General Description The MAX3230E/AE and MAX3231E/AE are +2.5V to +5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces with low power requirements, high datarate capabilities, and enhanced electrostatic discharge (ESD) protection, in a chip-scale package (UCSP™) and WLP package. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model. The MAX3230E/AE and MAX3231E/AE achieve a 1μA supply current with Maxim’s AutoShutdown™ feature. They save power without changing the existing BIOS or operating systems by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off. The transceivers have a proprietary low-dropout transmitter output stage, delivering RS-232-compliant performance from a +3.1V to +5.5V supply, and RS-232-compatible performance with a supply voltage as low as +2.5V. The dual charge pump requires only four, small 0.1μF capacitors for operation from a +3.0V supply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The MAX3230E/AE and MAX3231E/AE offer a separate power-supply input for the logic interface, allowing configurable logic levels on the receiver outputs and transmitter inputs. Operating over a +1.65V to VCC range, VL provides the MAX3230E/AE and MAX3231E/AE compatibility with multiple logic families. The MAX3231E/AE contains one receiver and one transmitter. The MAX3230E/AE contains two receivers and two transmitters. The MAX3230E/AE and MAX3231E/AE are available in tiny chip-scale and WLP packaging and are specified across the extended industrial (-40°C to +85°C) temperature range. Features ♦ 6 x 5 Chip-Scale Package (UCSP) and WLP Package ♦ ESD Protection for RS-232 I/O Pins ±15kV—IEC 1000-4-2 Air-Gap Discharge ±8kV—IEC 1000-4-2 Contact Discharge ±15kV—Human Body Model ♦ 1μA Low-Power AutoShutdown ♦ 250kbps Guaranteed Data Rate ♦ Meet EIA/TIA-232 Specifications Down to +3.1V ♦ RS-232 Compatible to +2.5V Allows Operation from Single Li+ Cell ♦ Small 0.1μF Capacitors ♦ Configurable Logic Levels Applications Personal Digital Assistants Cell-Phone Data Lump Cables Set-Top Boxes Handheld Devices Cell Phones
