The MAX202 device consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 5-V supply. The device operates at data signaling rates up to 120 kbit/s and a maximum of 30-V/µs driver output slew rate.
The MAX202 provides two line drivers and two line receivers with a dual charge‑pump circuit, allowing operation from a single 5‑V supply. It meets TIA/EIA‑232‑F requirements and includes +15 kV ESD protection on all serial‑port pins.
Typical applications include battery‑powered systems such as PDAs, notebooks, and handheld equipment. The device is offered in several package options (PDIP, SOIC, TSSOP) with standard ordering numbers and recommended external capacitor values.
| Supply voltage range (VCC) | 4.5 V – 5.5 V |
|---|---|
| ESD protection (Human‑Body Model) | +15 kV |
| Driver output slew rate | 30 V/µs |
| Typical supply current (no load) | 15 mA |
| Input high‑level voltage (VIH) | 2 V |
| Input low‑level voltage (VIL) | 0.8 V |
It includes +15 kV Human‑Body Model ESD protection on the RS‑232 bus pins.
The recommended supply voltage range is 4.5 V to 5.5 V.
Four 0.1 µF capacitors (C1‑C4) are required, with values up to 10 µF acceptable.