±15kV ESD Protected, +3V to +5.5V, 1 Microamp, 250kbps, RS-232 Transmitters/Receivers with Separate Logic Supply

The ISL83386E contains 3. 0V to 5. 5V powered RS-232 transmitters/receivers that meet ElA/TIA-232 and V. 28/V. 24 specifications, even at VCC = 3. 0V. Targeted applications are PDAs, Palmtops, and cell phones in which the low operational power consumption, and even lower standby power consumption is critical. Efficient on-chip charge-pumps, coupled with a manual power-down function reduces the standby supply current to a 1µA trickle. Small footprint packaging and the use of small, low value capacitors ensures board space savings as well. Data rates greater than 250kbps are ensured at worst case load conditions. The ISL83386E features a VL pin that adjusts the logic pin (see “Pin Descriptions” on page 3) output levels and input thresholds to values compatible with the VCC powering the external logic (such as a UART). The single pin powerdown function ( SHDN = 0) disables all the receiver and transmitter outputs, while shutting down the charge pump to minimize supply current drain.