MAX3209E is a dual DTE RS-232 serial port chip from Texas Instruments that ensures compliance with the stringent ESD requirements of the European Community. The device minimizes board space and power consumption by eliminating the need for a negative power supply; it integrates two serial ports and a charge pump into a single 38-pin TSSOP package. During standby, while the device oper- ates from the single +3V to +5.5V logic supply, one receiver on each port remains active, allowing automatic system wake-up when peripheral communications resume.
The MAX3209E is a complete dual DTE RS‑232 serial port IC (6 transmitters, 10 receivers) designed for motherboards and desktop PCs. It operates from a single +12 V supply and a logic supply of +3 V to +5.5 V, providing a low‑power standby mode of 50 µA.
Key features include ±15 kV Human Body Model ESD protection, ±8 kV IEC 1000‑4‑2 contact discharge, ±15 kV IEC 1000‑4‑2 air‑gap discharge, and the ability to drive serial mice at data rates up to 460 kbps. The device meets IEC 1000‑4‑2 and IEC 1000‑4‑4 standards for harsh environments.
| Number of Transmitters | 6 |
|---|---|
| Number of Receivers | 10 |
| Package | 38‑pin TSSOP (also available in QFN) |
| Supply Voltage (VDD) | +10.8 V to +13.2 V |
| Standby Voltage (VSTBY) | +3 V to +5.5 V |
| Standby Current | 50 µA |
| Maximum Data Rate | 460 kbps |
| ESD Protection (Human Body Model) | ±15 kV |
| ESD Protection (Contact Discharge) | ±8 kV |
| ESD Protection (Air‑Gap Discharge) | ±15 kV |
It provides two complete serial ports with a total of six transmitters and ten receivers.
The device draws only 50 µA in low‑power standby mode.
It is protected to ±15 kV Human Body Model, ±8 kV IEC 1000‑4‑2 Contact Discharge, and ±15 kV IEC 1000‑4‑2 Air‑Gap Discharge.
The IC supports data rates up to 460 kbps, compatible with LapLink software.