Overview
The 74HCT244D is a high-speed CMOS octal bus buffer/line driver produced by Toshiba Semiconductor and Storage. This device is part of the 74HCT series and is fabricated using silicon gate C2MOS technology. It offers both high-speed operation and low power dissipation, making it suitable for a variety of digital signal processing applications. The 74HCT244D features non-inverting 3-state outputs and is designed to be used in systems requiring buffering and line-driving capabilities.
Key Specifications
| Characteristic | Symbol | Rating/Value | Unit |
|---|---|---|---|
| Supply Voltage | VCC | 4.5 to 5.5 | V |
| Operating Temperature | Topr | -40 to 125 | °C |
| Propagation Delay Time (Typ.) | tpd | 13 ns at VCC = 5.5 V | ns |
| Low-Level Input Voltage | VIL | 0.8 V (max) | V |
| High-Level Input Voltage | VIH | 2.0 V (min) | V |
| Output Current (High/Low) | IOUT | ±6 mA | mA |
| Power Dissipation | PD | 500 mW | mW |
| Package Type | 20-SOIC |
Key Features
- Wide Operating Temperature Range: -40°C to 125°C
- High Speed Operation: Propagation delay time of 13 ns (typ.) at VCC = 5.5 V
- Low Power Dissipation: ICC = 4.0 µA (max) at Ta = 25°C
- Compatibility with TTL Outputs: VIL = 0.8 V (max), VIH = 2.0 V (min)
- Wide Interfacing Ability: Compatible with LSTTL, NMOS, and CMOS output voltage levels
- 3-State Outputs: Non-inverting outputs with two active-low output enables
- ESD Protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- Input Protection: Clamp diodes for static discharge and transient excess voltage protection
Applications
The 74HCT244D is designed for use in various digital signal processing applications, including:
- Memory Address Drivers: Suitable for driving memory address lines due to its 3-state output capability
- Buffering and Line Driving: Can be used to buffer and drive digital signals in a variety of systems
- General Digital Logic Circuits: Useful in any application requiring high-speed buffering and line driving with low power consumption
Q & A
- What is the function of the 74HCT244D?
The 74HCT244D is an 8-bit buffer/line driver with non-inverting 3-state outputs, designed to provide buffering and line-driving capabilities for digital signals
- What is the voltage range supported by the 74HCT244D?
The device operates with a supply voltage (VCC) ranging from 4.5V to 5.5V
- What is the propagation delay time of the 74HCT244D?
The propagation delay time is typically 13 ns at VCC = 5.5 V
- Does the 74HCT244D have ESD protection?
- What type of package does the 74HCT244D come in?
The device is packaged in a 20-SOIC (Small Outline Integrated Circuit) package
- What is the operating temperature range of the 74HCT244D?
The operating temperature range is -40°C to 125°C
- Is the 74HCT244D compatible with TTL outputs?
- What is the power dissipation of the 74HCT244D?
The power dissipation is 500 mW
- Does the 74HCT244D have input protection?
- Can the 74HCT244D be used as multiple buffers?
