Overview
The 74HC244D is an octal buffer/line driver integrated circuit produced by Toshiba Semiconductor and Storage. It is part of the 74HC series, known for its high-speed CMOS technology. This device is designed to provide buffering and line-driving capabilities for digital signals, making it suitable for a variety of applications in digital electronics.
The 74HC244D can be used as either a single 8-bit buffer or two 4-bit buffers, each with 3-state outputs. The outputs can be actively driven to a high-impedance state when not enabled, controlled by two output enable pins (1OE and 2OE). This feature allows for flexible use in different circuit configurations.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Supply Voltage Range | Minimum to Maximum Supply Voltage | 2.0 - 6.0 | V |
| Operating Temperature | Minimum to Maximum Operating Temperature | -40 to 85 | °C |
| Propagation Delay Time (Typ.) | At VCC = 5V | 10 | ns |
| Package Type | Package Name and Dimensions | SOIC20 (7.5mm width) | - |
| Number of Pins | Total Number of Pins | 20 | - |
| Mounting Type | Method of Attachment | Surface Mount | - |
| RoHS Status | Compliance with RoHS Directive | RoHS Compliant | - |
| Power Dissipation | Maximum Power Dissipation | 500 | mW |
Key Features
- Wide Supply Voltage Range: Operates with a supply voltage from 2.0V to 6.0V, making it compatible with both 3.3V and 5V systems.
- Low Power Dissipation: Designed with CMOS technology, which ensures low power consumption.
- Good Noise Resistance: High resistance to noise, enhancing the reliability of the device in noisy environments.
- 3-State Outputs: Outputs can be set to a high-impedance state when not enabled, controlled by two output enable pins (1OE and 2OE).
- Latch-Up Performance: Surpasses 100 mA according to JESD 78 Class II Level B, ensuring robust performance against latch-up conditions.
Applications
The 74HC244D is versatile and can be used in various digital electronics applications, including:
- Buffering and Line Driving: Enhances the driving capability of digital signals, making it suitable for long-distance signal transmission.
- Digital Circuitry: Used in digital circuits where signal buffering and isolation are required.
- Communication Systems: Can be used in communication systems to improve signal integrity and reduce noise.
- Industrial Control Systems: Suitable for industrial control systems due to its robust performance and wide operating temperature range.
Q & A
- What is the function of the 74HC244D?
The 74HC244D is designed to provide buffering and line-driving capabilities for digital signals. It can take in eight input signals and produce corresponding output signals with enhanced driving capability.
- What is the voltage range supported by the 74HC244D?
The 74HC244D operates with a power supply voltage (VCC) ranging from 2.0V to 6.0V.
- What is the propagation delay time of the 74HC244D?
The propagation delay time (typical) at VCC = 5V is 10 ns.
- What type of package does the 74HC244D come in?
The 74HC244D comes in a 20-pin SOIC (Small Outline Integrated Circuit) package with a width of 7.5mm.
- Is the 74HC244D RoHS compliant?
Yes, the 74HC244D is RoHS compliant.
- What is the operating temperature range of the 74HC244D?
The operating temperature range is from -40°C to 85°C.
- How many output enables does the 74HC244D have?
The 74HC244D has two output enables (1OE and 2OE), each controlling four 3-state outputs.
- What technology is used in the 74HC244D?
The 74HC244D is fabricated with silicon gate CMOS technology.
- Can the 74HC244D be used as a single 8-bit buffer or two 4-bit buffers?
Yes, the 74HC244D can be used as either a single 8-bit buffer or two 4-bit buffers.
- What is the maximum power dissipation of the 74HC244D?
The maximum power dissipation is 500 mW.
