Overview
The SN74ABT244APWRG4 is a 20-pin TSSOP package version of the SN74ABT244A, a dual 4-bit buffer/line driver produced by Texas Instruments. This device is designed to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It is part of a family of devices that offer various combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs.
The SN74ABT244A is characterized for operation from −40°C to 85°C, making it suitable for a wide range of applications. Although the SN74ABT244A itself is not obsolete, users should note that some package options may be discontinued or have specific status updates.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage (VCC) | V | 4.5 | 5.5 | |
| High-Level Input Voltage (VIH) | V | 2 | 2 | |
| Low-Level Input Voltage (VIL) | V | 0.8 | 0.8 | |
| High-Level Output Current (IOH) | mA | -24 | -32 | |
| Low-Level Output Current (IOL) | mA | 48 | 64 | |
| Operating Free-Air Temperature (TA) | °C | -40 | 85 | |
| Input Transition Rise or Fall Rate | ns/V | 5 | 5 | |
| Propagation Delay Time (tPLH, tPHL) | ns | 1 | 2.6-4.1 | 4.6 |
| Output Enable Time (tPZH, tPZL) | ns | 1.1 | 3.1-4.1 | 5.6 |
Key Features
- Dual 4-bit buffers/line drivers with separate output-enable (OE) inputs.
- 3-state outputs for bus-oriented applications.
- Symmetrical active-low OE inputs.
- Complementary OE and OE inputs.
- High-impedance state during power-up or power-down when OE is tied to VCC through a pull-up resistor.
- Operating temperature range from −40°C to 85°C.
- Available in TSSOP (20-pin) package.
- Pb-Free (RoHS & no Sb/Br) compliant.
Applications
- Memory address drivers.
- Clock drivers.
- Bus-oriented receivers and transmitters.
- General-purpose logic applications requiring 3-state outputs.
- Systems requiring high-speed data transfer and low power consumption.
Q & A
- What is the operating temperature range of the SN74ABT244A?
The operating temperature range is from −40°C to 85°C.
- What is the supply voltage range for the SN74ABT244A?
The supply voltage range is from 4.5 V to 5.5 V.
- What is the high-level output current (IOH) of the SN74ABT244A?
The high-level output current (IOH) is -24 mA to -32 mA.
- How do I ensure the high-impedance state during power-up or power-down?
Tie the OE input to VCC through a pull-up resistor.
- What are the typical propagation delay times for the SN74ABT244A?
The typical propagation delay times (tPLH, tPHL) are 2.6 ns to 4.1 ns.
- Is the SN74ABT244APWRG4 Pb-Free and RoHS compliant?
- What package options are available for the SN74ABT244A?
Available in TSSOP (20-pin), SSOP, SOIC, PDIP, and SO packages.
- What is the input transition rise or fall rate for the SN74ABT244A?
The input transition rise or fall rate is 5 ns/V.
- Can unused inputs be left floating?
No, unused inputs must be held high or low to prevent them from floating.
- What is the maximum current into any output in the low state for the SN74ABT244A?
The maximum current into any output in the low state is 128 mA.
