MAX13448E

The MAX13448E includes a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion. The driver and receiver feature active-high and active-low enables, respectively, that can be connected together externally to serve as a direction control. The device is available in a 14-pin SO package and operates over the extended -40°C to +85°C temperature range. The device full-duplex RS-485 transceiver features inputs and outputs fault protected up to ±80V (with respect to ground). The device operates from a +3.0V to +5.5V supply and features true fail-safe circuitry, guaranteeing a logic-high receiver output when the receiver inputs are open or shorted. This enables all receiver outputs on a terminated bus to output logichigh when all transmitters are disabled. The MAX13448E features a slew-rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 500kbps with a +5V supply, and 250kbps with a +3.3V supply. It features an 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus. All driver outputs are protected to ±8kV ESD using the Human Body Model.

The features of MAX13448E can be summarized as (1)±80V fault protection on the RS-485 I/O ports; (2)true fail-safe receiver; (3)hot-swap input structure on DE; (4)ESD protection on the RS-485 I/O Ports ±8kV human body model; (5)slew-rate limiting facilitates error-free data transmission; (6)1/8-unit load allows up to 256 transceivers on the bus; (7)-7V to +12V common-mode input voltage range; (8)+3.0V to +5.5V Operating supply voltage; (9)available in 14-pin SO package.

The absolute maximum ratings of MAX13448E are (1)supply voltage: (VCC): +6V; (2)control input voltage: (RE, DE): -0.3V to (VCC + 0.3V); (3)driver input voltage: (DI): -0.3V to (VCC + 0.3V); (4)receiver input voltage: (A, B (Note 1)): ±80V; (5)driver output voltage (Y, Z (Note 1)): ±80V; (6)receiver output voltage (RO):-0.3V to (VCC + 0.3V); (7)short-circuit duration (RO, A, B): Continuous; (8)continuous power dissipation (TA = +70°C)14-Pin SO (derate 8.3mW/°C above +70°C):667mW; (9)operating temperature range: -40°C to +85°C; (10)junction temperature:+150°C; (11)storage temperature range: -65°C to +150°C; (12)lead temperature (soldering, 10s): +300°C.