Overview
The SN74AC245DW, produced by Texas Instruments, is an octal bus transceiver designed for asynchronous two-way communication between data buses. This device is part of the 74AC series and is available in a 20-pin SOIC (DW) package. It is optimized for use in a wide range of applications where data needs to be transmitted between two buses efficiently.
The control-function implementation of the SN74AC245DW minimizes external timing requirements, allowing for flexible and reliable data transmission. The device features a direction-control (DIR) input that determines the direction of data flow between the A and B buses, and an output-enable (OE) input that can disable the device to isolate the buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 20-SOIC (DW) | - |
| Pins | 20 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Voltage - Supply | 2 to 6 | V |
| Input Voltage | Up to 6 | V |
| Output Type | Push-Pull | - |
| Current - Output High, Low | 24mA, 24mA | mA |
| Max tpd at 5V | 7ns | ns |
| Mounting Type | Surface Mount | - |
Key Features
- VCC operation from 2V to 6V, allowing for versatility in different voltage environments.
- Inputs can accept voltages up to 6V, enhancing compatibility with various signal levels.
- Maximum propagation delay (tpd) of 7ns at 5V, ensuring high-speed data transmission.
- Direction-control (DIR) input to control the direction of data flow between the A and B buses.
- Output-enable (OE) input to disable the device and isolate the buses when necessary.
- Push-Pull output type for reliable signal transmission.
- High current drive capability with output currents up to 24mA.
Applications
- Professional Audio Systems: For reliable and high-speed data transmission in audio equipment.
- Video and Signage: Suitable for use in video processing and display systems where data integrity is crucial.
- Appliances: Used in various consumer and industrial appliances requiring robust data communication.
- Factory Automation and Control: Ideal for industrial control systems that demand reliable and fast data exchange.
Q & A
- What is the primary function of the SN74AC245DW?
The primary function of the SN74AC245DW is to facilitate asynchronous two-way communication between data buses.
- What is the operating temperature range of the SN74AC245DW?
The operating temperature range is from -40°C to 85°C.
- What is the maximum propagation delay (tpd) at 5V for the SN74AC245DW?
The maximum propagation delay (tpd) at 5V is 7ns.
- How does the direction-control (DIR) input work?
The direction-control (DIR) input determines the direction of data flow between the A and B buses.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input can be used to disable the device and isolate the buses when necessary.
- What is the package type and pin count of the SN74AC245DW?
The package type is 20-SOIC (DW) with 20 pins.
- What are the typical applications of the SN74AC245DW?
Typical applications include professional audio systems, video and signage, appliances, and factory automation and control.
- What is the voltage range for VCC operation?
The VCC operation range is from 2V to 6V.
- Can the inputs accept voltages higher than VCC?
Yes, the inputs can accept voltages up to 6V.
- What is the current drive capability of the SN74AC245DW?
The output currents can be up to 24mA for both high and low levels.
