規格
| 屬性 | 價值 |
| Package / Case | Tape & Reel (TR),Cut Tape (CT),Bulk |
| Series | 74ACT |
| Part Status | Active |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High Low | 24mA, 24mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
概述
Description
The SN74ACT245DBR is an integrated circuit from Texas Instruments, functioning as an octal bus transceiver. It is designed for asynchronous two-way data communication between data buses. This IC operates using advanced CMOS technology, providing high-speed performance similar to bipolar devices while maintaining low power consumption characteristics.
Key features of the SN74ACT245DBR include:
1. Bi-Directional Data Flow: Facilitates data transfer in both directions, controlled by the direction (DIR) input.
2. Output Enable (OE): Allows for control over the transceiver operation, enabling or disabling data flow.
3. High-Speed Operation: Delivers fast data transfer rates suitable for a variety of applications.
4. 3-State Outputs: Provide high impedance states to prevent bus contention, ideal for bus-oriented applications.
Operating at a supply voltage range of 4.5V to 5.5V, the SN74ACT245DBR is well-suited for interfacing between TTL and CMOS components. Packaged typically in a small outline integrated circuit (SOIC) format, it is widely used in digital signal processing, memory interfacing, and other communication tasks in electronic systems.
Key features of the SN74ACT245DBR include:
1. Bi-Directional Data Flow: Facilitates data transfer in both directions, controlled by the direction (DIR) input.
2. Output Enable (OE): Allows for control over the transceiver operation, enabling or disabling data flow.
3. High-Speed Operation: Delivers fast data transfer rates suitable for a variety of applications.
4. 3-State Outputs: Provide high impedance states to prevent bus contention, ideal for bus-oriented applications.
Operating at a supply voltage range of 4.5V to 5.5V, the SN74ACT245DBR is well-suited for interfacing between TTL and CMOS components. Packaged typically in a small outline integrated circuit (SOIC) format, it is widely used in digital signal processing, memory interfacing, and other communication tasks in electronic systems.
Equivalent
The SN74ACT245DBR is an octal bus transceiver with 3-state outputs. Equivalent products include:
1. 74ACT245 from manufacturers like ON Semiconductor or Fairchild.
2. CD74ACT245 from Texas Instruments.
3. MC74ACT245 from NXP Semiconductors.
These components have similar functionality and electrical characteristics, but always check datasheets for compatibility in terms of voltage, current, and packaging.
1. 74ACT245 from manufacturers like ON Semiconductor or Fairchild.
2. CD74ACT245 from Texas Instruments.
3. MC74ACT245 from NXP Semiconductors.
These components have similar functionality and electrical characteristics, but always check datasheets for compatibility in terms of voltage, current, and packaging.
Features
The SN74ACT245DBR is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. Key features include:
1. High-Speed Performance: It operates at high speeds, ideal for high-speed data transmission applications.
2. 3-State Outputs: Allows for bus line driving and isolation by placing outputs in a high impedance state.
3. 8-Bit Transceiver: Facilitates bidirectional data flow between buses.
4. Wide Operating Voltage: Designed to function within a wide voltage range, typically 4.5V to 5.5V.
5. Low Power Consumption: Benefits from CMOS technology, ensuring efficient power usage.
6. High Output Drive: Can drive a significant load, making it suitable for driving long data buses.
7. Latch-Up Performance: Offers good resistance to latch-up, enhancing reliability.
8. TTL-Compatible Inputs: Ensures compatibility with TTL logic levels, easing integration with various systems.
9. Compact Package: Available in a small package, the SSOP (DB) for space-constrained applications.
This IC is suitable for memory interfacing, bus control, and other digital applications requiring efficient data exchange.
1. High-Speed Performance: It operates at high speeds, ideal for high-speed data transmission applications.
2. 3-State Outputs: Allows for bus line driving and isolation by placing outputs in a high impedance state.
3. 8-Bit Transceiver: Facilitates bidirectional data flow between buses.
4. Wide Operating Voltage: Designed to function within a wide voltage range, typically 4.5V to 5.5V.
5. Low Power Consumption: Benefits from CMOS technology, ensuring efficient power usage.
6. High Output Drive: Can drive a significant load, making it suitable for driving long data buses.
7. Latch-Up Performance: Offers good resistance to latch-up, enhancing reliability.
8. TTL-Compatible Inputs: Ensures compatibility with TTL logic levels, easing integration with various systems.
9. Compact Package: Available in a small package, the SSOP (DB) for space-constrained applications.
This IC is suitable for memory interfacing, bus control, and other digital applications requiring efficient data exchange.
Pinout
The SN74ACT245DBR is an octal bus transceiver with 3-state outputs, commonly used for asynchronous two-way communication between data buses. It has a pin count of 20. The device functions as a bidirectional buffer, allowing data transmission from the A bus to the B bus or vice versa, depending on the direction-control (DIR) input. The output-enable (OE) input controls the state of the outputs; when OE is low, the transceivers are enabled, allowing data transfer. When OE is high, the outputs are in a high-impedance state, effectively isolating the buses.
Here's a brief pin configuration:
- Pins 1 and 19: OE (Output Enable)
- Pin 15: DIR (Direction Control)
- Pins 2-9: Data inputs/outputs for bus A (A1-A8)
- Pins 18-11: Data inputs/outputs for bus B (B1-B8)
- Pin 10: GND (Ground)
- Pin 20: VCC (Power supply)
The SN74ACT245DBR is suitable for a wide range of applications requiring bidirectional data flow control with minimal delay.
Here's a brief pin configuration:
- Pins 1 and 19: OE (Output Enable)
- Pin 15: DIR (Direction Control)
- Pins 2-9: Data inputs/outputs for bus A (A1-A8)
- Pins 18-11: Data inputs/outputs for bus B (B1-B8)
- Pin 10: GND (Ground)
- Pin 20: VCC (Power supply)
The SN74ACT245DBR is suitable for a wide range of applications requiring bidirectional data flow control with minimal delay.
Manufacturer
The SN74ACT245DBR is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits. It is one of the largest semiconductor companies globally and is well-known for its development of analog chips and embedded processors, which are widely used in electronics across multiple industries. TI's operations include designing, manufacturing, testing, and selling semiconductor technologies to electronics designers and manufacturers worldwide. The company has a strong focus on innovation and development within the technology sector, providing solutions that enable advancements in industrial, automotive, personal electronics, communications, and enterprise systems.
Application
The SN74ACT245DBR is an octal bus transceiver designed for asynchronous two-way communication between data buses. It is commonly used in applications such as microprocessor and memory systems for data buffering and bus interfacing. The device supports TTL-compatible inputs and outputs, making it suitable for interfacing with TTL and CMOS logic levels. Additionally, it finds application in address data multiplexing, signal isolation, and bi-directional communication in systems requiring data flow control across different parts of a circuit, supporting high-speed data transfer due to its fast switching characteristics. Its low power consumption also makes it ideal for portable and battery-operated devices.
Package
The SN74ACT245DBR is a part from Texas Instruments and comes in a SSOP (Shrink Small Outline Package) with 20 pins. The package is designed for surface-mount applications.