Renesas Electronics Corporation QFN, ±15kV ESD Protected, 250kbps, RS-232 Transmitters/Receivers with Logic Supply Pin ISL3243EIRZ

The Intersil ISL324xE devices are 2.7V to 3.6V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at VsubCC/sub = 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 POS systems, 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 automatic power-down functions, reduce the standby supply current to a 0.5µA trickle. Tiny 5mmx5mm bQuad Flatbr No-Lead/b (QFN) 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.brbr ISL324xE are 3 driver, 5 receiver devices that, coupled with the 5x5 QFN package, provide the industry's smallest, lowest power complete serial port. The 5x5 QFN requires 60% less board area than a 28 Ld TSSOP, and is nearly 20% thinner. These devices also include a noninverting always-active receiver for "wake-up" capability.brbr The bISL3243E/b features an bautomatic powerdown/b function that powers down the on-chip power supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system power automatically without changes to the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input.brbr The ISL324xE feature a VsubL/sub pin that adjusts the logic pin (see "Pin Descriptions" on page 2) output levels and input thresholds to values compatible with the VsubCC/sub powering the external logic (e.g., a UART).brbr Table 1 summarizes

RS-232 Interface IC RS232 W/VL 3V 3D/5R 15KV AUTODWN