ICL3224: 1µA, +3V to +5.5V, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown

The Intersil ICL32XX devices are 3.0V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. 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 enhanced automatic powerdown functions, 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.

The ICL3244 is a 3 driver, 5 receiver device that provides a complete serial port suitable for laptop or notebook computers. The ICL3244/38 also include a noninverting always-active receiver for RING INDICATOR monitoring.

These devices feature an enhanced automatic powerdown function which powers down the on-chip powersupply and driver circuits. This occurs when all receiver and transmitter inputs detect no signal transitions for a period of 30sec. These devices power back up, automatically, whenever they sense a transition on any transmitter or receiver input.

Key Features
  • Pb-Free Plus Anneal Available (RoHS Compliant)
  • ±15kV ESD Protected (Human Body Model)
  • Manual and Enhanced Automatic Powerdown Features
  • Drop in Replacements for MAX3224, MAX3226, MAX3238, MAX3244
  • Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
  • Latch-Up Free
  • RS-232 Compatible with VCC = 2.7V
  • On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors
  • Flow-Through Pinout (ICL3238)
  • Guaranteed Mouse Driveability (ICL3244)
  • "Ready to Transmit" Indicator Output (ICL3224/26)
  • Receiver 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
    • Data Cradles
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN9863: 3V to +5.5V, 250k-1Mbps, RS-232 Transmitters/ReceiversPDF13 Nov 201495 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ICL3224, ICL3226, ICL3238, ICL3244 DatasheetPDF14 Nov 2014397 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ICL3224CA20 Ld SSOP0.151201240
ICL3224CA-T20 Ld SSOP T+R0.151201240
ICL3224CAZ20 Ld SSOP0.151202260RoHS
ICL3224CAZ-T20 Ld SSOP T+R0.151202260RoHS
ICL3224CP20 Ld PDIP1.520N/ANA
ICL3224IA20 Ld SSOP0.151201240
ICL3224IA-T20 Ld SSOP T+R0.151201240
ICL3224IAZ20 Ld SSOP0.151202260RoHS
ICL3224IAZ-T20 Ld SSOP T+R0.151202260RoHS
ICL3224, ICL3226, ICL3238, ICL3244 Datasheet 14 Nov 2014
20 Ld SSOP T+R ISL43240
20 Ld PDIP ISL83204A
ICL3224 IBIS Model 06 Nov 2014
ICL3238
AN9863: 3V to +5.5V, 250k-1Mbps, RS-232 Transmitters/Receivers 13 Nov 2014