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The Intersil ISL83220E is a 3.0V to 5.5V powered RS-232 transmitter/receiver which meets ElA/TIA-232 and V.28/V.24 specifications, even at V_CC = 3.0V. Additionally, it provides ±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 a manual powerdown function, reduce the standby supply current to a 1µA trickle. Small footprint 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. This family is fully compatible with 3.3V only systems, mixed 3.3V and 5.0V systems, and 5.0V only systems.

Table 1 summarizes the features of the ISL83320E, while Application Note AN9863 summarizes the features of each device comprising the ICL32XXE 3V family.

Key Features

• Pb-Free Plus Anneal Available (RoHS Compliant)
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Drop in Replacement for SP3220E
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible Outputs at 2.7V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors
• Manual Powerdown Feature with Receivers Active
• Separate Receiver Enable Pin
• RX and TX Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate 250kbps
• Guaranteed Minimum Slew Rate 6V/µs
• Wide Power Supply Range Single +3V to +5.5V
• Low Supply Current in Powerdown State 1µA

Applications

• Any System Requiring RS-232 Communication Ports
  • Battery Powered, Hand-Held, and Portable Equipment
  • Laptop Computers, Notebooks, Palmtops
  • Modems, Printers and other Peripherals
  • Digital Cameras
  • Cellular/Mobile Phones