MAX221 Datasheet | Maxim Integrated

19-1520; Rev 0; 8/99 +5V, 1µA, Single RS-232 Transceiver with AutoShutdown General Description The MAX221 is a +5V-powered, single transmit/receive RS-232 and V.28 munications interface with automatic shutdown/wake-up Features and high data rate capabilities. The MAX221 achieves a low 1µA supply current with Maxim’s revolutionary AutoShutdown™ feature. AutoShutdown saves power without changes to the existing BIOS or operating system by entering lowpower shutdown mode when the RS-232 cable is disconnected, or when the transmitter of the connected peripheral is off. The MAX221 wakes up and drives the INVALID pin high when an active RS-232 cable is connected, signaling the host...