MM74HC221AM

The MM74HC221AM from Texas Instruments is a high-speed dual non-retriggerable monostable multivibrator utilizing advanced silicon-gate CMOS technology. It provides speeds comparable to low power Schottky TTL while retaining the benefits of CMOS, such as low power consumption and high noise immunity.

Key features include a typical propagation delay of 40 ns and a wide power supply range from 2V to 6V. The device has a low quiescent current of 80 µA maximum and a low input current of 1 µA maximum. It offers a fanout of 10 LS-TTL loads and a simple pulse width formula of T = RC, with a wide pulse range from 400 ns to infinity.

Each multivibrator has both a negative (A) and a positive (B) transition triggered input, which can also serve as inhibit inputs. A clear input, when taken low, resets the one-shot. The non-retriggerable nature ensures that the output pulse must time out before a new trigger is accepted. All inputs are protected against static discharge damage.

Available in a 16-Lead Plastic Dual-In-Line Package (PDIP), the MM74HC221AM is suitable for various digital logic applications requiring precise pulse generation.