Overview
The SN74ACT244DWRG4 is an octal buffer and driver produced by Texas Instruments. This device is part of the SNx4ACT244 family, designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It operates within a voltage range of 4.5V to 5.5V and is organized as two 4-bit buffers and drivers with separate output-enable (OE) inputs. The device is particularly useful in applications requiring high-drive capabilities and low propagation delays.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5.5 | V | |
| VIH High-Level Input Voltage | 2 | V | ||
| VIL Low-Level Input Voltage | 0.8 | V | ||
| IOH High-Level Output Current | -24 | mA | ||
| IOL Low-Level Output Current | 24 | mA | ||
| tPLH Propagation Delay (A to Y) | 1.5 | 6.5 | 9 | ns |
| tPHL Propagation Delay (A to Y) | 1.5 | 7 | 9 | ns |
| TA Operating Free-Air Temperature | -40 | 85 | °C |
Key Features
- Operates within a voltage range of 4.5V to 5.5V
- Inputs are TTL-compatible, accepting voltages up to 5.5V
- Maximum propagation delay of 9.5ns at 5V
- High-drive capability with 24-mA current drive per channel
- Active low output enable (OE) inputs to set outputs to high impedance
- Available in various packages including SOIC, SSOP, TSSOP, VQFN, and more
Applications
- LED displays
- Servers and telecommunications equipment
- Switching networks
- Memory address drivers and clock drivers
- Bus-oriented receivers and transmitters
Q & A
- What is the operating voltage range of the SN74ACT244DWRG4?
The SN74ACT244DWRG4 operates within a voltage range of 4.5V to 5.5V.
- What is the maximum propagation delay of the SN74ACT244DWRG4 at 5V?
The maximum propagation delay is 9.5ns at 5V.
- What is the current drive capability of the SN74ACT244DWRG4 per channel?
The device can drive up to 24 mA per channel.
- How do the output-enable (OE) inputs function?
The active low output enable (OE) inputs set the outputs to high impedance when a logic high is applied.
- In what packages is the SN74ACT244DWRG4 available?
The device is available in various packages including SOIC, SSOP, TSSOP, VQFN, and more.
- What are some common applications of the SN74ACT244DWRG4?
Common applications include LED displays, servers and telecommunications equipment, switching networks, and as memory address drivers and clock drivers.
- What is the operating temperature range for the SN74ACT244DWRG4?
The operating temperature range is -40°C to 85°C.
- Are the inputs of the SN74ACT244DWRG4 TTL-compatible?
- How should unused inputs be handled for proper device operation?
Unused inputs must be held at VCC or GND for proper device operation.
- What is the recommended handling for the output enable (OE) during power-up or power-down?
The OE should be tied to VCC through a pullup resistor to ensure the outputs are in the high-impedance state during power-up or power-down.
