Overview
The SN74HCT244NSR is an octal buffer and line driver integrated circuit produced by Texas Instruments. This device is part of the 74HCT series, which is designed to be compatible with TTL (Transistor-Transistor Logic) inputs while operating within the voltage range of CMOS (Complementary Metal-Oxide-Semiconductor) logic. It features eight non-inverting buffers with 3-state outputs, making it suitable for various applications such as memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5 | 5.5 | V |
| High-Level Input Voltage (VIH) | 2 | - | - | V |
| Low-Level Input Voltage (VIL) | 0.8 | - | - | V |
| Input Voltage (VI) | 0 | - | VCC | V |
| Output Voltage (VO) | 0 | - | VCC | V |
| Input Transition Rise/Fall Time (∆t/∆v) | 500 | - | - | ns |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Package Type | - | - | SOP (NS) | - |
| Number of Pins | - | - | 20 | - |
Key Features
- Operating voltage range of 4.5V to 5.5V
- High-current outputs drive up to 15 LSTTL loads
- Low power consumption: 80µA maximum ICC
- Typical propagation delay time (tpd) = 13ns
- ±6mA output drive at 5V
- Low input current of 1µA maximum
- Inputs are TTL-voltage compatible
- 3-state outputs drive bus lines and buffer memory address registers
Applications
The SN74HCT244NSR is designed for various applications including:
- Memory address drivers
- Clock drivers
- Bus-oriented receivers and transmitters
- General-purpose buffering and line driving in digital systems
Q & A
- What is the operating voltage range of the SN74HCT244NSR?
The operating voltage range is from 4.5V to 5.5V.
- What type of inputs does the SN74HCT244NSR have?
The inputs are TTL-voltage compatible.
- What is the maximum output drive current at 5V?
The maximum output drive current at 5V is ±6mA.
- What is the typical propagation delay time (tpd) of the SN74HCT244NSR?
The typical propagation delay time (tpd) is 13ns.
- What is the package type and number of pins for the SN74HCT244NSR?
The package type is SOP (NS) with 20 pins).
- What is the operating temperature range of the SN74HCT244NSR?
The operating temperature range is from -40°C to 85°C).
- What are the main applications of the SN74HCT244NSR?
The main applications include memory address drivers, clock drivers, and bus-oriented receivers and transmitters).
- Is the SN74HCT244NSR RoHS compliant?
Yes, the SN74HCT244NSR is RoHS compliant).
- How many buffers or drivers does the SN74HCT244NSR have?
The SN74HCT244NSR has eight non-inverting buffers or drivers, organized as two 4-bit buffers or drivers).
- What is the state of the outputs when the output-enable (OE) input is high?
When the output-enable (OE) input is high, the outputs are in the high-impedance state).
