Overview
The SN74ACT245DWRE4 is an octal bus transceiver with 3-state outputs, designed and manufactured by Texas Instruments. This device is part of the 74ACT series and is optimized for asynchronous two-way communication between data buses. It features a control-function implementation that minimizes external timing requirements, making it suitable for a variety of applications where precise bus management is crucial.
Key Specifications
| Parameter | Min | 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 | -24 | mA |
| IOL Low-Level Output Current | 24 | 24 | mA |
| TA Operating Free-Air Temperature | -40 | 85 | °C |
| tpd Propagation Delay Time | 1 | 9 | ns |
| ICC Quiescent Current | 0.04 | 0.04 | mA |
| Package Type | SOIC | ||
| Package Size | 12.8mm x 10.3mm |
Key Features
- Operates from 4.5V to 5.5V supply voltage.
- Inputs accept voltages up to 5.5V.
- Maximum propagation delay time of 9ns at 5V.
- TTL-voltage compatible inputs.
- Low drive and slow edge rates to minimize output ringing.
- Output-enable (OE) input to disable the device and isolate the buses.
- High-impedance state during power up or power down when OE is tied to VCC through a pullup resistor.
Applications
- Professional Audio Systems
- Video and Signage Systems
- Appliances
- Factory Automation and Control Systems
- Bus interface applications where output ringing is a concern.
Q & A
- What is the operating voltage range of the SN74ACT245DWRE4?
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 is 9ns. - What type of inputs does the SN74ACT245DWRE4 have?
The inputs are TTL-voltage compatible. - How do you ensure the high-impedance state during power up or power down?
By tying the OE input to VCC through a pullup resistor. - What is the package type of the SN74ACT245DWRE4?
The package type is SOIC (Small Outline Integrated Circuit). - What are the dimensions of the SOIC package?
The dimensions are 12.8mm x 10.3mm. - What is the purpose of the output-enable (OE) input?
The OE input is used to disable the device and isolate the buses. - What are some common applications of the SN74ACT245DWRE4?
Common applications include professional audio systems, video and signage systems, appliances, and factory automation and control systems. - How does the device minimize output ringing?
The device has low drive and slow edge rates to minimize output ringing. - What is the operating temperature range of the SN74ACT245DWRE4?
The operating temperature range is from -40°C to 85°C.
