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ISL4221E датащи(PDF) 1 Page - Intersil Corporation |
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ISL4221E датащи(HTML) 1 Page - Intersil Corporation |
1 / 13 page 1 ® FN6045.2 ISL4221E, ISL4223E QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kBps, RS-232 Transmitters/Receivers The Intersil ISL422XE 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 hand-held products where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and automatic powerdown functions, reduce the standby supply current to a 150nA 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 ISL4221E is a 1 driver, 1 receiver device and the ISL4223E is a 2 driver, 2 receiver device 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 lead TSSOP, and is nearly 20% thinner. The ISL422XE features an automatic powerdown 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 the ISL422XE, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family. Features • Available in Near Chip Scale QFN (5mmx5mm) Package which is 40% Smaller than a 20 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 0.1 μF Capacitors • Manual and Automatic Powerdown 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 Powerdown State . . . . . . . . . 150nA • Pb-Free Plus Anneal Available (RoHS Compliant) 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 Related Literature • Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices • ”Technical Brief TB379 “Thermal Characterization of Packages for ICs” • Technical Brief TB389 “PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages” TABLE 1. SUMMARY OF FEATURES PART NUMBER NO. OF Tx. NO. OF Rx. QFN PKG. AVAILABLE? DATA RATE (kBps) Rx. ENABLE FUNCTION? MANUAL POWERDOWN? AUTOMATIC POWERDOWN FUNCTION? ISL4221E 1 1 YES 250 YES YES YES ISL4223E 2 2 YES 250 YES YES YES Data Sheet April 13, 2007 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
Аналогичный номер детали - ISL4221E |
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Аналогичное описание - ISL4221E |
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