Single Transmitter/Receiver RS-232 30-Pin UCSP T/R

The MAX3228E/AE and MAX3229E/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 MAX3228E/AE and MAX3229E/AE achieve a 1µA supply current with Maxim’s AutoShutdown feature. They save power without changes to 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 MAX3228E/AE and MAX3229E/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 MAX3228E/AE and MAX3229E/AE compatibility with multiple logic families. The MAX3229E/AE contains one receiver and one transmitter. The MAX3228E/AE contains two receivers and two transmitters. The MAX3228E/AE and MAX3229E/AE are available in tiny chip-scale and WLP packaging and are specified across the extended industrial temperature range of -40°C to +85°C.

• 6 × 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

Meets 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