(Hong Kong)
Product Summary
The 74HC423A is a high speed CMOS monostable multivibrator fabricated with silicon gate C2MOS technology. The 74HC423A 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 Binput (positive edge). These inputs are valid for a slow rise/falltime signal (tr = tf = 1 s) as they are schmitt trigger inputs. After triggering, the output stays in a MONOSTABLE state fora time period determined by the external resistor and capacitor(Rx, Cx ). A low level at the CLR input breaks this state.
Parametrics
74HC423A absolute maximum ratings: (1)Supply voltage range, VCC: -0.5~7V; (2)DC input voltage, VIN: -0.5~VCC + 0.5V; (3)DC output voltage, VOUT: -0.5~VCC + 0.5V; (4)Input diode current, IIK: ±20mA; (5)Output diode current, IOK: ±20mA; (6)DC output current, IOUT: ±25mA; (7)DC VCC/ground currentICC: ±50mA; (8)Power dissipation, PD: 500mW; (9)Storage temperature, Tstg: -65~150℃.
Features
74HC423A features: (1)High speed: tpd = 25 ns (typ.) at VCC = 5 V; (2)Low power dissipation; (3)High noise immunity: VNIH = VNIL = 28% VCC (min); (4)Output drive capability: 10 LSTTL loads; (5)Symmetrical output impedance: |IOH| = IOL = 4 mA (min); (6)Balanced propagation delays; (7)Wide operating voltage range: VCC (opr) = 2~6 V; (8)Pin and function compatible with 74LS423.
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