Overview
The SN7400NSRE4, manufactured by Texas Instruments, is a quad 2-input NAND gate integrated circuit (IC) that is part of the 7400 series of Transistor-Transistor Logic (TTL) chips. This IC contains four independent NAND gates, each with two inputs, making it a versatile component in digital logic circuits. It operates within the TTL logic family and is widely used in various digital applications due to its reliability and efficiency.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (Vcc) | 4.75V to 5.25V |
| Input Voltage (VIH) | 2V (minimum) |
| Input Voltage (VIL) | 0.8V (maximum) |
| Output Voltage (VOH) | 2.4V (minimum) |
| Output Voltage (VOL) | 0.4V (maximum) |
| High-Level Output Current (IOH) | -0.4mA |
| Low-Level Output Current (IOL) | 16mA |
| Power Dissipation | 1.0W (maximum) |
| Operating Temperature | 0°C to 70°C |
Key Features
- Contains four independent 2-input NAND gates.
- Inputs are TTL compliant with VIH = 2 V and VIL = 0.8 V.
- Inputs can accept 3.3-V or 2.5-V logic inputs.
- Available in various package options including Plastic Small-Outline, Shrink Small-Outline, Ceramic Flat, and Standard Plastic.
- Unbalanced output drive with specified IOL and IOH.
Applications
- AV Receivers
- Portable Audio Docks
- Blu-Ray Players
- Home Theater Systems
- MP3 Players or Recorders
- Personal Digital Assistants (PDAs)
- Error indicators in digital systems.
Q & A
- Q: Can I use the SN7400N with a 3.3V power supply?
A: No, the SN7400N requires a supply voltage between 4.75V and 5.25V to operate correctly. - Q: How do I connect multiple SN7400N ICs in a circuit?
A: Multiple SN7400N ICs can be connected by ensuring each IC has its own power supply and ground connections, and by connecting the outputs and inputs as required by the logic circuit design. - Q: What is the maximum frequency the SN7400N can handle?
A: The maximum frequency depends on the specific operating conditions, but typically, the propagation delay for the SN7400N is around 11-22 ns. - Q: What are the input voltage levels for the SN7400N?
A: The input voltage levels are VIH = 2 V (minimum) and VIL = 0.8 V (maximum). - Q: What is the power dissipation of the SN7400N?
A: The maximum power dissipation for the SN7400N is 1.0W. - Q: What are the package options available for the SN7400N?
A: The SN7400N is available in various packages including Plastic Small-Outline, Shrink Small-Outline, Ceramic Flat, and Standard Plastic. - Q: Can the SN7400N operate in military temperature ranges?
A: The SN7400N itself is rated for 0°C to 70°C, but other variants like SN54xx00 are rated for –55°C to 125°C. - Q: How do I prevent power disturbances in the SN7400N circuit?
A: Use bypass capacitors close to the power pins to prevent power disturbances. A 0.1 µF and a 1 µF capacitor in parallel are commonly used. - Q: What is the Boolean function performed by the SN7400N?
A: The SN7400N performs the Boolean function Y = A . B or Y = A + B in positive logic. - Q: Can the inputs of the SN7400N handle voltages greater than 5.5V?
A: No, the inputs should not be subjected to voltages greater than 5.5V to avoid damage).
