QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
Jump to Page Section:
Overview
Description
The ISL3232E, ISL4221E, and ISL4223E devices are 2. 7V to 5. 5V powered RS-232 transmitters/receivers that meet ElA/TIA-232 and V. 28/V. 24 specifications, even at VCC = 3. 0V. They provide ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and hand-held products where the low operational power consumption and even lower standby power consumption are critical. Efficient on-chip charge pumps, coupled with manual and automatic powerdown functions, reduce the standby supply current to a 150nA trickle. The 5mmx5mm Quad Flat No-Lead (QFN) packaging and the use of small, low value capacitors ensure board space savings. Data rates greater than 250kbps are ensured at worst case load conditions. The ISL4221E is a 1 driver, 1 receiver device and the ISL3232E and ISL4223E are 2 driver, 2 receiver devices that, coupled with the 5mmx5mm QFN package, provide the industry's smallest, lowest power serial port suitable for PDAs, and hand-held applications. The 5mmx5mm QFN requires 40% less board area than a 20 Ld TSSOP, and is nearly 20% thinner. The ISL4221E and ISL4223E versions feature an automatic powerdown function that powers down the on-chip power supply and driver circuits. Automatic powerdown occurs when an attached peripheral device is shut off or the RS-232 cable is removed, and conserves system power automatically without changes to the hardware or operating system. The ISL4221E and ISL4223E power back up automatically when a valid RS-232 voltage is applied to any receiver input.
Features
- Available in near chip scale QFN (5mmx5mm) package, which is 40% smaller than a 20 Ld TSSOP
- ESD protection for RS-232 I/O pins to ±15kV (IEC61000)
- Meets EIA/TIA-232 and V.28/V.24 specifications at 3V
- RS-232 compatible with VCC = 2.7V
- On-chip voltage converters require only four external 0.1µF capacitors
- Manual and automatic powerdown features (except ISL3232E)
- Receiver hysteresis for improved noise immunity
- Assured minimum data rate: 250kbps
- Wide power supply range: single +2.7V to +5.5V
- Low supply current in powerdown state: 150nA
- Pb-free (RoHS compliant)
Applications
Applications
- Any Space Constrained System Requiring RS-232 Ports Battery Powered, and Portable Equipment Hand-Held Products (GPS Receivers, Bar Code Scanners, etc) PDAs and Palmtops, Data Cables Cellular/Mobile Phones, Digital Cameras
Documentation
| Document title | Document type
|
Date Date | |
|---|---|---|---|
| PDF 364 KB | Datasheet | ||
| PDF 365 KB | Application Note | ||
| PDF 207 KB | Application Note | ||
| PDF 474 KB | Application Note | ||
| PDF 178 KB | Application Note | ||
| PDF 395 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 372 KB | Application Note | ||
| PDF 4.91 MB 日本語 | Brochure | ||
| PDF 2.95 MB | Brochure | ||
| PDF 1.90 MB | Other | ||
| PDF 293 KB | Other | ||
| PDF 653 KB | Other | ||
| PDF 225 KB | Product Change Notice | ||
| PDF 188 KB | Technical Brief | ||
| PDF 405 KB | Training | ||
| PDF 239 KB | Training | ||
| PDF 920 KB 简体中文 | White Paper | ||
|
23 items
|
|||
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
| QFN | Tube | 1200 | Get Samples, | |
| QFN | Reel | 6000 |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product