LM361N High-Speed Differential Comparator

Overview

The LM361N is a high-speed differential input comparator with complementary TTL outputs, designed as an enhanced replacement for the SE529/NE529 series. This device offers superior speed performance and reduced input offset voltage, making it ideal for precision timing and signal comparison applications. The LM361N operates effectively across a wide range of supply voltages, including standard op-amp supplies (±15V), and features minimal propagation delay variation under varying overdrive conditions.

Features

• High-Speed Operation: Optimized for rapid response with minimal propagation delay.
• Differential Input: Supports differential signal comparison for enhanced noise immunity.
• Complementary TTL Outputs: Provides both inverting and non-inverting outputs for flexible system integration.
• Low Input Offset Voltage: Improved accuracy in comparison tasks.
• Wide Supply Voltage Range: Operates from ±15V, compatible with standard op-amp power supplies.
• Stable Performance: Propagation delay varies only 3 ns for overdrive variations from 5 mV to 500 mV.
• Independent Strobes: Allows for precise control over the comparison timing.
• Pin-for-Pin Replacement: Direct drop-in replacement for SE529/NE529 comparators.

Applications

The LM361N is suited for a variety of high-speed and precision applications, including:

• High-speed timing circuits
• Pulse-width modulation (PWM) systems
• Analog-to-digital converters (ADCs)
• Signal conditioning circuits
• Voltage level detection
• Oscillators and clock recovery circuits
• Communication systems

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): ±18V
• Input Voltage: ±15V
• Output Sink Current: 50 mA
• Operating Temperature Range: 0°C to +70°C
• Storage Temperature Range: -65°C to +150°C

Typical Performance Characteristics

• Propagation Delay: 3 ns (for 5 mV to 500 mV overdrive)
• Input Offset Voltage: 2 mV (max)
• Input Bias Current: 10 µA (max)
• Output Rise/Fall Time: 1.5 ns (typical)
• Power Consumption: 50 mW (typical)

Package Information

The LM361N is available in a standard 8-pin DIP (Dual In-line Package) configuration. The package is designed for through-hole mounting, ensuring robust mechanical and electrical connections in a variety of environments.

Package Dimensions

• Package Type: 8-Pin DIP (N)
• Length: 9.81 mm (max)
• Width: 6.35 mm (max)
• Height: 4.57 mm (max)
• Pin Spacing: 2.54 mm (standard)

Pin Configuration

• Pin 1: Non-Inverting Input (IN+)
• Pin 2: Inverting Input (IN-)
• Pin 3: Strobe (STRB)
• Pin 4: Ground (GND)
• Pin 5: Complementary Output (Q̅)
• Pin 6: Output (Q)
• Pin 7: VCC+ (Positive Supply)
• Pin 8: VCC- (Negative Supply)

Conclusion

The LM361N is a versatile and high-performance comparator, offering exceptional speed and precision for demanding applications. Its compatibility with existing designs (as a drop-in replacement for SE529/NE529) and robust electrical characteristics make it a preferred choice for engineers working in high-speed signal processing, communication systems, and precision timing circuits. The detailed specifications and package information provided ensure seamless integration into a wide range of electronic systems.