MAXIM MAX251ESD+

The MAX250 and MAx251 chipset form the heart of a complete, electrically isolated, RS - 232 dual transmitter/receiver. By combining many functions on two chips, the cost and complexity required for an isolated digital interface is greatly reduced. Four low cost optocouplers, four capacitors, a diode and a small pot - core type transformer are all that are required to complete a 19.2k baud transceiver. Faster data rates are possible by using high speed optocouplers. In addition to the driving and receiving circuitry for the optocouplers, the chipset includes a push - pull transformer driver to supply power to the interface's isolated side.

The MAX250 and MAx251, together with four optocouplers and a transformer, form an isolated dual RS - 232 transmitter and receiver. The MAx250 connects to the non - isolated or logic side of the interface, translating logic signals to and from the optocouplers, while the MAx251 resides on the isolated side.

• Four low cost optocouplers, four capacitors, a diode and a small pot - core type transformer are required to complete a 19.2k baud transceiver
• Faster data rates are possible by using high speed optocouplers
• Single +5V operation
• A low power shutdown mode
• Output enable control for three - state operation
• Supplied in 14 lead DlP, 14 lead small outline and 20 leadless chip carrier packages

• High Noise Data Communications
• Industrial Communications
• Data Links To Analog Circuits
• Bridge Ground Differentials
• Isolated Data Interface