MAX13487E

The MAX13487E/MAX13488E feature a 1/4-unit load receiver input impedance, allowing up to 128 trans- ceivers on the bus. These devices are intended for half- duplex communications. The MAX13487E 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 MAX13488E driver slew rate is not limited, allowing transmit speeds up to 16Mbps. All driver outputs are protected to ±15kV ESD using the Human Body Model. The MAX13487E/MAX13488E are available in an 8-pin SO package. The devices operate over the extended -40°C to +85°C temperature range. The MAX13487E/MAX13488E +5V, half-duplex, ±15kV ESD-protected RS-485/RS-422-compatible transceivers feature one driver and one receiver. The MAX13487E/ MAX13488E include a hot-swap capability to eliminate false transitions on the bus during power-up or live insertion. The MAX13487E/MAX13488E feature Maxim's propri- etary AutoDirection control. This architecture makes the devices ideal for applications, such as isolated RS-485 ports, where the driver input is used in conjunction with the driver-enable signal to drive the differential bus.

The features of MAX13487E can be summarized as (1)+5V operation; (2)autodirection enables driver automatically on transmission; (3)hot-swappable for telecom applications; (4)enhanced slew-rate limiting facilitates error- free data transmission (MAX13487E); (5)high-speed version (MAX13488E)allows for transmission speeds up to 16Mbps; (6)extended ESD protection for RS-485 I/O Pins ±15kV human body model; (7)1/4-unit load, allowing up to 128 Transceivers on the Bus; (8)8-Pin SO Package.

The absolute maximum ratings of MAX13487E are (1)supply voltage: VCC: +6V; (2)SHDN, RE, DI:-0.3V to +6; (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; (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.