ICL3237E

Features:

•ESD Protection For RS-232 I/O Pins to ±15kV (IEC61000)
•Pin Compatible Replacement for MAX3237E
•Pin Selectable, Guaranteed Data Rate . . 250kbps/1Mbps
•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 Capacitors
•Manual Powerdown Feature
•Flow Through Pinout
•Rx and Tx Hysteresis For Improved Noise Immunity
•Rx Active in Powerdown; Separate Rx Enable Pin
•Guaranteed Minimum Slew Rate. . . . . . .6V/µs or 24V/µs
•Wide Power Supply Range. . . . . . . . Single +3V to +5.5V
•Low Supply Current in Powerdown State. . . . . . . . . .10nA
•Pb-free available




Application

•Any System Requiring RS-232 Communication Ports
-Battery Powered, Hand-Held, and Portable Equipment
-Laptop Computers, Notebooks, Palmtops
-Modems, Printers and other Peripherals
-Data Cradles and Cables
-Cellular/Mobile Phone




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, EN, SHEN, MBAUD . . . . . . . . . . . . . . . . . . . . . .. . . -0.3V to 6V
R_IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25V
Output Voltages
T_OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±13.2V
R_OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . -0.3V to V_CC+0.3V
Short Circuit Duration
T_OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table




Description

The Intersil ICL3237E 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. Additionally, it provides 15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are cell phones, 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 the manual powerdown function, reduce the standby supply current to a 10nA trickle. Small footprint packaging, and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 1Mbps (MBAUD = VCC) are guaranteed at worst case load conditions. The ICL3237E is fully compatible with 3.3V only systems, mixed 3.3V and 5.0V systems, and 5.0V only systems. The ICL3237E is a 5 driver, 3 receiver device that also includes a noninverting always-active receiver for wake-up capability.