The MAX3188E/MAX3189E single RS-232 transmitters in a SOT23-6 package are for space- and cost-constrained applications requiring minimal RS-232 communications. These devices consume only 150µA of supply current from ±4.5V to ±6V supplies. They feature a shutdown input that reduces current consumption to only 1µA and forces the transmitter output into a high-impedance state. RS-232 data transmission is guaranteed up to 250kbps with the MAX3188E and up to 1Mbps with the MAX3189E. The MAX3188E/MAX3189E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232-compliant signals. The transmitter output is protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, to ±8kV using the IEC 1000-4-2 Contact Discharge method, and to ±15kV per the Human Body Model, ensuring strict compliance with international standards. The MAX3188E/MAX3189E transmitters have a standard inverting output.
The MAX3188E and MAX3189E are single‑channel RS‑232 transmitters designed for space‑ and cost‑constrained applications. They operate from ±4.5 V to ±6 V supplies, consume only 150 µA in normal mode and as little as 1 µA when shutdown, and provide ESD protection up to ±15 kV.
Both devices convert CMOS/TTL logic to RS‑232 signals, with the MAX3188E supporting up to 250 kbps and the MAX3189E up to 1 Mbps. The shutdown input forces the output into a high‑impedance state, allowing safe sharing of the signal line. The datasheet includes electrical characteristics, pin descriptions, application notes, and ordering information.
| Operating Supply Current | 150 µA |
|---|---|
| Shutdown Supply Current | 1 µA |
| Data Rate (MAX3188E) | 250 kbps |
| Data Rate (MAX3189E) | 1 Mbps |
| Supply Voltage Range | ±4.5 V to ±6 V |
| ESD Protection | ±15 kV (Human Body Model) |
| Operating Temperature Range | -40 °C to +85 °C |
Driving SHDN low reduces the supply current to 1 µA and forces the TOUT output into a high‑impedance state.
Both devices operate from ±4.5 V to ±6 V dual supplies.
The transmitter outputs are protected up to ±15 kV according to the Human Body Model.