The MAX3311/MAX3313 are low-power, +5V EIA/TIA-232-compatible transceivers. Both devices have one transmitter and one receiver. The transceivers have a proprietary low-dropout transmitter output stage enabling RS-232-compatible operation from a +5V sup- ply with a single inverting charge pump. These devices require only three 0.1µF capacitors and will run at data rates up to 460kbps while maintaining RS-232-compati- ble output levels. The MAX3311 features a 1µA shutdown mode. In shut- down the device turns off the charge pump, pulls V- to ground, and the transmitter output is disabled. The MAX3313 features an INVALID output that asserts high when an active RS-232 cable signal is connected, sig- naling to the host that a peripheral is connected to the communication port.
The MAX3311 and MAX3313 are low‑power, +5 V EIA/TIA‑232‑compatible transceivers that integrate a single transmitter and receiver in a 10‑pin µMAX package. They operate from a single +5 V supply using an inverting charge‑pump that requires only two 0.1 µF capacitors, and they support data rates up to 460 kbps while maintaining RS‑232‑compatible voltage levels.
The MAX3311 includes a 1 µA shutdown mode that disables the transmitter and pulls the charge‑pump output to ground, whereas the MAX3313 provides an INVALID output that goes high when a valid RS‑232 signal is present on the receiver input. Detailed electrical, timing, and operating characteristics are provided, along with pin descriptions and typical application circuits.
| Supply Voltage Range (VCC) | 4.5 V – 5.5 V |
|---|---|
| Maximum Data Rate | 460 kbps |
| Supply Current (normal operation) | 100 µA – 250 µA |
| Shutdown Supply Current (MAX3311) | 1 µA |
| Input Logic Low Threshold (VIL) | 0.8 V |
The transceivers support data rates up to 460 kbps.
In shutdown mode the MAX3311 draws about 1 µA.
Two 0.1 µF capacitors (C1 and C2) are required for the charge‑pump.