Overview
The SN74LVC244ARWPR, produced by Texas Instruments, is an octal buffer or line driver with 3-state outputs. This device is part of the 74LVC series and is designed for asynchronous communication between data buses. It operates within a voltage range of 1.65 V to 3.6 V, making it versatile for various applications. The device is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs, allowing for precise control over data transmission.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage | -0.5 | 6.5 | V |
| Input Voltage (VI) | -0.5 | 6.5 | V |
| Output Voltage (VO) in High-Impedance State | -0.5 | 6.5 | V |
| Output Voltage (VO) in High or Low State | -0.5 | VCC + 0.5 | V |
| Ambient Temperature (TA) | -40 | 125 | °C |
| Propagation Delay Time (tpd) | 1.5 | 14.4 | ns |
| Input Clamp Current (IIK) | -50 | - | mA |
| Junction-to-Ambient Thermal Resistance (RθJA) | 50.3 | 198.7 | °C/W |
Key Features
- Operates from 1.65 V to 3.6 V, making it suitable for a wide range of applications.
- Inputs accept voltages up to 5.5 V, providing overvoltage tolerance.
- Specified from –40°C to +85°C and –40°C to +125°C, ensuring reliability across various temperatures.
- 1000-V Charged-Device Model (CDM) ESD protection.
- Organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs.
- Outputs are in the high-impedance state when OE is high, and data is passed from A inputs to Y outputs when OE is low.
- Low power consumption with ICC of 1 μA to 40 μA depending on the operating conditions.
Applications
- Servers and data centers for reliable data transmission.
- LED displays for driving display segments.
- Network switches and routers for high-speed data communication.
- Telecom infrastructure for signal amplification and buffering.
- Motor drivers and I/O expanders in industrial control systems.
Q & A
- What is the operating voltage range of the SN74LVC244ARWPR?
The SN74LVC244ARWPR operates from 1.65 V to 3.6 V.
- What is the temperature range for the SN74LVC244ARWPR?
The device is specified from –40°C to +85°C and –40°C to +125°C.
- How many bits does the SN74LVC244ARWPR buffer/line driver have?
The device is organized as two 4-bit buffers/line drivers, making it an 8-bit buffer/line driver.
- What is the purpose of the output-enable (OE) input?
The OE input controls the state of the outputs; when OE is low, data is passed from A inputs to Y outputs, and when OE is high, the outputs are in the high-impedance state.
- What kind of ESD protection does the SN74LVC244ARWPR have?
The device has 1000-V Charged-Device Model (CDM) ESD protection.
- What are some common applications of the SN74LVC244ARWPR?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How should unused inputs be handled to ensure proper device operation?
Unused inputs must be held at VCC or GND to ensure proper device operation.
- What is the recommended bypass capacitor for the power supply?
A 0.1 μF capacitor is recommended for devices with a single supply, and 0.01 μF or 0.022 μF capacitors for each power terminal if there are multiple VCC terminals.
- What is the propagation delay time of the SN74LVC244ARWPR?
The propagation delay time (tpd) ranges from 1.5 ns to 14.4 ns depending on the operating conditions.
- What is the thermal resistance of the SN74LVC244ARWPR in different packages?
The junction-to-ambient thermal resistance (RθJA) varies from 50.3 °C/W to 198.7 °C/W depending on the package type.
