10Mbps Integrated Circuit Chip MAX3085 CPA RS-485 / RS-422 Transceivers
small scale integrated circuits
,integrated components
10Mbps Integrated Circuit Chip MAX3085 CPA RS-485 / RS-422 Transceivers
General Description
The MAX3080–MAX3089 high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3080/MAX3081/MAX3082 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The MAX3083/MAX3084/MAX3085 offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086/MAX3087/MAX3088’s driver slew rates are not limited, making transmit speeds up to 10Mbps 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 impedance that allows up to 256 transceivers on the bus. The MAX3082/MAX3085/MAX3088 are intended for halfduplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins.
Next Generation Device Features
♦ For Fault-Tolerant Applications:
MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4- Unit Load, +3.3V RS-485 Transceiver
♦ For Low-Voltage Applications:
MAX3362: +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package
♦ For Multiple Transceiver Applications:
MAX3030E–MAX3033E: ±15kV ESD-Protected, +3.3V, Quad, RS-422 Transmitters MAX3040–MAX3045: ±10kV ESD-Protected, Quad, +5V, RS-485/RS-422 Transmitters
Applications
RS-422/RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Ordering Information
| PART | TEMP RANGE | PIN-PACKAGE |
| MAX3080CSD | 0°C to +70°C | 14 SO |
| MAX3080CPD | 0°C to +70°C | 14 Plastic DIP |
| MAX3080ESD | -40°C to +85°C | 14 SO |
| MAX3080EPD | -40°C to +85°C | 14 Plastic DIP |
NO-LOAD SUPPLY CURRENT OUTPUT CURRENT
vs. TEMPERATURE vs. RECEIVER OUTPUT LOW VOLTAGE
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