Renesas Electronics Corporation 1µA, +3V to +5.5V, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown ICL3226IAZ

The Intersil ICL32XX devices are 3.0V to 5.5V powered RS-232 transmitters/receive rs which meet ElA/TIA-232 and V.28/V.24 specifications, even at VsubCC/sub = 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.brbr 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.brbr These devices feature an enhanced iautomatic powerdown/i 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.

RS-232 Interface IC RS232 3V 1D/1R E-DWN IND