74HCT221 Dual non-retriggerable monostable multivibrator with reset
74HCT221D Dual non-retriggerable monostable multivibrator with reset
74HCT221D-T Monostable Multivibrator
74HCT221DB Dual non-retriggerable monostable multivibrator with reset
74HCT221N Dual non-retriggerable monostable multivibrator with reset