MAX3089

True Fail-Safe Receiver While Maintaining
    EIA/TIA-485 Compatibility
 Enhanced Slew-Rate Limiting Facilitates
    Error-Free Data Transmission
    (MAX3080MAX3085/MAX3089)
1nA Low-Current Shutdown Mode (except
    MAX3081/MAX3084/MAX3087)
 Pin-Selectable Full/Half-Duplex Operation
    (MAX3089)
Phase Controls to Correct for Twisted-Pair
    Reversal (MAX3089)
Allow Up to 256 Transceivers on the Bus

Supply Voltage (V_CC) .............................................................+7V
Control Input Voltage (RE, DE)......................-0.3V to (V_CC+ 0.3V)
Special Input Voltage

 (H/F, SRL, TXP, RXP)......................................-0.3V to (V_CC+ 0.3V)
Driver Input Voltage (DI)................................-0.3V to (V_CC+ 0.3V)
Driver Output Voltage (A, B, Y, Z)...........................................±13V
Receiver Input Voltage (A, B).................................................±13V
Receiver Input Voltage, Full Duplex (A, B)..............................±25V
Receiver Output Voltage (RO)................,,,,....-0.3V to (V_CC+ 0.3V)

Continuous Power Dissipation
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)..,,,,,,,.727mW
8-Pin SO (derate 5.88mW/°C above +70°C)......................471mW
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C)........800mW
14-Pin SO (derate 8.33mW/°C above +70°C)....................667mW
Operating Temperature Ranges
MAX308_C_ _...........................................................0°C to +70°C
MAX308_E_ _........................................................-40°C to +85°C
Storage Temperature Range...............................-65°C to +150°C
Lead Temperature (soldering, 10sec)................................+300°C

The MAX3080MAX3089 high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-sacircuitry,which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logictransmitterson a terminated bus are disabled (high impedance).The MAX3080/MAX3081/MAX3082 feature reducedslew-rate drivers that minimize EMI and reduce reflec-tions caused by improperly terminated cables, allowingerror-free data transmission up to 115kbps. The MAX3083/MAX3084/MAX3085 offer higher driver out-slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086/MAX3087/MAX3088's driver slew rates are not limited, making transmit speeds up10Mbps possible. The MAX3089's slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a single three-state  driver.

These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.All devices have a 1/8-unit-load receiver input imped- ance that allows up to 256 transceivers on the bus. TheMAX3082/MAX3085/MAX3088 are intended for half-duplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selec- table between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase viaseparate pins.