ICL3221, ICL3222, ICL3223, ICL3232, ICL3241, ICL3243

4. Application Information

FN4805 Rev.23.00

Page 22 of 36

Apr.26.19

4.14 Pin Compatible Replacements For 5V Devices

The ICL3221/22/32 are pin compatible with existing 5V RS-232 transceivers (see the “Features” on page 1 for

details), which coupled with the low ICC and wide operating supply range, make the ICL32xx potential lower

power, higher performance, drop-in replacements for existing 5V applications. As long as the ±5V RS-232 output

swings are acceptable, and transmitter input pull-up resistors are not required, the ICL32xx should work in most

5V applications.

When replacing a device in an existing 5V application, it is acceptable to terminate C3 to VCC as shown on the

“Typical Operating Circuits” on page 3. Terminate C3 to GND if possible, as slightly better performance results

from this configuration.