ICL3226E

Features:

• Pb-free Available as an Option (see Ordering Information)
• ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
• Manual and Enhanced Automatic Powerdown Features
• Drop in Replacements for MAX3224E, MAX3226E, MAX3244E
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• RS-232 Compatible with V_CC= 2.7V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four External 0.1µF Capacitors
• Guaranteed Mouse Driveability (ICL3244E)
• "Ready to Transmit" Indicator Output (ICL3224E/26E)
• 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





Application

• 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




Pinout






Specifications

V_CCto Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V+ to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . -0.3V to 7V
V- to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
T_IN, FORCEOFF, FORCEON . . . . . . . . . . . . . . . . . ....... -0.3V to 6V
R_IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . ±25V
Output Voltages
T_OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±13.2V
R_OUT, INVALID, READY . . . . . . . . . . .. ... . . . . -0.3V to VCC+0.3V
Short Circuit Duration
T_OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . .See Specification Table




Description

The Intersil ICL3226E 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. 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 enhanced automatic powerdown functions, reduce the standby supply current to a 1A trickle. Small footprint packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates of the ICL3226E 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 ICL3244E is a 3 driver, 5 receiver device that provides a complete serial port suitable for laptop or notebook computers. It also includes a noninverting always-active receiver for wake-up capability. These devices, feature an enhanced automatic powerdown function of the ICL3226E 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 30 seconds. These devices power back up, automatically, whenever they sense a transition on any transmitter or receiver input.