The HD74LS13P manufactured by Hitachi is a Dual 4-Input NAND Schmitt Trigger. This device incorporates two independent 4-input NAND gates with Schmitt trigger inputs. The Schmitt trigger action provides different threshold levels for positive-going and negative-going signals, offering hysteresis. This makes the HD74LS13P highly resistant to noise and suitable for applications where input signals may be slow or noisy. It is commonly used in wave shaping, pulse squaring, and general logic circuits.

Applications:

• Wave shaping
• Pulse squaring
• Noise suppression
• Line receivers
• Clock oscillators
• General logic circuits

Features:

• Dual 4-input NAND gates
• Schmitt trigger inputs
• High noise immunity
• Standard TTL logic levels
• Operating Voltage of 5V

Benefits:

• Improved noise immunity compared to standard NAND gates
• Clean and sharp output signals even with noisy inputs
• Simplified circuit design for applications requiring noise suppression
• Direct replacement for standard TTL NAND gates in many applications

Technical Specifications:

Manufacturer: Hitachi, Ltd
Logic Family: LS (Low-power Schottky TTL)
Function: Dual 4-Input NAND Schmitt Trigger
Number of Gates: 2
Inputs per Gate: 4
Threshold Voltage (Positive-Going): Typically 1.7V
Threshold Voltage (Negative-Going): Typically 0.9V
Hysteresis Voltage: Typically 0.8V
Supply Voltage: 5V
Operating Temperature: 0°C to +70°C
Package: Through Hole

The HD74LS13P’s Schmitt trigger inputs provide superior noise immunity, making it a reliable choice for applications where input signals are susceptible to noise or slow transitions. It is pin-compatible with standard TTL NAND gates, simplifying its integration into existing circuits.