The MC14093BAL is a Quad 2-Input NAND Schmitt Trigger, manufactured by Freescale Semiconductor (now NXP). This device contains four independent 2-input NAND gates, each with Schmitt-trigger action. A Schmitt trigger provides hysteresis, making the gate less susceptible to noise and producing cleaner, more stable output signals, particularly with slow or noisy input signals.

Applications:

• Wave shaping circuits
• Debouncing switches and relays
• Pulse shaping
• Threshold detectors
• Logic circuits in noisy environments
• Oscillators
• Monostable multivibrators

Features:

• Quad 2-input NAND gates
• Schmitt-trigger inputs for noise immunity
• CMOS logic for low power consumption
• High noise immunity
• Wide operating voltage range (3V to 15V typical)
• Standardized symmetrical output characteristics
• Operating temperature range: -55°C to +125°C

Benefits:

• Provides clean, stable output signals even with noisy or slow-changing inputs
• Prevents false triggering due to noise
• Low power consumption makes it suitable for battery-powered applications
• High noise immunity ensures reliable operation in noisy environments
• Wide operating voltage range provides flexibility in power supply selection

Additional Details:

The MC14093BAL is typically supplied in a 14-pin DIP (Dual In-line Package) or SOIC package. The Schmitt trigger action is characterized by two threshold voltages: a positive-going threshold (VT+) and a negative-going threshold (VT-). The difference between these thresholds is the hysteresis voltage. Refer to the datasheet for specific values of VT+, VT-, and hysteresis voltage. The hysteresis is a key characteristic that makes the device suitable for noisy signal processing. The Schmitt trigger action eliminates chatter in switch applications. The device finds use in signal conditioning and waveform shaping circuits.