75107B - TTL-Compatible High-Speed Open-Collector Output Logic Gate

Overview

The 75107B is a high-speed, TTL-compatible logic gate featuring an open-collector output configuration. This component is designed for applications requiring dot-AND logic configurations, where multiple open-collector outputs can be wire-ANDed together to implement additional logic levels. The 75107B is optimized for performance in high-speed digital systems while maintaining compatibility with standard TTL logic levels.

This device is particularly useful in bus-oriented systems and other applications where multiple drivers need to share a common line. The open-collector architecture provides flexibility in implementing wired logic while maintaining excellent signal integrity at high speeds.

Key Features

• TTL-Compatible Inputs/Outputs: Fully compatible with standard TTL logic levels for easy integration into existing systems
• High-Speed Operation: Optimized for fast switching times in digital applications
• Open-Collector Output: Allows for wired-AND logic configurations and bus sharing
• Dot-AND Capable: Multiple outputs can be connected together to implement additional logic functions
• Robust Design: Features improved noise immunity and signal integrity
• Wide Operating Voltage Range: Compatible with various system voltages
• Temperature-Stable Operation: Maintains consistent performance across operating temperature ranges

Applications

The 75107B is suitable for a wide range of digital logic applications, including:

• Bus-oriented systems and shared communication lines
• Wired-AND logic implementations
• Interfacing between different logic families
• Level shifting applications
• Signal gating and routing
• Parallel data transmission systems
• Interrupt and control signal distribution
• Backplane driving applications

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): 7V
• Input Voltage: 5.5V
• Output Voltage: 15V (open-collector)
• Operating Temperature Range: -55°C to +125°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): 4.75V to 5.25V
• High-Level Input Voltage: 2V min
• Low-Level Input Voltage: 0.8V max
• Operating Temperature: 0°C to 70°C (commercial grade)

DC Characteristics

• Input High Current (IIH): 40μA max @ VIN = 2.7V
• Input Low Current (IIL): -1.6mA max @ VIN = 0.4V
• Output High Voltage (VOH): 2.4V min (with external pull-up)
• Output Low Voltage (VOL): 0.4V max @ IOL = 16mA
• Output Leakage Current (IOZ): 100μA max @ VOUT = 15V

AC Characteristics

• Propagation Delay (tPLH): 15ns max
• Propagation Delay (tPHL): 15ns max
• Output Transition Time: 15ns max
• Power Dissipation: 50mW typical per gate

Functional Description

The 75107B operates as a standard logic gate with open-collector output. When the input conditions are met, the output transistor turns on, pulling the output line low. When the output is off, the line is pulled high through an external resistor (not included in the package). This configuration allows multiple outputs to be connected together to form a wired-AND function, where the common line will be low if any of the connected outputs are active.

The device features TTL-compatible inputs, meaning it can be driven directly by standard TTL logic outputs. The high-speed operation makes it suitable for clock distribution and other timing-critical applications.

Package Information

Available Packages

• 14-Pin Plastic DIP (N Package): Standard through-hole package for prototyping and general use
• 14-Pin Ceramic DIP (J Package): High-reliability package for military and industrial applications
• 14-Pin SOIC (D Package): Surface-mount package for space-constrained applications

Package Dimensions

• Plastic DIP: 19.3mm x 6.35mm body, 2.54mm pin spacing
• Ceramic DIP: 19.05mm x 6.67mm body, 2.54mm pin spacing
• SOIC: 8.65mm x 3.9mm body, 1.27mm pin spacing

Pin Configuration

The 75107B is typically packaged in a 14-pin configuration with the following pinout:

• Pin 1: Input A
• Pin 2: Input B
• Pin 3: Output Y
• Pin 4: Ground
• Pin 5: Input C
• Pin 6: Input D
• Pin 7: Output Z
• Pin 8: Vcc
• Pins 9-14: Additional inputs/outputs as per configuration

Design Considerations

External Pull-Up Resistor Selection

When using the open-collector outputs, an external pull-up resistor must be selected based on:

• Desired rise time of the output signal
• Total capacitive load on the line
• Number of devices connected to the bus
• Power consumption requirements

Power Supply Decoupling

For optimal performance in high-speed applications:

• Use a 0.1μF ceramic capacitor close to the Vcc pin
• For systems with multiple 75107B devices, use a bulk capacitor (10μF to 100μF) near the power entry point

Thermal Considerations

While the 75107B has relatively low power dissipation, in high-density applications:

• Ensure adequate airflow around components
• Consider using the SOIC package for better thermal performance in surface-mount applications
• Monitor junction temperatures in high-temperature environments

Reliability and Quality

The 75107B is manufactured under strict quality control standards and undergoes rigorous testing to ensure:

• High mean time between failures (MTBF)
• Consistent performance across production lots
• Compliance with relevant industry standards
• Long-term reliability in harsh operating conditions

Ordering Information

The 75107B is available in various package and temperature range options. The