MAX13485E

The MAX13485E features reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free trans- mission up to 500kbps. The MAX13486E driver slew rate is not limited, allowing transmit speeds up to 16Mbps. The MAX13485E/MAX13486E feature a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. The MAX13485E/MAX13486E include a hot-swap capability to eliminate false transitions on the bus during power-up or live-insertion. These devices are intended for half-duplex communications. All driver outputs are protected to ±15kV ESD using the Human Body Model. The MAX13485E/ MAX13486E are available in 8-pin SO and space-saving 8-pin DFN packages. The devices operate over the extended -40°C to +85°C temperature range. The MAX13485E/MAX13486E +5V, half-duplex, ±15kV ESD-protected RS-485 transceivers feature one driver and one receiver. These devices include fail-safe circuitry, guaranteeing a logic-high receiver output when receiver inputs are open or shorted. The receiver outputs a logic- high if all transmitters on a terminated bus are disabled (high impedance).

The features of MAX13485E can be summarized as (1)+5V operation; (2)true fail-safe receiver while maintaining EIA/TIA-485 compatibility; (3)hot-swappable for telecom applications; (4)enhanced slew-rate limiting facilitates error- free data transmission (MAX13485E); (5)high-speed version (MAX13486E)allows for transmission speeds up to 16Mbps; (6)extended ESD protection for RS-485/RS-422 I/O Pins ±15kV using human body model; (7)1/4 unit load, allowing up to 128 transceivers on the Bus; (8)available in space-saving 8-Pin DFN or industry standard 8-Pin SO Packages.

The absolute maximum ratings of MAX13485E are (1)VCC: +6V; (2)DE, RE, DI: -0.3V to +6V; (3)A, B: -8V to 13V; (4)short-circuit duration (RO, A, B)to GND: continuous; (5)continuous power dissipation (TA = +70°C)8-Pin SO (derate 5.9mW/°C above +70°C):471mW/ 8-Pin DFN (derate 4.8mW/°C above +70°C): 380.6mW; (6)operating temperature range: -40°C to +85°C; (7)junction temperature:+150°C; (8)storage temperature range: -65°C to +150°C; (9)lead temperature (soldering, 10s): +300°C.