SN75ALS197DR

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The SN75ALS197DR is an improved version of the SN75ALS196DR. It is designed to operate with TTL level digital inputs and open-collector outputs. It is a quad-driver, dual-receiver Universal Bus Transceiver (UBT), which is designed to facilitate data communication across various interface types. It contains four bidirectional PNP/NPN transistor drivers and two dual-input open-collector high-impedance receivers. The integrated circuitry of this device ensures reliable, effective and interconnectivity across different interface types. It performs the exchange of TTL-level signals between the driver and the receiver without additional external components. The device works as a high-speed, low power and low voltage interface for communication between interfacing agents.

Features

• Dual-receiver input/output interface for both TTL and open-collector switches
• Quad-channel driver and 2 dual-channel receiver
• Two dual-input open-collector high-impedance receivers
• High-speed operation and low power consumption
• Low voltage operation down to 2V

Applications

The SN75ALS197DR can be used in many applications. Its intended use is as an interface between TTL and open-collector switches, providing a bridge between various digital components and systems. For example, it can be used to transmit data between multiple advanced logic integrated circuits, multiplexers and decoding circuits, host processors and memory modules, programmable logic control modules, and other miscellaneous interconnection applications. It can also be used to provide the physical link between cross-platform communication protocols, such as RS232, I2C, and SPI. Additionally, it is also used in systems with multiple DMA transfer modes, such as in storage area networks and industrial robotics.

Working Principle

The SN75ALS197DR is based on a four-driver, dual-receiver Universal Bus Transceiver (UBT) architecture. It works on the simple principle of data exchange between the driver and the receiver. The driver contains four independent PNP/NPN transistor gates, each configured to drive one of two receivers. Each receiver has two inputs, and a pair of Schmitt triggers that convert the incoming signal into either a logic high or low level, depending on the configuration. The receiver also contains a hysteresis circuit to provide additional noise immunity. When a logic level is applied to either of the inputs, the receiver will output a corresponding logic level in accordance with the condition applied. The integrated circuitry of the device ensures reliable data exchange without compromising the noise immunity.

Conclusion

The SN75ALS197DR is a quad-driver, dual-receiver Universal Bus Transceiver (UBT) that interfaces TTL level digital inputs and open-collector outputs. It operates on the simple principle of data exchange between the driver and the receiver. It is used in many applications ranging from interfacing advanced logic integrated circuits, to providing interconnection between different communication protocols. Its integrated circuitry ensures reliable, effective and low power operation for a variety of systems.

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