Overview
The CD74HC04E is a high-speed CMOS logic hex inverter produced by Texas Instruments. This device contains six independent inverters, each performing the Boolean function Y = A in positive logic. It is designed to operate over a wide range of temperatures and voltages, making it versatile for various digital logic applications.
The CD74HC04E is available in several package types, including PDIP (Plastic Dual In-Line Package), SOIC (Small Outline Integrated Circuit), and CDIP (Ceramic Dual In-Line Package). This allows for flexibility in design and implementation across different projects.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage (VCC = 6V) | 4.2 | V | ||
| VIL Low-Level Input Voltage (VCC = 6V) | 1.8 | V | ||
| TA Operating Free-Air Temperature | -55 | 125 | °C | |
| tpd Propagation Delay (CL = 50 pF, VCC = 6V) | 14 | 18 | 22 | ns |
| IO Continuous Output Current | ±25 | mA | ||
| ICC Supply Current (VCC = 6V, IO = 0) | 20 | 40 | µA |
Key Features
- Buffered Inputs: The device has buffered inputs which help in maintaining signal integrity.
- Wide Operating Voltage Range: Operates from 2 V to 6 V, making it suitable for a variety of power supply conditions.
- Wide Operating Temperature Range: Functions from –55°C to +125°C, ensuring reliability in extreme environments.
- High Fanout Capability: Supports fanout up to 10 LSTTL loads, allowing it to drive multiple logic gates.
- Low Power Consumption: Significant power reduction compared to LSTTL logic ICs, contributing to energy efficiency.
- Balanced CMOS Push-Pull Outputs: Outputs can sink and source similar currents, ensuring balanced drive capability.
- Standard CMOS Inputs: High impedance inputs with fast edge rates to avoid excessive current consumption and oscillations.
- Clamp Diode Structure: Inputs and outputs have positive and negative clamping diodes to protect against voltage spikes.
Applications
- Synchronizing Inverted Clock Inputs: Useful in timing circuits where clock signals need to be inverted and synchronized.
- Inverting Digital Signals: Can be used to invert digital signals in various digital logic circuits.
- General Logic Circuits: Suitable for use in any digital logic circuit requiring inversion of signals.
- Embedded Systems: Can be integrated into embedded systems requiring low power and high reliability.
Q & A
- What is the CD74HC04E?
The CD74HC04E is a high-speed CMOS logic hex inverter IC produced by Texas Instruments.
- What is the operating voltage range of the CD74HC04E?
The device operates from 2 V to 6 V.
- What is the operating temperature range of the CD74HC04E?
The device functions from –55°C to +125°C.
- How many inverters does the CD74HC04E contain?
The device contains six independent inverters.
- What is the maximum propagation delay of the CD74HC04E at VCC = 6V?
The maximum propagation delay is 22 ns for CL = 50 pF.
- What is the maximum continuous output current of the CD74HC04E?
The maximum continuous output current is ±25 mA.
- What type of inputs does the CD74HC04E have?
The device has standard CMOS inputs.
- What is the purpose of the clamp diodes in the CD74HC04E?
The clamp diodes protect the inputs and outputs against voltage spikes.
- Can the CD74HC04E drive large capacitive loads?
Yes, but it is recommended to add a series resistor to limit output current and prevent damage.
- What are some common applications of the CD74HC04E?
Common applications include synchronizing inverted clock inputs, inverting digital signals, and use in general logic circuits and embedded systems.
