SN75189ANSR

Introduction

The SN75189ANSR is a high-performance dual monolithic line driver designed to operate from a single 5-volt supply. It is designed to meet the requirements of EIA Standard RS-232 and to provide an interface between computers and long-distance, high-speed and wide-band communications. This device is based on two-level driver/receiver/transceiver architecture, and so is referred to as a dual quad driver/receiver. This device is composed of four independent line drivers and receivers, which operate independently to provide the full RS-232C interface.

Application Field

The SN75189ANSR is an ideal choice for digital line drivers used in telecommunications, data communication, control and instrumentation systems. The device can be used for a variety of communication links, including serial digital data links, bus systems, multiplexer circuits, point-to-point digital systems, data multiplexer circuits for telecommunication systems, digital transceiver circuits for digital compensation, digital audio signals, and digital image processing systems.

The SN75189ANSR is also well suited for applications that require high signal-to-noise ratio, wideband outputs, and low power consumption. The device is suitable for interfacing with a variety of signal formats and signal types, including TTL, EIA/RS-485, RS-422, LVDs, TTL, DCXB, Manchester, DTMF, telephone networks, FSK, GSM, AMPS and PCM. The device is also capable of providing data rates up to 500 kilobits per second (Kbps).

Working Principle

The SN75189ANSR consists of four independent line drivers, consisting of two driver circuits each, sharing a common output and a single receiver circuit. The two driver circuits of each line drive independently, with no direct connection between them. This allows the device to provide two levels of output voltage, providing the capability to drive long cables and low-impedance communications networks.

The SN75189ANSR uses a patented current-limiting technology to maintain constant output current and to minimize cross talk and noise. This current-limiting circuitry acts as a self-adjusting circuit, so that when an increased current is needed, the output current is automatically increased, and when a decreased current is needed, it is automatically reduced. This feature allows for improved performance and reliable operation.

The received signals are processed by an internal receiver circuit, which converts the received signals into a TTL compatible logic level. This logic level is then used to drive the output logic levels. The SN75189ANSR has the ability to buffer up to 32 received signals, so that multiple signals can be received with no interference. This allows for improved reliability and performance.

Conclusion

The SN75189ANSR is a high-performance dual monolithic line driver designed to operate from a single 5-volt supply. It is designed to meet the requirements of EIA Standard RS-232 and to provide an interface between computers and long-distance, high-speed and wide-band communications. The device is an ideal choice for a wide variety of communication links, including serial digital data links, bus systems, multiplexer circuits, point-to-point digital systems, data multiplexer circuits for telecommunication systems, digital transceiver circuits for digital compensation, digital audio signals, and digital image processing systems. The device is also well suited for applications requiring high signal-to-noise ratio, wideband outputs, and low power consumption.