3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) Transceiver in a SSOP Package
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Overview
Description
The ISL33334E, ISL33337E are two port interface ICs where port 1 is configured as a dual (2 Tx, 2 Rx) RS-232 transceiver and port 2 is a single RS-485/RS-422 transceiver. The on-board charge pump generates RS-232 compliant ±5V Tx output levels from a single VCC supply as low as 3. 15V. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V. The port 2 transceiver supports both the RS-485 and RS-422 differential communication standards. The receiver features full fail-safe operation, so the Rx output remains in a high state if the inputs are open or shorted together. The transmitter supports two data rates, one of which is slew rate limited for problem free communication at low data rates. The active low Rx enable pin (RE485) allows Tx/Rx direction control, via a single signal, simply by connecting the corresponding DE485 and RE485 pins together. The ISL33334E and ISL33337E also include a shutdown function, which disables the Tx and Rx outputs, disables the charge pumps and places the IC in a low current (40μA) mode. The ISL33337E is a QFN packaged device for space constrained applications.
Features
- ±15kV (HBM) ESD protected bus pins (RS-232 or RS-485)
- Operates from a single 3.3V supply
- Two independent ports, port 1 set for RS-232 (2 Transceivers) and port 2 for RS-485/RS-422 (1 transceiver)
- True flow-through pinouts (Rx inputs and Tx outputs all on the same side) simplify board layouts
- Pb-free (RoHS compliant)
- Full fail-safe (open/short) RS-485/422 Port 2 Rx
- User selectable RS-485 data rates
- Fast speed: up to 20Mbps
- Slew rate limited: up to 115kbps
- Fast RS-232 data rate: up to 400kbps
- Small charge pump capacitors: 4 x 0.1μF
- Low current shutdown mode: 40μA
- QFN package saves board space (ISL33337E only)
Documentation
| Document title | Document type
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Date Date | |
|---|---|---|---|
| PDF 1.37 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 2.95 MB | Brochure | ||
| PDF 1.17 MB | End Of Life Notice | ||
| PDF 156 KB | Other | ||
| PDF 253 KB | Other | ||
| PDF 359 KB | Other | ||
| PDF 580 KB | Other | ||
| 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 | ||
| PDF 918 KB 简体中文 | White Paper | ||
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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
| SSOP | Tube | 705 | ||
| SSOP | Reel | 1000 |
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