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The MAX3483, MAX3485, MAX3486, MAX3488, MAX3490, and MAX3491 are 3.3V, low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The MAX3483 and MAX3488 feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The partially slew-rate-limited MAX3486 transmits up to 2.5Mbps. The MAX3485, MAX3490, and MAX3491 transmit at up to 10Mbps. Drivers are short-circuit current limited and are protect ed against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if both inputs are open circuit. The MAX3488, MAX3490, and MAX3491 feature full duplex communication, while the MAX3483, MAX3485, and MAX3486 are designed for half-duplex communication.
Features
- Operate from a Single 3.3V Supply— No Charge Pump!
- Interoperable with +5V Logic
- 8ns Max Skew (MAX3485/MAX3490/MAX3491)
- Slew-Rate Limited for Errorless Data Transmission (MAX3483/MAX3488)
- 2nA Low-Current Shutdown Mode (MAX3483/MAX3485/MAX3486/MAX3491)
- -7V to +12V Common-Mode Input Voltage Range
- Allows up to 32 Transceivers on the Bus
- Full-Duplex and Half-Duplex Versions Available
- Industry Standard 75176 Pinout (MAX3483/MAX3485/MAX3486)
- Current-Limiting and Thermal Shutdown for
- Driver Overload Protection
Resources
