#7407 #hex buffer #driver #open-collector #TTL #logic gate #high-voltage output #7400 series #wired-AND

7407 Hex Buffer/Driver Technical Summary

7407 Hex Buffer/Driver with Open-Collector High-Voltage Outputs

Overview

The 7407 is a hex buffer/driver integrated circuit belonging to the 7400 series of TTL logic devices. It features six independent buffer gates with open-collector high-voltage outputs capable of driving loads up to 30V. Each gate performs the Boolean function Y = A in positive logic. The open-collector outputs make this device particularly useful for interfacing with higher voltage circuits, driving lamps or relays, and performing wired-AND logic functions.

This device is fabricated using bipolar transistor technology and operates with standard TTL power supply voltages (4.75V to 5.25V). The 7407 is available in various package options including PDIP, SOIC, and TSSOP, making it suitable for both through-hole and surface-mount applications.

Features

Six independent buffer gates in single package
Open-collector outputs with 30V voltage rating
High sink current capability (40mA maximum per output)
Standard TTL switching voltages
Inputs compatible with standard TTL outputs
Wide operating temperature range (0°C to +70°C commercial grade)
Available in multiple package options
Compatible with most TTL families
Typical propagation delay of 18ns

Applications

The 7407 finds use in a wide variety of digital and interface applications:

Logic level shifting: Interface between low-voltage logic and higher voltage circuits
LED and lamp drivers: Directly drive indicator lamps and LEDs
Relay and solenoid drivers: Control electromechanical devices
Wired-AND logic: Implement AND functions by connecting multiple open-collector outputs
Bus drivers: Drive bus lines in multi-master systems
General purpose buffering: Isolate signals and increase drive capability
Industrial control systems: Interface between control logic and power circuits