The MAX13410E–MAX13415E are half-duplex RS-485-/RS- 422-compatible transceivers optimized for isolated applications. These devices feature an internal low-dropout regulator (LDO), one driver, and one receiver. The internal LDO allows the part to operate from an unregulated power supply of up to 28V. The AutoDirection feature reduces the number of optical isolators needed in isolated applications. Other features include enhanced ESD protection, fail-safe circuitry, slew-rate limiting, and full-speed operation. The MAX13410E–MAX13415E internal LDO generates a 5V ±10% power supply that is used to power its internal circuitry. The MAX13412E–MAX13415E bring the 5V to an output VREG that allows the user to power additional external circuitry with up to 20mA to further reduce external components. The MAX13410E/MAX13411E do not have a 5V output and come in industry-compatible pinouts. This allows easy replacement in existing designs. The MAX13410E–MAX13415E feature a 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are ESD protected using the Human Body Model. These devices also include fail-safe circuitry (MAX13410E/MAX13411E/ MAX13414E/MAX13415E only), guaranteeing a logic-high receiver output when the receiver inputs are open or shorted. The receiver outputs a logic-high when the transmitter on the terminated bus is disabled (high impedance). The MAX13412E/MAX13413E feature Maxim’s proprietary
The MAX13410E‑MAX13415E family are half‑duplex RS‑485/RS‑422 compatible transceivers optimized for isolated applications. They integrate a low‑dropout regulator (LDO) that provides a 5 V ±10 % supply for internal circuitry and, in selected parts, a 5 V output capable of sourcing up to 20 mA for external circuits. The AutoDirection feature eliminates the need for separate DE/RE control signals, reducing the number of optical isolators required.
Key electrical characteristics include a wide input supply range of +6 V to +28 V, operation over –40 °C to +85 °C, and selectable data rates up to 500 kbps (slew‑rate‑limited) or 16 Mbps (full‑speed). The devices also provide enhanced ESD protection, fail‑safe circuitry, and a low 65 µA typical shutdown current.
| Input Supply Voltage Range | +6 V to +28 V |
|---|---|
| LDO Output Voltage | 5 V ±10 % |
| 5 V Output Current Capability | Up to 20 mA |
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum Data Rate (full‑speed) | 16 Mbps |
| Shutdown Supply Current | Low 65 µA (typ) |
| ESD Protection (Human Body Model) | ±15 kV (MAX13412E/13E) / ±14 kV (MAX13410E/11E) |
AutoDirection reduces the number of optical isolators needed in isolated applications by eliminating separate DE/RE control signals.
The devices have a 1/8‑unit load receiver input impedance, allowing up to 256 transceivers on the bus.
They provide ±15 kV Human Body Model ESD protection on the A and B pins.
The typical shutdown supply current is 65 µA.