QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10nA, 250kbps, RS-232 Transmitters/Receivers
Jump to Page Section:
Overview
Description
Intersil's ISL4241E, ISL4243E devices are 2. 7V to 5. 5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V. 28/V. 24 specifications, even at VCC = 3. 0V. Additionally, 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 notebook and laptop computers where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and automatic power-down functions, reduce the standby supply current to a 10nA trickle. Tiny 5mmx5mm Quad Flat No-Lead (QFN) packaging and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions. The ISL4241E, ISL4243E's are 3 driver, 5 receiver devices that, coupled with the 5x5 QFN package, provide the industry's smallest, lowest power complete serial port suitable for PDAs, and laptop or notebook computers. The 32 Ld 5X5 QFN requires 60% less board area than a 28 Ld TSSOP, and is nearly 20% thinner. The devices also include a noninverting always-active receiver for wake-up capability. The ISL4243E features an automatic power-down function that powers down the on-chip power-supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system power automatically without changes to the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input. Table 1 summarizes the features of both the ISL4241E and ISL4243E, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.
Features
- Pb-Free Available (RoHS compliant)
- Parameters Fully Specified for 10% Tolerance Supplies and Full Industrial Temp Range
- Available in Small QFN (5mmx5mm) Package which is 60% Smaller than a 28 Lead 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 Power-down Features
- Receiver Hysteresis For Improved Noise Immunity
- Guaranteed Minimum Data Rate: 250kbps
- Wide Power Supply Range: Single +2.7V to +5.5V
- Low Supply Current in Power-down State: 10nA
Applications
Applications
- Any Space Constrained System Requiring RS-232 Ports Battery Powered, Hand-Held, and Portable Equipment Laptop Computers, Notebooks PDAs and Palmtops, Data Cables Cellular/Mobile Phones, Digital Cameras, GPS
Documentation
| Title | Type | Date | |
|---|---|---|---|
PDF674 KB
|
Datasheet
|
||
PDF365 KB
|
Application Note
|
||
PDF207 KB
|
Application Note
|
||
PDF474 KB
|
Application Note
|
||
PDF178 KB
|
Application Note
|
||
PDF395 KB
|
Application Note
|
||
PDF513 KB
|
Application Note
|
||
PDF443 KB
|
Application Note
|
||
PDF582 KB
|
Application Note
|
||
PDF440 KB
|
Application Note
|
||
PDF338 KB
|
Application Note
|
||
PDF365 KB
|
Application Note
|
||
PDF375 KB
|
Application Note
|
||
PDF372 KB
|
Application Note
|
||
Brochure
|
|||
PDF2.95 MB
|
Brochure
|
||
PDF1.91 MB
|
Other
|
||
PDF293 KB
|
Other
|
||
PDF653 KB
|
Other
|
||
PDF225 KB
|
Product Change Notice
|
||
PDF188 KB
|
Technical Brief
|
||
White Paper
|
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