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 TOSHIBA
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TC74HC221AP/AF/AFN 2007-10-01 1 TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC221AP,TC74HC221AF,TC74HC221AFN Dual Monostable Multivibrator The TC74HC221A is a high speed CMOS MONOSTABLE MULTIVIBRATOR fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. There are two trigger inputs, A input (negative edge), and B input (positive edge). These inputs are valid for a slow rise/fall time signal (tr = tf = 1 s) as they are schmitt trigger inputs. This device may also be triggered by using CLR input (positive edge). After triggering, the output stays in a MONOSTABLE state for a time period determined by the external resistor and capacitor (Rx, Cx ). A low level at the CLR input breaks this state. Limits for Cx and Rx are: External capacitor, Cx: No limit External resistor, Rx: VCC = 2.0 V more than 5 kΩ VCC ≥ 3.0 V more than 1 kΩ All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features (Note) • High speed: tpd = 25 ns (typ.) at VCC = 5 V • Low power dissipation Standy by State: ICC = 4 μA (max) at Ta = 25°C Active State: ICC = 700 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Output drive capability: 10 LSTTL loads • Symmetrical output impedance: |IOH| = IOL = 4 mA (min) • Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 to 6 V • Pin and function compatible with 74LS221 Note: In the case of using only one circuit, CLR should be tied to GND, Rx/Cx･Cx･Q･ Q should be tied to OPEN, the other inputs should be tied to VCC or GND. Note: xxxFN (JEDEC SOP) is not available in Japan. TC74HC221AP TC74HC221AF TC74HC221AFN Weight DIP16-P-300-2.54A : 1.00 g (typ.) SOP16-P-300-1.27A : 0.18 g (typ.) SOL16-P-150-1.27 : 0.13 g (typ.) |
