74HC221 IC - (SMD Package) - Dual Non-Retriggerable Monostable Multivibrator with Reset IC (74221 IC)

The 74HC221A high speed monostable multivibrators (one shots) utilize advanced silicon-gate CMOS technology. They feature speeds comparable to low power Schottky TTL circuitry while retaining the low power and high noise immunity characteristic of CMOS circuits. Each multivibrator features both a negative, A, and a positive, B, transition triggered input, either of which can be used as an inhibit input. Also included is a clear input that when taken low resets the one shot. The 74HC221A can be triggered on the positive transition of the clear while A is held LOW and B is held HIGH. The 74HC221A is a non-retriggerable, and therefore cannot be retriggered until the output pulse times out. Pulse width stability over a wide range of temperature and supply is achieved using linear CMOS techniques. The output pulse equation is simply: PW = (REXT) (CEXT); where PW is in seconds, R is in ohms, and C is in farads. All inputs are protected from damage due to static discharge by diodes to VCC and ground. Features:- • Typical propagation delay: 40 ns • Wide power supply range: 2V–6V • Low quiescent current: 80 µA maximum (74HC Series) • Low input current: 1 µA maximum • Fanout of 10 LS-TTL loads • Simple pulse width formula T = RC • Wide pulse range: 400 ns to ∞ (typ) • Part to part variation: ±5% (typ) • Schmitt Trigger A & B inputs enable infinite signal input rise or fall times Specification:- Symbol Parameter Value Unit VCC Supply Voltage − 0.5 to + 7.0V V VIN DC Input Voltage − 1.5 to VCC + 1.5V V VOUT DC Output Voltage − 0.5 to VCC + 0.5V V IIK, IOK Clamp Diode Current ± 20 mA IOUT DC Output Current, per pin ± 25 mA ICC DC VCC or GND Current, per pin ± 50 mA TSTG Storage Temperature Range − 65°C to + 150 °C PD Power Dissipation 500 mW TL Lead Temperature 260 °C Related Document:- 74HC221 SMD Data Sheet