Overview
The SN74ABT244APWG4 is an octal buffer/line driver with 3-state outputs, produced by Texas Instruments. This device is part of the ABT (Advanced BiCMOS Technology) family, designed to enhance the performance and density of memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The SN74ABT244APWG4 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 crucial for preventing bus contention and reducing power consumption during power-up or power-down sequences.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VCC | Operating Voltage | 4.5 | 5 | 5.5 | V |
| TA | Operating Temperature | -40 | - | 85 | °C |
| IOH | High-Level Output Current | -24 | - | - | mA |
| IOL | Low-Level Output Current | 48 | - | - | mA |
| tPLH | Propagation Delay Time, A to Y | 1 | 2.6 | 4.1 | ns |
| tPHL | Propagation Delay Time, A to Y | 1 | 2.9 | 4.3 | ns |
| tPZH | Output Enable Time to High Impedance | 1.1 | 3.1 | 4.6 | ns |
| tPZL | Output Enable Time to Low Impedance | 2.1 | 4.1 | 5.6 | ns |
| Packaging | - | - | - | TSSOP (PW) |
Key Features
- High-drive outputs with –24-mA IOH and 48-mA IOL, ensuring robust signal transmission.
- 3-state outputs with active-low output-enable (OE) inputs, allowing for high-impedance state during power-up or power-down.
- Extended temperature performance from –40°C to 85°C, suitable for a wide range of applications.
- Packaged in TSSOP (Thin Shrink Small Outline Package) for compact design and reduced board space.
- Low output ground bounce (VOLP < 1 V at VCC = 5 V, TA = 25°C) to minimize noise and improve signal integrity.
- Controlled baseline with one assembly/test site and one fabrication site for consistent quality.
Applications
- Memory address drivers and clock drivers in high-speed digital systems.
- Bus-oriented receivers and transmitters in data communication systems.
- Industrial control systems requiring robust and reliable signal transmission.
- Automotive and aerospace applications where extended temperature ranges are necessary.
- Embedded systems and microcontrollers where compact packaging and low power consumption are critical.
Q & A
- What is the primary function of the SN74ABT244APWG4?
The primary function is to act as an octal buffer/line driver with 3-state outputs, passing noninverted data from the A inputs to the Y outputs when the OE input is low.
- What are the operating temperature ranges for the SN74ABT244APWG4?
The device operates from –40°C to 85°C.
- What is the significance of the high-impedance state in this device?
The high-impedance state prevents bus contention and reduces power consumption during power-up or power-down sequences.
- What is the packaging type for the SN74ABT244APWG4?
The device is packaged in a TSSOP (Thin Shrink Small Outline Package).
- What are the high-level and low-level output currents for this device?
The high-level output current (IOH) is –24 mA, and the low-level output current (IOL) is 48 mA.
- How do you ensure the high-impedance state during power-up or power-down?
Tie the OE input to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
- What are some common applications for the SN74ABT244APWG4?
Common applications include memory address drivers, clock drivers, bus-oriented receivers and transmitters, industrial control systems, and automotive/aerospace systems.
- What is the propagation delay time for this device?
The propagation delay time (tPLH and tPHL) ranges from 1 ns to 4.6 ns.
- Is the SN74ABT244APWG4 RoHS compliant?
Yes, the device is RoHS compliant.
- What is the output enable time to high impedance for this device?
The output enable time to high impedance (tPZH) ranges from 1.1 ns to 4.6 ns.
