Monostable multivibrators, also known as one-shot multivibrators, are a type of electronic circuit that can be used as a timer. They have one stable and one unstable state. The unstable state is caused by a trigger pulse. This state is transient, so the circuit always returns to stability after a fixed time has elapsed.
Generally, monostable multivibrator circuits are composed of two transistors, coupled with one resistor-capacitor network and one resistor network. These networks are what determines the length of time before the circuit returns to its stable state, after being triggered.
What are monostable multivibrators used for? Monostable multivibrators are used to produce a specific timed delay within a circuit. Therefore, they can broadly be used as timers or as pulse detectors in electronic equipment.
Types of monostable multivibrators There are two types of monostable multivibrators:
Retriggerable monostable multivibrators will remain in the unstable state with repeated application of the trigger pulse.
Non-retriggerable monostable multivibrators are unaffected by further trigger pulses, and will remain in the unstable state only for the predetermined period of time.
Description:
Texas Instruments Monostable Multivibrators and Voltage Controlled Oscillators
from the 74LS Family of Low Power Schottky Logic ICs. The 74LS Family use bipolar junction technology coupled with Schottky diode clamps to achieve operating speeds equal to the original 74TTL family but with much lower power consumption.
Description:
Dual retriggerable precision monostable multivibrator, The 74HC4538 is
a dual retriggerable-resettable monostable multivibrator. Each multivibrator has two trigger/retrigger inputs (nA and nB), a direct reset input (nCD), two complementary outputs (nQ and nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components CEXT and REXT. Typical pulse ...
Description:
Standard logic ICs using CMOS technology to achieve
operating speeds similar to LSTTL with the low power consumption of CMOS integrated circuits. The 74HC4000 logic family is functionally and pin-compatible with the standard LS logic family, and all devices have the ability to drive 10 LSTTL loads. High-Speed CMOS LogicOperating ...
Description:
Texas Instruments range of Monstable/Astable Multivibrators and Programmable
Timers from the 4000 Series CMOS Logic Family. CMOS Family devicesWide operating voltage range: 3 to 18V.
