A126 Philips HEF4093BP Quad 2-Input NAND Schmitt Trigger IC, CMOS Logic, 14-Pin DIP (CD4093B Equivalent)

The HEF4093BP is a high-performance CMOS integrated circuit featuring four NAND gates, each with Schmitt-trigger action on both inputs. Unlike standard logic gates, the Schmitt trigger provides "hysteresis," meaning it switches at different voltage levels for positive-going and negative-going signals. This makes it incredibly effective at transforming slowly changing or noisy analog signals into sharp, clean digital square waves.

Key Technical Specifications

• Function: Quad 2-Input NAND Schmitt Trigger

• Technology: CMOS (HE4000B Family)

• Package Type: 14-Pin PDIP (Plastic Dual In-Line Package)

• Operating Voltage: 3V to 15V (Standard CMOS range)

• Hysteresis Voltage: Typically 0.6V at $V_{DD} = 5\text{V}$

• Input Impedance: Extremely high (typical of CMOS)

• Features: Unlimited input rise and fall times due to Schmitt trigger action.

Applications

• Signal Conditioning: Removing noise from mechanical switches (debouncing) or sensor outputs.

• Pulse Shapers: Converting sine waves or triangular waves into clean square waves.

• Astabile Multivibrators: Creating simple, low-part-count oscillators and clocks.

• Monostable Multivibrators: Generating precise time-delay pulses.

• Logic Gates: Can be used as standard NAND gates or tied together to function as NOT gates (inverters).

Why Choose the HEF4093BP?

• Noise Immunity: The built-in hysteresis makes it much more reliable than standard logic gates in electrically "noisy" environments.

• Simplicity: It allows for the creation of oscillators with just a single resistor and capacitor (RC circuit).

• Versatility: As a member of the 4000 series, it is a robust, industry-standard part with low power consumption and high voltage tolerance.

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