74HC240PW,118 Octal Buffer/Line Driver – 3-State Inverting (TSSOP-20)

Description

The 74HC240PW,118 is a high-speed Si-gate CMOS octal buffer and line driver designed for 3-state output applications. This IC features two sets of four buffers, each controlled by separate output enable (OE) inputs. It performs an inverting function, meaning the output is the logical inverse of the input when the device is enabled. The 3-state outputs make it an ideal choice for bus-oriented systems, where multiple devices need to share a common data path without signal contention.

As part of the 74HC series, this device provides high noise immunity and low power consumption while maintaining the drive capability required for high-fanout digital logic designs. Its inverting output configuration is particularly useful in systems requiring inverted logic control or signal inversion for bus-level matching.

Note: Product images are for illustrative purposes only. Please refer to the official NXP (or equivalent manufacturer) datasheet for detailed timing characteristics, propagation delays, and specific input/output current ratings for your high-speed logic application.

Features

• Octal Buffer Function: Provides eight independent buffers in a single compact 20-pin package.
• 3-State Outputs: Allows for direct connection to data buses; outputs can be placed in a high-impedance (Hi-Z) state.
• Inverting Logic: Outputs represent the inverse of the input signal, perfect for logic inversion tasks.
• High Drive Capability: Capable of driving high-capacitance loads, common in bus-based system designs.
• CMOS Efficiency: Optimized for low power consumption while remaining compatible with standard CMOS logic levels.
• Package: TSSOP-20 (SMD) for space-constrained PCB layouts.

Benefits

• Bus Conflict Prevention: 3-state outputs prevent electrical shorting when multiple drivers share a single bus line.
• Design Flexibility: Independent output enable (OE) pins allow for modular control of two separate 4-bit data ports.
• System Reliability: Excellent noise immunity ensures data integrity in environments with high electromagnetic interference.

Applications

• Data Bus Drivers: Managing flow of data between CPUs, memory, and peripherals.
• Signal Inversion: Providing inverted signals for control systems or logical polarity adjustment.
• Buffer/Repeater: Extending the drive capability for long-trace signal paths on a PCB.
• Microprocessor Interfacing: Buffering address or data lines for expanded memory modules.

Package Includes

• 1 x 74HC240PW,118 Octal Buffer/Line Driver IC (SMD-20)

Specifications