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.
| 芯片型号 | 产品状态 | 温度范围 | 封装尺寸图 | 潮湿敏感度等级MSL | 美元价格US $ |
| ISL81486IBZ | 量产 | 工业级 | 8 Ld SOIC | 1 | 0.93 |
| ISL81486IBZ-T | 量产 | 工业级 | 8 Ld SOIC T +R | 1 | 0.93 |
| ISL81486IUZ | 量产 | 工业级 | 8 Ld MSOP | 2 | 1.07 |
| ISL81486IUZ-T | 量产 | 工业级 | 8 Ld MSOP T +R | 2 | 1.07 |
| ISL81486IB | 停产 | 工业级 | 8 Ld SOIC | 1 | N/A |
| ISL81486IB-T | 停产 | 工业级 | 8 Ld SOIC T +R | 1 | N/A |
| ISL81486IU | 停产 | 工业级 | 8 Ld MSOP | 1 | N/A |
| ISL81486IU-T | 停产 | 工业级 | 8 Ld MSOP T +R | 1 | N/A |