±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers
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Overview
Description
These devices are BiCMOS interface ICs that are user configured as either a single RS-422, RS-485 differential transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver. In RS-232 mode, the on-board charge pump generates RS-232 compliant ±5V Tx output levels, from a supply as low as 4.5V. Four small 0.1µF capacitors are required for the charge pump. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V, and the Tx outputs handling ±12V. In RS-485 mode, the transceivers support both the RS-485 and RS-422 differential communication standards. The RS-485 receiver features full fail-safe operation, so the Rx output remains in a high state if the inputs are open or shorted together. The RS-485 transmitter supports up to three data rates, two of which are slew rate limited for problem-free communications. The charge pump disables in RS-485 mode, thereby saving power, minimizing noise and eliminating the charge pump capacitors. Both RS-232, RS-485 modes feature loopback and shutdown functions. The loopback mode internally connects the Tx outputs to the corresponding Rx input, which facilitates the implementation of board level self-test functions. The outputs remain connected to the loads during loopback, so connection problems (e. g., shorted connectors or cables) can be detected. The shutdown mode disables the Tx and Rx outputs, disables the charge pump if in RS-232 mode, and places the IC in a low current (35µA) mode. The ISL41387 is a QFN packaged device that offers additional functionality, including a lower speed and edge rate option (115kbps) for EMI sensitive designs, or to allow longer bus lengths. It also features a logic supply voltage pin (VL) that sets the VOH level of logic outputs, and the switching points of logic inputs, to be compatible with another supply voltage in mixed voltage systems. The QFN's choice of active high or low Rx enable pins increases design flexibility, allowing Tx/Rx direction control via a single signal by connecting DEN and RXEN together. For a dual port version of these devices, please see the ISL81334, ISL41334 datasheet.
Features
- 5V powered, user-selectable RS-232 or RS-485, RS-422 interface port (two RS-232 transceivers or one RS-485, RS-422 transceiver)
- ±15kV (HBM) ESD protected bus pins (RS-232 or RS-485)
- True flow-through pinouts simplify board layouts
- Pb-Free (RoHS compliant)
- Large (2.7V) differential VOUT for improved noise immunity in RS-485, RS-422 networks
- Full fail-safe (open/short) Rx in RS-485, RS-422 mode
- Loopback mode facilitates board self-test functions
- User-selectable RS-485 data rates: 20Mbps
- Slew rate limited: 460kbps
- Fast RS-232 data rate: up to 650kbps
- Low current shutdown mode: 35µA
Applications
Applications
- Gaming applications (eg, slot machines)
- Single board computers
- Factory automation
- Security networks
- Industrial/Process control networks
- Level translators (eg, RS-232 to RS-422)
- Point of sale (POS) equipment
Documentation
| Document title | Document type
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Date Date | |
|---|---|---|---|
| PDF 1.61 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 339 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 359 KB | Other | ||
| PDF 580 KB | Other | ||
| PDF 208 KB | Price Increase Notice | ||
| PDF 398 KB | Product Change Notice | ||
| PDF 98 KB | Product Change Notice | ||
| PDF 438 KB | Report | ||
| PDF 266 KB 简体中文 | Technical Brief | ||
| PDF 188 KB | Technical Brief | ||
| PDF 328 KB | Technical Brief | ||
| PDF 405 KB | Training | ||
| PDF 239 KB | Training | ||
| PDF 920 KB 简体中文 | White Paper | ||
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Design & Development
Boards & Kits
Boards & Kits
±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceiver Evaluation Board
The RoHS compliant ISL41387EVAL1Z evaluation board provides a quick and easy method for evaluating the ISL41387 dual protocol, BiCMOS, interface IC. The board also...
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Models
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Processing table
| SSOP | Tube | 660 | Get Samples, | |
| SSOP | Reel | 1000 |
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