The ICL3237E is a family of 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, it provides ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins).
The ICL3237E is a single‑supply (+3 V to +5.5 V) RS‑232 transmitter/receiver that meets EIA/TIA‑232 and V.28/V.24 specifications. It offers +15 kV ESD protection on all I/O pins, selectable data rates of 250 kbps or 1 Mbps, and a low‑power shutdown mode.
Targeted for battery‑powered handheld devices such as cell phones, PDAs, and notebooks, the device uses only four small external capacitors, achieves a typical 0.8 mA operating current and drops to 10 nA in power‑down, making it ideal for space‑constrained, low‑standby‑current applications.
| Supply Voltage Range | +3 V to +5.5 V |
|---|---|
| Selectable Data Rate | 250 kbps / 1 Mbps |
| ESD Protection | +15 kV (IEC61000) |
| Operating Supply Current | 0.8 mA typical |
| Power‑down Supply Current | 10 nA |
| External Capacitors Required | Four 0.1 µF (or 0.22 µF) capacitors |
The device supports selectable data rates of up to 1 Mbps in MegaBaud mode.
Only four small external capacitors (0.1 µF or 0.22 µF) are required.
Power‑down is controlled by the SHDN pin, which is active low to shut down the transmitters and on‑chip supply.
The I/O pins are protected up to +15 kV according to IEC61000 standards.