Overview
The CD74HC244M96E4 is a non-inverting three-state buffer integrated circuit produced by Texas Instruments. It belongs to the 74HC series, which is known for its high-speed CMOS logic. This device is particularly useful in applications where data needs to be buffered and controlled through output enables.
The CD74HC244 features two active-low output enables, allowing for precise control over the output states. It is available in various package types, including SOIC, PDIP, and CDIP, making it versatile for different design requirements.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| VCC (Supply Voltage) | V | 2 | 5 | 6 |
| Propagation Delay (Data to Outputs) | ns | 9 | 22 | 33 |
| Output Enable and Disable Time | ns | 30 | 38 | 45 |
| Output Transition Time | ns | 12 | 15 | 18 |
| Input Capacitance | pF | 10 | 10 | 10 |
| Three-state Output Capacitance | pF | 20 | 20 | 20 |
| Power Dissipation Capacitance | pF | 5 | 40 | |
| Package Type | SOIC | |||
| Body Size (SOIC) | mm | 12.80 x 7.50 |
Key Features
- Non-inverting Three-state Buffers: The CD74HC244 provides non-inverting buffering, making it suitable for applications where signal integrity needs to be maintained.
- Two Active-Low Output Enables: This feature allows for precise control over the output states, enabling or disabling the outputs as needed.
- High-Speed CMOS Logic: Part of the 74HC series, this device offers high-speed operation with low power consumption.
- Multiple Package Options: Available in SOIC, PDIP, and CDIP packages, providing flexibility in design and implementation.
- Wide Operating Voltage Range: Operates within a supply voltage range of 2V to 6V, making it compatible with various system designs.
Applications
- Data Buffers in Digital Systems: Ideal for buffering data in digital circuits to improve signal integrity and reduce noise.
- Output Control in Logic Circuits: Useful in applications where output states need to be controlled through active-low enables.
- High-Speed Logic Circuits: Suitable for high-speed logic applications due to its fast propagation delay and transition times.
- General Purpose Logic: Can be used in various general-purpose logic applications requiring non-inverting buffering and output control.
Q & A
- What is the primary function of the CD74HC244?
The CD74HC244 is a non-inverting three-state buffer, designed to buffer and control data outputs through active-low output enables.
- What are the different package options available for the CD74HC244?
The CD74HC244 is available in SOIC, PDIP, and CDIP packages.
- What is the operating voltage range for the CD74HC244?
The device operates within a supply voltage range of 2V to 6V.
- How many output enables does the CD74HC244 have?
The CD74HC244 has two active-low output enables.
- What is the typical propagation delay for the CD74HC244?
The typical propagation delay for the CD74HC244 is around 22 ns.
- What is the recommended bypass capacitor for the power supply?
A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise.
- Why is it important to connect unused input pins?
Unused input pins must be connected to a logic high or logic low voltage to prevent them from floating and causing undefined operational states.
- What is the input capacitance of the CD74HC244?
The input capacitance is typically 10 pF.
- What is the power dissipation capacitance for the CD74HC244?
The power dissipation capacitance is typically 40 pF.
- In what temperature range can the CD74HC244 operate?
The device can operate over a temperature range of –40°C to 85°C.
