MAX3313CUB+

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The MAX3313CUB+ is a logic-level transceiver designed specifically for RS232 interfaces and designed to provide robust operation with low power consumption. The device offers full hardware handshake flow control to ensure reliable data transfers in noisy environments by maintaining an active connection between the receiver and transmitter even when signals are transmitted. The main features include an operating voltage range of 3V to 5.5V, two independent transceivers, integrated current-limiting protection against short-circuits or excessive voltage spikes, and a driver enable input to power-down the interface when not in use. Furthermore, the circuit\'s high noise immunity makes it well suited to commercial and military applications, due to its ability to reject noise and false signals.

The MAX3313CUB+ is designed to be used in applications that require low-power, robust RS232 line drivers/receivers such as modems, point-of-sale terminals, and automated instruments. Its receiver is enabled by a 5 volt logic signal and has a high voltage excursion of over ±15 volts. Its transmitter provides sufficient current to drive up to 15V on a single line with two AA-type dry cells, or up to +20V across two lines from a single 9V battery.

The device operates by translating a serial logic level into a 10V peak-to-peak differential RS232 voltage level. The receiver translates the 10V input signal into two logic signals that are set according to the magnitude of the differential voltage. When the receiver is enabled, a logic high at the enable pin causes the serial data to be received and drives the logic levels of the receiver outputs. If the logic low at the enable, the receiver stops receiving data and the outputs will be driven to their default logic levels.

The MAX3313CUB+ transceiver allows data to be transmitted while controlling the current in the signals, protecting against shorts and excessive voltage spikes. It operates with a 0V to 5V output level and provides current-limited protection in the event of an overvoltage condition. When transmitting data, the device automatically limits the current to 6mA, preventing bus contention and protecting against voltage spikes. When not transmitting data, the device disables the driver, reducing power consumption and improving electromagnetic compatibility.

The MAX3313CUB+ logic-level transceiver offers a compact, low-power solution for applications requiring robust RS232 line drivers and receivers. The device offers full hardware handshake flow control, built-in current-limiting protection, and a driver enable input for improved power consumption. By providing these features in a single package, the MAX3313CUB+ helps reduce the complexity and cost of implementing RS232 interfaces.

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