The MAX250EPD+ is a +5V powered, isolated, RS232 driver/receiver in 14 pin DIP package. It is a chip set form the heart of a complete electronically isolated RS232 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 chip set includes a push-pull transformer driver to supply power to the interface's isolated side. This device is used in bridge ground differentials and data links to analogue circuits.
- Supply voltage range is 4.5V to 5.5V
- Operating temperature range from -40°C to 85°C
- Isolated data interface
- Shut down supply current is 100μA at TA=55°C to 125°C, maximum operating supply current is 0.5mA
- Shutdown power is 5μW
- 2 transmitters and 2 receivers
- Switching frequency is 275KHz at TA=25°C
- Maximum on- resistance power driver is 50 ohm at 25mA
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