standards.
- Outputs Source/Sink 24 mA: Capable of driving loads with high current requirements.
Applications
- Digital Signal Processing: Useful in applications where clean, jitter-free signals are necessary.
- Noise Reduction: Effective in environments with high noise levels due to its Schmitt trigger inputs.
- Timing and Synchronization: Can be used in timing circuits to ensure precise signal transitions.
- Interface Circuits: Suitable for interfacing between different logic families due to its TTL compatibility.
- General Logic Circuits: Can be used in a variety of digital logic circuits requiring NAND gate functionality with improved noise immunity.
Q & A
- What is the primary function of the MC74AC132D?
The MC74AC132D is a Quad 2-Input NAND Schmitt Trigger, transforming slowly changing input signals into sharply defined, jitter-free output signals.
- What is the operating voltage range for the MC74AC132D?
The operating voltage range is from 2.0 V to 6.0 V.
- What is the significance of the Schmitt trigger in the MC74AC132D?
The Schmitt trigger provides hysteresis, speeding up slow input transitions and improving noise immunity by offering different input threshold voltages for positive and negative-going transitions.
- Is the MC74AC132D compatible with TTL logic levels?
The MC74ACT132 version is TTL compatible, but the MC74AC132 is not.
- What is the maximum output current of the MC74AC132D?
The device can source or sink up to 24 mA.
- What is the operating temperature range for the MC74AC132D?
The operating temperature range is from -40°C to 85°C.
- Is the MC74AC132D lead-free?
Yes, the MC74AC132D is a Pb-free device.
- What are the typical propagation delays for the MC74AC132D?
The propagation delays range from 2.0 ns to 15.0 ns depending on the supply voltage and load capacitance.
- Can the MC74AC132D be used in noisy environments?
Yes, the Schmitt trigger inputs provide high noise immunity, making it suitable for use in noisy environments.
- Is the MC74AC132D still in production?
No, the MC74AC132D is obsolete and no longer manufactured, but substitutes are available.
