概述

The MAX3160/MAX3161/MAX3162 are programmable RS-232/RS-485/422 multiprotocol transceivers. The MAX3160/MAX3161 are pin programmable as a 2TX/2RX RS-232 interface or a single RS-485/422 transceiver. The MAX3162 is configured as a 2TX/2RX RS-232 interface and a single RS-485/422 transceiver simultaneously.

All devices incorporate a proprietary low-dropout transmitter output stage and an on-board dual charge pump to allow RS-232 and RS-485/422 compliant performance from a +3V to +5.5V supply. The receivers feature true fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted. These devices also feature pin-selectable transmitter slew rates for both RS-232 and RS-485/422 modes. Slew-rate limiting minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. Disabling slew-rate limiting allows these devices to transmit at data rates up to 10Mbps in RS-485/422 mode and up to 1Mbps in RS-232 mode. The MAX3160/MAX3161/MAX3162 feature a 1µA shutdown mode, and short-circuit limiting and thermal shutdown circuitry to protect against excessive power dissipation.

The MAX3160/MAX3162 offer a flow-through pinout that facilitates board layout. The MAX3160/MAX3161/MAX3162 are available in tiny SSOP packages and operate over the commercial and extended temperature ranges.

 

Single-Supply Operation from +3V to +5.5V

Pin-Programmable as 2TX/2RX RS-232 or Single RS-485/422 (MAX3160/MAX3161)

2TX/2RX RS-232 and Single RS-485/422 (MAX3162)

Pin-Programmable RS-232/RS-485 Transmitter Slew Rates Reduce EMI

10Mbps RS-485 and 1Mbps RS-232 Data Rates

Pin-Programmable Half-Duplex or Full-Duplex RS-485/422 Operation (MAX3160/MAX3161)

RS-485/422 True Fail-Safe Receivers

Transmitters and Receivers Protected Against Wiring Faults

1µA Shutdown Supply Current

1/8-Unit Load Allows up to 256 Transceivers on the Bus