Overview
The MC74ACT245DWR2G, produced by onsemi, is an octal bidirectional transceiver with 3-state inputs and outputs. This component is designed for bus-oriented applications and features non-inverting buffers with a bidirectional data path. The device is part of the 74ACT series, which is known for its TTL-compatible inputs and high-speed performance.
The MC74ACT245DWR2G is available in a SOIC-20 package and is Pb-free, making it compliant with current environmental standards. It operates over a wide temperature range and is suitable for various digital logic applications.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| DC Supply Voltage (VCC) | 4.5 to 5.5 | V | |
| DC Input Voltage (VIN) | −0.5 to VCC + 0.5 | V | |
| DC Output Voltage (VOUT) | −0.5 to VCC + 0.5 | V | |
| Output Current - High (IOH) | −24 mA | mA | |
| Output Current - Low (IOL) | 24 mA | mA | |
| Operating Ambient Temperature Range (TA) | −40 to 85 | °C | |
| Propagation Delay (tPLH, tPHL) | 1.5 to 9.0 ns | ns | CL = 50 pF |
| Output Enable Time (tPZH, tPZL) | 1.5 to 12.5 ns | ns | CL = 50 pF |
| Output Disable Time (tPHZ, tPLZ) | 1.0 to 13.0 ns | ns | CL = 50 pF |
| Input Capacitance (CIN) | 4.5 pF | pF | VCC = 5.0 V |
| Input/Output Capacitance (CI/O) | 15 pF | pF | VCC = 5.0 V |
Key Features
- Non-inverting buffers
- Bidirectional data path
- A and B outputs source/sink 24 mA
- TTL-compatible inputs for the 74ACT series
- Pb-free devices
- 3-state outputs controlled by the Output Enable (OE) input
- Transmit/Receive (T/R) input determines the direction of data flow
- High-speed performance with propagation delays as low as 1.5 ns
Applications
The MC74ACT245DWR2G is suitable for a variety of bus-oriented applications, including:
- Computer peripherals and interfaces
- Industrial control systems
- Telecommunication equipment
- Data transmission and reception systems
- Any application requiring high-speed, bidirectional data transfer
Q & A
- What is the primary function of the MC74ACT245DWR2G?
The MC74ACT245DWR2G is an octal bidirectional transceiver, allowing for bidirectional data transfer between two sets of inputs and outputs.
- What are the key differences between the 74AC and 74ACT series?
The 74ACT series has TTL-compatible inputs, whereas the 74AC series does not. This makes the 74ACT series more versatile in mixed-logic environments.
- How is the direction of data flow controlled in the MC74ACT245DWR2G?
The direction of data flow is controlled by the Transmit/Receive (T/R) input. A HIGH on the T/R input enables data transfer from A ports to B ports, while a LOW enables data transfer from B ports to A ports.
- What is the purpose of the Output Enable (OE) input?
The Output Enable (OE) input, when HIGH, disables both A and B ports by placing them in a High Z (high impedance) state.
- What are the maximum output current capabilities of the MC74ACT245DWR2G?
The outputs can source or sink up to 24 mA.
- What is the operating temperature range of the MC74ACT245DWR2G?
The device operates over a temperature range of −40°C to 85°C.
- What are the typical propagation delays for the MC74ACT245DWR2G?
The propagation delays (tPLH, tPHL) are typically between 1.5 ns and 9.0 ns, depending on the operating conditions.
- Is the MC74ACT245DWR2G Pb-free?
Yes, the MC74ACT245DWR2G is a Pb-free device, making it compliant with current environmental regulations.
- What are the package options available for the MC74ACT245DWR2G?
The device is available in SOIC-20 and TSSOP-20 packages.
- What is the maximum storage temperature for the MC74ACT245DWR2G?
The maximum storage temperature is −65°C to 150°C.
