ISL83386E

Features:

*V_L Pin for Compatibility with Mixed Voltage Systems
* ESD Protection for RS-232 I/O Pins to ±15kV (IEC61000)
* Low Power, Pin Compatible Upgrade for MAX3386E andSP3203E
* Single SHDN Pin Disables Transmitters and Receivers
* Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
* On-Chip Charge Pumps Require Only Four External 0.1F Capacitors
* Receiver Hysteresis For Improved Noise Immunity
* Very Low Supply Current . . . . . . . . . . . . . . . . . . . . 300A
* Guaranteed Minimum Data Rate . . . . . . . . . . . . . 250kbps
* Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
* Low Supply Current in Powerdown State. . . . . . . . . < 1A




Application

* Any System Requiring RS-232 Communication Ports
- Battery Powered, Hand-Held, and Portable Equipment
- Laptop Computers, Notebooks, Palmtops
- Digital Cameras
- PDA's and PDA Cradles
- Cellular/Mobile Phones




Pinout






Specifications

V_CC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
V_L to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
V- to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V to -7V
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Input Voltages
T_IN , SHDN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
R_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V
Output Voltages
T_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V
R_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V_L +0.3V)
Short Circuit Duration
T_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table




Description

The ISL83386E contains 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 cell phones where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with a manual powerdown function reduces 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 greater than 250kbps are guaranteed at worst case load conditions. The ISL83386E features a VL pin that adjusts the logic pin (see Pin Descriptions table) output levels and input thresholds to values compatible with the VCC powering the external logic (e.g., 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. Table 1 summarizes the features of the ISL83386E, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.