Overview
The SN74ACT244PWR, produced by Texas Instruments, is an octal buffer and driver with 3-state outputs. This device is designed to enhance the performance and density of various digital systems, particularly in applications such as 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The SN74ACT244 is organized as two 4-bit buffers and drivers, each with separate output-enable (OE) inputs. When the OE input is low, the device passes non-inverted 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 useful for controlling data flow in complex digital circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage Range (VCC) | 4.5V to 5.5V |
| Input Voltage Range | Up to 5.5V |
| Maximum Propagation Delay (tpd) at 5V | 9.5ns |
| Input Compatibility | TTL-compatible |
| Output Current Drive per Channel | 24mA (nominal) |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | TSSOP (20 pins) |
| Package Quantity | Carrier 2,000 (LARGE T&R) |
Key Features
- Operates over a 4.5V to 5.5V VCC range
- Inputs accept voltages up to 5.5V
- Maximum propagation delay of 9.5ns at 5V
- TTL-compatible inputs
- Separate output-enable (OE) inputs for each 4-bit buffer
- High-impedance state when OE is high
- High-drive buffer drivers with 24-mA current drive per channel
Applications
- LED displays
- Servers and telecommunications
- Switching networks
- 3-state memory address drivers
- Clock drivers
- Bus-oriented receivers and transmitters
Q & A
- What is the operating voltage range of the SN74ACT244?
The operating voltage range is 4.5V to 5.5V. - What is the maximum propagation delay at 5V?
The maximum propagation delay at 5V is 9.5ns. - Are the inputs TTL-compatible?
Yes, the inputs are TTL-compatible. - What is the function of the output-enable (OE) input?
The OE input controls the output state; when low, data is passed from A inputs to Y outputs, and when high, the outputs are in the high-impedance state. - What is the current drive per channel?
The current drive per channel is 24mA (nominal). - What are some common applications of the SN74ACT244?
Common applications include LED displays, servers and telecommunications, switching networks, 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. - What is the operating temperature range of the SN74ACT244?
The operating temperature range is -40°C to 85°C. - What package types are available for the SN74ACT244?
The SN74ACT244 is available in various packages including TSSOP, SSOP, SOIC, PDIP, SO, and VQFN. - How many pins does the TSSOP package of the SN74ACT244 have?
The TSSOP package has 20 pins. - What is the significance of the high-impedance state in the SN74ACT244?
The high-impedance state allows the outputs to be disconnected from the bus, which is useful in multi-device bus systems.
