MAX251ESD+

The MAX251ESD+ is a +5V powered, isolated, RS232 driver/receiver in 14 pin NSOIC 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
• Positive supply current is 2.5mA
• Shutdown power is 5µW
• 2 transmitters and 2 receivers
• 3-state enable time tEN is 3.5µS, 3-state disable time is 1µS
• Maximum threshold voltage is 2V

Note

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party