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The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B are complete, electrically isolated, RS-485/RS-422 data-communications interface solutions in a hybrid microcircuit. Transceivers, optocouplers, and a transformer provide a complete interface in a standard DIP package. A single +5V supply on the logic side powers both sides of the interface.
The MAX1480B/MAX1480C/MAX1490B feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.
Drivers are short-circuit current limited and 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 known output (active-low RO low for the MAX1480A/B/C, RO high for the MAX1490A/B) if the input is open circuit.
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.
The MAX1480B/MAX1480C/MAX1490B feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.
Drivers are short-circuit current limited and 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 known output (active-low RO low for the MAX1480A/B/C, RO high for the MAX1490A/B) if the input is open circuit.
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.
Key Features
- For Integrated ESD Protection
- MAX1480E/MAX1490E: ±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces
- For Space-Constrained Applications
- MAX3157: High CMRR, RS-485 Transceiver with ±50V Isolation
Applications/Uses
- Automated Test Equipment (ATE)
- HVAC/Building Control Networks
- Industrial-Control Local Area Networks
- Isolated RS-485/RS-422 Data Interface
- Transceivers for EMI-Sensitive Applications
Parametric specs for RS-485/RS-422 Line Driver/Receivers
| # Tx/Rx | 1Tx + 1Rx |
| Duplex | Full |
| VSUPPLY (V) | 5 |
| Data Rate (kbps) (min) | 2500 |
| Galvanic Isolation (±V) | 1000 |
| ICC (mA) (typ) | 100 |
| Tx EN | No |
| Rx EN | No |
| ICC (Shutdn.) (µA) (typ) | 0.2 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP HYBRID/24 |
| Budgetary Price (See Notes) | $21.48 @1k |
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Technical Docs
| Data Sheet | Complete, Isolated RS-485/RS-422 Data Interface | Jun 08, 2005 |
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Parameters
Parametric specs for RS-485/RS-422 Line Driver/Receivers
| # Tx/Rx | 1Tx + 1Rx |
| Duplex | Full |
| VSUPPLY (V) | 5 |
| Data Rate (kbps) (min) | 2500 |
| Galvanic Isolation (±V) | 1000 |
| ICC (mA) (typ) | 100 |
| Tx EN | No |
| Rx EN | No |
| ICC (Shutdn.) (µA) (typ) | 0.2 |
| Oper. Temp. (°C) | -40 to +85 0 to +70 |
| Package/Pins | PDIP HYBRID/24 |
| Budgetary Price (See Notes) | $21.48 @1k |
Key Features
- For Integrated ESD Protection
- MAX1480E/MAX1490E: ±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces
- For Space-Constrained Applications
- MAX3157: High CMRR, RS-485 Transceiver with ±50V Isolation
Applications/Uses
- Automated Test Equipment (ATE)
- HVAC/Building Control Networks
- Industrial-Control Local Area Networks
- Isolated RS-485/RS-422 Data Interface
- Transceivers for EMI-Sensitive Applications
Description
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B are complete, electrically isolated, RS-485/RS-422 data-communications interface solutions in a hybrid microcircuit. Transceivers, optocouplers, and a transformer provide a complete interface in a standard DIP package. A single +5V supply on the logic side powers both sides of the interface.
The MAX1480B/MAX1480C/MAX1490B feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.
Drivers are short-circuit current limited and 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 known output (active-low RO low for the MAX1480A/B/C, RO high for the MAX1490A/B) if the input is open circuit.
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.
The MAX1480B/MAX1480C/MAX1490B feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX1480A/MAX1490A driver slew rate is not limited, allowing transmission rates up to 2.5Mbps. The MAX1480A/B/C are designed for half-duplex communication, while the MAX1490A/B feature full-duplex communication.
Drivers are short-circuit current limited and 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 known output (active-low RO low for the MAX1480A/B/C, RO high for the MAX1490A/B) if the input is open circuit.
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B typically withstand 1600VRMS (1 minute) or 2000VRMS (1 second). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480A/B/C are available in a 28-pin DIP package, and the MAX1490A/B are available in a 24-pin DIP package.
Technical Docs
| Data Sheet | Complete, Isolated RS-485/RS-422 Data Interface | Jun 08, 2005 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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