TC74HC4538AP/AF/AFT TOSHIBA CMOS Digital Integrate.
TC74HC4538AFT - Dual Retriggerable Monostable Multivibrator
TC74HC4538AP/AF/AFT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC4538AP, TC74HC4538AF, TC74HC4538AFT Dual Retriggerable Monostable.