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The MAX3160E/MAX3161E/MAX3162E are programma-ble RS-232/RS-485/RS-422 multiprotocol transceivers.The MAX3160E/MAX3161E are pin programmable as a 2Tx/2Rx RS-232 interface or a single RS-485/RS-422 transceiver. The MAX3162E is configured as a 2Tx/2RxRS-232 interface, and a single RS-485/RS-422 trans-ceiver simultaneously.
The MAX3160E/MAX3161E/MAX3162E feature enhanced electrostatic discharge (ESD) protection. All of the trans- mitter outputs and receiver inputs are protected to ±15kV using the Human Body Model.All devices incorporate a proprietary low-dropout trans- mitter output stage, and an on-board dual charge pumpto allow RS-232- and RS-485-/RS-422-compliant perfor-mance 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 RS-232 and RS-485/RS-422 modes. Slewrate 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/RS-422 mode and up to 1Mbps in RS-232 mode. The MAX3160E/MAX3161E/MAX3162E feature a 10nA shutdown mode, short-circuit limiting, and thermal shutdown circuitry to protect against excessive power dissipation.
The MAX3160E/MAX3162E offer a flow-through pin-out that facilitates board layout. The MAX3160E/MAX3161E/MAX3162E are available in tiny SSOP pack-ages and operate over the commercial and extendedtemperature ranges.
MAX3160ECAP Maximum Ratings
VCCto GND................................................................-0.3V to +6V V+ to GND.................................................................-0.3V to +7V V- to GND..................................................................-7V to +0.3V V+ - V- (Note 1)....................................................................+13V Input Voltages T1IN, T2IN, DI, DE485, RE485, TE232,RE232, SHDN, FAST, HDPLX, RS485/RS232to GND.....................-0.3V to +6V A, B, R1IN, R2IN to GND.................................................±25V Output Voltages T1OUT, T2OUT, Y, Z to GND (VCC= 0 or SHDN= GND)................................................................±13.2V T1OUT, T2OUT to GND (VCC= 5.5V and SHDN= VCC)......................................................-13.2V to +9V R2OUT, R1OUT, RO to GND.......................-0.3V to (VCC+ 0.3V)
MAX3160ECAP Features
Single Supply Operation from +3V to +5.5V ESD Protection ±15kV Human Body Model Pin-Selectable as 2Tx/2Rx RS-232 or Single RS-485/RS-422 (MAX3160E/MAX3161E) 2Tx/2Rx RS-232 and Single RS-485/RS-422(MAX3162E) Pin-Selectable RS-232/RS-485 Transmitter Slew Rates Reduce EMI 10Mbps RS-485 and 1Mbps RS-232 Data Rates Pin-Selectable Half-Duplex or Full-Duplex RS-485/RS-422 Operation (MAX3160E/MAX3161E) RS-485/RS-422 True Fail-Safe Receivers 10nA Shutdown Supply Current 1/8-Unit Load Allows up to 256 Transceivers on the Bus
MAX3160ECAP Typical Application
Point-of-Sales EquipmentPeripherals Industrial ControlsNetworking RS-232 to RS-485 Security Systems Interface Converters