MAX3491E Datasheet | Maxim Integrated

Description Devices in the MAX3483E family (MAX3483E/MAX3485E/ MAX3486E/MAX3488E/MAX3490E/MAX3491E) are ±15k V ESD-protected, +3.3V, low-power transceivers for RS-485 and RS-422 munications. Each device contains one driver and one receiver. The MAX3483E and MAX3488E 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 MAX3486E transmits up to 2.5Mbps. The MAX3485E, MAX3490E, and MAX3491E transmit at up to 12Mbps. All devices feature enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15k V using IEC 1000-4-2 Air-Gap Discharge, ±8k V using IEC 1000-4-2 Contact Discharge, and ±15k V using the Human Body Model. Drivers are short-circuit current limited and are protected 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 MAX3488E, MAX3490E, and MAX3491E feature fullduplex munication, while the MAX3483E, MAX3485E, and MAX3486E are designed for half-duplex munication. Applications - - Telemunications - - Industrial-Control Local Area Networks - - Transceivers for EMI-Sensitive Applications - - Integrated Services Digital Networks - - Packet Switching Features - - ESD Protection for RS-485 I/O Pins - ±15k V- Human Body Model - ±8k V- IEC 1000-4-2, Contact Discharge - ±15k V- IEC 1000-4-2, Air-Gap Discharge - - Operate from a Single +3.3V Supply- No Charge Pump Required - - Interoperable with +5V Logic - - Guaranteed 12Mbps Data Rate (MAX3485E/MAX3490E/MAX3491E) - - Slew-Rate Limited for Errorless Data Transmission (MAX3483E/MAX3488E) - - 2n A Low-Current Shutdown Mode (MAX3483E/MAX3485E/MAX3486E/MAX3491E) - - -7V to +12V mon-Mode Input Voltage Range - - Full-Duplex and Half-Duplex Versions...