Overview
The SN74LS642NSR is a high-performance octal bus transceiver and register produced by Texas Instruments. This component belongs to the LS series of logic devices, which are widely recognized for their reliability and efficiency in digital logic applications. The SN74LS642NSR is designed to facilitate bidirectional data transfer between two buses, making it an essential component in systems requiring robust data communication. Its market positioning targets applications in industrial automation, telecommunications, and embedded systems, where reliable data transfer is critical. The product stands out for its low power consumption, high-speed operation, and compatibility with TTL logic levels.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Logic Family | LS | - | Low-power Schottky |
| Number of Bits | 8 | - | Octal |
| Supply Voltage | 4.75 to 5.25 | V | Standard TTL levels |
| Operating Temperature | 0 to 70 | °C | Commercial range |
| Propagation Delay | 15 | ns | Max at 5V |
| Output Current | 24 | mA | High-level output |
| Package Type | SOIC | - | 20-pin |
| Mounting Type | Surface Mount | - | Suitable for PCB assembly |
Key Features
- Bidirectional Data Flow: Enables seamless data transfer between two buses in both directions.
- Low Power Consumption: Optimized for energy efficiency, making it suitable for battery-powered devices.
- High-Speed Operation: Provides fast data transfer with a maximum propagation delay of 15 ns.
- TTL Compatibility: Ensures easy integration with other TTL logic devices.
- Robust Design: Built to withstand industrial environments with a wide operating temperature range.
Applications
The SN74LS642NSR is widely used in various industries due to its versatility and reliability. In industrial automation, it facilitates data communication between controllers and peripheral devices. In telecommunications, it ensures efficient data transfer in networking equipment. Additionally, it is employed in embedded systems for interfacing microcontrollers with external devices. Its compatibility with TTL logic levels makes it a preferred choice for legacy systems and modern designs alike.
Q & A
1. What is the primary function of the SN74LS642NSR?
The SN74LS642NSR is an octal bus transceiver and register designed for bidirectional data transfer between two buses.
2. What is the operating voltage range for this device?
The device operates within a supply voltage range of 4.75V to 5.25V.
3. Is the SN74LS642NSR compatible with TTL logic levels?
Yes, it is fully compatible with TTL logic levels.
4. What is the maximum propagation delay of the SN74LS642NSR?
The maximum propagation delay is 15 ns at 5V.
5. What is the package type of the SN74LS642NSR?
It comes in a 20-pin SOIC (Small Outline Integrated Circuit) package.
6. Can this device be used in industrial environments?
Yes, it is designed to operate reliably in industrial environments with a temperature range of 0°C to 70°C.
7. What is the output current capability of the SN74LS642NSR?
The device can source up to 24 mA of high-level output current.
8. Is the SN74LS642NSR suitable for surface mount technology (SMT)?
Yes, it is designed for surface mount applications, making it ideal for PCB assembly.
9. What are the typical applications of this device?
Typical applications include industrial automation, telecommunications, and embedded systems.
10. Does the SN74LS642NSR support bidirectional data flow?
Yes, it supports bidirectional data flow, enabling data transfer in both directions between two buses.
