SLLS792B June 2007 – July 2021 TRS3221E
The power block increases, inverts, and regulates voltage at V+ and V– pins using a charge pump that requires four external capacitors. The automatic power-down feature for the driver is controlled by FORCEON and FORCEOFF inputs. The receiver is controlled by the EN input (see Table 8-1 and Table 8-2).
When the device is unpowered, it can be safely connected to an active remote RS232 device.