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Inside
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RS-485 transceiver with integrated protection
Product Features
- Integrated transient voltage protection
- Circuit damage protection of 400 W peak
- 250 Kbps throughput in electrically noisy environments
- Characterized for operation from 0°C to 70°C (SN75LBC184), -40°C to 85°C (SN65LBC184)
The SN75LBC184 is the industry's first '176 standard footprint
RS-485 differential transceiver to offer integrated transient
voltage protection up to 400W peak. The SN75LBC184 provides significant
protection from large over-voltage transients on the bus pins
which can be caused by secondary effects of a lightning strike
or power system switching disturbances.
These devices are well-suited for electrically noisy environments
requiring large over-voltage and common mode swing protection.
The SN75LBC184 and SN65LBC184 provide substantial benefits for
improved reliability and enhanced system performance resulting
in total system cost savings.
- Transient voltage suppression - protection from large
noise transients to reduce down time
- Integrated solution - on-chip to minimize cost and
printed board-space requirement
- Controlled driver slew rates - for reduced EMI and
improved data transmission at 250 Kbps over longer unterminated
cable runs and stub lengths
- Half unit load - for up to 64 similar devices connected
on a bus
- Other features - open-circuit fail safe, thermal shutdown,
power up/down glitch-free, and hysterisis
- Compatibility - drop-in replacement of current '176
designs and meet or exceed EIA RS-485 and ISO/IEC 482:1993(E)
standards.
The SN75LBC184 is a cost-effective, footprint compatible, device
delivering a high level of bus protection without the need of
external discrete clamping diodes and costly multi-chip modules.
These devices are available in 8-pin DIP and SOIC.
Typical applications
- Programmable logic controllers
- Industrial PCs
- Single-board computers
- Industrial LAN
- Automated test equipment
- Telecommunications (DTE/DCE)
- Point-of-sale
- Alarm systems
- Data monitoring systems
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