The Intersil ISL4486 and ISL81486 are BiCMOS, 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication, and feature the larger output voltage and higher data rate - up to 40Mbps - required by high speed PROFIBUS applications.
Unlike competitive products, these Intersil devices are specified for 10% tolerance supplies (4.5V to 5.5V) and deliver at least a 2.3V differential output voltage over this supply range. At the 5% tolerance specified by many competitors, the ISL4486 delivers an unsurpassed 2.5V differential signal into a 54Ω total load. This translates into longer reach, or better data integrity, at the exceptional 40Mbps data rate.
SCSI applications benefit from the ISL4486's low receiver and transmitter part-to-part skews, which make it perfect for high speed parallel applications where large numbers of bits must be simultaneously captured. The low bit-to-bit skew eases the timing constraints on the data latching signal.
These devices present a "0.6 unit load" to the RS-485 bus, which allows up to 50 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.
Key Features
- Specified for 10% Tolerance Supplies
- High Data Rates ISL4486 up to 40Mbps ISL81486 up to 30Mbps
- Large Differential Output Voltage 3V into 54Ω
- Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications
- 0.6 Unit Load Allows up to 50 Devices on the Bus
- ISL81486 is a Drop-In Replacement for the ADM1486
- Low Quiescent Current 800µA
- -7V to +12V Common Mode Input Voltage Range
- Three State Rx and Tx Outputs
- 14ns (Max) Propagation Delays, 2ns (Max) Skew
- Operates from a Single +5V Supply (10% Tolerance)
- Current Limiting and Thermal Shutdown for driver Overload Protection
Applications
- SCSI "Fast 40" Drivers and Receivers
- PROFIBUS DP and FMS Networks
- Factory Automation
- Field Bus Networks
- Security Networks
- Building Environmental Control Systems
- Industrial/Process Control Networks
Order Information| Part Number | Package Type | Weight(g) | Pins | MSL Rating | Peak Temp (°C) | RoHS Status |
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| ISL81486IB | 8 Ld SOIC | 0.072 | 8 | 1 | 240 | |
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| ISL81486IB-T | 8 Ld SOIC T+R | 0.072 | 8 | 1 | 240 | |
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| ISL81486IBZ | 8 Ld SOIC | 0.072 | 8 | 1 | 260 | RoHS |
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| ISL81486IBZ-T | 8 Ld SOIC T+R | 0.072 | 8 | | 260 | RoHS |
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| ISL81486IU | 8 Ld MSOP | 0.025 | 8 | | 240 | |
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| ISL81486IU-T | 8 Ld MSOP T+R | 0.025 | 8 | | 240 | |
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| ISL81486IUZ | 8 Ld MSOP | 0.025 | 8 | 2 | 260 | RoHS |
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| ISL81486IUZ-T | 8 Ld MSOP T+R | 0.025 | 8 | 2 | 260 | RoHS |
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