ICL32xxE devices are 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. 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 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 automatic powerdown functions (except for the ICL3232E), 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. The ICL324XE are 3-driver, 5-receiver devices that provide a complete serial port suitable for laptop or notebook computers. Both devices also include noninverting always-active receivers for “wake-up” capability. The ICL3221E, ICL3223E and ICL3243E, feature an automatic powerdown function which powers down the on-chip power-supply and driver circuits. This occurs when an attached peripheral device is shut off or the USB cable is disconnected from the computer.
The ICL32xxE family are low‑power RS‑232 transmitters/receivers that operate from 3.0 V to 5.5 V and meet EIA/TIA‑232 and V.28/V.24 specifications. They provide up to 250 kbps data rates, +15 kV ESD protection on all I/O pins, and automatic or manual power‑down functions to reduce standby current to 1 pA.
The document lists ordering information, pin‑out diagrams, typical application circuits, and detailed mechanical dimensions for SSOP, TSSOP, and SOIC packages. Applications include handheld, notebook, and other battery‑powered equipment that require compact, low‑power serial interfaces.
| Supply Voltage | 3.0 V to 5.5 V |
|---|---|
| Maximum Data Rate | 250 kbps |
| Standby Current | 1 pA |
| Transmitters / Receivers (ICL3221E) | 1 Tx, 1 Rx |
| Operating Temperature Range | -40 °C to +85 °C |
The standby supply current is reduced to a 1 pA trickle.
Data rates up to 250 kbps are guaranteed under worst‑case load conditions.
The ICL3221E includes one transmitter and one receiver.