Overview
The SN74LS244NSR is an octal buffer and line driver produced by Texas Instruments. This component is designed to enhance the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It features two 4-bit buffers and drivers with separate output-enable (G) inputs, allowing for flexible control over the output states. The device can operate with inputs driven from either 3.3-V or 5-V devices, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.75 to 5.25 | V |
| Propagation Delay Time (tPLH, tPHL) | 12 to 18 | ns |
| Output Enable Time (tPZL, tPZH) | 15 to 25 | ns |
| Output Disable Time (tPLZ, tPHZ) | 10 to 20 | ns |
| Input Voltage (VIN) | 0 to 5.5 | V |
| Operating Temperature (TA) | 0 to 70 | °C |
| Package Type | SO (Small Outline) |
Key Features
- 3-State Outputs: Drive bus lines or buffer memory address registers.
- PNP Inputs: Reduce DC loading and improve noise margins.
- Hysteresis at Inputs: Enhances noise immunity.
- High Fan-Out: Supports driving multiple loads.
- Improved Fan-In: Reduces input loading.
- 400-mV Noise Margin: Ensures reliable operation in noisy environments.
- Push-Pull Output: Provides strong drive capability.
Applications
- Servers: For reliable data transmission and buffering.
- LED Displays: To drive display segments efficiently.
- Network Switches: For high-speed data buffering and transmission.
- Telecom Infrastructure: To enhance signal integrity and reliability.
- Motor Drivers: For precise control and buffering of motor control signals.
- I/O Expanders: To extend the input/output capabilities of microcontrollers and other devices.
Q & A
- What is the primary function of the SN74LS244NSR? The SN74LS244NSR is an octal buffer and line driver designed to improve the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
- What is the operating voltage range of the SN74LS244NSR? The operating voltage range is 4.75 to 5.25 volts.
- What is the propagation delay time of the SN74LS244NSR? The propagation delay time (tPLH, tPHL) is between 12 to 18 nanoseconds.
- Can the SN74LS244NSR drive terminated lines? Yes, it can drive terminated lines down to 133 Ω.
- What type of inputs does the SN74LS244NSR have? The device has PNP inputs with hysteresis to reduce DC loading and improve noise margins.
- What are the typical applications of the SN74LS244NSR? Typical applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- What is the package type of the SN74LS244NSR? The package type is Small Outline (SO).
- What is the operating temperature range of the SN74LS244NSR? The operating temperature range is 0 to 70°C.
- Can the SN74LS244NSR be used with both 3.3-V and 5-V devices? Yes, the device can be used with inputs driven from either 3.3-V or 5-V devices.
- What is the noise margin of the SN74LS244NSR? The noise margin is 400 mV.
