Overview
The SN74ACT245DWR is an octal bus transceiver with 3-state outputs, designed and manufactured by Texas Instruments. This component is optimized for asynchronous two-way communication between data buses, making it highly versatile in various electronic systems. The device operates within a VCC range of 4.5V to 5.5V and is compatible with TTL voltage levels, ensuring seamless integration into a wide range of applications. The control-function implementation minimizes external timing requirements, enhancing the efficiency and reliability of the communication process.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5.5 | V | |
| VIH High-Level Input Voltage | 2 | 2 | V | |
| VIL Low-Level Input Voltage | 0.8 | 0.8 | V | |
| IOH High-Level Output Current | -24 | mA | ||
| IOL Low-Level Output Current | 24 | 24 | mA | |
| tPLH Propagation Delay Time (A to B) | 1 | 4 | 7.5 | ns |
| tPHL Propagation Delay Time (B to A) | 1 | 4 | 8 | ns |
| TA Operating Free-Air Temperature | -40 | 85 | °C | |
| RθJA Junction-to-Ambient Thermal Resistance | 98.6 | °C/W |
Key Features
- Operates within a VCC range of 4.5V to 5.5V, making it suitable for various voltage environments.
- Inputs accept voltages up to 5.5V and are TTL-voltage compatible.
- Maximum propagation delay time (tpd) of 8ns at 5V, ensuring high-speed data transfer.
- 3-state outputs to control data flow and minimize external timing requirements.
- Low drive and slow edge rates to minimize output ringing, overshoot, and undershoot.
- Available in multiple package types, including SOIC (DW), SSOP (DB), TSSOP (PW), and VQFN (RKS), among others.
Applications
- Professional Audio Systems: For reliable and high-speed data communication in audio equipment.
- Video and Signage: Used in video processing and display systems where data integrity is crucial.
- Appliances: Integrated into various household and industrial appliances for efficient data transfer.
- Factory Automation and Control: Utilized in industrial control systems for reliable communication between different modules.
Q & A
- What is the operating voltage range of the SN74ACT245DWR? The operating voltage range is from 4.5V to 5.5V.
- What is the maximum propagation delay time at 5V? The maximum propagation delay time at 5V is 8ns.
- What are the input voltage compatibility and range? The inputs accept voltages up to 5.5V and are TTL-voltage compatible.
- How does the output enable (OE) function work? When OE is low, the device passes noninverted data between the A and B buses. When OE is high, the device is in isolation mode.
- What are the key applications of the SN74ACT245DWR? It is used in professional audio, video and signage, appliances, and factory automation and control systems.
- What package types are available for the SN74ACT245DWR? It is available in SOIC (DW), SSOP (DB), TSSOP (PW), VQFN (RKS), and other package types.
- How does the direction-control (DIR) input work? The DIR input determines the direction of data flow between the A and B buses.
- What is the thermal resistance (RθJA) for the SOIC package? The thermal resistance (RθJA) for the SOIC package is 98.6°C/W.
- What is the recommended operating temperature range? The recommended operating temperature range is from -40°C to 85°C.
- How can output ringing be minimized in the SN74ACT245DWR? The low drive and slow edge rates of the device help minimize output ringing, overshoot, and undershoot.
