74LS128 DIP Quad 2-input NOR Line Driver
The 74LS128 is a high speed TTL integrated circuit containing four independent 2-input NOR gates specifically designed for line driving applications. Unlike standard logic gates, this line driver is engineered to provide higher output current, allowing it to drive low impedance loads such as coaxial cables, twisted pairs, or highly capacitive backplanes without significant signal degradation.
This IC is ideal for clock distribution and data transmission across long PCB traces where maintaining signal integrity is critical. Each gate performs the NOR logic function, providing a low output only when one or both inputs are high. The low power Schottky technology ensures that the device maintains high switching speeds while providing the robust drive capability necessary for modern digital communication and interfacing tasks.
KEY FEATURES
- Quad independent 2-input NOR gates in one package
- High current output specifically for line driving
- Capable of driving low impedance and capacitive loads
- Low power Schottky design for high speed performance
- Excellent noise immunity for stable data transmission
- Standard 14 pin dual in line package
SPECIFICATIONS
- Supply Voltage 4.75V to 5.25V
- Operating Temperature 0 to 70 Celsius
- Logic Type TTL Low Power Schottky
- Propagation Delay 12ns
- High Level Output Current -42.4mA
- Low Level Output Current 48mA
- Input Voltage High 2.0V Minimum
INTERFACES
- 1A Gate 1 first input
- 1B Gate 1 second input
- 1Y Gate 1 line driver output
- 2A Gate 2 first input
- 2B Gate 2 second input
- 2Y Gate 2 line driver output
- 3A Gate 3 first input
- 3B Gate 3 second input
- 3Y Gate 3 line driver output
- 4A Gate 4 first input
- 4B Gate 4 second input
- 4Y Gate 4 line driver output
- VCC Positive supply voltage
- GND Ground reference
