MAXIM MAX1406CPE+

The MAX1406 is an RS-232 IC designed to meet the stringent electrostatic discharge (ESD) requirements of the European community. All transmitter outputs and receiver inputs are protected to ±15kV using IEC1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model. The MAX1406 has three RS-232 transmitters and three RS-232 receivers, and is optimized for operation in printer, modem, and telecom applications. It is guaranteed to run at data rates up to 230kbps, providing compatibility with popular software for communicating with personal computers. Power-supply current is less than 500μA for IDD and ISS, and less than 1mA for ICC. The MAX1406 is pin and functionally compatible with the industry-standard MC145406, so existing designs can instantly become Electromagnetic Compatibility (EMC) compliant. The MAX1406 is available in DIP and SO packages, and in a tiny SSOP that reduces board space. The transmitters are inverting level translators that convert CMOS-logic input levels to an EIA/TIA-232 voltage between ±5V and ±13.2V, into a load between 3kΩ and 7kΩ. The MAX1406 guarantees a 230kbps data rate with a worst-case load of 3kΩ and 1000pF, providing compatibility with PC-to-PC communication software. When the power is off, the MAX1406 outputs are permitted to be driven up to ±15V. The transmitter inputs do not have internal pull-up resistors. Connect unused inputs to GND or VCC. The receiver inputs invert and convert the RS-232 signals to CMOS-logic output levels. The MAX1406 has hysteresis of 650mV. The receiver output swings between GND and VCC. As with all Maxim devices, electrostatic discharge (ESD) protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The MAX1406 driver outputs and receiver inputs have extra protection against static electricity found in normal operation. Maxim’s engineers developed state-of-the-art structures to protect these pins against ±15kV ESD without damage. After an ESD event, the MAX1406 continues working without latchup.

• Enhanced ESD Protection: ±15kV Human Body Model ±8kV IEC1000-4-2, Contact Discharge ±15kV IEC1000-4-2, Air-Gap Discharge
• Latchup Free During an ESD Event
• 16-Pin SSOP or SO Packages
• Guaranteed 230kbps Data Rate
• Flow-Through Pinout
• Pin Compatible with MC145406

• Telecommunications
• Modems
• Printers
• Instruments
• Equipment Meeting IEC1000-4-2