A touch screen driver driving a touch screen, which includes Tx lines (T1...Tj), Rx lines (R1...Ri) and touch sensors formed at crossings of the Tx lines (T1...Tj) and the Rx lines (R1...Ri), the touch screen driver comprising: a plurality of integrated circuits including a first integrated circuit (200A, 400A) and a second integrated circuit (200B, 400B), and configured to dividedly drive the touch screen, wherein one of the plurality of integrated circuits, which generates a driving signal to be supplied to the Tx lines (T1...Tj), transmits a synchronization signal (SYNC) synchronized with the driving signal to another integrated circuit, wherein the other integrated circuit receiving the synchronization signal (SYNC) receives charges of the touch sensors through the Rx lines (R1...Ri) in response to the synchronization signal (SYNC); characterized by a first touch recognition module configured to analyze touch raw data (RDATA) received from the first integrated circuit (200A, 400A), estimate coordinates of a first touch input position, and output first touch coordinate data; a second touch recognition module configured to analyze touch raw data (RDA-TA) received from the second integrated circuit (200B, 400B), estimate coordinates of a second touch input position, and output second touch coordinate data, wherein the first touch recognition module is embedded in the first integrated circuit (200A, 400A) and the second touch recognition module is embedded in the second integrated circuit (200B, 400B); and a data synchronization module configured to synchronize the first touch coordinate data and the second touch coordinate data output respectively from the first touch recognition module and the second touch recognition module, and to transmit the synchronized touch coordinate data to a host system. a plurality of integrated circuits including a first integrated circuit (200A, 400A) and a second integrated circuit (200B, 400B), and configured to dividedly drive the touch screen, wherein one of the plurality of integrated circuits, which generates a driving signal to be supplied to the Tx lines (T1...Tj), transmits a synchronization signal (SYNC) synchronized with the driving signal to another integrated circuit, wherein the other integrated circuit receiving the synchronization signal (SYNC) receives charges of the touch sensors through the Rx lines (R1...Ri) in response to the synchronization signal (SYNC); characterized by a first touch recognition module configured to analyze touch raw data (RDATA) received from the first integrated circuit (200A, 400A), estimate coordinates of a first touch input position, and output first touch coordinate data; a second touch recognition module configured to analyze touch raw data (RDA-TA) received from the second integrated circuit (200B, 400B), estimate coordinates of a second touch input position, and output second touch coordinate data, wherein the first touch recognition module is embedded in the first integrated circuit (200A, 400A) and the second touch recognition module is embedded in the second integrated circuit (200B, 400B); and a data synchronization module configured to synchronize the first touch coordinate data and the second touch coordinate data output respectively from the first touch recognition module and the second touch recognition module, and to transmit the synchronized touch coordinate data to a host system.