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The MCS7840 is a USB-2.0 to Quad-Serial Port device. It has been developed to connect a wide range of standard serial devices to a USB host. The MCS7840 has a USB Device Controller connected to four (4) individual UARTs. Support for the following serial communication programs is included: HyperTerminal, PComm, Windows direct connection, Windows dial-up connection through modem, Networking over IrDA and Windows direct connection over IrDA, Minicom. USB-2.0 Device Controller On-Chip USB-2.0 PHY On-Chip Voltage Regulators Four 16c450/16c550 compatible UARTs Supports SIR IrDA Mode on any/all ports Supports RS-232, RS-485 and RS-422 Serial Ports 5, 6, 7 & 8-bit Serial Data support Hardware and Software Flow Control Serial Port speeds from 50 bps to 6 Mbps Custom BAUD Rates supported through external clock and/or by programming the internal PLL On-Chip 512-Byte FIFOs for upstream and downstream data transfers for each Serial Port Supports Remote Wakeup and Power Management features Serial Port Transceiver Shut-Down support Two-Wire I²C Interface for EEPROM EEPROM read/write through USB iSerial feature support with EEPROM One Bi-directional multi-function GPIO On-Chip buffers for Serial Port signals to operate without external Transceivers over short cable lengths Bus-Powered Device 64-Pin LQFP Package RoHS compliant Operating temperature range: 0°C to +70°C

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