CD74HC14E

Product Overview

• Category: Integrated Circuit
• Use: Inverter Schmitt Trigger
• Characteristics: High-Speed CMOS Logic, Hex Schmitt-Trigger Inverters
• Package: 14-Pin DIP (Dual Inline Package)
• Essence: The CD74HC14E is a member of the HC family of high-speed CMOS logic integrated circuits. It consists of six Schmitt-trigger inverters, which are widely used in digital electronics for signal conditioning and level shifting.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on manufacturer specifications.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Input Current: ±1µA
• Maximum Output Current: ±5.2mA
• Propagation Delay Time: 9ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HC14E has a 14-pin Dual Inline Package (DIP) configuration. The pinout is as follows:

__ __ VCC | 1 14 | VCC /A1 | 2 13 | A2 /Y1 | 3 12 | Y2 A1 | 4 11 | A3 Y1 | 5 10 | Y3 A2 | 6 9 | A4 Y2 | 7 8 | Y4 ‾‾ ‾‾

Functional Features

• High-Speed Operation: The CD74HC14E operates at high speeds, making it suitable for applications that require fast signal processing.
• Schmitt Trigger Inputs: The Schmitt-trigger inputs allow the device to have hysteresis, ensuring noise immunity and stable output transitions even in the presence of input noise or slow-changing signals.
• Wide Supply Voltage Range: The IC can operate within a wide supply voltage range of 2V to 6V, providing flexibility in various electronic systems.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient signal processing.
• Schmitt-trigger inputs provide noise immunity and stable output transitions.
• Wide supply voltage range allows compatibility with different power sources.

Disadvantages

• Limited number of inverters (six) in a single package.
• Not suitable for applications requiring higher voltage levels.

Working Principles

The CD74HC14E is based on CMOS technology, which utilizes complementary pairs of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors). The Schmitt-trigger inputs ensure that the output changes state only when the input voltage crosses specific threshold levels. This hysteresis property prevents false triggering due to noise or slow-changing signals.

Detailed Application Field Plans

The CD74HC14E finds applications in various digital electronics systems, including:

1. Signal Conditioning: The Schmitt-trigger functionality helps in conditioning input signals by converting them into clean square waveforms, suitable for further processing.
2. Level Shifting: The IC can be used to shift logic levels between different sections of a circuit, enabling compatibility between devices operating at different voltage levels.
3. Oscillator Circuits: The Schmitt-trigger inverters can be configured as relaxation oscillators or timing circuits, generating square wave signals of specific frequencies.
4. Pulse Shaping: The CD74HC14E can shape input pulses, removing noise and ensuring well-defined output pulses.

Detailed and Complete Alternative Models

• SN74HC14: Similar to CD74HC14E, but with a different manufacturer (Texas Instruments).
• MC74HC14: Another alternative from a different manufacturer (Motorola).

These alternative models offer similar functionality and characteristics, providing options for users based on availability and specific requirements.

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