規格
| 屬性 | 價值 |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| Series | 74ACT |
| ProductStatus | Active |
| LogicType | Transceiver, Non-Inverting |
| NumberofElements | 1 |
| NumberofBitsperElement | 8 |
| OutputType | 3-State |
| Current-OutputHighLow | 24mA, 24mA |
| Voltage-Supply | 4.5V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 20-SOIC (0.295, 7.50mm Width) |
概述
Description
The SN74ACT245DWR is an octal bus transceiver from Texas Instruments, designed for asynchronous two-way communication between data buses. It features three-state outputs, allowing it to act as either a driver or receiver, and is capable of isolating the buses effectively. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports TTL-level logic inputs, making it compatible with a wide range of digital systems.
Key features include:
1. High-Speed Performance: The SN74ACT245DWR is part of the Advanced CMOS Logic (ACT) family, which provides improved speed characteristics compared to traditional TTL logic.
2. Three-State Outputs: This feature allows the outputs to be set to a high-impedance state, facilitating multiple connections on a bus.
3. Direction Control: A direction pin controls the data flow direction, making it versatile for various data transmission needs.
4. Latch-Up Performance: The device is designed to withstand transient overvoltage conditions, enhancing its reliability in harsh environments.
The SN74ACT245DWR is typically available in SOIC (Small Outline Integrated Circuit) packaging, suitable for surface-mount applications.
Key features include:
1. High-Speed Performance: The SN74ACT245DWR is part of the Advanced CMOS Logic (ACT) family, which provides improved speed characteristics compared to traditional TTL logic.
2. Three-State Outputs: This feature allows the outputs to be set to a high-impedance state, facilitating multiple connections on a bus.
3. Direction Control: A direction pin controls the data flow direction, making it versatile for various data transmission needs.
4. Latch-Up Performance: The device is designed to withstand transient overvoltage conditions, enhancing its reliability in harsh environments.
The SN74ACT245DWR is typically available in SOIC (Small Outline Integrated Circuit) packaging, suitable for surface-mount applications.
Equivalent
The SN74ACT245DWR is an octal bus transceiver with 3-state outputs. Equivalent products include:
1. 74HC245 - a similar 8-bit transceiver from NXP or other manufacturers.
2. 74AHCT245 - an advanced high-speed CMOS variant available from various vendors.
3. 74LS245 - a low-power Schottky version from multiple manufacturers.
4. CD74ACT245 - a similar transceiver from Texas Instruments or other suppliers.
Ensure compatibility with voltage, current, and timing specs before substituting.
1. 74HC245 - a similar 8-bit transceiver from NXP or other manufacturers.
2. 74AHCT245 - an advanced high-speed CMOS variant available from various vendors.
3. 74LS245 - a low-power Schottky version from multiple manufacturers.
4. CD74ACT245 - a similar transceiver from Texas Instruments or other suppliers.
Ensure compatibility with voltage, current, and timing specs before substituting.
Features
The SN74ACT245DWR is an octal bus transceiver designed for asynchronous two-way communication between data buses. Key features include:
1. Logic Family: It belongs to the ACT family, which utilizes advanced CMOS technology for high-speed operations.
2. Bidirectional Data Transfer: Allows for data communication in both directions via the bus transceiver mode.
3. Operating Voltage: Supports a wide voltage range from 4.5V to 5.5V.
4. High-Speed Operation: Features fast propagation delay for quick data transmission.
5. Low Power Consumption: Designed for efficient energy usage, reducing heat generation.
6. Tri-State Outputs: Facilitates connections to a bus system without conflicts, thanks to its high-impedance state.
7. Drive Capability: Offers strong output drive capability, suitable for driving heavy loads.
8. Pin Configuration: Available in a 20-pin SOIC package, making it suitable for space-constrained applications.
9. Latch-Up Performance: Meets or exceeds JEDEC standards for latch-up protection, ensuring reliability.
10. Temperature Range: Operates efficiently within a wide temperature range, suitable for various environmental conditions.
These features make the SN74ACT245DWR ideal for applications requiring robust data buffering and level translation.
1. Logic Family: It belongs to the ACT family, which utilizes advanced CMOS technology for high-speed operations.
2. Bidirectional Data Transfer: Allows for data communication in both directions via the bus transceiver mode.
3. Operating Voltage: Supports a wide voltage range from 4.5V to 5.5V.
4. High-Speed Operation: Features fast propagation delay for quick data transmission.
5. Low Power Consumption: Designed for efficient energy usage, reducing heat generation.
6. Tri-State Outputs: Facilitates connections to a bus system without conflicts, thanks to its high-impedance state.
7. Drive Capability: Offers strong output drive capability, suitable for driving heavy loads.
8. Pin Configuration: Available in a 20-pin SOIC package, making it suitable for space-constrained applications.
9. Latch-Up Performance: Meets or exceeds JEDEC standards for latch-up protection, ensuring reliability.
10. Temperature Range: Operates efficiently within a wide temperature range, suitable for various environmental conditions.
These features make the SN74ACT245DWR ideal for applications requiring robust data buffering and level translation.
Pinout
The SN74ACT245DWR is an octal bus transceiver with three-state outputs. It is designed for asynchronous two-way communication between data buses. This device features an 8-bit data path with bidirectional data transfer capabilities. It has a total of 20 pins.
Here are the key functions of the pins:
- Pins 2-9 (A1-A8): Data inputs/outputs on the A side.
- Pins 11-18 (B1-B8): Data inputs/outputs on the B side.
- Pin 1 (DIR): Direction control pin. It determines the direction of data flow. When high, data is transferred from A to B; when low, from B to A.
- Pin 19 (OE): Output enable pin. When low, the transceiver is active. When high, the outputs are in a high-impedance state.
- Pin 10 (GND): Ground.
- Pin 20 (VCC): Supply voltage.
This device is typically used in applications where buffering and isolation of data buses are needed. It supports high-speed data transfer and is compatible with TTL logic levels.
Here are the key functions of the pins:
- Pins 2-9 (A1-A8): Data inputs/outputs on the A side.
- Pins 11-18 (B1-B8): Data inputs/outputs on the B side.
- Pin 1 (DIR): Direction control pin. It determines the direction of data flow. When high, data is transferred from A to B; when low, from B to A.
- Pin 19 (OE): Output enable pin. When low, the transceiver is active. When high, the outputs are in a high-impedance state.
- Pin 10 (GND): Ground.
- Pin 20 (VCC): Supply voltage.
This device is typically used in applications where buffering and isolation of data buses are needed. It supports high-speed data transfer and is compatible with TTL logic levels.
Manufacturer
The SN74ACT245DWR is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide array of electronic components, including analog and embedded processing chips. Founded in 1930 and headquartered in Dallas, Texas, TI is one of the largest semiconductor companies in the world. The company is known for its innovation in the electronics industry and serves a broad range of markets, including industrial, automotive, personal electronics, communications equipment, and enterprise systems. TI focuses on providing high-performance solutions that enhance the efficiency and reliability of electronic devices.
Application
The SN74ACT245DWR is a bidirectional bus transceiver with 3-state outputs, often used in applications requiring data transfer between buses. Its primary application areas include microprocessor and microcontroller systems for interfacing and bus control, memory management, and address buffering. It's also used in data communication systems for bus arbitration and signal integrity enhancements. The device's ability to handle multiple voltage levels makes it ideal for mixed-voltage environments in embedded systems and digital circuit designs. The SN74ACT245DWR is particularly useful in systems that require high-speed data transfer and low power consumption.
Package
The SN74ACT245DWR is an octal bus transceiver with 3-state outputs. It comes in a SOIC (Small Outline Integrated Circuit) package type, specifically a 20-pin wide-body SOIC package. The "DWR" in its part number indicates this specific packaging and tape-and-reel options for automated assembly.