74HC221A High Speed Monostable Multivibrators
Advanced silicon-gate CMOS technology with speeds comparable to low power Schottky TTL.
- Supply Voltage: 0.5 to +7.0V
- DC Input Voltage: 1.5 to VCC + 1.5V
- DC Output Voltage: 0.5 to VCC + 0.5V
- Clamp Diode Current: ±20 mA
- DC Output Current, per pin: ±25 mA
- DC VCC or GND Current, per pin: ±50 mA
- Storage Temperature Range: -65°C to +150 °C
- Power Dissipation: 500 mW
Top Features:
- 40 ns typical propagation delay
- Wide power supply range: 2V–6V
- Low quiescent current: 80 µA max
- Simple pulse width formula T = RC
The 74HC221A high speed monostable multivibrators, utilizing advanced silicon-gate CMOS technology, offer speeds comparable to low power Schottky TTL circuits while maintaining low power and high noise immunity typical of CMOS circuits.
Each multivibrator includes both negative (A) and positive (B) transition triggered inputs, with the ability for either to serve as an inhibit input. A clear input, when taken low, resets the one shot. The 74HC221A can be triggered on the positive transition of clear while A is held LOW and B is held HIGH, making it non-retriggerable until the output pulse times out.
Pulse width stability over a wide range of temperature and supply is achieved through linear CMOS techniques. Inputs are protected from static discharge damage by diodes to VCC and ground.
The output pulse equation is simple: PW = (REXT) (CEXT) where PW is in seconds, R is in ohms, and C is in farads.
With Schmitt Trigger A & B inputs, infinite signal input rise or fall times are enabled. Part-to-part variation is typically ±5%.
For more details or bulk pricing inquiries, contact our sales team: sales02@thansiv.com, +91-8095406416.
* Images are for illustration only; actual product may vary.