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Part Number: ISL4485E
Description: The Intersil ISL4485E is a high speed, BiCMOS 5V powered, single transceiver that meets both the RS-48...
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ISL4485E
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General Description
ISL4485E General Description
The Intersil ISL4485E is a high speed, BiCMOS 5V powered, single transceiver that meets both the RS-485 and RS-422 standards for balanced communication. Each driver output/receiver input is protected against ±15kV ESD strikes, without latch-up. Unlike competitive devices, this Intersil device is specified for 10% tolerance supplies (4.5V to 5.5V).
The excellent differential output voltage coupled with high drive-current output stages allow 20Mbps operation over twisted pair networks up to 450 feet in length.
The 25k receiver input resistance presents a "single unit load" to the RS-485 bus, allowing up to 32 transceivers on the network.
Receiver (Rx) inputs feature a "fail-safe if open" design, which ensures a logic high Rx output if Rx inputs are floating.Driver (Tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.
The half duplex configuration multiplexes the Rx inputs and Tx outputs to allow transceivers with Rx and Tx disable functions in 8 lead packages.
ISL4485E Maximum Ratings
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . ..... -0.5V to (VCC +0.5V)
Input / Output Voltages
A / Y, B / Z . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .. . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . -0.5V to (VCC +0.5V)
Short Circuit Duration
Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . ... . See Specification Table
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
ISL4485E Features
• Pb-Free Available (RoHS Compliant)
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Operates from a Single +5V Supply (10% Tolerance)
• 1 Unit Load Allows up to 32 Devices on the Bus
• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 700A
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 30ns Propagation Delays, 2ns Skew
• Current Limiting and Thermal Shutdown for driver Overload Protection
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Operates from a Single +5V Supply (10% Tolerance)
• 1 Unit Load Allows up to 32 Devices on the Bus
• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 700A
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 30ns Propagation Delays, 2ns Skew
• Current Limiting and Thermal Shutdown for driver Overload Protection
ISL4485E Typical Application
• SCSI "Fast 20" Drivers and Receivers
• Data Loggers
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators
• Data Loggers
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators
ISL4485E Connection Diagram
ISL4485E
PDF/DataSheet Download
- Datasheet: ISL4485E
- File Size: 412772 KB
- Manufacturer: INTERSIL [Intersil Corporation]
- Click here to Download
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