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Part Number: MAX3480EA
Description: The MAX3480EA/MAX3480EB are electrically isolated RS-485/RS-422 data-communications interfaces. The RS...
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MAX3480EA
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DataSheet
General Description
MAX3480EA General Description
The MAX3480EA/MAX3480EB are electrically isolated RS-485/RS-422 data-communications interfaces. The RS-485/RS-422 I/O pins are protected against ±15kV electrostatic discharge (ESD) shocks, without latchup.
Transceivers, optocouplers, and a transformer are all included in one low-cost, 28-pin DIP package. A single +3.3V supply on the logic side powers both sides of the interface.
The MAX3480EB features 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 160kbps. The MAX3480EA's driver slew rate is not limited, allowing transmission rates up to 2.5Mbps.
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 the input is open circuit.
The MAX3480EA/MAX3480EB are guaranteed to withstand 1260VRMS (1min) or 1520VRMS (1s). Their isolated inputs and outputs meet RS-485/RS-422 specifications.
MAX3480EA Maximum Ratings
With Respect to GND
Supply Voltage (VCC1, VCC2, VCC4, VCC5) ..........-0.3V to +3.8V
Supply Voltage (VCC3) ..........................................-0.3V to +7V
Control Input Voltage (SD, FS) ...............-0.3V to (VCC3 + 0.3V)
Receiver Output Voltage (RO)..................-0.3V to (VCC5 + 0.3V)
With Respect to ISO COM
Control Input Voltage (ISO DE _)......-0.3V to (ISO VCC_ + 0.3V)
Driver Input Voltage (ISO DI _) ........-0.3V to (ISO VCC_ + 0.3V)
Receiver Output Voltage (ISO RO _) .-0.3V to (ISO VCC_ + 0.3V)
Driver Output Voltage (A, B)..................................-8V to +12.5V
Receiver Input Voltage (A, B)................................-8V to +12.5V
LED Forward Current (DI, DE, ISO RO LED) .......................50mA
Continuous Power Dissipation (TA = +70)
28-Pin Plastic DIP (derate 9.09mW/ above +70) ......727mW
Operating Temperature Ranges
MAX3480E_CPI........................................................0 to +70
MAX3480E_EPI.....................................................-40 to +85
Storage Temperature Range .............................-65 to +150
Lead Temperature (soldering, 10s) .................................+300
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
MAX3480EA Features
· Isolated Data Interface Guaranteed to 1260VRMS (1min)
· ±15kV ESD Protection for I/O Pins
· Slew-Rate-Limited Data Transmission (160kbps for MAX3480EB)
· High-Speed, Isolated, 2.5Mbps RS-485 Interface (MAX3480EA)
· Single +3.3V Supply
· Current Limiting and Thermal Shutdown for Driver Overload Protection
· Standard 28-Pin DIP Package
· Allows Up to 128 Transceivers on the Bus
· ±15kV ESD Protection for I/O Pins
· Slew-Rate-Limited Data Transmission (160kbps for MAX3480EB)
· High-Speed, Isolated, 2.5Mbps RS-485 Interface (MAX3480EA)
· Single +3.3V Supply
· Current Limiting and Thermal Shutdown for Driver Overload Protection
· Standard 28-Pin DIP Package
· Allows Up to 128 Transceivers on the Bus
MAX3480EA Typical Application
·Isolated RS-485/RS-422 Data Interface
·Transceivers for EMI-Sensitive Applications
·Industrial-Control Local Area Networks
·Automatic Test Equipment
·HVAC/Building Control Networks
·Telecom
·Transceivers for EMI-Sensitive Applications
·Industrial-Control Local Area Networks
·Automatic Test Equipment
·HVAC/Building Control Networks
·Telecom
MAX3480EA Connection Diagram
MAX3480EA
PDF/DataSheet Download
- Datasheet: MAX3480EA
- File Size: 344762 KB
- Manufacturer: Maxim
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