Datasheet

LM555
SNAS548B –MAY 2004–REVISED JULY 2006 www.ti.com
Typical Performance Characteristics (continued)
Output Propagation Delay vs. Output Propagation Delay vs.
Voltage Level of Trigger Pulse Voltage Level of Trigger Pulse
Discharge Transistor (Pin 7) Discharge Transistor (Pin 7)
Voltage Voltage
vs. vs.
Sink Current Sink Current
APPLICATIONS INFORMATION
MONOSTABLE OPERATION
In this mode of operation, the timer functions as a one-shot (Figure 2). The external capacitor is initially held
discharged by a transistor inside the timer. Upon application of a negative trigger pulse of less than 1/3 V
CC
to
pin 2, the flip-flop is set which both releases the short circuit across the capacitor and drives the output high.
Figure 2. Monostable
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