The MAX13234E–MAX13237E are +3V to +5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces with high data-rate capabilities (up to 3Mbps), a flexible logic voltage interface, and enhanced electrostatic discharge (ESD) protection. All receiver inputs and transmitter outputs are protected to ±15kV IEC 61000–4-2 Air Gap Discharge, ±8kV IEC 61000-4-2 Contact Discharge, and ±15kV Human Body Model. The MAX13234E/MAX13235E have two receivers and two transmitters, while the MAX13236E/MAX13237E have a single receiver and transmitter. The transmitters have a low-dropout transmitter output stage, delivering true RS-232 performance from a +3V to +5.5V supply based on a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. All devices achieve a 1µA supply current using Maxim’s AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the devices driving the transmitter and receiver inputs are inactive for more than 30s. The MAX13234E–MAX13237E are available in space-saving TQFN and TSSOP packages and operate over the -40°C to +85°C extended temperature range.
The MAX13234E‑MAX13237E family are +3 V to +5.5 V powered EIA/TIA‑232 and V.28/V.24 communication interfaces that support data rates up to 3 Mbps. They feature a flexible low‑voltage logic interface, enhanced ESD protection, and Maxim’s AutoShutdown Plus™ that reduces supply current to 1 pA when the RS‑232 cable is disconnected.
Available in space‑saving TSSOP and TQFN‑EP packages, the devices operate from –40 °C to +85 °C (extended to +105 °C for some specifications). The datasheet provides absolute maximum ratings, electrical characteristics, timing diagrams, typical operating curves, pin configurations, and ordering information.
| Data Rate | Up to 3 Mbps |
|---|---|
| Supply Voltage | +3 V to +5.5 V |
| AutoShutdown Plus Shutdown Current | 1 pA |
| Package Types | TSSOP (20‑pin) and TQFN‑EP (16‑pin or 20‑pin) |
The devices support data rates up to 3 Mbps.
They operate from +3 V to +5.5 V.
AutoShutdown Plus reduces the shutdown current to 1 pA.