Fault Protected, Extended Common Mode Range, RS-485/RS-422 Transceivers with 16.5kV ESD
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Overview
Description
The ISL3247xE are fault-protected, extended common-mode range differential transceivers that exceed the RS-485 and RS-422 standards for balanced communication. The RS-485 bus pins (driver outputs and receiver inputs) are fault protected against overvoltages up to ±60V and are protected against ±16. 5kV ESD strikes without latch-up. Additionally, these transceivers operate in environments with common-mode voltages up to ±15V (exceeds the RS-485 requirement), making this fault-protected RS-485 family one of the most robust on the market. The transmitters (Tx) deliver an exceptional 2. 5V (typical) differential output voltage into the RS-485 specified 54Ω load. This yields better noise immunity than standard RS-485 ICs or allows up to six 120Ω terminations in star topologies. The receiver (Rx) inputs feature a full fail-safe design that ensures a logic high Rx output if the Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. The Rx outputs feature high drive levels; typically, 15mA at VOL = 1V (to ease the design of opto-coupled isolated interfaces). Half duplex (Rx inputs and Tx outputs multiplexed together) and full duplex pinouts are available. For a fault-protected RS-485 transceiver with a ±25V extended common-mode range, see the ISL32490E and ISL32483E datasheets.
Features
- Fault protected RS-485 bus pins: Up to ±60V
- Extended common-mode range: ±15V
- larger than required for RS-485
- 1/4 unit load for up to 128 devices on the bus
- ±16.5kV HBM ESD protection on RS-485 bus pins
- High transient over-voltage tolerance: ±80V
- Full fail-safe (open, short, terminated) RS-485 receivers
- High Rx IOL for opto-couplers in isolated designs
- Hot plug circuitry: Tx and Rx outputs remain three-state during power-up/power-down
- RS-485 data rates: 250kbps to 15Mbps
- Low quiescent supply current: 2.3mA
- Ultra low shutdown supply current: 10µA
Applications
Applications
- Utility Meters/Automated Meter Reading Systems
- High Node Count RS-485 Systems
- PROFIBUS® and RS-485 Based Field Bus Networks, and Factory Automation
- Security Camera Networks
- Building Lighting and Environmental Control Systems
- Industrial/Process Control Networks
Documentation
| Document title | Document type
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Date Date | |
|---|---|---|---|
| PDF 1.34 MB | Datasheet | ||
| PDF 365 KB | Application Note | ||
| PDF 207 KB | Application Note | ||
| PDF 474 KB | Application Note | ||
| PDF 366 KB | Application Note | ||
| PDF 178 KB | Application Note | ||
| PDF 513 KB | Application Note | ||
| PDF 826 KB | Application Note | ||
| PDF 443 KB | Application Note | ||
| PDF 582 KB | Application Note | ||
| PDF 440 KB | Application Note | ||
| PDF 338 KB | Application Note | ||
| PDF 365 KB | Application Note | ||
| PDF 375 KB | Application Note | ||
| PDF 559 KB | Application Note | ||
| PDF 4.91 MB 日本語 | Brochure | ||
| PDF 2.95 MB | Brochure | ||
| PDF 156 KB | Other | ||
| PDF 253 KB | Other | ||
| PDF 254 KB | Other | ||
| PDF 208 KB | Price Increase Notice | ||
| PDF 266 KB | Product Change Notice | ||
| PDF 152 KB | Product Change Notice | ||
| PDF 438 KB | Report | ||
| PDF 266 KB 简体中文 | Technical Brief | ||
| PDF 188 KB | Technical Brief | ||
| PDF 405 KB | Training | ||
| PDF 239 KB | Training | ||
| PDF 246 KB 简体中文 | White Paper | ||
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
ISL32478EIBZ Active Samples Available |
SOICN | Tube | 980 | Get Samples, |
| SOICN | Reel | 2500 |
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