Product Summary

The TC74VHC221AFT is a high speed CMOS monostable multivibrator fabricated with silicon gate C2MOS technology. The TC74VHC221AFT is two trigger inputs, A input (negative edge), and B input (positive edge). The input is valid for a slow rise/fall time signal (tr = tf = 1 s) as they are schmitt trigger input. The TC74VHC221AFT 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.

Parametrics

TC74VHC221AFT absolute maximum ratings: (1)Supply voltage range, VCC: -0.5 to 7.0 V; (2)DC input voltage, VIN: -0.5 to 7.0 V; (3)DC output voltage, VOUT: -0.5 to VCC + 0.5 V; (4)Input diode current, IIK: -20 mA; (5)Output diode current, IOK: ±20 mA; (6)DC output current, IOUT: ±25 mA; (7)DC VCC/ground current, ICC: ±50 mA; (8)Power dissipation, PD: 180 mW; (9)Storage temperature, Tstg: -65 to 150 °C.

Features

TC74VHC221AFT features: (1)High speed: tpd = 8.1 ns (typ.)at VCC = 5 V; (2)Low power dissipation: Standby state: 4 μA (max)at Ta = 25°C; Active state: 600 μA (max)at Ta = 25°C; (3)High noise immunity: VNIH = VNIL = 28% VCC (min); (4)Power down protection is equipped with all inputs.; (5)Balanced propagation delays: tpLH −∼ tpHL; (6)Wide operating voltage range: VCC (opr)= 2 to 5.5 V; (7)Pin and function compatible with TC74VHC221AFT.

Diagrams

TC74VHC221AFT pin connection

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