Overview
The SN74LS245N3 is an octal bus transceiver manufactured by Texas Instruments, designed for asynchronous bidirectional communication between data buses. This device is part of the 74LS series, known for its reliability and efficiency in digital logic applications. The SN74LS245N3 is particularly suited for applications requiring data transmission in both directions, with minimal external timing requirements. Its target user groups include engineers and designers working on digital systems, industrial automation, and embedded systems. The product stands out for its ability to isolate buses effectively and its robust performance in noisy environments.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Output Current | 15mA, 24mA | mA | High and low-level output currents |
| Supply Voltage | 4.75V~5.25V | V | Operating voltage range |
| Operating Temperature | 0℃~+70℃ | ℃ | Standard operating range |
| Package | PDIP-20 | - | Plastic Dual In-line Package |
| Pin Count | 20 | - | Total number of pins |
| Logic Type | Transceiver, Non-Inverting | - | Directional data transmission |
| Output Type | Tri-State | - | High impedance state when disabled |
| Propagation Delay | 8 ns | ns | Typical port-to-port delay |
Key Features
- Supports bidirectional data flow between buses with minimal external timing requirements.
- Tri-state outputs allow effective bus isolation when the device is disabled.
- PNP inputs reduce DC loading on the bus, enhancing performance in noisy environments.
- Hysteresis on bus inputs improves noise margin, ensuring reliable operation.
- Typical propagation delay of 8 ns ensures fast data transmission.
Applications
The SN74LS245N3 is widely used in various fields, including industrial automation, where it facilitates data communication between different control units. In consumer electronics, it is employed in devices requiring bidirectional data transfer, such as printers and scanners. Additionally, it finds applications in automotive electronics for interfacing between different subsystems. Its ability to isolate buses and handle noisy environments makes it a reliable choice for embedded systems and digital logic circuits.
Q & A
1. What is the primary function of the SN74LS245N3?
The SN74LS245N3 is an octal bus transceiver designed for bidirectional data communication between data buses.
2. What is the operating voltage range of the SN74LS245N3?
The operating voltage range is 4.75V to 5.25V.
3. What is the typical propagation delay of the SN74LS245N3?
The typical propagation delay is 8 ns.
4. How does the SN74LS245N3 handle bus isolation?
The device uses tri-state outputs to effectively isolate the bus when disabled.
5. What is the package type of the SN74LS245N3?
The SN74LS245N3 comes in a PDIP-20 package.
6. What are the key features of the SN74LS245N3?
Key features include bidirectional data flow, tri-state outputs, PNP inputs for reduced DC loading, and improved noise margin.
7. In what applications is the SN74LS245N3 commonly used?
It is commonly used in industrial automation, consumer electronics, automotive electronics, and embedded systems.
8. What is the pin count of the SN74LS245N3?
The device has 20 pins.
9. How does the SN74LS245N3 improve noise margin?
Hysteresis on bus inputs improves noise margin, ensuring reliable operation in noisy environments.
10. What is the output current capability of the SN74LS245N3?
The output current capability is 15mA and 24mA for high and low levels, respectively.
