SN74LS240N Octal Buffer Line Driver, DIP20, 5.25V

The SN74LS240N is a versatile Octal Buffer and Line Driver from Texas Instruments, designed to enhance the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. This logic device offers a choice of selected combinations of inverting and non-inverting outputs, along with symmetrical, active-low output-control inputs and complementary output-control inputs, providing flexible design options for a wide range of digital applications.

Featuring high fan-out, improved fan-in, and a 400mV noise margin, the SN74LS240N ensures reliable signal integrity in demanding industrial and communications networking environments. The device is capable of driving terminated lines down to 133Ω, making it suitable for high-speed bus systems. Integrated PNP inputs reduce DC loading, while hysteresis at the inputs improves noise margins, enhancing overall performance and stability.

Key Features

• High fan-out and improved fan-in for robust signal distribution
• 400mV noise margin for reliable operation in noisy environments
• Capable of driving terminated lines down to 133Ω
• TTL input and CMOS output with PNP inputs to reduce DC loading
• Hysteresis at inputs improves noise immunity
• Inverting and non-inverting output options for design flexibility

Specifications

• Logic Device Type: Buffer, Inverting
• Logic Family / Base Number: 74LS240
• Logic Case Style: DIP
• IC Case / Package: DIP
• No. of Pins: 20
• Supply Voltage Min: 4.75V
• Supply Voltage Max: 5.25V
• Operating Temperature Min: 0°C
• Operating Temperature Max: 70°C

This component is ideal for use in industrial control systems, communication interfaces, and bus-oriented applications where high-performance line driving and signal conditioning are essential.