Overview
The SN74ABT244APWRE4 is an octal buffer and line driver produced by Texas Instruments. This device is designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It is part of the ABT family, which offers improved speed and drive capability compared to previous generations.
The SN74ABT244APWRE4 is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When the OE input is low, the device passes noninverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state, which is essential for bus applications.
This component is characterized for operation over a temperature range of −40°C to 85°C, making it suitable for a variety of industrial and commercial applications.
Key Specifications
| Parameter | Unit | Min | Max |
|---|---|---|---|
| VCC (Supply Voltage) | V | 4.5 | 5.5 |
| VIH (High-level Input Voltage) | V | 2 | 2 |
| VIL (Low-level Input Voltage) | V | 0.8 | 0.8 |
| IOH (High-level Output Current) | mA | -24 | -32 |
| IOL (Low-level Output Current) | mA | 48 | 64 |
| TA (Operating Free-air Temperature) | °C | -40 | 85 |
| tPLH (Propagation Delay Time, A to Y) | ns | 1 | 4.6 |
| tPHL (Propagation Delay Time, A to Y) | ns | 1 | 4.6 |
| tPZH (Output Enable Time to High Impedance) | ns | 1.1 | 5.1 |
| tPZL (Output Enable Time to Low Impedance) | ns | 2.1 | 6.1 |
Key Features
- Octal buffers/line drivers with separate output-enable (OE) inputs.
- 3-state outputs for bus applications.
- High-impedance state during power up or power down when OE is tied to VCC through a pull-up resistor.
- Noninverting outputs.
- Symmetrical active-low output-enable (OE) inputs.
- Complementary OE and OE inputs.
- Operating temperature range: −40°C to 85°C.
- Pb-Free (RoHS) and RoHS Exempt options available.
Applications
- 3-state memory address drivers.
- Clock drivers.
- Bus-oriented receivers and transmitters.
- Industrial and commercial electronic systems requiring high-speed data transmission.
- Embedded systems and microcontrollers.
- Computer peripherals and networking equipment.
Q & A
- What is the primary function of the SN74ABT244APWRE4?
The primary function is to act as an octal buffer and line driver, enhancing the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
- What is the operating temperature range of the SN74ABT244APWRE4?
The operating temperature range is from −40°C to 85°C.
- How do the output-enable (OE) inputs function?
When the OE input is low, the device passes noninverted data from the A inputs to the Y outputs. When the OE input is high, the outputs are in the high-impedance state.
- What is the significance of the high-impedance state during power up or power down?
The high-impedance state during power up or power down is ensured by tying the OE input to VCC through a pull-up resistor, preventing unintended output states.
- What are the typical propagation delay times for this device?
The typical propagation delay times (tPLH and tPHL) are around 2.6 to 4.6 ns.
- Is the SN74ABT244APWRE4 Pb-Free and RoHS compliant?
- What are the recommended operating conditions for the supply voltage (VCC)?
The recommended supply voltage (VCC) is between 4.5V and 5.5V.
- What is the maximum low-level output current (IOL)?
The maximum low-level output current (IOL) is 64 mA.
- What are the typical applications of the SN74ABT244APWRE4?
Typical applications include 3-state memory address drivers, clock drivers, bus-oriented receivers and transmitters, and various industrial and commercial electronic systems.
- Is the SN74ABT244APWRE4 still in production?
No, the SN74ABT244APWRE4 is discontinued by Texas Instruments.
